{ "data": { "a": { "slug": "harnessrouter", "name": "HarnessRouter", "vendor": "HarnessRouter (Lumentree Corporation)", "vendorUrl": "https://harnessrouter.ai", "kind": "harness", "category": "agent-harnesses", "summary": "HarnessRouter runs complete agent harnesses such as Codex, Claude Code and Hermes behind one HTTP API, the Unified Harness Protocol, with sessions, streaming, files and artifacts. It comes as a hosted cloud or a self-hosted Community Edition.", "url": "https://www.anchorterminal.com/tools/harnessrouter", "markdownUrl": "https://www.anchorterminal.com/tools/harnessrouter.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/harnessrouter.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/harnessrouter.json", "dns": "harnessrouter.grade.anchorterminal.com", "repo": "https://github.com/HarnessRouter/harnessrouter", "license": "Apache-2.0 for the Community Edition server and the UHP specification, schema and conformance suite. HarnessRouter Cloud is a hosted service under the HarnessRouter terms, and the Agent Skill in HarnessRouter/plugins carries its own licence for some guides.", "transports": [ "http" ], "remoteUrl": "https://api.harnessrouter.ai", "packages": [ { "registry": "oci", "name": "harnessrouter/harnessrouter" } ], "auth": "api-key", "authNotes": "A Workspace API key (sk-hr-) as a Bearer token from the product's server, never from a browser (https://harnessrouter.ai/docs/authentication). Keys are created in the console after a browser sign-up, can be held to one workspace or reach the whole organisation, and are revoked at once by DELETE /v1/orgs/{org}/keys/{id}. No OAuth or per-endpoint scopes found. The self-hosted Community Edition signs into its console with a username and password and needs no HarnessRouter key.", "pricing": "usage", "pricingNotes": "Free plan at $0 with no card, for the console and configuring agents, with 2 tasks at a time during its 7-day trial. Running tasks draws on top-up credit ($10 minimum, 5.5 per cent fee, minimum $0.80) or a plan, Developer $20, Production $200 or Scale $1,000 a month, each fully included as usage. Agent work is $0.020 an active minute on top-ups and $0.014 to $0.006 on plans, and model calls are at the provider's price or on your own keys (https://harnessrouter.ai/pricing.md, checked 2026-11-04). Self-serve payment is card-only.", "priceSummary": "$20 / mo", "where": "hosted", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in llms.txt, llms-full.txt, the pricing page or the UHP schema (checked 2026-10-17). Payment is by card for top-ups and plans.", "endpoints": [] }, "toolCount": 0, "popularity": { "githubStars": 4069, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-11-04" }, "docsUrl": "https://harnessrouter.ai/docs", "llmsTxt": "https://harnessrouter.ai/llms.txt", "openapi": "https://github.com/HarnessRouter/harnessrouter/blob/main/protocol/schema/uhp-2026-10-04.openapi.yaml", "capabilities": [ "agent.harness", "agent.mcp-client", "agent.multi-agent" ], "tags": [ "hosted", "self-hosted", "open-source", "apache-2.0", "api-key", "usage", "openapi", "llms-txt", "docker", "python", "streaming", "cloud-agent", "agent-skill" ], "lastRelease": "2026-11-03", "graded": true, "anchor": { "graded": true, "score": 47.7, "grade": "D", "agentReady": false, "rank": 1144, "ranked": true, "rankOf": 1510, "categoryRank": 46, "methodology": "0.7", "run": "2026-10-01", "scores": { "ergonomics": 73, "maintenance": 72, "payments": 25, "reliability": 35, "schema": 83, "security": 60, "transparency": 73 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-11-04" }, "negative": -11, "negativeNotes": [ "2026-10-06, -5. Privately reported flaws fixed in public commits #416 to #429 on 6 and 7 October 2026. The gateway source names them GHSA-p6cq-54cg-8mpv (a bearer token that failed verification still reached internal routes, so anyone could rewrite any organisation's connections and routing; \"found live on the hosted service and closed there the same way, 2026-10-06\"), GHSA-qrr8-m92f-7vfp (identity headers trusted by default), GHSA-mw9j-m5jf-5r56 and GHSA-c5g7-c47h-f6c3 (server-side request forgery through git imports and upload addresses) and GHSA-rmh9-whjx-gfrc (secrets with quotes or non-ASCII characters left unredacted). A workspace key could also read, change and delete another workspace's harnesses, sessions and responses and mint an organisation-wide key (\"reported privately three times\"). All were fixed within days and described in the source. The advisory pages couldn't be read (GitHub answered 403), so whether they're published is unchecked, and the deduction is lower than an open cross-tenant flaw would get. Source https://github.com/HarnessRouter/harnessrouter/blob/main/gateway/app.py", "2026-10-10, -3. Since 10 October 2026 harness writes carrying a field the harness doesn't have, or a `default_model` its base doesn't run, are refused with 422 (`model_not_available` for the model), where they were accepted with 200 before. UHP's own versioning rules reserve such a tightening for a new version. The first notice was the known-compromises entry added to the versioning page in the same commit on 10 October, the day the hosted service made the change, and the changelog followed on 19 October (same-day term; it applies to the hosted service, so the 0.x reading doesn't reach it). Source https://github.com/HarnessRouter/harnessrouter/blob/main/protocol/VERSIONING.md", "2026-11-03, -3. Release v0.37.16 (3 November) fixes a flaw its commit describes with no advisory identifier. A relay route kept a connection's key usable after its turn ended, even after the operator removed the connection (\"200 on the turn's route after the turn had ended\"). The v0.37.15 fixes of 2 November (credentials and instance secrets readable by agent turns, the published default console password accepted) cite GHSA-m479 and GHSA-r37g in the source, and other v0.37.16 and v0.37.17 fixes cite GHSA-3vf8, GHSA-fx92, GHSA-gf7m-w8pf-6f68, GHSA-mm72-wr37-26pv and GHSA-mx6c-8c42-fw44, so they aren't counted here. None of those advisories could be read (GitHub answered 403). Source https://github.com/HarnessRouter/harnessrouter/commit/430358a" ], "verdict": "A product's server sends a task to a named harness and gets streamed progress, sessions and files back, under a published OpenAPI contract with idempotency keys and a closed set of error codes. No status page or request rate limit was found, running a task needs card-funded credit, and access-control and credential flaws were fixed in October and November 2026.", "bestFor": "A product team that wants to run Codex, Claude Code, Hermes or 27 other harnesses server-side behind one task, session and file contract, and switch between them by changing an ID.", "strengths": [ "UHP is published as OpenAPI 3.1 and JSON Schema 2020-12 under Apache-2.0, with a 101-check conformance suite in the repository", "Every task call takes an Idempotency-Key, and the error envelope has a closed code set, with a retry rule per code", "Per-turn budgets (400 steps, 7,200 seconds and $10 by default) cap what one task can spend", "30 harnesses listed as available, including Codex, Claude Code, Hermes, OpenCode, goose and Qoder, behind one task contract", "245 tagged releases between 15 August and 3 November 2026, and the self-hosted Community Edition runs with no HarnessRouter account" ], "weaknesses": [ "No status page found (status.harnessrouter.ai has no DNS record), and the terms give no service level without a signed Order Form", "No request rate limit is published. Only concurrency (2 tasks at a time in the Free trial) and task length (30 minutes, or 1 hour after a top-up) are stated", "Running a task on the hosted service draws on credit, and top-ups and plans are card-only, so an agent can't start without a person", "Access-control, SSRF and redaction flaws were fixed on 6 and 7 October 2026, and credential exposure to agent turns on 2 and 3 November, with no advisory readable", "Harness writes with unknown fields began failing with 422 on 10 October 2026, announced only that day in the versioning page and on 19 October in the changelog" ], "agentNotes": [ "Name the harness yourself. The task call is POST /{harness_id}/v1/responses, and HarnessRouter doesn't choose a harness for you", "Send a fresh Idempotency-Key with each new task, reuse it only for a retry of the same request, and recover from the session if a stream drops", "Call cancel to stop work. Closing the SSE connection leaves the agent running and billing", "Keep the Workspace API key on the server. The docs forbid calling the API from a browser with it", "Check each tool's enforcement in GET /v1/bases. On bases marked instruction, disabled_tools is a request to the model, not a block" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 4, "avgRating": 2.5, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "D", "methodology": "0.7", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 47.7 } ], "editorialScores": { "ergonomics": 73, "maintenance": 72, "payments": 25, "reliability": 35, "schema": 83, "security": 60, "transparency": 79 }, "provenanceScore": 67, "checked": { "categories": { "ergonomics": "2026-11-04", "maintenance": "2026-11-04", "payments": "2026-11-04", "reliability": "2026-11-04", "schema": "2026-11-04", "security": "2026-11-04", "transparency": "2026-11-04" }, "last": "2026-11-04", "lastMoved": "2026-11-04", "oldest": "2026-11-04", "stale": false, "staleAfterDays": 90 } }, "connect": { "install": "docker run -d --name harnessrouter -p 127.0.0.1:3000:3000 -v harnessrouter:/data harnessrouter/harnessrouter", "http": "curl -N https://api.harnessrouter.ai/$HARNESS_ID/v1/responses -H \"Authorization: Bearer $HR_API_KEY\" -H \"Idempotency-Key: $(uuidgen)\" -H \"Content-Type: application/json\" -d '{\"input\": \"Review this uploaded agreement and return a checklist.\", \"stream\": true}'" }, "letme": { "capability": "https://letme.dev/agent.harness", "tool": "https://letme.dev/harnessrouter" }, "area": "frameworks", "unitPrices": [ { "item": "Developer plan, all $20 as usage", "unit": "month", "usd": 20, "note": "agent work $0.014 an active minute, one workspace" }, { "item": "Production plan, all $200 as usage", "unit": "month", "usd": 200, "note": "agent work $0.010 an active minute, five workspaces" }, { "item": "Scale plan, all $1,000 as usage", "unit": "month", "usd": 1000, "note": "agent work $0.006 an active minute, tracing included" }, { "item": "Agent work on top-up credit, per hour of active work", "unit": "session-hour", "usd": 1.2, "note": "$0.020 an active minute, billed by the second. Waiting on the model, the user or a queue isn't billed" }, { "item": "Tracing add-on", "unit": "month", "usd": 50, "note": "beta, included with Scale" } ], "provenance": { "legalEntity": "Lumentree Corporation", "domain": "harnessrouter.ai", "domainRegistered": "2026-06-18", "endpointOnVendorDomain": true, "terms": "https://harnessrouter.ai/legal/terms", "privacy": "https://harnessrouter.ai/legal/privacy", "statusPage": "", "changelog": "https://unifiedharnessprotocol.org/changelog", "securityTxt": "none", "checked": "2026-11-04", "notes": [ "The terms (v1.1, 31 July 2026) name Lumentree Corporation, a California corporation, as the contracting party, and the disclosure policy names the same company. The YC launch lists the company as Epsilla (Summer 2023), per the 17 October check.", "harnessrouter.ai was registered on 18 June 2026 and unifiedharnessprotocol.org on 12 August 2026, from the registry RDAP readings of 17 October 2026 (not re-read; RDAP is a JSON service).", "No status page. status.harnessrouter.ai has no DNS record (4 November 2026) and no other status page was found.", "harnessrouter.ai/.well-known/security.txt answered 404 on 17 October 2026 (not re-read). A disclosure policy is at /legal/security, and SECURITY.md in the repository names GitHub private reporting and contact@harnessrouter.ai.", "The changelog is the UHP specification's (protocol/CHANGELOG.md in the repository). HarnessRouter itself has 245 tags in the repository and no product changelog page was found.", "The terms (§4.4(c)) forbid scraping or crawling except as allowed by the documentation, an API endpoint, robots.txt or written permission. robots.txt on harnessrouter.ai names ClaudeBot, Claude-User and Claude-SearchBot and allows all paths, and unifiedharnessprotocol.org allows all paths (4 November 2026)." ], "score": 67 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/harnessrouter.json", "live": { "slug": "harnessrouter", "probe": { "target": "https://api.harnessrouter.ai", "method": "get", "lastAt": "2026-11-07T19:22:10.914710049Z", "lastOk": true, "lastStatus": 404, "lastMs": 345, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 289, "p95ms24h": 384, "samples24h": 238, "samples30d": 5155, "days": [ { "date": "2026-10-17", "probes": 21, "ok": 21 }, { "date": "2026-10-18", "probes": 256, "ok": 256 }, { "date": "2026-10-19", "probes": 255, "ok": 255 }, { "date": "2026-10-20", "probes": 252, "ok": 252 }, { "date": "2026-10-21", "probes": 253, "ok": 253 }, { "date": "2026-10-22", "probes": 253, "ok": 253 }, { "date": "2026-10-23", "probes": 248, "ok": 248 }, { "date": "2026-10-24", "probes": 251, "ok": 251 }, { "date": "2026-10-25", "probes": 250, "ok": 250 }, { "date": "2026-10-26", "probes": 252, "ok": 252 }, { "date": "2026-10-27", "probes": 249, "ok": 249 }, { "date": "2026-10-28", "probes": 251, "ok": 251 }, { "date": "2026-10-29", "probes": 248, "ok": 248 }, { "date": "2026-10-30", "probes": 249, "ok": 249 }, { "date": "2026-10-31", "probes": 251, "ok": 251 }, { "date": "2026-11-01", "probes": 249, "ok": 249 }, { "date": "2026-11-02", "probes": 250, "ok": 250 }, { "date": "2026-11-03", "probes": 248, "ok": 248 }, { "date": "2026-11-04", "probes": 246, "ok": 246 }, { "date": "2026-11-05", "probes": 185, "ok": 185 }, { "date": "2026-11-06", "probes": 241, "ok": 241 }, { "date": "2026-11-07", "probes": 197, "ok": 197 } ] }, "versions": [ { "registry": "github", "name": "HarnessRouter/harnessrouter", "version": "v0.38.2", "released": "2026-11-04", "seenAt": "2026-11-06T23:32:20.439259022Z" } ], "githubStars": 4262, "securityTxt": { "url": "https://harnessrouter.ai/.well-known/security.txt", "state": "none", "checkedAt": "2026-11-07T16:00:32.980927731Z" }, "llmsTxt": { "url": "https://harnessrouter.ai/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-11-07T15:32:40.598398049Z" }, "domain": { "domain": "harnessrouter.ai", "registered": "2026-06-18", "source": "https://rdap.identitydigital.services/rdap/domain/harnessrouter.ai", "checkedAt": "2026-11-01T14:17:32.25734582Z" }, "pages": [ { "url": "https://unifiedharnessprotocol.org/changelog", "kind": "deprecations", "status": 304, "checkedAt": "2026-11-07T14:22:52.813950452Z", "changedAt": "2026-11-04T08:35:29.196603298Z", "fingerprint": "df248ace8f95" }, { "url": "https://harnessrouter.ai/pricing.md", "kind": "pricing", "status": 200, "checkedAt": "2026-11-07T14:10:52.413474371Z", "changedAt": "2026-10-18T23:31:33.798956939Z", "fingerprint": "b31b753df12b" }, { "url": "https://harnessrouter.ai/legal/privacy", "kind": "privacy", "status": 200, "checkedAt": "2026-11-07T14:10:48.041658297Z", "changedAt": "2026-11-03T07:51:05.619736871Z", "fingerprint": "3de312eb4d16" }, { "url": "https://harnessrouter.ai/legal/terms", "kind": "terms", "status": 200, "checkedAt": "2026-11-07T14:10:50.353093961Z", "changedAt": "2026-11-03T07:51:07.897150705Z", "fingerprint": "d25dce7ee92b" } ], "github": { "repo": "harnessrouter/harnessrouter", "checkedAt": "2026-11-02T08:53:53.843359717Z", "stars": 3860, "archived": false, "issuesEnabled": true, "pushedAt": "2026-11-02T02:10:02Z", "openIssues": 16, "openPRs": 5, "issuesOpened90d": 85, "issuesClosed90d": 69, "prsMerged90d": 479, "ci": { "branch": "main", "runs": 50, "success": 50, "failure": 0, "other": 0, "latest": "success", "latestAt": "2026-11-01T10:11:08Z" }, "advisories": [ { "ghsa": "GHSA-59mq-hx4p-fw48", "severity": "medium", "published": "2026-10-08T04:42:01Z" }, { "ghsa": "GHSA-c5g7-c47h-f6c3", "severity": "medium", "published": "2026-10-08T01:58:14Z" }, { "ghsa": "GHSA-qrr8-m92f-7vfp", "severity": "high", "published": "2026-10-07T19:55:26Z" }, { "ghsa": "GHSA-mw9j-m5jf-5r56", "severity": "high", "published": "2026-10-07T19:24:34Z" }, { "ghsa": "GHSA-7pwj-vv9r-rh2m", "severity": "medium", "published": "2026-10-07T07:13:59Z" }, { "ghsa": "GHSA-rmh9-whjx-gfrc", "severity": "medium", "published": "2026-10-07T07:13:58Z" }, { "ghsa": "GHSA-4386-3vpq-3xhx", "severity": "high", "published": "2026-10-06T21:59:22Z" }, { "ghsa": "GHSA-p6cq-54cg-8mpv", "severity": "critical", "published": "2026-10-06T21:59:21Z" }, { "ghsa": "GHSA-cgf4-38c9-39vr", "severity": "high", "published": "2026-10-06T21:32:58Z" }, { "ghsa": "GHSA-9pjr-97x3-c4wv", "severity": "high", "published": "2026-10-06T21:32:57Z" }, { "ghsa": "GHSA-5hfm-crcm-5vh7", "severity": "high", "published": "2026-10-06T20:00:17Z" } ], "replies": { "sampled": 25, "unanswered": 6, "medianDays": 0.9 } }, "updatedAt": "2026-11-07T19:22:10.914710049Z" } }, "answer": "Sculptor scores 53.1 (D) on agent readiness against HarnessRouter's 47.7 (D), and leads in 3 of 7 scored categories. HarnessRouter leads on schema \u0026 documentation, agent ergonomics and transparency \u0026 trust.", "b": { "slug": "sculptor", "name": "Sculptor", "vendor": "Imbue, Inc.", "vendorUrl": "https://imbue.com", "kind": "harness", "category": "agent-harnesses", "summary": "Sculptor is Imbue's open-source desktop app for running coding agents in parallel, each in an isolated copy of your code, with built-in skills for agentic development. It's labelled an experimental research preview.", "url": "https://www.anchorterminal.com/tools/sculptor", "markdownUrl": "https://www.anchorterminal.com/tools/sculptor.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/sculptor.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/sculptor.json", "dns": "sculptor.grade.anchorterminal.com", "repo": "https://github.com/imbue-ai/sculptor", "license": "MIT", "transports": [], "packages": [], "auth": "none", "pricing": "free", "pricingNotes": "Free and open source. You pay for the coding agents it runs, through your own subscriptions or API keys (checked 2026-11-07).", "priceSummary": "Free · OSS", "where": "local", "x402": { "level": "no", "evidence": "No payment protocol in the repository or README (checked 2026-11-07).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": null, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-11-07" }, "docsUrl": "https://github.com/imbue-ai/sculptor#readme", "capabilities": [ "agent.harness", "agent.multi-agent" ], "tags": [ "open-source", "mit", "desktop-app", "new" ], "lastRelease": "2026-11-06", "graded": true, "anchor": { "graded": true, "score": 53.1, "grade": "D", "agentReady": false, "rank": 966, "ranked": true, "rankOf": 1510, "categoryRank": 37, "methodology": "0.7", "run": "2026-10-01", "scores": { "ergonomics": 50, "maintenance": 75, "payments": 60, "reliability": 43, "schema": 45, "security": 57, "transparency": 57 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "low", "date": "2026-11-07" }, "negative": 0, "verdict": "Imbue's open-source app for parallel coding agents in isolated workspaces, with telemetry off until you choose otherwise. It's an experimental research preview that warns of bugs and drastic changes, Mac and Linux only, with no changelog.", "bestFor": "Developers who want parallel coding agents in isolated workspaces and are fine with a research preview.", "strengths": [ "Each workspace is an isolated copy of the code, reviewed and merged back", "Analytics, error reporting and session recording default to off, with consent at first run", "Built-in skills for agentic development", "MIT from Imbue, with CI on pull requests" ], "weaknesses": [ "Labelled an experimental research preview that may change drastically", "Mac (Apple Silicon) and Linux only", "No changelog file", "Few outside contributions accepted for now" ], "agentNotes": [ "Download from the README's links, connect a repository and create a workspace before prompting", "Review the diff before merging a workspace back to main" ], "metrics": { "kind": "local", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "low", "grade": "D", "methodology": "0.7", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 53.1 } ], "editorialScores": { "ergonomics": 50, "maintenance": 75, "payments": 60, "reliability": 43, "schema": 45, "security": 57, "transparency": 73 }, "provenanceScore": 40, "checked": { "categories": { "ergonomics": "2026-11-07", "maintenance": "2026-11-07", "payments": "2026-11-07", "reliability": "2026-11-07", "schema": "2026-11-07", "security": "2026-11-07", "transparency": "2026-11-07" }, "last": "2026-11-07", "oldest": "2026-11-07", "stale": false, "staleAfterDays": 90 } }, "connect": { "install": "Download for Mac (Apple Silicon) or Linux from the README" }, "letme": { "capability": "https://letme.dev/agent.harness", "tool": "https://letme.dev/sculptor" }, "area": "frameworks", "provenance": { "legalEntity": "Imbue, Inc.", "domain": "imbue.com", "domainRegistered": "", "domainNote": "Not looked up: RDAP isn't requested under the 1 November 2026 rules.", "endpointOnVendorDomain": null, "terms": "", "privacy": "", "statusPage": "", "changelog": "", "securityTxt": "none", "checked": "2026-11-07", "notes": [ "The licence names Imbue, Inc.. The repository is github.com/imbue-ai/sculptor." ], "score": 40 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/sculptor.json", "live": { "slug": "sculptor", "securityTxt": { "url": "https://imbue.com/.well-known/security.txt", "state": "none", "checkedAt": "2026-11-07T16:01:32.925074454Z" }, "updatedAt": "2026-11-07T16:01:32.925074454Z" } }, "edges": [ { "by": 38, "category": "schema", "leads": "harnessrouter", "name": "Schema \u0026 documentation", "reasons": { "a": "API reading. UHP's OpenAPI 3.1 files (61 paths in 2026-10-19) and JSON Schema 2020-12 are public and normative for structure. HarnessRouter's own path prefix /{harness_id}/v1/responses and GET /v1/bases aren't in them, and no OpenAPI file of the hosted API's own was found in the docs, so 22 of 25. llms.txt, llms-full.txt, agents.md, docs.md, pricing.md and harnesses.md (10). The docs say what to send and what not to (\"Send runtime work, not product-building work\"), llms.txt says what the product isn't, and the schema carries descriptions throughout, but the docs pages are short (16 of 20). Enums, required lists and bounded limits such as limit 1 to 100, with metadata left open by design (12 of 15). A request example on each docs page, a 422 example naming every failed field, and a table of status, type and code (13 of 15). Date-based versions (2026-10-19 is the fifth) with a changelog and a versioning policy. Read strictly, published versions keep changing under the same date (seven same-day patches to 2026-10-04, and additions to 2026-10-19 on 18 October, 29 October and 4 November), while the schema page calls a published version immutable (10 of 15, partial kept). The conformance page and the suite's README now agree on 101 checks. 22 + 10 + 16 + 12 + 13 + 10 = 83.", "b": "Harness reading. A README, specs and agent docs in the repository; no API reference (45)." }, "scores": { "a": 83, "b": 45 } }, { "by": 35, "category": "payments", "leads": "sculptor", "name": "Payments \u0026 pricing", "reasons": { "a": "Published rubric, for the hosted service. No machine payment protocol (0). Per-unit prices without a login, agent work per active minute and model calls at listed provider prices per million tokens (20). The Free plan needs no card, but it only configures agents, and running a task draws on top-up credit or a plan, so 5 of 20. A person signs up in a browser and creates the key in the console (0). 0 + 20 + 5 + 0 = 25. Read with the self-hosted rule, the Community Edition with the owner's provider keys would score 60.", "b": "Free self-hosted software with nothing to buy, so 0 for a protocol and 20 each for public pricing, a free tier and onboarding with no sign-up, 60." }, "scores": { "a": 25, "b": 60 } }, { "by": 23, "category": "ergonomics", "leads": "harnessrouter", "name": "Agent ergonomics", "reasons": { "a": "API reading. Sessions, turns and files are separate reads, and list endpoints take limit and cursor, but there's no field selection on a response (15 of 25). Cursor paging on session and memory lists with a bounded limit, and few filters found (14 of 20). One error envelope with type, code, param and detail, a closed code set, a retry rule per code and a 422 that lists every failed field without echoing the body (18 of 20). Idempotency-Key on task creation, reuse only for the same request, recover from the session after a drop, and an explicit cancel because closing the stream doesn't stop work (18 of 20). Only input is required to run a task, and budgets default to 400 steps, 7,200 seconds and $10. No official SDK, only the OpenAI Responses shape, clients generated from the OpenAPI file and an Agent Skill (8 of 15). 73 in all.", "b": "Harness reading. Workspaces as isolated copies, review and merge back, and built-in skills (50)." }, "scores": { "a": 73, "b": 50 } }, { "by": 16, "category": "transparency", "leads": "harnessrouter", "name": "Transparency \u0026 trust", "reasons": { "a": "Editorial half. The server, specification, schema and conformance suite are Apache-2.0. The Cloud's own billing and deployment wasn't confirmed to match the open code, and the Agent Skill has a custom licence for some guides (25 of 30). The privacy policy, DPA, subprocessor list and a retention page agree. Customer content isn't used for training without an opt-in, and periods are stated (tasks deleted at once, agents and files after 30 days, backups within 14 days, credentials within 90, free-plan task records 7 days). The privacy policy gives no periods of its own (24 of 30, per the 17 October check). Deprecation 15 of 20 (was 14). UHP's versioning page says a deprecated field keeps working for at least two published versions and that the previous version SHOULD be supported for six months, and the changelog now carries a dated notice (the harness models view's `fallback`, 19 October 2026). The rule is counted in versions, not time, so dated notices give 15. Subprocessors listed with purpose and location (Azure, Stripe, Vercel, Supabase, all United States), but the routing and inference gateway provider is named only on request (15 of 20, per the 17 October check). 25 + 24 + 15 + 15 = 79. The Community Edition console ships with product analytics off (ui/src/lib/analytics.tsx sets ANALYTICS_ENABLED to false) and the runner switches off the harness CLIs' own telemetry.", "b": "MIT (30). Consent-based telemetry documented in the repository (18 of 30). The README warns of drastic changes during the research preview, with no deprecation policy (5). Opt-in telemetry (20). 30 + 18 + 5 + 20 = 73." }, "scores": { "a": 73, "b": 57 } }, { "by": 8, "category": "reliability", "leads": "sculptor", "name": "Reliability", "reasons": { "a": "Hosted reading, for HarnessRouter Cloud at api.harnessrouter.ai, as on 17 October. No status page (status.harnessrouter.ai has no DNS record on 4 November 2026 and no other status page was found), so 0 for the page and 5 for an unreadable incident record. No request rate limit with numbers was found. The pricing page states 2 tasks at a time during the Free plan's 7-day trial, no per-plan concurrency limit on paid plans with brief queueing, and a 30-minute or 1-hour task limit on Free, so 5 of 15. 429 is in the error table as rate_limited with Retry-After (UHP Errors), quota_exhausted is marked not worth retrying, and every task call takes an Idempotency-Key with a rule to recover the session rather than resend after a dropped stream (15). Terms §5.4 still give no service level outside a signed Order Form (0). The task API isn't labelled beta, while tracing and agent memory are (10). 0 + 5 + 5 + 15 + 0 + 10 = 35.", "b": "Local software. Desktop downloads for Mac (Apple Silicon), Linux and Linux ARM64 (20). checks.yml and a PR gate run on the repository; pass state not read (15). GitHub issues and pull requests weren't read (GitHub's pages refuse these sessions), so that line is scored absent (0). sculptor-v tags up to v0.49.0, no changelog file (8). 0.x and labelled a research preview (0). 20 + 15 + 0 + 8 + 0 = 43." }, "scores": { "a": 35, "b": 43 } } ], "facts": [ { "a": "Agent harness", "b": "Agent harness", "name": "Kind" }, { "a": "HarnessRouter (Lumentree Corporation)", "b": "Imbue, Inc.", "name": "Vendor" }, { "a": "https://api.harnessrouter.ai", "b": "no (local only)", "name": "Hosted endpoint" }, { "a": "HTTP", "b": "", "name": "Transports" }, { "a": "API key", "b": "None", "name": "Auth" }, { "a": "Pay per use", "b": "Free", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "Apache-2.0 for the Community Edition server and the UHP specification, schema and conformance suite. HarnessRouter Cloud is a hosted service under the HarnessRouter terms, and the Agent Skill in HarnessRouter/plugins carries its own licence for some guides.", "b": "MIT", "name": "Licence" }, { "a": "0", "b": "none", "name": "Tools exposed" }, { "a": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "yes", "b": "no", "name": "llms.txt" }, { "a": "2026-11-03", "b": "2026-11-06", "name": "Last release" }, { "a": "no date given", "b": "no document linked", "name": "Terms last updated" }, { "a": "2026-07-30", "b": "no document linked", "name": "Privacy policy last updated" }, { "a": "yes, with an opt-out", "b": "not read yet", "name": "Customer content may train models" }, { "a": "yes", "b": "not read yet", "name": "Terms restrict automated access" }, { "a": "not found in the text", "b": "not read yet", "name": "Terms restrict benchmarking" }, { "a": "not found in the text", "b": "not read yet", "name": "Terms or service can change without notice" }, { "a": "yes", "b": "not read yet", "name": "Arbitration or class-action waiver" }, { "a": "4.1k stars", "b": "none", "name": "Popularity" }, { "a": "2.5/5 (4)", "b": "none", "name": "Agent reviews" } ], "faq": [ { "answer": "Sculptor scores 53.1 (D) on agent readiness against HarnessRouter's 47.7 (D), and leads in 3 of 7 scored categories. HarnessRouter leads on schema \u0026 documentation, agent ergonomics and transparency \u0026 trust.", "question": "Which is better for AI agents, HarnessRouter or Sculptor?" }, { "answer": "Yes. HarnessRouter is open source (Apache-2.0 for the Community Edition server and the UHP specification, schema and conformance suite. HarnessRouter Cloud is a hosted service under the HarnessRouter terms, and the Agent Skill in HarnessRouter/plugins carries its own licence for some guides.). Sculptor is open source (MIT).", "question": "Are HarnessRouter and Sculptor open source?" } ], "goodFor": [ { "aheadOn": [ "Schema \u0026 documentation, 83 against 45", "Agent ergonomics, 73 against 50", "Transparency \u0026 trust, 73 against 57" ], "also": [ "A hosted endpoint, with nothing to install" ], "goodFor": "A product team that wants to run Codex, Claude Code, Hermes or 27 other harnesses server-side behind one task, session and file contract, and switch between them by changing an ID.", "slug": "harnessrouter", "watchFor": "No status page found (status.harnessrouter.ai has no DNS record), and the terms give no service level without a signed Order Form" }, { "aheadOn": [ "Reliability, 43 against 35", "Payments \u0026 pricing, 60 against 25" ], "also": [ "No key needed to call it", "No incidents deducted, where HarnessRouter loses 11 points for them" ], "goodFor": "Developers who want parallel coding agents in isolated workspaces and are fine with a research preview.", "slug": "sculptor", "watchFor": "Labelled an experimental research preview that may change drastically" } ], "history": { "harnessrouter": [ { "causes": [ "correction", "event" ], "date": "2026-11-04", "delta": -5.6, "from": 53.3, "fromGrade": "D", "to": 47.7, "toGrade": "D" }, { "causes": [ "method" ], "date": "2026-10-30", "delta": -0.1, "from": 53.4, "fromGrade": "D", "to": 53.3, "toGrade": "D" }, { "causes": [ "method" ], "date": "2026-10-27", "delta": 0.2, "from": 53.2, "fromGrade": "D", "to": 53.4, "toGrade": "D" } ], "sculptor": null }, "job": { "capability": "agent.harness", "name": "Agent harnesses" }, "others": [ { "json": "https://www.anchorterminal.com/compare/agent-zero-vs-harnessrouter.json", "title": "Agent Zero vs HarnessRouter", "url": "https://www.anchorterminal.com/compare/agent-zero-vs-harnessrouter" }, { "json": "https://www.anchorterminal.com/compare/agent-zero-vs-sculptor.json", "title": "Agent Zero vs Sculptor", "url": 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Sculptor", "url": "https://www.anchorterminal.com/compare/jules-vs-sculptor" }, { "json": "https://www.anchorterminal.com/compare/junie-vs-sculptor.json", "title": "Junie CLI vs Sculptor", "url": "https://www.anchorterminal.com/compare/junie-vs-sculptor" }, { "json": "https://www.anchorterminal.com/compare/kilo-code-cli-vs-sculptor.json", "title": "Kilo Code CLI vs Sculptor", "url": "https://www.anchorterminal.com/compare/kilo-code-cli-vs-sculptor" }, { "json": "https://www.anchorterminal.com/compare/kimi-code-cli-vs-sculptor.json", "title": "Kimi Code CLI vs Sculptor", "url": "https://www.anchorterminal.com/compare/kimi-code-cli-vs-sculptor" }, { "json": "https://www.anchorterminal.com/compare/kiro-cli-vs-sculptor.json", "title": "Kiro CLI vs Sculptor", "url": "https://www.anchorterminal.com/compare/kiro-cli-vs-sculptor" }, { "json": "https://www.anchorterminal.com/compare/letta-vs-sculptor.json", "title": "Letta vs Sculptor", "url": "https://www.anchorterminal.com/compare/letta-vs-sculptor" }, { "json": "https://www.anchorterminal.com/compare/mini-swe-agent-vs-sculptor.json", "title": "mini-swe-agent vs Sculptor", "url": "https://www.anchorterminal.com/compare/mini-swe-agent-vs-sculptor" }, { "json": "https://www.anchorterminal.com/compare/minimax-code-vs-sculptor.json", "title": "MiniMax Code vs Sculptor", "url": "https://www.anchorterminal.com/compare/minimax-code-vs-sculptor" }, { "json": "https://www.anchorterminal.com/compare/mistral-vibe-cli-vs-sculptor.json", "title": "Mistral Vibe CLI vs Sculptor", "url": "https://www.anchorterminal.com/compare/mistral-vibe-cli-vs-sculptor" }, { "json": "https://www.anchorterminal.com/compare/muse-code-vs-sculptor.json", "title": "Muse Code vs Sculptor", "url": "https://www.anchorterminal.com/compare/muse-code-vs-sculptor" }, { "json": "https://www.anchorterminal.com/compare/openai-agents-api-vs-sculptor.json", "title": "OpenAI Agents API vs Sculptor", "url": "https://www.anchorterminal.com/compare/openai-agents-api-vs-sculptor" }, { "json": "https://www.anchorterminal.com/compare/openai-codex-vs-sculptor.json", "title": "OpenAI Codex vs Sculptor", "url": "https://www.anchorterminal.com/compare/openai-codex-vs-sculptor" }, { "json": "https://www.anchorterminal.com/compare/opencode-vs-sculptor.json", "title": "OpenCode vs Sculptor", "url": "https://www.anchorterminal.com/compare/opencode-vs-sculptor" }, { "json": "https://www.anchorterminal.com/compare/openhands-vs-sculptor.json", "title": "OpenHands vs Sculptor", "url": "https://www.anchorterminal.com/compare/openhands-vs-sculptor" }, { "json": "https://www.anchorterminal.com/compare/orca-vs-sculptor.json", "title": "Orca vs Sculptor", "url": "https://www.anchorterminal.com/compare/orca-vs-sculptor" }, { "json": "https://www.anchorterminal.com/compare/paseo-vs-sculptor.json", "title": "Paseo vs Sculptor", "url": "https://www.anchorterminal.com/compare/paseo-vs-sculptor" }, { "json": "https://www.anchorterminal.com/compare/prime-agent-vs-sculptor.json", "title": "Prime Agent vs Sculptor", "url": "https://www.anchorterminal.com/compare/prime-agent-vs-sculptor" }, { "json": "https://www.anchorterminal.com/compare/qoder-cli-vs-sculptor.json", "title": "Qoder CLI vs Sculptor", "url": "https://www.anchorterminal.com/compare/qoder-cli-vs-sculptor" }, { "json": "https://www.anchorterminal.com/compare/qwen-code-vs-sculptor.json", "title": "Qwen Code vs Sculptor", "url": "https://www.anchorterminal.com/compare/qwen-code-vs-sculptor" }, { "json": "https://www.anchorterminal.com/compare/reflection-mirror-vs-sculptor.json", "title": "Mirror CLI vs Sculptor", "url": "https://www.anchorterminal.com/compare/reflection-mirror-vs-sculptor" }, { "json": "https://www.anchorterminal.com/compare/rovo-dev-cli-vs-sculptor.json", "title": "Rovo Dev CLI vs Sculptor", "url": "https://www.anchorterminal.com/compare/rovo-dev-cli-vs-sculptor" }, { "json": "https://www.anchorterminal.com/compare/sculptor-vs-t3-code.json", "title": "Sculptor vs T3 Code", "url": "https://www.anchorterminal.com/compare/sculptor-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/sculptor-vs-traycer.json", "title": "Sculptor vs Traycer", "url": "https://www.anchorterminal.com/compare/sculptor-vs-traycer" }, { "json": "https://www.anchorterminal.com/compare/sculptor-vs-unstoppable.json", "title": "Sculptor vs Unstoppable", "url": "https://www.anchorterminal.com/compare/sculptor-vs-unstoppable" }, { "json": "https://www.anchorterminal.com/compare/sculptor-vs-verdent.json", "title": "Sculptor vs Verdent", "url": "https://www.anchorterminal.com/compare/sculptor-vs-verdent" }, { "json": "https://www.anchorterminal.com/compare/sculptor-vs-vibe-trading.json", "title": "Sculptor vs Vibe-Trading", "url": "https://www.anchorterminal.com/compare/sculptor-vs-vibe-trading" }, { "json": "https://www.anchorterminal.com/compare/sculptor-vs-warp.json", "title": "Sculptor vs Warp (Warp Agent CLI and the Oz Agent API)", "url": "https://www.anchorterminal.com/compare/sculptor-vs-warp" }, { "json": "https://www.anchorterminal.com/compare/clawboo-vs-harnessrouter.json", "title": "Clawboo vs HarnessRouter", "url": "https://www.anchorterminal.com/compare/clawboo-vs-harnessrouter" }, { "json": "https://www.anchorterminal.com/compare/clawboo-vs-sculptor.json", "title": "Clawboo vs Sculptor", "url": "https://www.anchorterminal.com/compare/clawboo-vs-sculptor" }, { "json": "https://www.anchorterminal.com/compare/cli-manager-vs-harnessrouter.json", "title": "CLI Manager vs HarnessRouter", "url": "https://www.anchorterminal.com/compare/cli-manager-vs-harnessrouter" }, { "json": "https://www.anchorterminal.com/compare/cli-manager-vs-sculptor.json", "title": "CLI Manager vs Sculptor", "url": "https://www.anchorterminal.com/compare/cli-manager-vs-sculptor" }, { "json": "https://www.anchorterminal.com/compare/harness-autonomous-vs-harnessrouter.json", "title": "Harness vs HarnessRouter", "url": "https://www.anchorterminal.com/compare/harness-autonomous-vs-harnessrouter" }, { "json": "https://www.anchorterminal.com/compare/harness-autonomous-vs-sculptor.json", "title": "Harness vs Sculptor", "url": "https://www.anchorterminal.com/compare/harness-autonomous-vs-sculptor" }, { "json": "https://www.anchorterminal.com/compare/harnessrouter-vs-paperclip.json", "title": "HarnessRouter vs Paperclip", "url": "https://www.anchorterminal.com/compare/harnessrouter-vs-paperclip" }, { "json": "https://www.anchorterminal.com/compare/harnessrouter-vs-parallax-agents.json", "title": "HarnessRouter vs Parallax", "url": "https://www.anchorterminal.com/compare/harnessrouter-vs-parallax-agents" }, { "json": "https://www.anchorterminal.com/compare/openmausbot-vs-sculptor.json", "title": "OpenMausBot vs Sculptor", "url": "https://www.anchorterminal.com/compare/openmausbot-vs-sculptor" }, { "json": "https://www.anchorterminal.com/compare/paperclip-vs-sculptor.json", "title": "Paperclip vs Sculptor", "url": "https://www.anchorterminal.com/compare/paperclip-vs-sculptor" }, { "json": "https://www.anchorterminal.com/compare/parallax-agents-vs-sculptor.json", "title": "Parallax vs Sculptor", "url": "https://www.anchorterminal.com/compare/parallax-agents-vs-sculptor" } ], "panel": null, "scores": [ { "by": 8, "edge": "sculptor", "harnessrouter": 35, "key": "reliability", "name": "Reliability", "sculptor": 43, "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "by": 38, "edge": "harnessrouter", "harnessrouter": 83, "key": "schema", "name": "Schema \u0026 documentation", "sculptor": 45, "weight": 13 }, { "by": 23, "edge": "harnessrouter", "harnessrouter": 73, "key": "ergonomics", "name": "Agent ergonomics", "sculptor": 50, "weight": 13 }, { "by": 3, "edge": "harnessrouter", "harnessrouter": 60, "key": "security", "name": "Security \u0026 auth", "sculptor": 57, "weight": 14 }, { "by": 35, "edge": "sculptor", "harnessrouter": 25, "key": "payments", "name": "Payments \u0026 pricing", "sculptor": 60, "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "by": 3, "edge": "sculptor", "harnessrouter": 72, "key": "maintenance", "name": "Maintenance \u0026 community", "sculptor": 75, "weight": 7 }, { "by": 16, "edge": "harnessrouter", "harnessrouter": 73, "key": "transparency", "name": "Transparency \u0026 trust", "sculptor": 57, "weight": 7 } ], "summary": "Sculptor scores 53.1 (D) on agent readiness against HarnessRouter's 47.7 (D), and leads in 3 of 7 scored categories. HarnessRouter leads on schema \u0026 documentation, agent ergonomics and transparency \u0026 trust. Both do agent harnesses.", "tasks": null, "tutorials": [], "verdicts": { "harnessrouter": "A product's server sends a task to a named harness and gets streamed progress, sessions and files back, under a published OpenAPI contract with idempotency keys and a closed set of error codes. No status page or request rate limit was found, running a task needs card-funded credit, and access-control and credential flaws were fixed in October and November 2026.", "sculptor": "Imbue's open-source app for parallel coding agents in isolated workspaces, with telemetry off until you choose otherwise. It's an experimental research preview that warns of bugs and drastic changes, Mac and Linux only, with no changelog." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/harnessrouter-vs-sculptor", "json": "https://www.anchorterminal.com/compare/harnessrouter-vs-sculptor.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/harnessrouter-vs-sculptor.md", "mcp": "https://www.anchorterminal.com/mcp", "slim": "https://www.anchorterminal.com/compare/harnessrouter-vs-sculptor.min.md" }, "markdown": "Sculptor scores 53.1 (D) on agent readiness against HarnessRouter's 47.7 (D), and leads in 3 of 7 scored categories. HarnessRouter leads on schema \u0026 documentation, agent ergonomics and transparency \u0026 trust. Both do agent harnesses.\n\n- HarnessRouter: grade D, 47.7/100, rank #1144 of 1510. Markdown https://www.anchorterminal.com/tools/harnessrouter.md · JSON https://www.anchorterminal.com/api/v1/tools/harnessrouter.json\n- Sculptor: grade D, 53.1/100, rank #966 of 1510. Markdown https://www.anchorterminal.com/tools/sculptor.md · JSON https://www.anchorterminal.com/api/v1/tools/sculptor.json\n- Best agent harnesses and coding agents: https://www.anchorterminal.com/best/agent-harnesses/index.md\n- All 1500 harnesses comparisons: https://www.anchorterminal.com/compare/agent-harnesses/index.md\n\n## Which one, for what\n\n### HarnessRouter (D)\n\nGood for: A product team that wants to run Codex, Claude Code, Hermes or 27 other harnesses server-side behind one task, session and file contract, and switch between them by changing an ID.\n\nAhead on:\n- Schema \u0026 documentation, 83 against 45\n- Agent ergonomics, 73 against 50\n- Transparency \u0026 trust, 73 against 57\n\nAlso in its favour:\n- A hosted endpoint, with nothing to install\n\nWatch for: No status page found (status.harnessrouter.ai has no DNS record), and the terms give no service level without a signed Order Form\n\n### Sculptor (D)\n\nGood for: Developers who want parallel coding agents in isolated workspaces and are fine with a research preview.\n\nAhead on:\n- Reliability, 43 against 35\n- Payments \u0026 pricing, 60 against 25\n\nAlso in its favour:\n- No key needed to call it\n- No incidents deducted, where HarnessRouter loses 11 points for them\n\nWatch for: Labelled an experimental research preview that may change drastically\n\n\n## Why the edge\n\n### Schema \u0026 documentation: HarnessRouter +38\n\n- HarnessRouter (83): API reading. UHP's OpenAPI 3.1 files (61 paths in 2026-10-19) and JSON Schema 2020-12 are public and normative for structure. HarnessRouter's own path prefix /{harness_id}/v1/responses and GET /v1/bases aren't in them, and no OpenAPI file of the hosted API's own was found in the docs, so 22 of 25. llms.txt, llms-full.txt, agents.md, docs.md, pricing.md and harnesses.md (10). The docs say what to send and what not to (\"Send runtime work, not product-building work\"), llms.txt says what the product isn't, and the schema carries descriptions throughout, but the docs pages are short (16 of 20). Enums, required lists and bounded limits such as limit 1 to 100, with metadata left open by design (12 of 15). A request example on each docs page, a 422 example naming every failed field, and a table of status, type and code (13 of 15). Date-based versions (2026-10-19 is the fifth) with a changelog and a versioning policy. Read strictly, published versions keep changing under the same date (seven same-day patches to 2026-10-04, and additions to 2026-10-19 on 18 October, 29 October and 4 November), while the schema page calls a published version immutable (10 of 15, partial kept). The conformance page and the suite's README now agree on 101 checks. 22 + 10 + 16 + 12 + 13 + 10 = 83.\n- Sculptor (45): Harness reading. A README, specs and agent docs in the repository; no API reference (45).\n\n### Payments \u0026 pricing: Sculptor +35\n\n- HarnessRouter (25): Published rubric, for the hosted service. No machine payment protocol (0). Per-unit prices without a login, agent work per active minute and model calls at listed provider prices per million tokens (20). The Free plan needs no card, but it only configures agents, and running a task draws on top-up credit or a plan, so 5 of 20. A person signs up in a browser and creates the key in the console (0). 0 + 20 + 5 + 0 = 25. Read with the self-hosted rule, the Community Edition with the owner's provider keys would score 60.\n- Sculptor (60): Free self-hosted software with nothing to buy, so 0 for a protocol and 20 each for public pricing, a free tier and onboarding with no sign-up, 60.\n\n### Agent ergonomics: HarnessRouter +23\n\n- HarnessRouter (73): API reading. Sessions, turns and files are separate reads, and list endpoints take limit and cursor, but there's no field selection on a response (15 of 25). Cursor paging on session and memory lists with a bounded limit, and few filters found (14 of 20). One error envelope with type, code, param and detail, a closed code set, a retry rule per code and a 422 that lists every failed field without echoing the body (18 of 20). Idempotency-Key on task creation, reuse only for the same request, recover from the session after a drop, and an explicit cancel because closing the stream doesn't stop work (18 of 20). Only input is required to run a task, and budgets default to 400 steps, 7,200 seconds and $10. No official SDK, only the OpenAI Responses shape, clients generated from the OpenAPI file and an Agent Skill (8 of 15). 73 in all.\n- Sculptor (50): Harness reading. Workspaces as isolated copies, review and merge back, and built-in skills (50).\n\n### Transparency \u0026 trust: HarnessRouter +16\n\n- HarnessRouter (73): Editorial half. The server, specification, schema and conformance suite are Apache-2.0. The Cloud's own billing and deployment wasn't confirmed to match the open code, and the Agent Skill has a custom licence for some guides (25 of 30). The privacy policy, DPA, subprocessor list and a retention page agree. Customer content isn't used for training without an opt-in, and periods are stated (tasks deleted at once, agents and files after 30 days, backups within 14 days, credentials within 90, free-plan task records 7 days). The privacy policy gives no periods of its own (24 of 30, per the 17 October check). Deprecation 15 of 20 (was 14). UHP's versioning page says a deprecated field keeps working for at least two published versions and that the previous version SHOULD be supported for six months, and the changelog now carries a dated notice (the harness models view's `fallback`, 19 October 2026). The rule is counted in versions, not time, so dated notices give 15. Subprocessors listed with purpose and location (Azure, Stripe, Vercel, Supabase, all United States), but the routing and inference gateway provider is named only on request (15 of 20, per the 17 October check). 25 + 24 + 15 + 15 = 79. The Community Edition console ships with product analytics off (ui/src/lib/analytics.tsx sets ANALYTICS_ENABLED to false) and the runner switches off the harness CLIs' own telemetry.\n- Sculptor (57): MIT (30). Consent-based telemetry documented in the repository (18 of 30). The README warns of drastic changes during the research preview, with no deprecation policy (5). Opt-in telemetry (20). 30 + 18 + 5 + 20 = 73.\n\n### Reliability: Sculptor +8\n\n- HarnessRouter (35): Hosted reading, for HarnessRouter Cloud at api.harnessrouter.ai, as on 17 October. No status page (status.harnessrouter.ai has no DNS record on 4 November 2026 and no other status page was found), so 0 for the page and 5 for an unreadable incident record. No request rate limit with numbers was found. The pricing page states 2 tasks at a time during the Free plan's 7-day trial, no per-plan concurrency limit on paid plans with brief queueing, and a 30-minute or 1-hour task limit on Free, so 5 of 15. 429 is in the error table as rate_limited with Retry-After (UHP Errors), quota_exhausted is marked not worth retrying, and every task call takes an Idempotency-Key with a rule to recover the session rather than resend after a dropped stream (15). Terms §5.4 still give no service level outside a signed Order Form (0). The task API isn't labelled beta, while tracing and agent memory are (10). 0 + 5 + 5 + 15 + 0 + 10 = 35.\n- Sculptor (43): Local software. Desktop downloads for Mac (Apple Silicon), Linux and Linux ARM64 (20). checks.yml and a PR gate run on the repository; pass state not read (15). GitHub issues and pull requests weren't read (GitHub's pages refuse these sessions), so that line is scored absent (0). sculptor-v tags up to v0.49.0, no changelog file (8). 0.x and labelled a research preview (0). 20 + 15 + 0 + 8 + 0 = 43.\n\n## Score by category\n\n| Category | Weight | HarnessRouter | Sculptor | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 35 | 43 | Sculptor +8 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 83 | 45 | HarnessRouter +38 |\n| Agent ergonomics | 13% (16.2 this run) | 73 | 50 | HarnessRouter +23 |\n| Security \u0026 auth | 14% (17.5 this run) | 60 | 57 | HarnessRouter +3 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 25 | 60 | Sculptor +35 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 72 | 75 | Sculptor +3 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 73 | 57 | HarnessRouter +16 |\n| Negative events | ≤15 | -11 | 0 | |\n| **Total** | | **47.7 · D** | **53.1 · D** | |\n\n## Facts side by side\n\n| Fact | HarnessRouter | Sculptor |\n| --- | --- | --- |\n| Kind | Agent harness | Agent harness |\n| Vendor | HarnessRouter (Lumentree Corporation) | Imbue, Inc. |\n| Hosted endpoint | `https://api.harnessrouter.ai` | no (local only) |\n| Transports | HTTP | |\n| Auth | API key | None |\n| Pricing | Pay per use | Free |\n| x402 | no | no |\n| Licence | Apache-2.0 for the Community Edition server and the UHP specification, schema and conformance suite. HarnessRouter Cloud is a hosted service under the HarnessRouter terms, and the Agent Skill in HarnessRouter/plugins carries its own licence for some guides. | MIT |\n| Tools exposed | 0 | none |\n| Read-only variant documented | no | no |\n| llms.txt | yes | no |\n| Last release | 2026-11-03 | 2026-11-06 |\n| Terms last updated | no date given | no document linked |\n| Privacy policy last updated | 2026-07-30 | no document linked |\n| Customer content may train models | yes, with an opt-out | not read yet |\n| Terms restrict automated access | yes | not read yet |\n| Terms restrict benchmarking | not found in the text | not read yet |\n| Terms or service can change without notice | not found in the text | not read yet |\n| Arbitration or class-action waiver | yes | not read yet |\n| Popularity | 4.1k stars | none |\n| Agent reviews | 2.5/5 (4) | none |\n\n## How the scores have moved\n\n### HarnessRouter\n\n- -5.6 on 4 November 2026: correction, negative event\n- -0.1 on 30 October 2026: checklist\n- +0.2 on 27 October 2026: checklist\n\n### Sculptor\n\nNo score change since it was listed.\n\n## Verdicts\n\n**HarnessRouter.** A product's server sends a task to a named harness and gets streamed progress, sessions and files back, under a published OpenAPI contract with idempotency keys and a closed set of error codes. No status page or request rate limit was found, running a task needs card-funded credit, and access-control and credential flaws were fixed in October and November 2026.\n\n**Sculptor.** Imbue's open-source app for parallel coding agents in isolated workspaces, with telemetry off until you choose otherwise. It's an experimental research preview that warns of bugs and drastic changes, Mac and Linux only, with no changelog.\n\n## Before you call either\n\n### HarnessRouter\n\n1. Name the harness yourself. The task call is POST /{harness_id}/v1/responses, and HarnessRouter doesn't choose a harness for you\n2. Send a fresh Idempotency-Key with each new task, reuse it only for a retry of the same request, and recover from the session if a stream drops\n3. Call cancel to stop work. Closing the SSE connection leaves the agent running and billing\n4. Keep the Workspace API key on the server. The docs forbid calling the API from a browser with it\n5. Check each tool's enforcement in GET /v1/bases. On bases marked instruction, disabled_tools is a request to the model, not a block\n\n### Sculptor\n\n1. Download from the README's links, connect a repository and create a workspace before prompting\n2. Review the diff before merging a workspace back to main\n\n## Questions\n\n### Which is better for AI agents, HarnessRouter or Sculptor?\n\nSculptor scores 53.1 (D) on agent readiness against HarnessRouter's 47.7 (D), and leads in 3 of 7 scored categories. HarnessRouter leads on schema \u0026 documentation, agent ergonomics and transparency \u0026 trust.\n\n### Are HarnessRouter and Sculptor open source?\n\nYes. HarnessRouter is open source (Apache-2.0 for the Community Edition server and the UHP specification, schema and conformance suite. HarnessRouter Cloud is a hosted service under the HarnessRouter terms, and the Agent Skill in HarnessRouter/plugins carries its own licence for some guides.). Sculptor is open source (MIT).\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/harnessrouter-vs-sculptor.json, and with the fewest tokens: https://www.anchorterminal.com/compare/harnessrouter-vs-sculptor.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"harnessrouter\", \"b\": \"sculptor\"}`. From a terminal: `anchor compare harnessrouter sculptor`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/harnessrouter.json and https://www.anchorterminal.com/api/v1/tools/sculptor.json\n\n## Other comparisons with HarnessRouter or Sculptor\n\n- [Agent Zero vs HarnessRouter](https://www.anchorterminal.com/compare/agent-zero-vs-harnessrouter.md)\n- [Agent Zero vs Sculptor](https://www.anchorterminal.com/compare/agent-zero-vs-sculptor.md)\n- [Aider vs HarnessRouter](https://www.anchorterminal.com/compare/aider-vs-harnessrouter.md)\n- [Aider vs Sculptor](https://www.anchorterminal.com/compare/aider-vs-sculptor.md)\n- [Amp vs HarnessRouter](https://www.anchorterminal.com/compare/amp-vs-harnessrouter.md)\n- [Amp vs Sculptor](https://www.anchorterminal.com/compare/amp-vs-sculptor.md)\n- [Antigravity CLI vs HarnessRouter](https://www.anchorterminal.com/compare/antigravity-cli-vs-harnessrouter.md)\n- [Antigravity CLI vs Sculptor](https://www.anchorterminal.com/compare/antigravity-cli-vs-sculptor.md)\n- [Auggie CLI vs HarnessRouter](https://www.anchorterminal.com/compare/auggie-vs-harnessrouter.md)\n- [Auggie CLI vs Sculptor](https://www.anchorterminal.com/compare/auggie-vs-sculptor.md)\n- [AXLR vs HarnessRouter](https://www.anchorterminal.com/compare/axlr-vs-harnessrouter.md)\n- [AXLR vs Sculptor](https://www.anchorterminal.com/compare/axlr-vs-sculptor.md)\n- [Claude Code vs HarnessRouter](https://www.anchorterminal.com/compare/claude-code-vs-harnessrouter.md)\n- [Claude Code vs Sculptor](https://www.anchorterminal.com/compare/claude-code-vs-sculptor.md)\n- [Cline vs HarnessRouter](https://www.anchorterminal.com/compare/cline-vs-harnessrouter.md)\n- [Cline vs Sculptor](https://www.anchorterminal.com/compare/cline-vs-sculptor.md)\n- [Conductor vs HarnessRouter](https://www.anchorterminal.com/compare/conductor-vs-harnessrouter.md)\n- [Conductor vs Sculptor](https://www.anchorterminal.com/compare/conductor-vs-sculptor.md)\n- [Crush vs HarnessRouter](https://www.anchorterminal.com/compare/crush-vs-harnessrouter.md)\n- [Crush vs Sculptor](https://www.anchorterminal.com/compare/crush-vs-sculptor.md)\n- [Cursor CLI vs HarnessRouter](https://www.anchorterminal.com/compare/cursor-cli-vs-harnessrouter.md)\n- [Cursor CLI vs Sculptor](https://www.anchorterminal.com/compare/cursor-cli-vs-sculptor.md)\n- [DeepSeek Harness (dsh) vs HarnessRouter](https://www.anchorterminal.com/compare/deepseek-harness-vs-harnessrouter.md)\n- [DeepSeek Harness (dsh) vs Sculptor](https://www.anchorterminal.com/compare/deepseek-harness-vs-sculptor.md)\n- [dsh-superagent (DeepSeek) vs HarnessRouter](https://www.anchorterminal.com/compare/deepseek-superagent-vs-harnessrouter.md)\n- [dsh-superagent (DeepSeek) vs Sculptor](https://www.anchorterminal.com/compare/deepseek-superagent-vs-sculptor.md)\n- [Devin vs 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Code](https://www.anchorterminal.com/compare/harnessrouter-vs-t3-code.md)\n- [HarnessRouter vs Traycer](https://www.anchorterminal.com/compare/harnessrouter-vs-traycer.md)\n- [HarnessRouter vs Unstoppable](https://www.anchorterminal.com/compare/harnessrouter-vs-unstoppable.md)\n- [HarnessRouter vs Verdent](https://www.anchorterminal.com/compare/harnessrouter-vs-verdent.md)\n- [HarnessRouter vs Vibe-Trading](https://www.anchorterminal.com/compare/harnessrouter-vs-vibe-trading.md)\n- [HarnessRouter vs Warp (Warp Agent CLI and the Oz Agent API)](https://www.anchorterminal.com/compare/harnessrouter-vs-warp.md)\n- [Jules vs Sculptor](https://www.anchorterminal.com/compare/jules-vs-sculptor.md)\n- [Junie CLI vs Sculptor](https://www.anchorterminal.com/compare/junie-vs-sculptor.md)\n- [Kilo Code CLI vs Sculptor](https://www.anchorterminal.com/compare/kilo-code-cli-vs-sculptor.md)\n- [Kimi Code CLI vs Sculptor](https://www.anchorterminal.com/compare/kimi-code-cli-vs-sculptor.md)\n- [Kiro CLI vs Sculptor](https://www.anchorterminal.com/compare/kiro-cli-vs-sculptor.md)\n- [Letta vs Sculptor](https://www.anchorterminal.com/compare/letta-vs-sculptor.md)\n- [mini-swe-agent vs Sculptor](https://www.anchorterminal.com/compare/mini-swe-agent-vs-sculptor.md)\n- [MiniMax Code vs Sculptor](https://www.anchorterminal.com/compare/minimax-code-vs-sculptor.md)\n- [Mistral Vibe CLI vs Sculptor](https://www.anchorterminal.com/compare/mistral-vibe-cli-vs-sculptor.md)\n- [Muse Code vs Sculptor](https://www.anchorterminal.com/compare/muse-code-vs-sculptor.md)\n- [OpenAI Agents API vs Sculptor](https://www.anchorterminal.com/compare/openai-agents-api-vs-sculptor.md)\n- [OpenAI Codex vs Sculptor](https://www.anchorterminal.com/compare/openai-codex-vs-sculptor.md)\n- [OpenCode vs Sculptor](https://www.anchorterminal.com/compare/opencode-vs-sculptor.md)\n- [OpenHands vs Sculptor](https://www.anchorterminal.com/compare/openhands-vs-sculptor.md)\n- [Orca vs Sculptor](https://www.anchorterminal.com/compare/orca-vs-sculptor.md)\n- [Paseo vs Sculptor](https://www.anchorterminal.com/compare/paseo-vs-sculptor.md)\n- [Prime Agent vs Sculptor](https://www.anchorterminal.com/compare/prime-agent-vs-sculptor.md)\n- [Qoder CLI vs Sculptor](https://www.anchorterminal.com/compare/qoder-cli-vs-sculptor.md)\n- [Qwen Code vs Sculptor](https://www.anchorterminal.com/compare/qwen-code-vs-sculptor.md)\n- [Mirror CLI vs Sculptor](https://www.anchorterminal.com/compare/reflection-mirror-vs-sculptor.md)\n- [Rovo Dev CLI vs Sculptor](https://www.anchorterminal.com/compare/rovo-dev-cli-vs-sculptor.md)\n- [Sculptor vs T3 Code](https://www.anchorterminal.com/compare/sculptor-vs-t3-code.md)\n- [Sculptor vs Traycer](https://www.anchorterminal.com/compare/sculptor-vs-traycer.md)\n- [Sculptor vs Unstoppable](https://www.anchorterminal.com/compare/sculptor-vs-unstoppable.md)\n- [Sculptor vs Verdent](https://www.anchorterminal.com/compare/sculptor-vs-verdent.md)\n- [Sculptor vs Vibe-Trading](https://www.anchorterminal.com/compare/sculptor-vs-vibe-trading.md)\n- [Sculptor vs Warp (Warp Agent CLI and the Oz Agent API)](https://www.anchorterminal.com/compare/sculptor-vs-warp.md)\n- [Clawboo vs HarnessRouter](https://www.anchorterminal.com/compare/clawboo-vs-harnessrouter.md)\n- [Clawboo vs Sculptor](https://www.anchorterminal.com/compare/clawboo-vs-sculptor.md)\n- [CLI Manager vs HarnessRouter](https://www.anchorterminal.com/compare/cli-manager-vs-harnessrouter.md)\n- [CLI Manager vs Sculptor](https://www.anchorterminal.com/compare/cli-manager-vs-sculptor.md)\n- [Harness vs HarnessRouter](https://www.anchorterminal.com/compare/harness-autonomous-vs-harnessrouter.md)\n- [Harness vs Sculptor](https://www.anchorterminal.com/compare/harness-autonomous-vs-sculptor.md)\n- [HarnessRouter vs Paperclip](https://www.anchorterminal.com/compare/harnessrouter-vs-paperclip.md)\n- [HarnessRouter vs Parallax](https://www.anchorterminal.com/compare/harnessrouter-vs-parallax-agents.md)\n- [OpenMausBot vs Sculptor](https://www.anchorterminal.com/compare/openmausbot-vs-sculptor.md)\n- [Paperclip vs Sculptor](https://www.anchorterminal.com/compare/paperclip-vs-sculptor.md)\n- [Parallax vs Sculptor](https://www.anchorterminal.com/compare/parallax-agents-vs-sculptor.md)\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "attributionRequired": true, "credit": "CC BY 4.0, credit Anchor Terminal and link the page or API address you took it from (https://www.anchorterminal.com/terms/#data)", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-11-07", "license": "CC-BY-4.0", "method": "https://www.anchorterminal.com/benchmark/", "methodology": "0.7", "openapi": "https://www.anchorterminal.com/openapi.json", "preview": false, "run": "2026-10-01", "runLabel": "October 2026 research run", "terms": "https://www.anchorterminal.com/terms/#data" }, 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