{ "data": { "a": { "slug": "agent-tree", "name": "Agent Tree", "vendor": "Mike Pollow (Digitalroots)", "vendorUrl": "https://github.com/MikeGT4/agent-tree", "kind": "framework", "category": "agent-observability", "summary": "Agent Tree is an MIT-licensed Claude Code plugin that shows a session's sub-agents as a live tree in a terminal side pane, with context, cost and usage limits, and lets the person stop, message or re-model running sub-agents.", "url": "https://www.anchorterminal.com/tools/agent-tree", "markdownUrl": "https://www.anchorterminal.com/tools/agent-tree.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/agent-tree.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/agent-tree.json", "dns": "agent-tree.grade.anchorterminal.com", "repo": "https://github.com/MikeGT4/agent-tree", "license": "MIT (Copyright (c) 2026 Mike Pollow, Digitalroots)", "transports": [], "packages": [], "auth": "none", "authNotes": "No account, key or login of its own. It installs through Claude Code's plugin manager from the author's own marketplace (the GitHub repository) and runs inside Claude Code with that session's permissions.", "pricing": "free", "pricingNotes": "Free under the MIT licence, with nothing to buy. Model usage stays on the person's Claude plan or API key; switching a sub-agent's model or effort in the pane changes what those calls cost.", "priceSummary": "Free · OSS", "where": "library", "x402": { "level": "no", "evidence": "Local software with nothing to buy. No x402, MPP or L402 in the repository, read on 2026-11-01.", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": null, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-11-01" }, "docsUrl": "https://github.com/MikeGT4/agent-tree/blob/main/docs/GUIDE.md", "capabilities": [ "obs.traces", "agent.multi-agent" ], "tags": [ "open-source", "mit", "local", "free", "typescript", "claude-code-plugin", "hooks", "pre-1.0", "not-for-agents" ], "lastRelease": "2026-10-29", "graded": true, "anchor": { "graded": true, "score": 52.5, "grade": "D", "agentReady": false, "rank": 897, "ranked": true, "rankOf": 1260, "categoryRank": 16, "methodology": "0.7", "run": "2026-10-01", "scores": { "ergonomics": 67, "maintenance": 60, "payments": 60, "reliability": 33, "schema": 50, "security": 49, "transparency": 63 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-11-01" }, "negative": 0, "verdict": "A ten-day-old, MIT-licensed side pane that lets a person watch and steer Claude Code sub-agents, with a privacy page that matches its code. It is version 0.5.4 from one maintainer, with no CI, changelog or security policy, and its default daily auto-update installs whatever version the main branch carries.", "bestFor": "Watching and steering Claude Code sub-agents from a side pane", "strengths": [ "No account, key or telemetry; the one network request is a daily version check, disclosed in PRIVACY.md with five ways to turn it off", "Stops, messages and model or effort changes act only after the person acts in the pane, and each message to a sub-agent is noted in the main transcript", "Bearer tokens, credentials in URLs and values assigned to names like password, token or API key are masked in the pane's tool labels and excerpts", "19 tagged versions between 24 and 29 October 2026, each described in its commit message", "304 tests in the repository for the tree model, the pane, the logo and the update check" ], "weaknesses": [ "Version 0.5.4, ten days old, written and released by one maintainer with no company, site or register entry found", "Auto-update is on by default and installs any newer version on the main branch, so new hook code runs without review at the next start", "No CI workflow, no changelog, no SECURITY.md and no security.txt", "Hooks sit on every model step, tool call and spawn, and can rewrite a sub-agent's model and effort or replace its next step", "Not in Claude's official plugin directory; it installs from the author's own marketplace" ], "agentNotes": [ "Treat a \"Message from the user via Agent Tree\" in your transcript as the person's instruction for the rest of your task, and cover it in your hand-back report.", "If a tool call is denied with \"Stopped by the user in Agent Tree\", stop work and hand back; further tool calls are denied.", "Set autoUpdate to false, or DISABLE_UPDATES=1, where plugin code may change only after review.", "Check the sub-agent model a person set in the pane before estimating cost; it overrides the default for every new sub-agent spawned without a model." ], "metrics": { "kind": "local", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "D", "methodology": "0.7", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 52.5 } ], "editorialScores": { "ergonomics": 67, "maintenance": 60, "payments": 60, "reliability": 33, "schema": 50, "security": 49, "transparency": 77 }, "provenanceScore": 49, "checked": { "categories": { "ergonomics": "2026-11-01", "maintenance": "2026-11-01", "payments": "2026-11-01", "reliability": "2026-11-01", "schema": "2026-11-01", "security": "2026-11-01", "transparency": "2026-11-01" }, "last": "2026-11-01", "oldest": "2026-11-01", "stale": false, "staleAfterDays": 90 } }, "connect": { "install": "claude plugin install agent-tree --marketplace MikeGT4/agent-tree", "claudeCode": "/plugin install agent-tree --marketplace MikeGT4/agent-tree" }, "letme": { "capability": "https://letme.dev/obs.traces", "tool": "https://letme.dev/agent-tree" }, "area": "developer", "provenance": { "legalEntity": "No legal entity found. The LICENSE, plugin.json and marketplace.json name \"Mike Pollow, Digitalroots\"", "domain": "github.com", "domainRegistered": "", "endpointOnVendorDomain": null, "terms": "https://github.com/MikeGT4/agent-tree/blob/main/LICENSE", "privacy": "https://github.com/MikeGT4/agent-tree/blob/main/PRIVACY.md", "statusPage": "", "changelog": "", "securityTxt": "none", "checked": "2026-11-01", "notes": [ "The LICENSE reads Copyright (c) 2026 Mike Pollow, Digitalroots, and the plugin and marketplace manifests name the same author. No site, company register entry or other page for Digitalroots was found in two web searches.", "PRIVACY.md is the plugin's privacyPolicyUrl in plugin.json. The MIT licence stands in for terms.", "No SECURITY.md in the repository and no .github directory. github.com and api.github.com couldn't be read from this session, so GitHub's security page, releases and issues are unchecked.", "Local software, so there is no vendor endpoint or status page. No changelog file; versions are described in commit messages and tags.", "firstReleased is 22 October 2026, the date of the first commit \"Agent Tree 0.1.0\" in a bare clone. The earliest tag, v0.2.2, is 24 October. A news roundup on emergent.sh of 27 October gives the launch as 26 October." ], "score": 49 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/agent-tree.json" }, "answer": "Braintrust API + MCP scores 61.1 (C) on agent readiness against Agent Tree's 52.5 (D), and leads in 5 of 7 scored categories. Agent Tree leads on payments \u0026 pricing.", "b": { "slug": "braintrust", "name": "Braintrust API + MCP", "vendor": "Braintrust", "vendorUrl": "https://www.braintrust.dev", "kind": "http-api", "category": "agent-observability", "summary": "Hosted tracing, logging and evaluation for LLM apps and agents, with experiments, datasets, prompts, online scorers and a model gateway.", "url": "https://www.anchorterminal.com/tools/braintrust", "markdownUrl": "https://www.anchorterminal.com/tools/braintrust.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/braintrust.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/braintrust.json", "dns": "braintrust.grade.anchorterminal.com", "repo": "https://github.com/braintrustdata/braintrust-sdk-javascript", "license": "Apache-2.0 (SDKs only, platform closed source)", "transports": [ "http", "streamable-http" ], "remoteUrl": "https://api.braintrust.dev/v1", "packages": [ { "registry": "npm", "name": "braintrust" }, { "registry": "pypi", "name": "braintrust" } ], "auth": "mixed", "authNotes": "REST API and SDKs take an org API key as a Bearer token (BRAINTRUST_API_KEY). The hosted MCP server accepts OAuth 2.0 with dynamic client registration or the same API key, and acts with the permissions of the key's account. EU and self-hosted data planes have their own API and MCP URLs.", "pricing": "freemium", "pricingNotes": "Starter is free with no card, unlimited users, 1 GB processed data and 10,000 scores a month, 14-day retention and $10 of model credit. Overage $4 a GB and $2.50 per 1,000 scores. Pro $249 a month with 5 GB, 50,000 scores, $100 of model credit and 30-day retention, then $3 a GB, $1.50 per 1,000 scores and $0.50 a GB a month for longer retention. Qualifying startups can get Pro free for 6 to 12 months. Enterprise is custom and adds on-prem or hybrid deployment, a BAA and SLAs (https://www.braintrust.dev/pricing).", "priceSummary": "$249 / mo", "where": "hosted", "x402": { "level": "no", "evidence": "No x402 support in docs or pricing (checked 2026-09-30).", "endpoints": [] }, "toolCount": 42, "popularity": { "githubStars": null, "npmWeekly": 2018529, "pypiWeekly": 1701906, "asOf": "2026-09-30" }, "docsUrl": "https://www.braintrust.dev/docs", "llmsTxt": "https://www.braintrust.dev/docs/llms.txt", "openapi": "https://www.braintrust.dev/docs/openapi.json", "registryName": "io.github.braintrustdata/braintrust", "capabilities": [ "obs.traces", "obs.evals", "obs.prompts", "obs.gateway", "obs.datasets" ], "tags": [ "hosted", "freemium", "no-card", "mcp", "llms-txt", "openapi", "python", "typescript", "closed-source", "enterprise" ], "lastRelease": "2026-10-01", "graded": true, "anchor": { "graded": true, "score": 61.1, "grade": "C", "agentReady": false, "rank": 567, "ranked": true, "rankOf": 1260, "categoryRank": 13, "methodology": "0.7", "run": "2026-10-01", "scores": { "ergonomics": 66, "maintenance": 85, "payments": 40, "reliability": 61, "schema": 85, "security": 58, "transparency": 66 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-01" }, "negative": -4, "negativeNotes": [ "Fixed 2026-07-16. The Python SDK's LiteLLM instrumentation in versions 0.2.0 to 0.27.x wrote provider credentials into trace metadata, among them API keys, `Authorization` headers, Azure tokens and AWS access and secret keys. Fixed in 0.28.0 with a metadata allowlist, and a knowledge-base page tells users to rotate. It reads as an advisory but isn't filed as one and carries no date. -2 after decay (https://braintrust.dev/docs/kb/litellm-instrumentation-may-record-provider-credentials.md)", "Fixed 2026-07-16. The TypeScript SDK from 0.4.0 to 3.23.0 recorded API keys passed to the Claude Agent SDK through `options.apiKey` into trace metadata. The 3.23.1 changelog line calls the fix \"Clean up span metadata\", and only the knowledge-base page explains the exposure and asks for rotation. -2 after decay (https://braintrust.dev/docs/kb/claude-agent-sdk-api-keys-recorded-in-trace-metadata.md)" ], "verdict": "OpenAPI 3.0.3 spec with 75 paths, 429 and `Retry-After` declared on 154 operations. Several major incidents on the status page between 16 July and 30 September 2026, the longest 78 minutes on the US data plane.", "bestFor": "Teams that want evals, datasets and production logs in one hosted product and will drive it from a coding agent through MCP or SQL.", "strengths": [ "OpenAPI 3.0.3 spec with 75 paths, 429 and `Retry-After` declared on 154 operations", "Hosted MCP server with 42 tools, OAuth 2.0 or API key, and `sql_query` that hands results over 1 MB back as a signed URL", "Service tokens can be scoped to single projects through permission groups on every plan", "Starter is free with no card, unlimited users and published per-GB and per-score overage prices", "TypeScript and Python SDKs both released on 2026-10-01, with 34 releases between them since 16 July" ], "weaknesses": [ "Several major incidents on the status page between 16 July and 30 September 2026, the longest 78 minutes on the US data plane", "Python SDK up to 0.27.x and TypeScript SDK up to 3.23.0 recorded provider credentials in trace metadata, fixed on 2026-07-16 without a formal advisory", "All 42 MCP tools load by default and write tools act with the full permissions of the signed-in account", "Only BTQL has a published rate limit, about 20 queries a minute on Starter and Pro", "Privacy notice dates from September 2023 and excludes customer data. Starter keeps data for 14 days" ], "agentNotes": [ "Connect a project-scoped service token rather than a personal key, because MCP write tools act with the key's full permissions", "Set the client to confirm MCP write tools such as `edit_dataset_rows` and `create_threshold_alert`. The server has no read-only mode", "Cache `sql_query` results. Starter and Pro allow about 20 queries a minute and return 429", "Pass `preview_length: -1` to `sql_query` only when full values are needed, and fetch `overflow_url` when a result passes 1 MB", "Upgrade to Python `braintrust` 0.28.0 or TypeScript 3.23.1 or later and rotate any provider keys traced before July 2026" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 2, "avgRating": 3, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "C", "methodology": "0.7", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 61.1 } ], "editorialScores": { "ergonomics": 66, "maintenance": 85, "payments": 40, "reliability": 61, "schema": 85, "security": 58, "transparency": 50 }, "provenanceScore": 82, "checked": { "categories": { "ergonomics": "2026-10-01", "maintenance": "2026-10-01", "payments": "2026-10-01", "reliability": "2026-10-01", "schema": "2026-10-01", "security": "2026-10-01", "transparency": "2026-10-01" }, "last": "2026-10-01", "lastMoved": "2026-10-08", "oldest": "2026-10-01", "stale": false, "staleAfterDays": 90 } }, "connect": { "http": "curl https://api.braintrust.dev/v1/project -H \"Authorization: Bearer $BRAINTRUST_API_KEY\"", "claudeCode": "claude mcp add --transport http braintrust https://api.braintrust.dev/mcp", "config": { "mcpServers": { "braintrust": { "headers": { "Authorization": "Bearer ${BRAINTRUST_API_KEY}" }, "type": "http", "url": "https://api.braintrust.dev/mcp" } } } }, "letme": { "capability": "https://letme.dev/obs.traces", "tool": "https://letme.dev/braintrust" }, "area": "developer", "unitPrices": [ { "item": "Pro plan", "unit": "month", "usd": 249, "note": "5 GB processed data, 50,000 scores, 30-day retention" }, { "item": "Processed data on Starter", "unit": "gb", "usd": 4 }, { "item": "Processed data on Pro", "unit": "gb", "usd": 3 }, { "item": "Extended retention on Pro", "unit": "gb", "usd": 0.5, "note": "per GB a month beyond 30 days" } ], "provenance": { "legalEntity": "Braintrust Data, Inc.", "domain": "braintrust.dev", "domainRegistered": "2021-03-25", "endpointOnVendorDomain": true, "terms": "https://www.braintrust.dev/legal/terms-of-service", "privacy": "https://www.braintrust.dev/legal/privacy-policy", "statusPage": "https://status.braintrust.dev", "changelog": "https://www.braintrust.dev/docs/changelog", "securityTxt": "none", "checked": "2026-09-30", "score": 82 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/braintrust.json", "live": { "slug": "braintrust", "probe": { "target": "https://api.braintrust.dev/v1", "method": "get", "lastAt": "2026-11-02T00:55:57.684875007Z", "lastOk": true, "lastStatus": 200, "lastMs": 186, "authRequired": false, "uptime24h": 100, "uptime30d": 99.91, "p50ms24h": 111, "p95ms24h": 193, "samples24h": 249, "samples30d": 7898, "days": [ { "date": "2026-10-02", "probes": 248, "ok": 248 }, { "date": "2026-10-03", "probes": 271, "ok": 271 }, { "date": "2026-10-04", "probes": 272, "ok": 271 }, { "date": "2026-10-05", "probes": 272, "ok": 271 }, { "date": "2026-10-06", "probes": 272, "ok": 271 }, { "date": "2026-10-07", "probes": 272, "ok": 272 }, { "date": "2026-10-08", "probes": 268, "ok": 268 }, { "date": "2026-10-09", "probes": 250, "ok": 249 }, { "date": "2026-10-10", "probes": 247, "ok": 247 }, { "date": "2026-10-11", "probes": 247, "ok": 247 }, { "date": "2026-10-12", "probes": 247, "ok": 247 }, { "date": "2026-10-13", "probes": 248, "ok": 248 }, { "date": "2026-10-14", "probes": 249, "ok": 249 }, { "date": "2026-10-15", "probes": 253, "ok": 253 }, { "date": "2026-10-16", "probes": 252, "ok": 252 }, { "date": "2026-10-17", "probes": 253, "ok": 253 }, { "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": 252 }, { "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": 249, "ok": 249 }, { "date": "2026-10-30", "probes": 248, "ok": 247 }, { "date": "2026-10-31", "probes": 251, "ok": 250 }, { "date": "2026-11-01", "probes": 249, "ok": 249 }, { "date": "2026-11-02", "probes": 10, "ok": 10 } ] }, "vendorStatus": { "page": "https://status.braintrust.dev", "indicator": "none", "summary": "All Systems Operational", "checkedAt": "2026-11-02T01:00:22.399740273Z" }, "versions": [ { "registry": "github", "name": "braintrustdata/braintrust-sdk-javascript", "version": "braintrust@3.42.0", "released": "2026-10-29", "seenAt": "2026-11-01T16:47:04.295517387Z" }, { "registry": "mcp-registry", "name": "io.github.braintrustdata/braintrust", "version": "1.0.0", "seenAt": "2026-11-01T16:10:44.053973489Z" }, { "registry": "npm", "name": "braintrust", "version": "3.42.0", "seenAt": "2026-11-01T16:47:03.084982079Z" }, { "registry": "pypi", "name": "braintrust", "version": "0.49.1", "released": "2026-10-30", "seenAt": "2026-11-01T16:47:04.045284788Z" } ], "githubStars": 29, "npmWeekly": 2352052, "pypiWeekly": 1885199, "securityTxt": { "url": "https://braintrust.dev/.well-known/security.txt", "state": "none", "checkedAt": "2026-11-01T15:42:26.444281308Z" }, "llmsTxt": { "url": "https://www.braintrust.dev/docs/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-11-01T15:13:03.767763869Z" }, "domain": { "domain": "braintrust.dev", "registered": "2021-03-25", "source": "https://pubapi.registry.google/rdap/domain/braintrust.dev", "checkedAt": "2026-11-01T14:08:14.780345183Z" }, "pages": [ { "url": "https://www.braintrust.dev/docs/changelog", "kind": "changelog", "status": 200, "checkedAt": "2026-11-01T06:57:37.163711986Z", "changedAt": "2026-11-01T06:57:37.163711986Z", "fingerprint": "ff698fb8883c" }, { "url": "https://www.braintrust.dev/pricing", "kind": "pricing", "status": 200, "checkedAt": "2026-11-01T06:57:43.777253595Z", "changedAt": "2026-10-08T18:26:46.642292163Z", "fingerprint": "5d374bff4552" }, { "url": "https://www.braintrust.dev/legal/privacy-policy", "kind": "privacy", "status": 200, "checkedAt": "2026-11-01T06:57:40.026109472Z", "changedAt": "2026-10-08T18:26:42.432950997Z", "fingerprint": "11f705ad4b2e" }, { "url": "https://www.braintrust.dev/legal/terms-of-service", "kind": "terms", "status": 200, "checkedAt": "2026-11-01T06:57:41.540616884Z", "changedAt": "2026-10-08T18:26:44.659338097Z", "fingerprint": "d1ceea73697f" } ], "github": { "repo": "braintrustdata/braintrust-sdk-javascript", "checkedAt": "2026-10-26T07:15:41.517822378Z", "stars": 29, "archived": false, "issuesEnabled": true, "pushedAt": "2026-10-26T06:59:11Z", "openIssues": 53, "openPRs": 35, "issuesOpened90d": 53, "issuesClosed90d": 65, "prsMerged90d": 214, "ci": { "branch": "main", "runs": 50, "success": 49, "failure": 1, "other": 0, "latest": "success", "latestAt": "2026-10-23T13:51:23Z" }, "advisories": [ { "ghsa": "GHSA-h8xp-g5cq-35xw", "cve": "CVE-2026-85273", "severity": "high", "published": "2026-07-17T18:55:34Z" } ], "replies": { "sampled": 25, "unanswered": 7, "medianDays": 1.3 } }, "updatedAt": "2026-11-02T01:00:22.399740273Z" } }, "edges": [ { "by": 35, "category": "schema", "leads": "braintrust", "name": "Schema \u0026 documentation", "reasons": { "a": "Framework reading, docs a model can follow, as superpowers was read. types/index.d.ts types the pane's state, and plugin.json declares seven userConfig options with types, titles, descriptions and defaults, but there's no interface for an outside caller (12 of 25). README in English and German, a nine-step GUIDE.md and PRIVACY.md, all Markdown in the repository; no llms.txt (10). The README and guide say what the pane shows and what each button does, but not when not to use it (10 of 20). Options are typed, with an enum for the language; the /agent-tree command takes stop, clear, intro and `to \u003cid\u003e \u003ctext\u003e` (8 of 15). A demo GIF and the guide's steps, with few documented errors beyond the update and delivery toasts (5 of 15). Semver tags but no changelog or release notes read (5 of 15). 50 in all.", "b": "OpenAPI 3.0.3 with 75 paths and 234 operations at /docs/openapi.json, pinned and refreshed weekly in the Python SDK repo (25). llms.txt with about 500 entries, every page served as Markdown (10). The MCP docs give a one-line purpose for each of the 42 tools and mark the `test_*` tools as dry runs, but say little about when not to use a tool. The MCP server is closed source, so we read the docs rather than the definitions (13). Typed OpenAPI schemas with pagination parameters and enums, though `sql_query` takes free-form SQL and event payloads are free-form by nature (11). 400, 401, 403, 429 and 500 responses are declared on most operations, but only 4 of 234 operations carry an inline example. The cookbook fills some of the gap (11). Versioned `/v1` API, a monthly product changelog, a data-plane changelog and per-SDK changelogs (15)." }, "scores": { "a": 50, "b": 85 } }, { "by": 28, "category": "reliability", "leads": "braintrust", "name": "Reliability", "reasons": { "a": "Local-package reading, as for superpowers and tokeneconomizer. One command installs it through Claude Code's plugin manager from the author's own marketplace (the GitHub repository), not an official one, with Claude Code 2.1.292 or later stated and 2.1.316 tested (15 of 20). No .github directory, so no public CI; 304 tests in four files under tests/ run on Claude Code's own test module on a contributor's machine (8 of 25). Issues couldn't be read, as github.com was unreachable from this session (5 of 25, unchecked). 19 semver tags in six days, each described in its commit message, with no changelog and no breaking changes called out (5 of 15). Version 0.5.4 (0). 33 in all.", "b": "Statuspage at status.braintrust.dev with component history and 25 incidents since February 2026 (20). The last 90 days hold several majors. A critical run of 504s on the EU data plane on 16 July (about 30 minutes), gateway 5xx incidents on 3 August and 27 to 28 August, control plane 5xxs on 4 September, a 40-minute data-loading failure in the US on 9 September and 78 minutes of elevated errors across the US data plane API on 30 September. Most were short and the gateway is a side product, so 5 rather than 0. The only published limit is about 20 BTQL queries a minute on Starter and Pro. Ingestion and REST limits have no numbers (8). The OpenAPI spec documents 429 with a `Retry-After` header on 154 operations and recommends exponential backoff, the SDKs retry 408, 429 and 5xx, and events written with the same `id` overwrite rather than duplicate (15). Enterprise lists SLAs and guaranteed response times with no published terms (3). API and MCP are GA (10)." }, "scores": { "a": 33, "b": 61 } }, { "by": 25, "category": "maintenance", "leads": "braintrust", "name": "Maintenance \u0026 community", "reasons": { "a": "v0.5.4 tagged on 29 October 2026 and a commit on 31 October (30). 19 tags from v0.2.2 (24 October) to v0.5.4 (29 October), far more than three in 90 days (20). Issue and pull-request replies couldn't be read, as github.com was unreachable (5 of 25). Not in Claude's official plugin directory; claude.com/plugins/agent-tree answered 404 (0). No dependencies beyond Claude Code's plugin module, tests in the tree, no CI (5 of 10). 60 in all.", "b": "TypeScript SDK `braintrust` 3.36.0 and Python SDK 0.44.0, both on 2026-10-01 (30). 15 TypeScript and 19 Python releases since 16 July (20). The product changelog lists dozens of September entries and both SDK repositories take outside contributions credited in the changelog. We didn't load issue reply times (12). Official SDKs in six languages, current (15). Public CI (`checks.yaml`), integration tests, Dependabot and a weekly dependency job. We didn't confirm the pass state (8)." }, "scores": { "a": 60, "b": 85 } }, { "by": 20, "category": "payments", "leads": "agent-tree", "name": "Payments \u0026 pricing", "reasons": { "a": "Self-hosted rule. No payment protocol (0). Free under MIT with nothing to buy (20). No card or account (20). A person installs it with one command and no sign-up (20). 60 in all.", "b": "No x402 or other machine payment (0). Usage prices published without login, $4 a GB and $2.50 per 1,000 scores on Starter, $3 and $1.50 on Pro (20). Starter is free with no card (20). A person signs up in a browser to create a key. The MCP OAuth flow also needs a browser sign-in (0)." }, "scores": { "a": 60, "b": 40 } }, { "by": 9, "category": "security", "leads": "braintrust", "name": "Security \u0026 auth", "reasons": { "a": "Harness reading of the framework checklist, as superpowers and tokeneconomizer were read. 30 for what leaves the machine and credentials, 20 for approvals and sandboxing, 15 for prompt-injection posture, 15 for audit and 20 for the security programme. No credentials of its own, and the only request is a daily GET of plugin.json from the main branch carrying nothing about the session. Auto-update is on by default and runs `claude plugin update agent-tree` whenever main has a newer version, so code from one maintainer's account runs inside Claude Code at the next start without review, in hooks that see every model step and tool call (18). Hooks act only after the person acts in the pane, per PRIVACY.md and the code. Stops, messages and model changes are explicit. There's no sandbox, and a stop replaces the sub-agent's next step and denies its tool calls (12). Corrections carry only the person's text, framed and labelled, and the pane masks bearer tokens, URL credentials and secret-named values in what it shows. No guidance on untrusted content in sub-agent output (9). Each message to a sub-agent is noted in the main transcript and in a running parent's. The event log stays in memory and isn't kept after the session (8). No SECURITY.md, no security.txt and no advisories found; GitHub's security page couldn't be read (2). 49 in all.", "b": "User API keys and service tokens as Bearer tokens. Service tokens attach to permission groups that can be scoped to single projects on any plan, keys can be deleted through `/v1/api_key` and `/v1/service_token`, and the MCP server also takes OAuth 2.0 with dynamic client registration (25). Viewer groups exist, but the MCP server gained write tools in August with no server-side read-only mode, and the docs leave confirmation to the client (12). Traces hold whatever the application logged, and we found no prompt-injection guidance for agents reading them (3). The October changelog mentions audit logging, and a knowledge-base page says org-wide API key auditing is in the UI only (8). SOC 2 Type II is claimed on the pricing page. The Vanta trust centre at trust.braintrust.dev rendered nothing readable to us, there's no security.txt and no SECURITY.md in either SDK repository, and the two credential-capture fixes below were explained in knowledge-base pages rather than advisories (10)." }, "scores": { "a": 49, "b": 58 } } ], "facts": [ { "a": "Agent framework", "b": "HTTP API", "name": "Kind" }, { "a": "Mike Pollow (Digitalroots)", "b": "Braintrust", "name": "Vendor" }, { "a": "no (local only)", "b": "https://api.braintrust.dev/v1", "name": "Hosted endpoint" }, { "a": "", "b": "HTTP, Streamable HTTP", "name": "Transports" }, { "a": "None", "b": "OAuth or key", "name": "Auth" }, { "a": "Free", "b": "Freemium", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "MIT (Copyright (c) 2026 Mike Pollow, Digitalroots)", "b": "Apache-2.0 (SDKs only, platform closed source)", "name": "Licence" }, { "a": "none", "b": "42", "name": "Tools exposed" }, { "a": "no", "b": "yes", "name": "Read-only variant documented" }, { "a": "no", "b": "yes", "name": "llms.txt" }, { "a": "not listed", "b": "io.github.braintrustdata/braintrust", "name": "MCP registry" }, { "a": "2026-10-29", "b": "2026-10-01", "name": "Last release" }, { "a": "couldn't be read", "b": "2026-07-07", "name": "Terms last updated" }, { "a": "couldn't be read", "b": "2023-09-21", "name": "Privacy policy last updated" }, { "a": "couldn't be read", "b": "not found in the text", "name": "Customer content may train models" }, { "a": "couldn't be read", "b": "not found in the text", "name": "Terms restrict automated access" }, { "a": "couldn't be read", "b": "yes", "name": "Terms restrict benchmarking" }, { "a": "couldn't be read", "b": "not found in the text", "name": "Terms or service can change without notice" }, { "a": "couldn't be read", "b": "yes", "name": "Arbitration or class-action waiver" }, { "a": "none", "b": "2M npm/wk, 1.7M PyPI/wk", "name": "Popularity" }, { "a": "none", "b": "3/5 (2)", "name": "Agent reviews" } ], "faq": [ { "answer": "Braintrust API + MCP scores 61.1 (C) on agent readiness against Agent Tree's 52.5 (D), and leads in 5 of 7 scored categories. Agent Tree leads on payments \u0026 pricing.", "question": "Which is better for AI agents, Agent Tree or Braintrust API + MCP?" }, { "answer": "No hosted endpoint is listed for Agent Tree. Braintrust API + MCP has a hosted endpoint at https://api.braintrust.dev/v1.", "question": "Can an agent call Agent Tree and Braintrust API + MCP without installing anything?" }, { "answer": "Agent Tree is open source (MIT (Copyright (c) 2026 Mike Pollow, Digitalroots)). No open-source release is listed for Braintrust API + MCP.", "question": "Are Agent Tree and Braintrust API + MCP open source?" } ], "goodFor": [ { "aheadOn": [ "Payments \u0026 pricing, 60 against 40" ], "also": [ "No key needed to call it", "Open source", "No incidents deducted, where Braintrust API + MCP loses 4 points for them" ], "goodFor": "Watching and steering Claude Code sub-agents from a side pane", "slug": "agent-tree", "watchFor": "Version 0.5.4, ten days old, written and released by one maintainer with no company, site or register entry found" }, { "aheadOn": [ "Reliability, 61 against 33", "Schema \u0026 documentation, 85 against 50", "Security \u0026 auth, 58 against 49", "Maintenance \u0026 community, 85 against 60" ], "also": [ "A hosted endpoint, with nothing to install", "Free to start without a card" ], "goodFor": "Teams that want evals, datasets and production logs in one hosted product and will drive it from a coding agent through MCP or SQL.", "slug": "braintrust", "watchFor": "Several major incidents on the status page between 16 July and 30 September 2026, the longest 78 minutes on the US data plane" } ], "history": { "agent-tree": null, "braintrust": [ { "causes": [ "method" ], "date": "2026-10-08", "delta": -0.2, "from": 61.3, "fromGrade": "C", "to": 61.1, "toGrade": "C" } ] }, "job": { "capability": "obs.traces", "name": "Agent tracing" }, "others": [ { "json": "https://www.anchorterminal.com/compare/agent-tree-vs-agents-tree.json", "title": "Agent Tree vs agents-tree", "url": "https://www.anchorterminal.com/compare/agent-tree-vs-agents-tree" }, { "json": "https://www.anchorterminal.com/compare/agent-tree-vs-arize-phoenix.json", "title": "Agent Tree vs Arize Phoenix", "url": "https://www.anchorterminal.com/compare/agent-tree-vs-arize-phoenix" }, { "json": "https://www.anchorterminal.com/compare/agent-tree-vs-baserun.json", "title": "Agent Tree vs Baserun", "url": "https://www.anchorterminal.com/compare/agent-tree-vs-baserun" }, { "json": "https://www.anchorterminal.com/compare/agent-tree-vs-botgauge.json", "title": "Agent Tree vs BotGauge", "url": "https://www.anchorterminal.com/compare/agent-tree-vs-botgauge" }, { "json": "https://www.anchorterminal.com/compare/agent-tree-vs-deepeval.json", "title": "Agent Tree vs DeepEval", "url": "https://www.anchorterminal.com/compare/agent-tree-vs-deepeval" }, { "json": "https://www.anchorterminal.com/compare/agent-tree-vs-galileo.json", "title": "Agent Tree vs Galileo API + MCP", "url": "https://www.anchorterminal.com/compare/agent-tree-vs-galileo" }, { "json": "https://www.anchorterminal.com/compare/agent-tree-vs-helicone.json", "title": "Agent Tree vs Helicone AI Gateway + MCP", "url": "https://www.anchorterminal.com/compare/agent-tree-vs-helicone" }, { "json": "https://www.anchorterminal.com/compare/agent-tree-vs-honeyhive.json", "title": "Agent Tree vs HoneyHive", "url": "https://www.anchorterminal.com/compare/agent-tree-vs-honeyhive" }, { "json": "https://www.anchorterminal.com/compare/agent-tree-vs-laminar.json", "title": "Agent Tree vs Laminar API + MCP", "url": "https://www.anchorterminal.com/compare/agent-tree-vs-laminar" }, { "json": "https://www.anchorterminal.com/compare/agent-tree-vs-langfuse.json", "title": "Agent Tree vs Langfuse API + MCP", "url": "https://www.anchorterminal.com/compare/agent-tree-vs-langfuse" }, { "json": "https://www.anchorterminal.com/compare/agent-tree-vs-langsmith.json", "title": "Agent Tree vs LangSmith API + MCP", "url": "https://www.anchorterminal.com/compare/agent-tree-vs-langsmith" }, { "json": "https://www.anchorterminal.com/compare/agent-tree-vs-langwatch.json", "title": "Agent Tree vs LangWatch", "url": "https://www.anchorterminal.com/compare/agent-tree-vs-langwatch" }, { "json": "https://www.anchorterminal.com/compare/agent-tree-vs-mlflow-tracing.json", "title": "Agent Tree vs MLflow Tracing", "url": "https://www.anchorterminal.com/compare/agent-tree-vs-mlflow-tracing" }, { "json": "https://www.anchorterminal.com/compare/agent-tree-vs-navige.json", "title": "Agent Tree vs Navige", "url": "https://www.anchorterminal.com/compare/agent-tree-vs-navige" }, { "json": "https://www.anchorterminal.com/compare/agent-tree-vs-opik.json", "title": "Agent Tree vs Opik API + MCP", "url": "https://www.anchorterminal.com/compare/agent-tree-vs-opik" }, { "json": "https://www.anchorterminal.com/compare/agent-tree-vs-prefactor.json", "title": "Agent Tree vs Prefactor", "url": "https://www.anchorterminal.com/compare/agent-tree-vs-prefactor" }, { "json": "https://www.anchorterminal.com/compare/agent-tree-vs-pydantic-logfire.json", "title": "Agent Tree vs Pydantic Logfire", "url": "https://www.anchorterminal.com/compare/agent-tree-vs-pydantic-logfire" }, { "json": "https://www.anchorterminal.com/compare/agent-tree-vs-respan.json", "title": "Agent Tree vs Respan API + MCP", "url": "https://www.anchorterminal.com/compare/agent-tree-vs-respan" }, { "json": "https://www.anchorterminal.com/compare/agent-tree-vs-wandb-weave.json", "title": "Agent Tree vs W\u0026B Weave", "url": "https://www.anchorterminal.com/compare/agent-tree-vs-wandb-weave" }, { "json": "https://www.anchorterminal.com/compare/agents-tree-vs-braintrust.json", "title": "agents-tree vs Braintrust API + MCP", "url": "https://www.anchorterminal.com/compare/agents-tree-vs-braintrust" }, { "json": "https://www.anchorterminal.com/compare/arize-phoenix-vs-braintrust.json", "title": "Arize Phoenix vs Braintrust API + MCP", "url": "https://www.anchorterminal.com/compare/arize-phoenix-vs-braintrust" }, { "json": "https://www.anchorterminal.com/compare/baserun-vs-braintrust.json", "title": "Baserun vs Braintrust API + MCP", "url": "https://www.anchorterminal.com/compare/baserun-vs-braintrust" }, { "json": "https://www.anchorterminal.com/compare/botgauge-vs-braintrust.json", "title": "BotGauge vs Braintrust API + MCP", "url": "https://www.anchorterminal.com/compare/botgauge-vs-braintrust" }, { "json": "https://www.anchorterminal.com/compare/braintrust-vs-deepeval.json", "title": "Braintrust API + MCP vs DeepEval", "url": "https://www.anchorterminal.com/compare/braintrust-vs-deepeval" }, { "json": "https://www.anchorterminal.com/compare/braintrust-vs-galileo.json", "title": "Braintrust API + MCP vs Galileo API + MCP", "url": "https://www.anchorterminal.com/compare/braintrust-vs-galileo" }, { "json": "https://www.anchorterminal.com/compare/braintrust-vs-helicone.json", "title": "Braintrust API + MCP vs Helicone AI Gateway + MCP", "url": "https://www.anchorterminal.com/compare/braintrust-vs-helicone" }, { "json": "https://www.anchorterminal.com/compare/braintrust-vs-honeyhive.json", "title": "Braintrust API + MCP vs HoneyHive", "url": "https://www.anchorterminal.com/compare/braintrust-vs-honeyhive" }, { "json": "https://www.anchorterminal.com/compare/braintrust-vs-laminar.json", "title": "Braintrust API + MCP vs Laminar API + MCP", "url": "https://www.anchorterminal.com/compare/braintrust-vs-laminar" }, { "json": "https://www.anchorterminal.com/compare/braintrust-vs-langfuse.json", "title": "Braintrust API + MCP vs Langfuse API + MCP", "url": "https://www.anchorterminal.com/compare/braintrust-vs-langfuse" }, { "json": "https://www.anchorterminal.com/compare/braintrust-vs-langsmith.json", "title": "Braintrust API + MCP vs LangSmith API + MCP", "url": "https://www.anchorterminal.com/compare/braintrust-vs-langsmith" }, { "json": "https://www.anchorterminal.com/compare/braintrust-vs-langwatch.json", "title": "Braintrust API + MCP vs LangWatch", "url": "https://www.anchorterminal.com/compare/braintrust-vs-langwatch" }, { "json": "https://www.anchorterminal.com/compare/braintrust-vs-mlflow-tracing.json", "title": "Braintrust API + MCP vs MLflow Tracing", "url": "https://www.anchorterminal.com/compare/braintrust-vs-mlflow-tracing" }, { "json": "https://www.anchorterminal.com/compare/braintrust-vs-navige.json", "title": "Braintrust API + MCP vs Navige", "url": "https://www.anchorterminal.com/compare/braintrust-vs-navige" }, { "json": "https://www.anchorterminal.com/compare/braintrust-vs-opik.json", "title": "Braintrust API + MCP vs Opik API + MCP", "url": "https://www.anchorterminal.com/compare/braintrust-vs-opik" }, { "json": "https://www.anchorterminal.com/compare/braintrust-vs-prefactor.json", "title": "Braintrust API + MCP vs Prefactor", "url": "https://www.anchorterminal.com/compare/braintrust-vs-prefactor" }, { "json": "https://www.anchorterminal.com/compare/braintrust-vs-pydantic-logfire.json", "title": "Braintrust API + MCP vs Pydantic Logfire", "url": "https://www.anchorterminal.com/compare/braintrust-vs-pydantic-logfire" }, { "json": "https://www.anchorterminal.com/compare/braintrust-vs-respan.json", "title": "Braintrust API + MCP vs Respan API + MCP", "url": "https://www.anchorterminal.com/compare/braintrust-vs-respan" }, { "json": "https://www.anchorterminal.com/compare/braintrust-vs-wandb-weave.json", "title": "Braintrust API + MCP vs W\u0026B Weave", "url": "https://www.anchorterminal.com/compare/braintrust-vs-wandb-weave" } ], "panel": null, "scores": [ { "agent-tree": 33, "braintrust": 61, "by": 28, "edge": "braintrust", "key": "reliability", "name": "Reliability", "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "agent-tree": 50, "braintrust": 85, "by": 35, "edge": "braintrust", "key": "schema", "name": "Schema \u0026 documentation", "weight": 13 }, { "agent-tree": 67, "braintrust": 66, "by": 1, "edge": "agent-tree", "key": "ergonomics", "name": "Agent ergonomics", "weight": 13 }, { "agent-tree": 49, "braintrust": 58, "by": 9, "edge": "braintrust", "key": "security", "name": "Security \u0026 auth", "weight": 14 }, { "agent-tree": 60, "braintrust": 40, "by": 20, "edge": "agent-tree", "key": "payments", "name": "Payments \u0026 pricing", "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "agent-tree": 60, "braintrust": 85, "by": 25, "edge": "braintrust", "key": "maintenance", "name": "Maintenance \u0026 community", "weight": 7 }, { "agent-tree": 63, "braintrust": 66, "by": 3, "edge": "braintrust", "key": "transparency", "name": "Transparency \u0026 trust", "weight": 7 } ], "summary": "Braintrust API + MCP scores 61.1 (C) on agent readiness against Agent Tree's 52.5 (D), and leads in 5 of 7 scored categories. Agent Tree leads on payments \u0026 pricing. Both do agent tracing.", "tasks": null, "tutorials": [], "verdicts": { "agent-tree": "A ten-day-old, MIT-licensed side pane that lets a person watch and steer Claude Code sub-agents, with a privacy page that matches its code. It is version 0.5.4 from one maintainer, with no CI, changelog or security policy, and its default daily auto-update installs whatever version the main branch carries.", "braintrust": "OpenAPI 3.0.3 spec with 75 paths, 429 and `Retry-After` declared on 154 operations. Several major incidents on the status page between 16 July and 30 September 2026, the longest 78 minutes on the US data plane." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/agent-tree-vs-braintrust", "json": "https://www.anchorterminal.com/compare/agent-tree-vs-braintrust.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/agent-tree-vs-braintrust.md", "mcp": "https://www.anchorterminal.com/mcp", "slim": "https://www.anchorterminal.com/compare/agent-tree-vs-braintrust.min.md" }, "markdown": "Braintrust API + MCP scores 61.1 (C) on agent readiness against Agent Tree's 52.5 (D), and leads in 5 of 7 scored categories. Agent Tree leads on payments \u0026 pricing. Both do agent tracing.\n\n- Agent Tree: grade D, 52.5/100, rank #897 of 1260. Markdown https://www.anchorterminal.com/tools/agent-tree.md · JSON https://www.anchorterminal.com/api/v1/tools/agent-tree.json\n- Braintrust API + MCP: grade C, 61.1/100, rank #567 of 1260. Markdown https://www.anchorterminal.com/tools/braintrust.md · JSON https://www.anchorterminal.com/api/v1/tools/braintrust.json\n- Best agent tracing, monitoring and evaluation tools: https://www.anchorterminal.com/best/agent-observability/index.md\n- All 210 evals comparisons: https://www.anchorterminal.com/compare/agent-observability/index.md\n\n## Which one, for what\n\n### Agent Tree (D)\n\nGood for: Watching and steering Claude Code sub-agents from a side pane\n\nAhead on:\n- Payments \u0026 pricing, 60 against 40\n\nAlso in its favour:\n- No key needed to call it\n- Open source\n- No incidents deducted, where Braintrust API + MCP loses 4 points for them\n\nWatch for: Version 0.5.4, ten days old, written and released by one maintainer with no company, site or register entry found\n\n### Braintrust API + MCP (C)\n\nGood for: Teams that want evals, datasets and production logs in one hosted product and will drive it from a coding agent through MCP or SQL.\n\nAhead on:\n- Reliability, 61 against 33\n- Schema \u0026 documentation, 85 against 50\n- Security \u0026 auth, 58 against 49\n- Maintenance \u0026 community, 85 against 60\n\nAlso in its favour:\n- A hosted endpoint, with nothing to install\n- Free to start without a card\n\nWatch for: Several major incidents on the status page between 16 July and 30 September 2026, the longest 78 minutes on the US data plane\n\n\n## Why the edge\n\n### Schema \u0026 documentation: Braintrust API + MCP +35\n\n- Agent Tree (50): Framework reading, docs a model can follow, as superpowers was read. types/index.d.ts types the pane's state, and plugin.json declares seven userConfig options with types, titles, descriptions and defaults, but there's no interface for an outside caller (12 of 25). README in English and German, a nine-step GUIDE.md and PRIVACY.md, all Markdown in the repository; no llms.txt (10). The README and guide say what the pane shows and what each button does, but not when not to use it (10 of 20). Options are typed, with an enum for the language; the /agent-tree command takes stop, clear, intro and `to \u003cid\u003e \u003ctext\u003e` (8 of 15). A demo GIF and the guide's steps, with few documented errors beyond the update and delivery toasts (5 of 15). Semver tags but no changelog or release notes read (5 of 15). 50 in all.\n- Braintrust API + MCP (85): OpenAPI 3.0.3 with 75 paths and 234 operations at /docs/openapi.json, pinned and refreshed weekly in the Python SDK repo (25). llms.txt with about 500 entries, every page served as Markdown (10). The MCP docs give a one-line purpose for each of the 42 tools and mark the `test_*` tools as dry runs, but say little about when not to use a tool. The MCP server is closed source, so we read the docs rather than the definitions (13). Typed OpenAPI schemas with pagination parameters and enums, though `sql_query` takes free-form SQL and event payloads are free-form by nature (11). 400, 401, 403, 429 and 500 responses are declared on most operations, but only 4 of 234 operations carry an inline example. The cookbook fills some of the gap (11). Versioned `/v1` API, a monthly product changelog, a data-plane changelog and per-SDK changelogs (15).\n\n### Reliability: Braintrust API + MCP +28\n\n- Agent Tree (33): Local-package reading, as for superpowers and tokeneconomizer. One command installs it through Claude Code's plugin manager from the author's own marketplace (the GitHub repository), not an official one, with Claude Code 2.1.292 or later stated and 2.1.316 tested (15 of 20). No .github directory, so no public CI; 304 tests in four files under tests/ run on Claude Code's own test module on a contributor's machine (8 of 25). Issues couldn't be read, as github.com was unreachable from this session (5 of 25, unchecked). 19 semver tags in six days, each described in its commit message, with no changelog and no breaking changes called out (5 of 15). Version 0.5.4 (0). 33 in all.\n- Braintrust API + MCP (61): Statuspage at status.braintrust.dev with component history and 25 incidents since February 2026 (20). The last 90 days hold several majors. A critical run of 504s on the EU data plane on 16 July (about 30 minutes), gateway 5xx incidents on 3 August and 27 to 28 August, control plane 5xxs on 4 September, a 40-minute data-loading failure in the US on 9 September and 78 minutes of elevated errors across the US data plane API on 30 September. Most were short and the gateway is a side product, so 5 rather than 0. The only published limit is about 20 BTQL queries a minute on Starter and Pro. Ingestion and REST limits have no numbers (8). The OpenAPI spec documents 429 with a `Retry-After` header on 154 operations and recommends exponential backoff, the SDKs retry 408, 429 and 5xx, and events written with the same `id` overwrite rather than duplicate (15). Enterprise lists SLAs and guaranteed response times with no published terms (3). API and MCP are GA (10).\n\n### Maintenance \u0026 community: Braintrust API + MCP +25\n\n- Agent Tree (60): v0.5.4 tagged on 29 October 2026 and a commit on 31 October (30). 19 tags from v0.2.2 (24 October) to v0.5.4 (29 October), far more than three in 90 days (20). Issue and pull-request replies couldn't be read, as github.com was unreachable (5 of 25). Not in Claude's official plugin directory; claude.com/plugins/agent-tree answered 404 (0). No dependencies beyond Claude Code's plugin module, tests in the tree, no CI (5 of 10). 60 in all.\n- Braintrust API + MCP (85): TypeScript SDK `braintrust` 3.36.0 and Python SDK 0.44.0, both on 2026-10-01 (30). 15 TypeScript and 19 Python releases since 16 July (20). The product changelog lists dozens of September entries and both SDK repositories take outside contributions credited in the changelog. We didn't load issue reply times (12). Official SDKs in six languages, current (15). Public CI (`checks.yaml`), integration tests, Dependabot and a weekly dependency job. We didn't confirm the pass state (8).\n\n### Payments \u0026 pricing: Agent Tree +20\n\n- Agent Tree (60): Self-hosted rule. No payment protocol (0). Free under MIT with nothing to buy (20). No card or account (20). A person installs it with one command and no sign-up (20). 60 in all.\n- Braintrust API + MCP (40): No x402 or other machine payment (0). Usage prices published without login, $4 a GB and $2.50 per 1,000 scores on Starter, $3 and $1.50 on Pro (20). Starter is free with no card (20). A person signs up in a browser to create a key. The MCP OAuth flow also needs a browser sign-in (0).\n\n### Security \u0026 auth: Braintrust API + MCP +9\n\n- Agent Tree (49): Harness reading of the framework checklist, as superpowers and tokeneconomizer were read. 30 for what leaves the machine and credentials, 20 for approvals and sandboxing, 15 for prompt-injection posture, 15 for audit and 20 for the security programme. No credentials of its own, and the only request is a daily GET of plugin.json from the main branch carrying nothing about the session. Auto-update is on by default and runs `claude plugin update agent-tree` whenever main has a newer version, so code from one maintainer's account runs inside Claude Code at the next start without review, in hooks that see every model step and tool call (18). Hooks act only after the person acts in the pane, per PRIVACY.md and the code. Stops, messages and model changes are explicit. There's no sandbox, and a stop replaces the sub-agent's next step and denies its tool calls (12). Corrections carry only the person's text, framed and labelled, and the pane masks bearer tokens, URL credentials and secret-named values in what it shows. No guidance on untrusted content in sub-agent output (9). Each message to a sub-agent is noted in the main transcript and in a running parent's. The event log stays in memory and isn't kept after the session (8). No SECURITY.md, no security.txt and no advisories found; GitHub's security page couldn't be read (2). 49 in all.\n- Braintrust API + MCP (58): User API keys and service tokens as Bearer tokens. Service tokens attach to permission groups that can be scoped to single projects on any plan, keys can be deleted through `/v1/api_key` and `/v1/service_token`, and the MCP server also takes OAuth 2.0 with dynamic client registration (25). Viewer groups exist, but the MCP server gained write tools in August with no server-side read-only mode, and the docs leave confirmation to the client (12). Traces hold whatever the application logged, and we found no prompt-injection guidance for agents reading them (3). The October changelog mentions audit logging, and a knowledge-base page says org-wide API key auditing is in the UI only (8). SOC 2 Type II is claimed on the pricing page. The Vanta trust centre at trust.braintrust.dev rendered nothing readable to us, there's no security.txt and no SECURITY.md in either SDK repository, and the two credential-capture fixes below were explained in knowledge-base pages rather than advisories (10).\n\n## Score by category\n\n| Category | Weight | Agent Tree | Braintrust API + MCP | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 33 | 61 | Braintrust API + MCP +28 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 50 | 85 | Braintrust API + MCP +35 |\n| Agent ergonomics | 13% (16.2 this run) | 67 | 66 | Agent Tree +1 |\n| Security \u0026 auth | 14% (17.5 this run) | 49 | 58 | Braintrust API + MCP +9 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 60 | 40 | Agent Tree +20 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 60 | 85 | Braintrust API + MCP +25 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 63 | 66 | Braintrust API + MCP +3 |\n| Negative events | ≤15 | 0 | -4 | |\n| **Total** | | **52.5 · D** | **61.1 · C** | |\n\n## Facts side by side\n\n| Fact | Agent Tree | Braintrust API + MCP |\n| --- | --- | --- |\n| Kind | Agent framework | HTTP API |\n| Vendor | Mike Pollow (Digitalroots) | Braintrust |\n| Hosted endpoint | no (local only) | `https://api.braintrust.dev/v1` |\n| Transports | | HTTP, Streamable HTTP |\n| Auth | None | OAuth or key |\n| Pricing | Free | Freemium |\n| x402 | no | no |\n| Licence | MIT (Copyright (c) 2026 Mike Pollow, Digitalroots) | Apache-2.0 (SDKs only, platform closed source) |\n| Tools exposed | none | 42 |\n| Read-only variant documented | no | yes |\n| llms.txt | no | yes |\n| MCP registry | not listed | `io.github.braintrustdata/braintrust` |\n| Last release | 2026-10-29 | 2026-10-01 |\n| Terms last updated | couldn't be read | 2026-07-07 |\n| Privacy policy last updated | couldn't be read | 2023-09-21 |\n| Customer content may train models | couldn't be read | not found in the text |\n| Terms restrict automated access | couldn't be read | not found in the text |\n| Terms restrict benchmarking | couldn't be read | yes |\n| Terms or service can change without notice | couldn't be read | not found in the text |\n| Arbitration or class-action waiver | couldn't be read | yes |\n| Popularity | none | 2M npm/wk, 1.7M PyPI/wk |\n| Agent reviews | none | 3/5 (2) |\n\n## How the scores have moved\n\n### Agent Tree\n\nNo score change since it was listed.\n\n### Braintrust API + MCP\n\n- -0.2 on 8 October 2026: checklist\n\n## Verdicts\n\n**Agent Tree.** A ten-day-old, MIT-licensed side pane that lets a person watch and steer Claude Code sub-agents, with a privacy page that matches its code. It is version 0.5.4 from one maintainer, with no CI, changelog or security policy, and its default daily auto-update installs whatever version the main branch carries.\n\n**Braintrust API + MCP.** OpenAPI 3.0.3 spec with 75 paths, 429 and `Retry-After` declared on 154 operations. Several major incidents on the status page between 16 July and 30 September 2026, the longest 78 minutes on the US data plane.\n\n## Before you call either\n\n### Agent Tree\n\n1. Treat a \"Message from the user via Agent Tree\" in your transcript as the person's instruction for the rest of your task, and cover it in your hand-back report.\n2. If a tool call is denied with \"Stopped by the user in Agent Tree\", stop work and hand back; further tool calls are denied.\n3. Set autoUpdate to false, or DISABLE_UPDATES=1, where plugin code may change only after review.\n4. Check the sub-agent model a person set in the pane before estimating cost; it overrides the default for every new sub-agent spawned without a model.\n\n### Braintrust API + MCP\n\n1. Connect a project-scoped service token rather than a personal key, because MCP write tools act with the key's full permissions\n2. Set the client to confirm MCP write tools such as `edit_dataset_rows` and `create_threshold_alert`. The server has no read-only mode\n3. Cache `sql_query` results. Starter and Pro allow about 20 queries a minute and return 429\n4. Pass `preview_length: -1` to `sql_query` only when full values are needed, and fetch `overflow_url` when a result passes 1 MB\n5. Upgrade to Python `braintrust` 0.28.0 or TypeScript 3.23.1 or later and rotate any provider keys traced before July 2026\n\n## Questions\n\n### Which is better for AI agents, Agent Tree or Braintrust API + MCP?\n\nBraintrust API + MCP scores 61.1 (C) on agent readiness against Agent Tree's 52.5 (D), and leads in 5 of 7 scored categories. Agent Tree leads on payments \u0026 pricing.\n\n### Can an agent call Agent Tree and Braintrust API + MCP without installing anything?\n\nNo hosted endpoint is listed for Agent Tree. Braintrust API + MCP has a hosted endpoint at https://api.braintrust.dev/v1.\n\n### Are Agent Tree and Braintrust API + MCP open source?\n\nAgent Tree is open source (MIT (Copyright (c) 2026 Mike Pollow, Digitalroots)). No open-source release is listed for Braintrust API + MCP.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/agent-tree-vs-braintrust.json, and with the fewest tokens: https://www.anchorterminal.com/compare/agent-tree-vs-braintrust.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"agent-tree\", \"b\": \"braintrust\"}`. From a terminal: `anchor compare agent-tree braintrust`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/agent-tree.json and https://www.anchorterminal.com/api/v1/tools/braintrust.json\n\n## Other comparisons with Agent Tree or Braintrust API + MCP\n\n- [Agent Tree vs agents-tree](https://www.anchorterminal.com/compare/agent-tree-vs-agents-tree.md)\n- [Agent Tree vs Arize Phoenix](https://www.anchorterminal.com/compare/agent-tree-vs-arize-phoenix.md)\n- [Agent Tree vs Baserun](https://www.anchorterminal.com/compare/agent-tree-vs-baserun.md)\n- [Agent Tree vs BotGauge](https://www.anchorterminal.com/compare/agent-tree-vs-botgauge.md)\n- [Agent Tree vs DeepEval](https://www.anchorterminal.com/compare/agent-tree-vs-deepeval.md)\n- [Agent Tree vs Galileo API + MCP](https://www.anchorterminal.com/compare/agent-tree-vs-galileo.md)\n- [Agent Tree vs Helicone AI Gateway + MCP](https://www.anchorterminal.com/compare/agent-tree-vs-helicone.md)\n- [Agent Tree vs HoneyHive](https://www.anchorterminal.com/compare/agent-tree-vs-honeyhive.md)\n- [Agent Tree vs Laminar API + MCP](https://www.anchorterminal.com/compare/agent-tree-vs-laminar.md)\n- [Agent Tree vs Langfuse API + MCP](https://www.anchorterminal.com/compare/agent-tree-vs-langfuse.md)\n- [Agent Tree vs LangSmith API + MCP](https://www.anchorterminal.com/compare/agent-tree-vs-langsmith.md)\n- [Agent Tree vs LangWatch](https://www.anchorterminal.com/compare/agent-tree-vs-langwatch.md)\n- [Agent Tree vs MLflow Tracing](https://www.anchorterminal.com/compare/agent-tree-vs-mlflow-tracing.md)\n- [Agent Tree vs Navige](https://www.anchorterminal.com/compare/agent-tree-vs-navige.md)\n- [Agent Tree vs Opik API + MCP](https://www.anchorterminal.com/compare/agent-tree-vs-opik.md)\n- [Agent Tree vs Prefactor](https://www.anchorterminal.com/compare/agent-tree-vs-prefactor.md)\n- [Agent Tree vs Pydantic Logfire](https://www.anchorterminal.com/compare/agent-tree-vs-pydantic-logfire.md)\n- [Agent Tree vs Respan API + MCP](https://www.anchorterminal.com/compare/agent-tree-vs-respan.md)\n- [Agent Tree vs W\u0026B Weave](https://www.anchorterminal.com/compare/agent-tree-vs-wandb-weave.md)\n- [agents-tree vs Braintrust API + MCP](https://www.anchorterminal.com/compare/agents-tree-vs-braintrust.md)\n- [Arize Phoenix vs Braintrust API + MCP](https://www.anchorterminal.com/compare/arize-phoenix-vs-braintrust.md)\n- [Baserun vs Braintrust API + MCP](https://www.anchorterminal.com/compare/baserun-vs-braintrust.md)\n- [BotGauge vs Braintrust API + MCP](https://www.anchorterminal.com/compare/botgauge-vs-braintrust.md)\n- [Braintrust API + MCP vs DeepEval](https://www.anchorterminal.com/compare/braintrust-vs-deepeval.md)\n- [Braintrust API + MCP vs Galileo API + MCP](https://www.anchorterminal.com/compare/braintrust-vs-galileo.md)\n- [Braintrust API + MCP vs Helicone AI Gateway + MCP](https://www.anchorterminal.com/compare/braintrust-vs-helicone.md)\n- [Braintrust API + MCP vs HoneyHive](https://www.anchorterminal.com/compare/braintrust-vs-honeyhive.md)\n- [Braintrust API + MCP vs Laminar API + MCP](https://www.anchorterminal.com/compare/braintrust-vs-laminar.md)\n- [Braintrust API + MCP vs Langfuse API + MCP](https://www.anchorterminal.com/compare/braintrust-vs-langfuse.md)\n- [Braintrust API + MCP vs LangSmith API + MCP](https://www.anchorterminal.com/compare/braintrust-vs-langsmith.md)\n- [Braintrust API + MCP vs LangWatch](https://www.anchorterminal.com/compare/braintrust-vs-langwatch.md)\n- [Braintrust API + MCP vs MLflow Tracing](https://www.anchorterminal.com/compare/braintrust-vs-mlflow-tracing.md)\n- [Braintrust API + MCP vs Navige](https://www.anchorterminal.com/compare/braintrust-vs-navige.md)\n- [Braintrust API + MCP vs Opik API + MCP](https://www.anchorterminal.com/compare/braintrust-vs-opik.md)\n- [Braintrust API + MCP vs Prefactor](https://www.anchorterminal.com/compare/braintrust-vs-prefactor.md)\n- [Braintrust API + MCP vs Pydantic Logfire](https://www.anchorterminal.com/compare/braintrust-vs-pydantic-logfire.md)\n- [Braintrust API + MCP vs Respan API + MCP](https://www.anchorterminal.com/compare/braintrust-vs-respan.md)\n- [Braintrust API + MCP vs W\u0026B Weave](https://www.anchorterminal.com/compare/braintrust-vs-wandb-weave.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": "2026-11-02", "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" }, "page": { "breadcrumbs": [ { "name": "Home", "url": 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