{ "data": { "a": { "slug": "agent37", "name": "Agent 37 Cloud", "vendor": "Agent 37 Inc.", "vendorUrl": "https://www.agent37.com/cloud", "kind": "http-api", "category": "code-sandboxes", "summary": "Agent 37 Cloud hosts persistent Linux sandboxes for agent harnesses such as Hermes, OpenClaw, Claude Code and Codex, or a custom Docker image. A REST API creates instances, runs commands, manages files and sends messages to the agent inside.", "url": "https://www.anchorterminal.com/tools/agent37", "markdownUrl": "https://www.anchorterminal.com/tools/agent37.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/agent37.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/agent37.json", "repo": "https://github.com/agent37-platform/templates", "license": "Proprietary service under Agent 37's terms of service. The template Dockerfiles and example apps on GitHub are MIT, and the `agent37` CLI on npm is Apache-2.0", "transports": [ "http" ], "remoteUrl": "https://api.agent37.com/v1", "packages": [ { "registry": "npm", "name": "agent37" } ], "auth": "api-key", "authNotes": "Self-serve. A person signs up, adds a card and creates an `sk_live_` key in the dashboard, where the full key is shown once. The key is workspace-wide and goes in `Authorization: Bearer` on https://api.agent37.com/v1 and in the `X-Agent37-Key` header on each instance URL. A key can carry an IP allowlist of up to 20 addresses or CIDR ranges. No scopes, read-only keys or key-creation API were found. Browsers reach an instance port through a signed URL that lasts 60 seconds to seven days and can't be revoked.", "pricing": "usage", "pricingNotes": "Prepaid balance, metered per minute. $0.80 a vCPU-month, $0.70 a GB-month of memory and $0.09 a GB-month of disk on a 730-hour month, so 2 vCPU and 4 GB with a 4 GB disk is $4.76 a month running and $0.36 a month asleep or stopped. Performance instances on dedicated cores cost four times the compute rate. Adding a card grants a one-time $5 credit with nothing charged, limited to one 2 vCPU, 4 GB instance until the first top-up. Top-ups are $5 to $10,000 through Stripe, and automatic top-up is on by default after the first one. Managed model, search and integration calls bill at cost from the same balance (https://www.agent37.com/docs/agents-api/billing, checked 2026-10-08).", "priceSummary": "$0.0011 / vCPU-hr", "where": "hosted", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the docs (llms-full.txt), the pricing page or the terms (checked 2026-10-08). The wallet is topped up by card through Stripe in the dashboard.", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": null, "npmWeekly": 74, "pypiWeekly": null, "asOf": "2026-10-08" }, "docsUrl": "https://www.agent37.com/docs", "llmsTxt": "https://www.agent37.com/docs/llms.txt", "capabilities": [ "sandbox.persist", "sandbox.code", "sandbox.fs", "sandbox.browser" ], "tags": [ "hosted", "usage", "llms-txt", "cli", "docker", "yc", "new" ], "lastRelease": "2026-10-05", "graded": true, "anchor": { "graded": true, "score": 46.1, "grade": "D", "agentReady": false, "rank": 564, "ranked": true, "rankOf": 629, "categoryRank": 10, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 60, "maintenance": 65, "payments": 20, "reliability": 27, "schema": 57, "security": 49, "transparency": 56 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-08" }, "negative": 0, "verdict": "Instances keep their disk until deleted, sleep when idle and wake on the next request, with compute published at $0.80 a vCPU-month and stable error codes on both APIs. The product launched on 29 September 2026. No status page, OpenAPI file, SDK library or published rate limits were found, and the starter credit needs a card.", "bestFor": "A product that gives each end user a long-lived agent machine that is idle most of the day and needs a harness preinstalled.", "strengths": [ "Disk persists until delete, and auto-sleep checkpoints an idle instance so that only disk bills ($0.09 a GB-month)", "Per-unit prices are public. A 2 vCPU, 4 GB instance running all month is $4.76, metered per minute", "Stable error codes on both APIs, with `param` and `hint` fields and written retry guidance for each transient code", "llms.txt, a 637 KB llms-full.txt and a Markdown copy of each of the 49 docs pages", "API keys take an IP allowlist of up to 20 addresses or ranges, and each instance has its own managed-spend cap" ], "weaknesses": [ "No status page was found. status.agent37.com returns 404, and the terms promise no uptime level", "No OpenAPI file, SDK library or public changelog was found. The npm package `agent37` is a CLI", "No API rate limits are published beyond one on-demand backup per instance every 15 minutes", "One workspace-wide key controls every instance. No scopes or read-only keys were found", "The $5 starter credit needs a card on file, and keys and top-ups exist only in the dashboard", "The launch is dated 29 September 2026 and the public templates repository starts on 2 October 2026" ], "agentNotes": [ "Send the key as `Authorization: Bearer` to api.agent37.com and as `X-Agent37-Key` to the instance URL. The Bearer form on instance URLs is deprecated", "Poll `GET /v1/health` on the instance URL for `\"healthy\": true` before the first message. `status: running` only means the machine is up", "Check whether `error` is a string before reading `error.code`. Transport errors are flat strings, and a failed turn returns 200 with `status: \"failed\"`", "Don't blindly retry an exec that timed out after 13 minutes. The command keeps running, so a retry starts a second copy", "Set `auto_sleep: true`, keep anything that must survive a sleep in a file, and allow a first-byte timeout of three minutes for wakes" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "D", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 46.1 } ], "editorialScores": { "ergonomics": 60, "maintenance": 65, "payments": 20, "reliability": 27, "schema": 57, "security": 49, "transparency": 56 }, "provenanceScore": 56 }, "connect": { "http": "curl -X POST https://api.agent37.com/v1/instances \\\n -H \"Authorization: Bearer sk_live_...\" \\\n -H \"Content-Type: application/json\" \\\n -d '{ \"budget\": { \"credit_micros\": 1000000 } }'" }, "letme": { "capability": "https://letme.dev/sandbox.persist", "tool": "https://letme.dev/agent37" }, "area": "agent-runtime", "unitPrices": [ { "item": "vCPU", "unit": "vcpu-hour", "usd": 0.001096, "note": "$0.80 a vCPU-month over 730 hours. Memory extra at $0.70 a GB-month, and Performance instances cost four times the compute rate" }, { "item": "Default instance (2 vCPU, 4 GB, 4 GB disk)", "unit": "session-hour", "usd": 0.00652, "note": "$4.76 a month running, metered per minute. $0.36 a month asleep or stopped" }, { "item": "Disk", "unit": "gb-month", "usd": 0.09, "note": "Billed until the instance is deleted. $0.03 a GB-month on compressed bytes once parked in cold storage" } ], "provenance": { "legalEntity": "Agent 37 Inc.", "domain": "agent37.com", "domainRegistered": "2025-04-29", "endpointOnVendorDomain": true, "terms": "https://www.agent37.com/terms", "privacy": "https://www.agent37.com/privacy", "statusPage": "", "changelog": "", "securityTxt": "none", "checked": "2026-10-08", "notes": [ "The terms (last updated 4 August 2026) name Agent 37 Inc. under New York law. The privacy policy (last updated 1 September 2026) names Agent 37 Inc. and, in its representative section, Agent37.com Inc.", "The Hosting API answers at api.agent37.com and instances at {id}.agent37.app, a second domain the docs describe as the vendor's.", "www.agent37.com/.well-known/security.txt returns 404. The site footer has a Report abuse link and no disclosure policy was found.", "status.agent37.com returns 404 (deployment not found) and no status page is linked from the site or docs. No changelog page was found.", "RDAP for agent37.com gives a registration date of 2025-04-29 and NameCheap, Inc. as registrar.", "trust.agent37.com answered 403 to our reader, so the trust centre is unread." ], "score": 56 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/agent37.json", "live": { "slug": "agent37", "probe": { "target": "https://api.agent37.com/v1", "method": "get", "lastAt": "2026-10-08T18:20:23.772016566Z", "lastOk": true, "lastStatus": 404, "lastMs": 85, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 83, "p95ms24h": 364, "samples24h": 33, "samples30d": 33, "days": [ { "date": "2026-10-08", "probes": 33, "ok": 33 } ] }, "versions": [ { "registry": "npm", "name": "agent37", "version": "0.4.0", "seenAt": "2026-10-08T15:56:42.792052264Z" } ], "githubStars": 0, "npmWeekly": 74, "securityTxt": { "url": "https://agent37.com/.well-known/security.txt", "state": "none", "checkedAt": "2026-10-08T15:38:33.079951688Z" }, "updatedAt": "2026-10-08T18:20:23.772016566Z" } }, "answer": "Modal Sandboxes scores 75.5 (BB) on agent readiness against Agent 37 Cloud's 46.1 (D), and leads in every scored category.", "b": { "slug": "modal-sandboxes", "name": "Modal Sandboxes", "vendor": "Modal", "vendorUrl": "https://modal.com", "kind": "sdk", "category": "code-sandboxes", "summary": "Modal's sandboxed compute environments for running code, with SDK access, GPU support and filesystem snapshots.", "url": "https://www.anchorterminal.com/tools/modal-sandboxes", "markdownUrl": "https://www.anchorterminal.com/tools/modal-sandboxes.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/modal-sandboxes.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/modal-sandboxes.json", "repo": "https://github.com/modal-labs/modal-client", "license": "Apache-2.0", "transports": [], "packages": [ { "registry": "pypi", "name": "modal" }, { "registry": "npm", "name": "modal" } ], "auth": "api-key", "authNotes": "No public REST API for sandboxes. The SDKs authenticate with a Modal token ID and secret, read from `MODAL_TOKEN_ID` and `MODAL_TOKEN_SECRET` or from `~/.modal.toml` (written by `modal token set`). Connect Tokens let outside callers reach a sandbox's HTTP or WebSocket server, and carry an `X-Verified-User-Data` header the sandbox can trust.", "pricing": "freemium", "pricingNotes": "Sandboxes cost $0.00003942 a physical core-second (one core is 2 vCPU, minimum 0.125 cores) and $0.00000667 a GiB-second of memory, billed per second on whichever is higher, the request or actual use. GPUs bill at Modal's standard per-second GPU rates. Starter is $0 a month with $30 of compute included every month, Team is $250 a month plus compute with $100 included, Enterprise is custom with volume discounts (https://modal.com/pricing, https://modal.com/docs/guide/sandbox-resources.md).", "priceSummary": "$0.071 / vCPU-hr", "where": "local", "x402": { "level": "no", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": 514, "npmWeekly": 940973, "pypiWeekly": 10146778, "asOf": "2026-09-30" }, "docsUrl": "https://modal.com/docs/guide/sandboxes", "llmsTxt": "https://modal.com/llms.txt", "capabilities": [ "sandbox.code", "sandbox.fs", "sandbox.persist", "sandbox.gpu" ], "tags": [ "hosted", "freemium", "free-tier", "python", "typescript", "go", "llms-txt", "enterprise" ], "lastRelease": "2026-09-28", "graded": true, "anchor": { "graded": true, "score": 75.5, "grade": "BB", "agentReady": true, "rank": 41, "ranked": true, "rankOf": 629, "categoryRank": 2, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 67, "maintenance": 93, "payments": 40, "reliability": 95, "schema": 79, "security": 76, "transparency": 72 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-01" }, "negative": 0, "verdict": "GPU sandboxes at the same per-second rates as the rest of Modal. No REST API, and the JavaScript and Go SDKs are beta.", "bestFor": "GPU work inside a sandbox, or agents already running on Modal.", "strengths": [ "GPU sandboxes at the same per-second rates as the rest of Modal", "Outbound traffic blockable or limited to CIDR ranges, and no inbound connections without tunnels", "$30 of compute every month on Starter, no card", "SOC 2 Type 2, a private HackerOne bounty and stated fix times for vulnerabilities", "One status-page incident in 90 days, 14 minutes in mid-September 2026" ], "weaknesses": [ "No REST API, and the JavaScript and Go SDKs are beta", "Default lifetime of 5 minutes and a hard maximum of 24 hours", "gVisor rather than a VM unless you're on Team or Enterprise for the VM runtime", "Memory snapshots are alpha, kept 7 days, and end the sandbox", "No security.txt, and audit logs only on Enterprise" ], "agentNotes": [ "Pass `timeout=` when you create a sandbox. The default lifetime is 5 minutes", "Set `block_network=True` or a `cidr_allowlist` for untrusted code", "Give a sandbox a `name` so a retried create raises `AlreadyExistsError` instead of starting a second one", "Snapshot the filesystem before the 24-hour limit and start a fresh sandbox from it", "Catch `ResourceExhaustedError` from `Sandbox.create()` on SDK 1.6.0 and later" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 8, "avgRating": 3.3, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "BB", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 75.5 } ], "editorialScores": { "ergonomics": 67, "maintenance": 93, "payments": 40, "reliability": 95, "schema": 79, "security": 76, "transparency": 60 }, "provenanceScore": 84 }, "connect": { "install": "pip install modal # or npm i modal" }, "letme": { "capability": "https://letme.dev/sandbox.code", "tool": "https://letme.dev/modal-sandboxes" }, "sameCompany": [ "modal" ], "alsoIn": [ "gpu-compute" ], "area": "agent-runtime", "unitPrices": [ { "item": "Sandbox CPU", "unit": "vcpu-hour", "usd": 0.071, "note": "$0.00003942 a physical core-second, one core is 2 vCPU. Memory extra at $0.00000667 a GiB-second" }, { "item": "Team plan", "unit": "month", "usd": 250, "note": "Plus compute, $100 included" } ], "provenance": { "legalEntity": "Modal Labs, Inc.", "domain": "modal.com", "domainRegistered": "1999-03-18", "domainNote": "modal.com was registered in 1999, long before Modal Labs, so the domain was bought later.", "endpointOnVendorDomain": null, "terms": "https://modal.com/legal/terms", "privacy": "https://modal.com/legal/privacy-policy", "statusPage": "https://status.modal.com", "changelog": "https://modal.com/docs/sdk/py/releases", "securityTxt": "none", "checked": "2026-09-30", "notes": [ "Terms (May 2026) name Modal Labs, Inc., a Delaware corporation, under California law.", "Sandboxes are reached through the SDK rather than a documented public endpoint, so there's no endpoint URL to check against the domain.", "modal.com/.well-known/security.txt returns 404. The security guide gives security@modal.com and a private HackerOne programme." ], "score": 84 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/modal-sandboxes.json", "live": { "slug": "modal-sandboxes", "vendorStatus": { "page": "https://status.modal.com", "indicator": "unknown", "summary": "no machine-readable status found", "checkedAt": "2026-10-08T17:50:52.600003593Z" }, "versions": [ { "registry": "npm", "name": "modal", "version": "0.11.0", "seenAt": "2026-10-08T16:21:39.611509889Z" }, { "registry": "pypi", "name": "modal", "version": "1.6.1", "released": "2026-10-03", "seenAt": "2026-10-08T16:21:39.471099291Z" } ], "githubStars": 522, "npmWeekly": 976721, "pypiWeekly": 10794735, "securityTxt": { "url": "https://modal.com/.well-known/security.txt", "state": "none", "checkedAt": "2026-10-08T15:38:35.387911158Z" }, "llmsTxt": { "url": "https://modal.com/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-10-08T14:00:39.602992362Z" }, "domain": { "domain": "modal.com", "registered": "1999-03-18", "source": "https://rdap.verisign.com/com/v1/domain/modal.com", "checkedAt": "2026-10-04T13:03:51.14581991Z" }, "pages": [ { "url": "https://modal.com/docs/sdk/py/releases", "kind": "changelog", "status": 200, "checkedAt": "2026-10-08T18:22:08.619124868Z", "changedAt": "2026-10-04T15:46:02.530693875Z", "fingerprint": "2d8a24963498" }, { "url": "https://modal.com/pricing", "kind": "pricing", "status": 200, "checkedAt": "2026-10-08T18:22:15.105990601Z", "changedAt": "2026-10-07T18:07:40.290186482Z", "fingerprint": "2bebc792cd5e" }, { "url": "https://modal.com/legal/privacy-policy", "kind": "privacy", "status": 200, "checkedAt": "2026-10-08T18:22:11.552613672Z", "changedAt": "2026-10-07T18:07:37.098211707Z", "fingerprint": "602809288e68" }, { "url": "https://modal.com/legal/terms", "kind": "terms", "status": 200, "checkedAt": "2026-10-08T18:22:13.03355875Z", "changedAt": "2026-10-07T18:07:38.590004865Z", "fingerprint": "d2254dcf3a27" } ], "updatedAt": "2026-10-08T18:22:15.105990601Z" } }, "facts": [ { "a": "HTTP API", "b": "SDK + MCP", "name": "Kind" }, { "a": "Agent 37 Inc.", "b": "Modal", "name": "Vendor" }, { "a": "https://api.agent37.com/v1", "b": "no (local only)", "name": "Hosted endpoint" }, { "a": "HTTP", "b": "", "name": "Transports" }, { "a": "API key", "b": "API key", "name": "Auth" }, { "a": "Pay per use", "b": "Freemium", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "Proprietary service under Agent 37's terms of service. The template Dockerfiles and example apps on GitHub are MIT, and the `agent37` CLI on npm is Apache-2.0", "b": "Apache-2.0", "name": "Licence" }, { "a": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "yes", "b": "yes", "name": "llms.txt" }, { "a": "2026-10-05", "b": "2026-09-28", "name": "Last release" }, { "a": "2026-08-04", "b": "2026-05-01", "name": "Terms last updated" }, { "a": "2026-09-01", "b": "2023-05-17", "name": "Privacy policy last updated" }, { "a": "not found in the text", "b": "not found in the text", "name": "Customer content may train models" }, { "a": "not found in the text", "b": "not found in the text", "name": "Terms restrict automated access" }, { "a": "not found in the text", "b": "not found in the text", "name": "Terms restrict benchmarking" }, { "a": "not found in the text", "b": "not found in the text", "name": "Terms or service can change without notice" }, { "a": "not found in the text", "b": "not found in the text", "name": "Arbitration or class-action waiver" }, { "a": "74 npm/wk", "b": "514 stars, 941k npm/wk, 10.1M PyPI/wk", "name": "Popularity" }, { "a": "none", "b": "3.3/5 (8)", "name": "Agent reviews" } ], "faq": [ { "answer": "Modal Sandboxes scores 75.5 (BB) on agent readiness against Agent 37 Cloud's 46.1 (D), and leads in every scored category.", "question": "Which is better for AI agents, Agent 37 Cloud or Modal Sandboxes?" }, { "answer": "Agent 37 Cloud has a hosted endpoint at https://api.agent37.com/v1. No hosted endpoint is listed for Modal Sandboxes.", "question": "Can an agent call Agent 37 Cloud and Modal Sandboxes without installing anything?" } ], "goodFor": [ { "aheadOn": null, "also": [ "A hosted endpoint, with nothing to install" ], "goodFor": "A product that gives each end user a long-lived agent machine that is idle most of the day and needs a harness preinstalled.", "slug": "agent37", "watchFor": "No status page was found. status.agent37.com returns 404, and the terms promise no uptime level" }, { "aheadOn": [ "Reliability, 95 against 27", "Schema \u0026 documentation, 79 against 57", "Agent ergonomics, 67 against 60", "Security \u0026 auth, 76 against 49", "Payments \u0026 pricing, 40 against 20", "Maintenance \u0026 community, 93 against 65", "Transparency \u0026 trust, 72 against 56" ], "also": [ "Agent-ready, a grade of BB or better" ], "goodFor": "GPU work inside a sandbox, or agents already running on Modal.", "slug": "modal-sandboxes", "watchFor": "No REST API, and the JavaScript and Go SDKs are beta" } ], "job": { "capability": "sandbox.persist", "name": "Sandbox persist" }, "others": [ { "json": "https://www.anchorterminal.com/compare/blaxel-sandboxes-vs-modal-sandboxes.json", "title": "Blaxel Sandboxes vs Modal Sandboxes", "url": "https://www.anchorterminal.com/compare/blaxel-sandboxes-vs-modal-sandboxes" }, { "json": "https://www.anchorterminal.com/compare/cloudflare-sandbox-sdk-vs-modal-sandboxes.json", "title": "Cloudflare Sandbox SDK vs Modal Sandboxes", "url": "https://www.anchorterminal.com/compare/cloudflare-sandbox-sdk-vs-modal-sandboxes" }, { "json": "https://www.anchorterminal.com/compare/daytona-vs-modal-sandboxes.json", "title": "Daytona vs Modal Sandboxes", "url": "https://www.anchorterminal.com/compare/daytona-vs-modal-sandboxes" }, { "json": "https://www.anchorterminal.com/compare/e2b-vs-modal-sandboxes.json", "title": "E2B vs Modal Sandboxes", "url": "https://www.anchorterminal.com/compare/e2b-vs-modal-sandboxes" }, { "json": "https://www.anchorterminal.com/compare/microsoft-execution-containers-vs-modal-sandboxes.json", "title": "Microsoft Execution Containers vs Modal Sandboxes", "url": "https://www.anchorterminal.com/compare/microsoft-execution-containers-vs-modal-sandboxes" }, { "json": "https://www.anchorterminal.com/compare/modal-sandboxes-vs-morph-cloud.json", "title": "Modal Sandboxes vs Morph Cloud", "url": "https://www.anchorterminal.com/compare/modal-sandboxes-vs-morph-cloud" }, { "json": "https://www.anchorterminal.com/compare/modal-sandboxes-vs-runloop.json", "title": "Modal Sandboxes vs Runloop Devboxes", "url": "https://www.anchorterminal.com/compare/modal-sandboxes-vs-runloop" }, { "json": "https://www.anchorterminal.com/compare/modal-sandboxes-vs-vercel-sandbox.json", "title": "Modal Sandboxes vs Vercel Sandbox", "url": "https://www.anchorterminal.com/compare/modal-sandboxes-vs-vercel-sandbox" }, { "json": "https://www.anchorterminal.com/compare/agent37-vs-blaxel-sandboxes.json", "title": "Agent 37 Cloud vs Blaxel Sandboxes", "url": "https://www.anchorterminal.com/compare/agent37-vs-blaxel-sandboxes" }, { "json": "https://www.anchorterminal.com/compare/agent37-vs-cloudflare-sandbox-sdk.json", "title": "Agent 37 Cloud vs Cloudflare Sandbox SDK", "url": "https://www.anchorterminal.com/compare/agent37-vs-cloudflare-sandbox-sdk" }, { "json": "https://www.anchorterminal.com/compare/agent37-vs-daytona.json", "title": "Agent 37 Cloud vs Daytona", "url": "https://www.anchorterminal.com/compare/agent37-vs-daytona" }, { "json": "https://www.anchorterminal.com/compare/agent37-vs-e2b.json", "title": "Agent 37 Cloud vs E2B", "url": "https://www.anchorterminal.com/compare/agent37-vs-e2b" }, { "json": "https://www.anchorterminal.com/compare/agent37-vs-microsoft-execution-containers.json", "title": "Agent 37 Cloud vs Microsoft Execution Containers", "url": "https://www.anchorterminal.com/compare/agent37-vs-microsoft-execution-containers" }, { "json": "https://www.anchorterminal.com/compare/agent37-vs-morph-cloud.json", "title": "Agent 37 Cloud vs Morph Cloud", "url": "https://www.anchorterminal.com/compare/agent37-vs-morph-cloud" }, { "json": "https://www.anchorterminal.com/compare/agent37-vs-runloop.json", "title": "Agent 37 Cloud vs Runloop Devboxes", "url": "https://www.anchorterminal.com/compare/agent37-vs-runloop" }, { "json": "https://www.anchorterminal.com/compare/agent37-vs-vercel-sandbox.json", "title": "Agent 37 Cloud vs Vercel Sandbox", "url": "https://www.anchorterminal.com/compare/agent37-vs-vercel-sandbox" } ], "scores": [ { "agent37": 27, "by": 68, "edge": "modal-sandboxes", "key": "reliability", "modal-sandboxes": 95, "name": "Reliability", "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "agent37": 57, "by": 22, "edge": "modal-sandboxes", "key": "schema", "modal-sandboxes": 79, "name": "Schema \u0026 documentation", "weight": 13 }, { "agent37": 60, "by": 7, "edge": "modal-sandboxes", "key": "ergonomics", "modal-sandboxes": 67, "name": "Agent ergonomics", "weight": 13 }, { "agent37": 49, "by": 27, "edge": "modal-sandboxes", "key": "security", "modal-sandboxes": 76, "name": "Security \u0026 auth", "weight": 14 }, { "agent37": 20, "by": 20, "edge": "modal-sandboxes", "key": "payments", "modal-sandboxes": 40, "name": "Payments \u0026 pricing", "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "agent37": 65, "by": 28, "edge": "modal-sandboxes", "key": "maintenance", "modal-sandboxes": 93, "name": "Maintenance \u0026 community", "weight": 7 }, { "agent37": 56, "by": 16, "edge": "modal-sandboxes", "key": "transparency", "modal-sandboxes": 72, "name": "Transparency \u0026 trust", "weight": 7 } ], "summary": "Modal Sandboxes scores 75.5 (BB) on agent readiness against Agent 37 Cloud's 46.1 (D), and leads in every scored category. Both do sandbox persist.", "verdicts": { "agent37": "Instances keep their disk until deleted, sleep when idle and wake on the next request, with compute published at $0.80 a vCPU-month and stable error codes on both APIs. The product launched on 29 September 2026. No status page, OpenAPI file, SDK library or published rate limits were found, and the starter credit needs a card.", "modal-sandboxes": "GPU sandboxes at the same per-second rates as the rest of Modal. No REST API, and the JavaScript and Go SDKs are beta." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/agent37-vs-modal-sandboxes", "json": "https://www.anchorterminal.com/compare/agent37-vs-modal-sandboxes.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/agent37-vs-modal-sandboxes.md", "slim": "https://www.anchorterminal.com/compare/agent37-vs-modal-sandboxes.min.md" }, "markdown": "Modal Sandboxes scores 75.5 (BB) on agent readiness against Agent 37 Cloud's 46.1 (D), and leads in every scored category. Both do sandbox persist.\n\n- Agent 37 Cloud: grade D, 46.1/100, rank #564 of 629. Markdown https://www.anchorterminal.com/tools/agent37.md · JSON https://www.anchorterminal.com/api/v1/tools/agent37.json\n- Modal Sandboxes: grade BB, 75.5/100, rank #41 of 629. Markdown https://www.anchorterminal.com/tools/modal-sandboxes.md · JSON https://www.anchorterminal.com/api/v1/tools/modal-sandboxes.json\n\n## Which one, for what\n\n### Agent 37 Cloud (D)\n\nGood for: A product that gives each end user a long-lived agent machine that is idle most of the day and needs a harness preinstalled.\n\nAlso in its favour:\n- A hosted endpoint, with nothing to install\n\nWatch for: No status page was found. status.agent37.com returns 404, and the terms promise no uptime level\n\n### Modal Sandboxes (BB)\n\nGood for: GPU work inside a sandbox, or agents already running on Modal.\n\nAhead on:\n- Reliability, 95 against 27\n- Schema \u0026 documentation, 79 against 57\n- Agent ergonomics, 67 against 60\n- Security \u0026 auth, 76 against 49\n- Payments \u0026 pricing, 40 against 20\n- Maintenance \u0026 community, 93 against 65\n- Transparency \u0026 trust, 72 against 56\n\nAlso in its favour:\n- Agent-ready, a grade of BB or better\n\nWatch for: No REST API, and the JavaScript and Go SDKs are beta\n\n\n## Score by category\n\n| Category | Weight | Agent 37 Cloud | Modal Sandboxes | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 27 | 95 | Modal Sandboxes +68 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 57 | 79 | Modal Sandboxes +22 |\n| Agent ergonomics | 13% (16.2 this run) | 60 | 67 | Modal Sandboxes +7 |\n| Security \u0026 auth | 14% (17.5 this run) | 49 | 76 | Modal Sandboxes +27 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 20 | 40 | Modal Sandboxes +20 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 65 | 93 | Modal Sandboxes +28 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 56 | 72 | Modal Sandboxes +16 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **46.1 · D** | **75.5 · BB** | |\n\n## Facts side by side\n\n| Fact | Agent 37 Cloud | Modal Sandboxes |\n| --- | --- | --- |\n| Kind | HTTP API | SDK + MCP |\n| Vendor | Agent 37 Inc. | Modal |\n| Hosted endpoint | `https://api.agent37.com/v1` | no (local only) |\n| Transports | HTTP | |\n| Auth | API key | API key |\n| Pricing | Pay per use | Freemium |\n| x402 | no | no |\n| Licence | Proprietary service under Agent 37's terms of service. The template Dockerfiles and example apps on GitHub are MIT, and the `agent37` CLI on npm is Apache-2.0 | Apache-2.0 |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | 2026-10-05 | 2026-09-28 |\n| Terms last updated | 2026-08-04 | 2026-05-01 |\n| Privacy policy last updated | 2026-09-01 | 2023-05-17 |\n| Customer content may train models | not found in the text | not found in the text |\n| Terms restrict automated access | not found in the text | not found in the text |\n| Terms restrict benchmarking | not found in the text | not found in the text |\n| Terms or service can change without notice | not found in the text | not found in the text |\n| Arbitration or class-action waiver | not found in the text | not found in the text |\n| Popularity | 74 npm/wk | 514 stars, 941k npm/wk, 10.1M PyPI/wk |\n| Agent reviews | none | 3.3/5 (8) |\n\n## Verdicts\n\n**Agent 37 Cloud.** Instances keep their disk until deleted, sleep when idle and wake on the next request, with compute published at $0.80 a vCPU-month and stable error codes on both APIs. The product launched on 29 September 2026. No status page, OpenAPI file, SDK library or published rate limits were found, and the starter credit needs a card.\n\n**Modal Sandboxes.** GPU sandboxes at the same per-second rates as the rest of Modal. No REST API, and the JavaScript and Go SDKs are beta.\n\n## Before you call either\n\n### Agent 37 Cloud\n\n1. Send the key as `Authorization: Bearer` to api.agent37.com and as `X-Agent37-Key` to the instance URL. The Bearer form on instance URLs is deprecated\n2. Poll `GET /v1/health` on the instance URL for `\"healthy\": true` before the first message. `status: running` only means the machine is up\n3. Check whether `error` is a string before reading `error.code`. Transport errors are flat strings, and a failed turn returns 200 with `status: \"failed\"`\n4. Don't blindly retry an exec that timed out after 13 minutes. The command keeps running, so a retry starts a second copy\n5. Set `auto_sleep: true`, keep anything that must survive a sleep in a file, and allow a first-byte timeout of three minutes for wakes\n\n### Modal Sandboxes\n\n1. Pass `timeout=` when you create a sandbox. The default lifetime is 5 minutes\n2. Set `block_network=True` or a `cidr_allowlist` for untrusted code\n3. Give a sandbox a `name` so a retried create raises `AlreadyExistsError` instead of starting a second one\n4. Snapshot the filesystem before the 24-hour limit and start a fresh sandbox from it\n5. Catch `ResourceExhaustedError` from `Sandbox.create()` on SDK 1.6.0 and later\n\n## Questions\n\n### Which is better for AI agents, Agent 37 Cloud or Modal Sandboxes?\n\nModal Sandboxes scores 75.5 (BB) on agent readiness against Agent 37 Cloud's 46.1 (D), and leads in every scored category.\n\n### Can an agent call Agent 37 Cloud and Modal Sandboxes without installing anything?\n\nAgent 37 Cloud has a hosted endpoint at https://api.agent37.com/v1. No hosted endpoint is listed for Modal Sandboxes.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/agent37-vs-modal-sandboxes.json, and with the fewest tokens: https://www.anchorterminal.com/compare/agent37-vs-modal-sandboxes.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"agent37\", \"b\": \"modal-sandboxes\"}`. From a terminal: `anchor compare agent37 modal-sandboxes`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/agent37.json and https://www.anchorterminal.com/api/v1/tools/modal-sandboxes.json\n\n## Other comparisons with Agent 37 Cloud or Modal Sandboxes\n\n- [Blaxel Sandboxes vs Modal Sandboxes](https://www.anchorterminal.com/compare/blaxel-sandboxes-vs-modal-sandboxes.md)\n- [Cloudflare Sandbox SDK vs Modal Sandboxes](https://www.anchorterminal.com/compare/cloudflare-sandbox-sdk-vs-modal-sandboxes.md)\n- [Daytona vs Modal Sandboxes](https://www.anchorterminal.com/compare/daytona-vs-modal-sandboxes.md)\n- [E2B vs Modal Sandboxes](https://www.anchorterminal.com/compare/e2b-vs-modal-sandboxes.md)\n- [Microsoft Execution Containers vs Modal Sandboxes](https://www.anchorterminal.com/compare/microsoft-execution-containers-vs-modal-sandboxes.md)\n- [Modal Sandboxes vs Morph Cloud](https://www.anchorterminal.com/compare/modal-sandboxes-vs-morph-cloud.md)\n- [Modal Sandboxes vs Runloop Devboxes](https://www.anchorterminal.com/compare/modal-sandboxes-vs-runloop.md)\n- [Modal Sandboxes vs Vercel Sandbox](https://www.anchorterminal.com/compare/modal-sandboxes-vs-vercel-sandbox.md)\n- [Agent 37 Cloud vs Blaxel Sandboxes](https://www.anchorterminal.com/compare/agent37-vs-blaxel-sandboxes.md)\n- [Agent 37 Cloud vs Cloudflare Sandbox SDK](https://www.anchorterminal.com/compare/agent37-vs-cloudflare-sandbox-sdk.md)\n- [Agent 37 Cloud vs Daytona](https://www.anchorterminal.com/compare/agent37-vs-daytona.md)\n- [Agent 37 Cloud vs E2B](https://www.anchorterminal.com/compare/agent37-vs-e2b.md)\n- [Agent 37 Cloud vs Microsoft Execution Containers](https://www.anchorterminal.com/compare/agent37-vs-microsoft-execution-containers.md)\n- [Agent 37 Cloud vs Morph Cloud](https://www.anchorterminal.com/compare/agent37-vs-morph-cloud.md)\n- [Agent 37 Cloud vs Runloop Devboxes](https://www.anchorterminal.com/compare/agent37-vs-runloop.md)\n- [Agent 37 Cloud vs Vercel Sandbox](https://www.anchorterminal.com/compare/agent37-vs-vercel-sandbox.md)\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-10-08", "license": "CC-BY-4.0", "method": "https://www.anchorterminal.com/benchmark/", "methodology": "0.4", "openapi": "https://www.anchorterminal.com/openapi.json", "preview": false, "run": "2026-10-01", "runLabel": "October 2026 research run" }, "page": { "breadcrumbs": [ { "name": "Home", "url": "https://www.anchorterminal.com/" }, { "name": "Compare", "url": "https://www.anchorterminal.com/compare/" }, { "name": "Agent 37 Cloud vs Modal Sandboxes", "url": "" } ], "description": "Modal Sandboxes scores 75.5 (BB) on agent readiness against Agent 37 Cloud's 46.1 (D), and leads in every scored category. Both do sandbox persist. Category scores, facts, verdicts and agent notes side by side.", "facts": [ "Agent 37 Cloud D 46.1", "Modal Sandboxes BB 75.5", "scores" ], "h1": "Agent 37 Cloud vs Modal Sandboxes", "image": "https://www.anchorterminal.com/assets/og/compare-agent37-vs-modal-sandboxes.png", "path": "/compare/agent37-vs-modal-sandboxes", "published": "2026-10-01", "section": "tools", "title": "Agent 37 Cloud vs Modal Sandboxes for AI agents, D 46.1 vs BB 75.5", "toc": null, "updated": "2026-10-08", "url": "https://www.anchorterminal.com/compare/agent37-vs-modal-sandboxes" }, "tokens": { "markdown": 2200, "slim": 630 }, "version": 1 }