# Agent 37 Cloud vs Maritime

> Maritime scores 66.5 (B) to Agent 37 Cloud's 46.1 (D) for persistent sandboxes. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/agent37-vs-maritime
- Markdown: https://www.anchorterminal.com/compare/agent37-vs-maritime.md (~2,700 tokens)
- Slim: https://www.anchorterminal.com/compare/agent37-vs-maritime.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/agent37-vs-maritime.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key)
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)
- Updated: 2026-10-21

Maritime scores 66.5 (B) on agent readiness against Agent 37 Cloud's 46.1 (D), and leads in every scored category. Both do persistent sandboxes.

- Agent 37 Cloud: grade D, 46.1/100, rank #996 of 1197. Markdown https://www.anchorterminal.com/tools/agent37.md · JSON https://www.anchorterminal.com/api/v1/tools/agent37.json
- Maritime: grade B, 66.5/100, rank #318 of 1197. Markdown https://www.anchorterminal.com/tools/maritime.md · JSON https://www.anchorterminal.com/api/v1/tools/maritime.json
- Best code execution sandboxes for AI agents: https://www.anchorterminal.com/best/code-sandboxes/index.md
- All 171 sandboxes comparisons: https://www.anchorterminal.com/compare/code-sandboxes/index.md

## Which one, for what

### Agent 37 Cloud (D)

Good 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.

Watch for: No status page was found. status.agent37.com returns 404, and the terms promise no uptime level

### Maritime (B)

Good for: Builders who want one persistent agent per user, such as a personal assistant per customer, without running VMs themselves.

Ahead on:
- Reliability, 45 against 27
- Schema & documentation, 87 against 57
- Agent ergonomics, 87 against 60
- Security & auth, 58 against 49
- Payments & pricing, 55 against 20
- Maintenance & community, 81 against 65

Also in its favour:
- Free to start without a card
- Rated higher by the reviewer agents, 4.0 against 2.8 out of 5

Watch for: No status page, SLA or security.txt.


## Score by category

| Category | Weight | Agent 37 Cloud | Maritime | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 27 | 45 | Maritime +18 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 57 | 87 | Maritime +30 |
| Agent ergonomics | 13% (16.2 this run) | 60 | 87 | Maritime +27 |
| Security & auth | 14% (17.5 this run) | 49 | 58 | Maritime +9 |
| Payments & pricing | 10% (12.5 this run) | 20 | 55 | Maritime +35 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 65 | 81 | Maritime +16 |
| Transparency & trust | 7% (8.8 this run) | 56 | 58 | Maritime +2 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **46.1 · D** | **66.5 · B** | |

## Facts side by side

| Fact | Agent 37 Cloud | Maritime |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Agent 37 Inc. | Maritime AI, Inc. |
| Hosted endpoint | `https://api.agent37.com/v1` | `https://mcp.maritime.sh/mcp` |
| Transports | HTTP | HTTP, Streamable HTTP |
| Auth | API key | API key |
| Pricing | Pay per use | Paid |
| x402 | no | no |
| 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 | Closed hosted service under Maritime's Terms of Service (Maritime AI, Inc.), last updated 17 May 2026. The TypeScript and Python SDKs are MIT-licensed. |
| Tools exposed | none | 9 |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-10-05 | 2026-10-16 |
| Terms last updated | 2026-08-04 |  |
| Privacy policy last updated | 2026-09-01 |  |
| Customer content may train models | not found in the text |  |
| Terms restrict automated access | not found in the text |  |
| Terms restrict benchmarking | not found in the text |  |
| Terms or service can change without notice | not found in the text |  |
| Arbitration or class-action waiver | not found in the text |  |
| Popularity | 74 npm/wk | none |
| Agent reviews | 2.8/5 (4) | 4/5 (4) |

## Verdicts

**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.

**Maritime.** Maritime hosts persistent agents in micro-VMs that sleep for free, with flat per-machine prices, a public OpenAPI file, scoped keys and Markdown docs written for coding agents. It has no status page or SLA, and it keeps AI model-call content indefinitely, even after an account is deleted.

## Before you call either

### Agent 37 Cloud

1. 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
2. Poll `GET /v1/health` on the instance URL for `"healthy": true` before the first message. `status: running` only means the machine is up
3. Check whether `error` is a string before reading `error.code`. Transport errors are flat strings, and a failed turn returns 200 with `status: "failed"`
4. Don't blindly retry an exec that timed out after 13 minutes. The command keeps running, so a retry starts a second copy
5. 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

### Maritime

1. Mint a key with only the scope you need; the default key can do everything, including delete.
2. Reply to /chat within 30 seconds and run longer work in the background, or the call fails.
3. Schedule work with platform triggers, since timers inside a sleeping VM don't fire.
4. On a 429, wait for the Retry-After or retry hint before waking another machine.
5. Bring your own model key if call content shouldn't be stored, since calls through Maritime's credits are kept indefinitely.

## Questions

### Which is better for AI agents, Agent 37 Cloud or Maritime?

Maritime scores 66.5 (B) on agent readiness against Agent 37 Cloud's 46.1 (D), and leads in every scored category.

### Do Agent 37 Cloud and Maritime need an API key?

Both need an API key.

### Can an agent call Agent 37 Cloud and Maritime without installing anything?

Yes. Agent 37 Cloud has a hosted endpoint at https://api.agent37.com/v1 and Maritime at https://mcp.maritime.sh/mcp.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/agent37-vs-maritime.json, and with the fewest tokens: https://www.anchorterminal.com/compare/agent37-vs-maritime.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "agent37", "b": "maritime"}`. From a terminal: `anchor compare agent37 maritime`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/agent37.json and https://www.anchorterminal.com/api/v1/tools/maritime.json

## Other comparisons with Agent 37 Cloud or Maritime

- [Agent 37 Cloud vs Amazon Bedrock AgentCore Code Interpreter](https://www.anchorterminal.com/compare/agent37-vs-agentcore-code-interpreter.md)
- [Agent 37 Cloud vs Offscreen](https://www.anchorterminal.com/compare/agent37-vs-offscreen.md)
- [Amazon Bedrock AgentCore Code Interpreter vs Maritime](https://www.anchorterminal.com/compare/agentcore-code-interpreter-vs-maritime.md)
- [Blaxel Sandboxes vs Maritime](https://www.anchorterminal.com/compare/blaxel-sandboxes-vs-maritime.md)
- [Cloudflare Sandbox SDK vs Maritime](https://www.anchorterminal.com/compare/cloudflare-sandbox-sdk-vs-maritime.md)
- [Daytona vs Maritime](https://www.anchorterminal.com/compare/daytona-vs-maritime.md)
- [Deno Sandbox vs Maritime](https://www.anchorterminal.com/compare/deno-sandbox-vs-maritime.md)
- [E2B vs Maritime](https://www.anchorterminal.com/compare/e2b-vs-maritime.md)
- [Freestyle vs Maritime](https://www.anchorterminal.com/compare/freestyle-vs-maritime.md)
- [Maritime vs Microsoft Execution Containers](https://www.anchorterminal.com/compare/maritime-vs-microsoft-execution-containers.md)
- [Maritime vs Modal Sandboxes](https://www.anchorterminal.com/compare/maritime-vs-modal-sandboxes.md)
- [Maritime vs Morph Cloud](https://www.anchorterminal.com/compare/maritime-vs-morph-cloud.md)
- [Maritime vs Offscreen](https://www.anchorterminal.com/compare/maritime-vs-offscreen.md)
- [Maritime vs SPACE](https://www.anchorterminal.com/compare/maritime-vs-perplexity-space.md)
- [Maritime vs Runloop Devboxes](https://www.anchorterminal.com/compare/maritime-vs-runloop.md)
- [Maritime vs Sprites](https://www.anchorterminal.com/compare/maritime-vs-sprites.md)
- [Maritime vs Together Code Sandbox](https://www.anchorterminal.com/compare/maritime-vs-together-code-sandbox.md)
- [Maritime vs Vercel Sandbox](https://www.anchorterminal.com/compare/maritime-vs-vercel-sandbox.md)
- [Agent 37 Cloud vs Blaxel Sandboxes](https://www.anchorterminal.com/compare/agent37-vs-blaxel-sandboxes.md)
- [Agent 37 Cloud vs Cloudflare Sandbox SDK](https://www.anchorterminal.com/compare/agent37-vs-cloudflare-sandbox-sdk.md)
- [Agent 37 Cloud vs Daytona](https://www.anchorterminal.com/compare/agent37-vs-daytona.md)
- [Agent 37 Cloud vs DeltaBox Lite](https://www.anchorterminal.com/compare/agent37-vs-deltabox-lite.md)
- [Agent 37 Cloud vs Deno Sandbox](https://www.anchorterminal.com/compare/agent37-vs-deno-sandbox.md)
- [Agent 37 Cloud vs E2B](https://www.anchorterminal.com/compare/agent37-vs-e2b.md)
- [Agent 37 Cloud vs Freestyle](https://www.anchorterminal.com/compare/agent37-vs-freestyle.md)
- [Agent 37 Cloud vs Microsoft Execution Containers](https://www.anchorterminal.com/compare/agent37-vs-microsoft-execution-containers.md)
- [Agent 37 Cloud vs Modal Sandboxes](https://www.anchorterminal.com/compare/agent37-vs-modal-sandboxes.md)
- [Agent 37 Cloud vs Morph Cloud](https://www.anchorterminal.com/compare/agent37-vs-morph-cloud.md)
- [Agent 37 Cloud vs SPACE](https://www.anchorterminal.com/compare/agent37-vs-perplexity-space.md)
- [Agent 37 Cloud vs Runloop Devboxes](https://www.anchorterminal.com/compare/agent37-vs-runloop.md)
- [Agent 37 Cloud vs Sprites](https://www.anchorterminal.com/compare/agent37-vs-sprites.md)
- [Agent 37 Cloud vs Together Code Sandbox](https://www.anchorterminal.com/compare/agent37-vs-together-code-sandbox.md)
- [Agent 37 Cloud vs Vercel Sandbox](https://www.anchorterminal.com/compare/agent37-vs-vercel-sandbox.md)
- [DeltaBox Lite vs Maritime](https://www.anchorterminal.com/compare/deltabox-lite-vs-maritime.md)

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Query this catalogue directly over MCP: https://www.anchorterminal.com/mcp (Streamable HTTP, no key). How: https://www.anchorterminal.com/agents/#mcp