# Agent 37 Cloud vs Together Code Sandbox

> Together Code Sandbox scores 53.6 (D) on agent readiness against Agent 37 Cloud's 46.1 (D), and leads in 4 of 7 scored categories. Both do sandbox persist. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/agent37-vs-together-code-sandbox
- Markdown: https://www.anchorterminal.com/compare/agent37-vs-together-code-sandbox.md (~2,650 tokens)
- Slim: https://www.anchorterminal.com/compare/agent37-vs-together-code-sandbox.min.md (~630 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/agent37-vs-together-code-sandbox.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
- Updated: 2026-10-09

Together Code Sandbox scores 53.6 (D) on agent readiness against Agent 37 Cloud's 46.1 (D), and leads in 4 of 7 scored categories. Both do sandbox persist.

- Agent 37 Cloud: grade D, 46.1/100, rank #759 of 842. Markdown https://www.anchorterminal.com/tools/agent37.md · JSON https://www.anchorterminal.com/api/v1/tools/agent37.json
- Together Code Sandbox: grade D, 53.6/100, rank #628 of 842. Markdown https://www.anchorterminal.com/tools/together-code-sandbox.md · JSON https://www.anchorterminal.com/api/v1/tools/together-code-sandbox.json

## 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

### Together Code Sandbox (D)

Good for: Teams already buying from Together, and former CodeSandbox SDK users, who want Docker-defined sandboxes with disk and memory snapshots from Python or TypeScript.

Ahead on:
- Schema & documentation, 86 against 57
- Agent ergonomics, 70 against 60
- Maintenance & community, 83 against 65

Watch for: The SDK and CLI work only for organisations Together has enabled, and the docs say to contact Together for access


## Score by category

| Category | Weight | Agent 37 Cloud | Together Code Sandbox | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 27 | 25 | Agent 37 Cloud +2 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 57 | 86 | Together Code Sandbox +29 |
| Agent ergonomics | 13% (16.2 this run) | 60 | 70 | Together Code Sandbox +10 |
| Security & auth | 14% (17.5 this run) | 49 | 47 | Agent 37 Cloud +2 |
| Payments & pricing | 10% (12.5 this run) | 20 | 20 | even |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 65 | 83 | Together Code Sandbox +18 |
| Transparency & trust | 7% (8.8 this run) | 56 | 60 | Together Code Sandbox +4 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **46.1 · D** | **53.6 · D** | |

## Facts side by side

| Fact | Agent 37 Cloud | Together Code Sandbox |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Agent 37 Inc. | Together AI |
| Hosted endpoint | `https://api.agent37.com/v1` | `https://api.bartender.codesandbox.io` |
| Transports | HTTP | HTTP |
| Auth | API key | API key |
| Pricing | Pay per use | Pay per use |
| 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 | Proprietary service under Together's terms of service. The SDKs, CLI and OpenAPI documents on GitHub are MIT |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-10-05 | 2026-10-07 |
| Terms last updated | 2026-08-04 | no date given |
| Privacy policy last updated | 2026-09-01 | no date given |
| Customer content may train models | not found in the text | not found in the text |
| Terms restrict automated access | not found in the text | not found in the text |
| Terms restrict benchmarking | not found in the text | yes |
| Terms or service can change without notice | not found in the text | not found in the text |
| Arbitration or class-action waiver | not found in the text | not found in the text |
| Popularity | 74 npm/wk | 3 stars, 1.3k npm/wk, 3.4k PyPI/wk |

## 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.

**Together Code Sandbox.** Two public OpenAPI documents, MIT clients for Python and TypeScript, cursor pagination and built-in retries make the surface easy for an agent to drive. Access is the limit. Together enables the SDK per organisation on request, publishes no rate limits or SLA, and neither status page names the sandbox service.

## 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

### Together Code Sandbox

1. Confirm the organisation is on Together's allowlist before installing. A valid `TOGETHER_API_KEY` alone is not enough
2. Build a snapshot first with `snapshots.create`. No default image exists, and every sandbox needs `snapshot_id` or `snapshot_alias`
3. Set `ttl` at creation or call `terminate()`. Nothing stops a sandbox otherwise, and closing the Python client leaves it running
4. Store the snapshot alias, not the sandbox ID. A terminated sandbox can't restart, and its state lives at `sandbox:<id>`
5. Exclude `snapshots.create` from retries with `should_retry`, and set `experimental.network_policy` before serving anything private on a port

## Questions

### Which is better for AI agents, Agent 37 Cloud or Together Code Sandbox?

Together Code Sandbox scores 53.6 (D) on agent readiness against Agent 37 Cloud's 46.1 (D), and leads in 4 of 7 scored categories.

### Do Agent 37 Cloud and Together Code Sandbox need an API key?

Both need an API key.

### Can an agent call Agent 37 Cloud and Together Code Sandbox without installing anything?

Yes. Agent 37 Cloud has a hosted endpoint at https://api.agent37.com/v1 and Together Code Sandbox at https://api.bartender.codesandbox.io.


## For agents

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

## Other comparisons with Agent 37 Cloud or Together Code Sandbox

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