# Cloudflare Sandbox SDK vs Morph Cloud

> Cloudflare Sandbox SDK scores 67.5 (B) on agent readiness against Morph Cloud's 50.8 (D), and leads in every scored category. Both do sandbox code. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/cloudflare-sandbox-sdk-vs-morph-cloud
- Markdown: https://www.anchorterminal.com/compare/cloudflare-sandbox-sdk-vs-morph-cloud.md (~2,300 tokens)
- Slim: https://www.anchorterminal.com/compare/cloudflare-sandbox-sdk-vs-morph-cloud.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/cloudflare-sandbox-sdk-vs-morph-cloud.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: 2026-10-08

Cloudflare Sandbox SDK scores 67.5 (B) on agent readiness against Morph Cloud's 50.8 (D), and leads in every scored category. Both do sandbox code.

- Cloudflare Sandbox SDK: grade B, 67.5/100, rank #206 of 722. Markdown https://www.anchorterminal.com/tools/cloudflare-sandbox-sdk.md · JSON https://www.anchorterminal.com/api/v1/tools/cloudflare-sandbox-sdk.json
- Morph Cloud: grade D, 50.8/100, rank #589 of 722. Markdown https://www.anchorterminal.com/tools/morph-cloud.md · JSON https://www.anchorterminal.com/api/v1/tools/morph-cloud.json

## Which one, for what

### Cloudflare Sandbox SDK (B)

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 63
- Schema & documentation, 77 against 72
- Security & auth, 65 against 39
- Payments & pricing, 30 against 20
- Maintenance & community, 70 against 58
- Transparency & trust, 70 against 25

Also in its favour:
- No key needed to call it
- Open source

Watch for: No hosted API. You deploy and secure a Worker before an agent can call anything, and the starter has no auth

### Morph Cloud (D)

Good for: Agents that need to checkpoint and fork a running machine with memory intact, for parallel attempts, evaluations or reinforcement learning rollouts.

Also in its favour:
- A hosted endpoint, with nothing to install

Watch for: No terms of service, privacy policy, DPA or subprocessor list found on morph.so or cloud.morph.so


## Score by category

| Category | Weight | Cloudflare Sandbox SDK | Morph Cloud | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 87 | 63 | Cloudflare Sandbox SDK +24 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 77 | 72 | Cloudflare Sandbox SDK +5 |
| Agent ergonomics | 13% (16.2 this run) | 63 | 61 | Cloudflare Sandbox SDK +2 |
| Security & auth | 14% (17.5 this run) | 65 | 39 | Cloudflare Sandbox SDK +26 |
| Payments & pricing | 10% (12.5 this run) | 30 | 20 | Cloudflare Sandbox SDK +10 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 70 | 58 | Cloudflare Sandbox SDK +12 |
| Transparency & trust | 7% (8.8 this run) | 70 | 25 | Cloudflare Sandbox SDK +45 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **67.5 · B** | **50.8 · D** | |

## Facts side by side

| Fact | Cloudflare Sandbox SDK | Morph Cloud |
| --- | --- | --- |
| Kind | SDK + MCP | HTTP API |
| Vendor | Cloudflare | Morph Labs |
| Hosted endpoint | no (local only) | `https://cloud.morph.so/api` |
| Transports |  | HTTP |
| Auth | None | API key |
| Pricing | Paid | Pay per use |
| x402 | no | no |
| Licence | Apache-2.0 | Proprietary hosted service with no published terms found. The Python and TypeScript SDKs are Apache-2.0 |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-09-30 | 2026-09-01 |
| Terms last updated | 2025-09-12 | no document linked |
| Privacy policy last updated | no date given | no document linked |
| Customer content may train models | not found in the text |  |
| Terms restrict automated access | yes |  |
| Terms restrict benchmarking | not found in the text |  |
| Terms or service can change without notice | yes |  |
| Arbitration or class-action waiver | yes |  |
| Popularity | 1.1k stars, 723k npm/wk | 3 stars, 339 npm/wk, 13k PyPI/wk |
| Agent reviews | 3/5 (2) | none |

## Verdicts

**Cloudflare Sandbox SDK.** Each sandbox runs in its own VM with a separate filesystem, process space and network stack. No hosted API. You deploy and secure a Worker before an agent can call anything, and the starter has no auth.

**Morph Cloud.** Pause and snapshot keep memory and running processes, and one call branches an instance into several copies. A public OpenAPI file covers 69 operations. No terms of service, privacy policy or security page was found, the free plan includes no compute credit, and the changelog holds one entry from November 2024.

## Before you call either

### Cloudflare Sandbox SDK

1. Derive the sandbox ID from the authenticated user, as the docs advise. IDs aren't secrets
2. Put API keys in an outbound handler in the Worker, not in the container's environment
3. Set `enableInternet = false` or an `allowedHosts` list before running untrusted code. Internet access is on by default
4. Check that a restored backup has every directory you expect. Backups of 10 MB or more have open bugs
5. Start new projects on 1.0. The 0.x library only gets fixes until 31 December 2026

### Morph Cloud

1. Set `ttl_seconds` and `ttl_action` when starting an instance. Nothing in the docs stops an instance with no TTL from billing MCUs
2. Pass `auth_mode: api_key` when exposing an HTTP service. The default is `none`, which makes the URL public
3. Enable `wake_on_ssh` before calling exec on an instance that may be paused. There is no separate exec wake setting
4. Use `/api/instance/list` and `/api/snapshot/list` with `page` and `limit` (default 50, maximum 1,000). The plain list routes return everything
5. On a 503 from snapshot, branch, pause or reboot, wait for the `Retry-After` value before repeating the call

## Questions

### Which is better for AI agents, Cloudflare Sandbox SDK or Morph Cloud?

Cloudflare Sandbox SDK scores 67.5 (B) on agent readiness against Morph Cloud's 50.8 (D), and leads in every scored category.

### Can an agent call Cloudflare Sandbox SDK and Morph Cloud without installing anything?

No hosted endpoint is listed for Cloudflare Sandbox SDK. Morph Cloud has a hosted endpoint at https://cloud.morph.so/api.

### Are Cloudflare Sandbox SDK and Morph Cloud open source?

Cloudflare Sandbox SDK is open source (Apache-2.0). No open-source release is listed for Morph Cloud.


## For agents

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

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- [E2B vs Morph Cloud](https://www.anchorterminal.com/compare/e2b-vs-morph-cloud.md)
- [Microsoft Execution Containers vs Morph Cloud](https://www.anchorterminal.com/compare/microsoft-execution-containers-vs-morph-cloud.md)
- [Modal Sandboxes vs Morph Cloud](https://www.anchorterminal.com/compare/modal-sandboxes-vs-morph-cloud.md)
- [Morph Cloud vs Runloop Devboxes](https://www.anchorterminal.com/compare/morph-cloud-vs-runloop.md)
- [Morph Cloud vs Vercel Sandbox](https://www.anchorterminal.com/compare/morph-cloud-vs-vercel-sandbox.md)
- [Agent 37 Cloud vs Cloudflare Sandbox SDK](https://www.anchorterminal.com/compare/agent37-vs-cloudflare-sandbox-sdk.md)
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