# Agent 37 Cloud vs Cloudflare Sandbox SDK (slim)

> Cloudflare Sandbox SDK scores 67.5 (B) 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.

- Full: https://www.anchorterminal.com/compare/agent37-vs-cloudflare-sandbox-sdk.md (~2,350 tokens) · this version ~680 tokens · JSON https://www.anchorterminal.com/compare/agent37-vs-cloudflare-sandbox-sdk.json · canonical https://www.anchorterminal.com/compare/agent37-vs-cloudflare-sandbox-sdk
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-08

Cloudflare Sandbox SDK scores 67.5 (B) on agent readiness against Agent 37 Cloud's 46.1 (D), and leads in every scored category. Both do sandbox persist.

- Agent 37 Cloud: D 46.1, rank #564 of 629 · https://www.anchorterminal.com/tools/agent37.min.md
- Cloudflare Sandbox SDK: B 67.5, rank #191 of 629 · https://www.anchorterminal.com/tools/cloudflare-sandbox-sdk.min.md
- Agent 37 Cloud, 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. Also A hosted endpoint, with nothing to install.
- Cloudflare Sandbox SDK, good for Agents already built on Workers and Durable Objects that want sandboxes in the same account with credential injection at the edge. Ahead on Reliability, 87 against 27; Schema & documentation, 77 against 57; Security & auth, 65 against 49; Payments & pricing, 30 against 20; Maintenance & community, 70 against 65; Transparency & trust, 70 against 56. Also No key needed to call it; Open source.

| Category | Agent 37 Cloud | Cloudflare Sandbox SDK |
| --- | --- | --- |
| Reliability (16%) | 27 | 87 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 57 | 77 |
| Agent ergonomics (13%) | 60 | 63 |
| Security & auth (14%) | 49 | 65 |
| Payments & pricing (10%) | 20 | 30 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 65 | 70 |
| Transparency & trust (7%) | 56 | 70 |

| Fact (where they differ) | Agent 37 Cloud | Cloudflare Sandbox SDK |
| --- | --- | --- |
| Kind | HTTP API | SDK + MCP |
| Vendor | Agent 37 Inc. | Cloudflare |
| Hosted endpoint | `https://api.agent37.com/v1` | no (local only) |
| Transports | HTTP |  |
| Auth | API key | None |
| Pricing | Pay per use | Paid |
| 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 |
| Last release | 2026-10-05 | 2026-09-30 |
| Terms last updated | 2026-08-04 | 2025-09-12 |
| Privacy policy last updated | 2026-09-01 | no date given |
| Terms restrict automated access | not found in the text | yes |
| Terms or service can change without notice | not found in the text | yes |
| Arbitration or class-action waiver | not found in the text | yes |
| Popularity | 74 npm/wk | 1.1k stars, 723k npm/wk |
| Agent reviews | none | 3/5 (2) |