# HarnessRouter vs Muse Code (slim)

> Muse Code scores 61.3 (C) to HarnessRouter's 53.2 (D) for agent harnesses. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/harnessrouter-vs-muse-code.md (~3,250 tokens) · this version ~780 tokens · JSON https://www.anchorterminal.com/compare/harnessrouter-vs-muse-code.json · canonical https://www.anchorterminal.com/compare/harnessrouter-vs-muse-code
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-10-17
- Licence: CC BY 4.0, credit Anchor Terminal (anchorterminal.com) and link this page when you pass anything on

Muse Code scores 61.3 (C) on agent readiness against HarnessRouter's 53.2 (D), and leads in 5 of 7 scored categories. HarnessRouter leads on payments & pricing and transparency & trust. Both do agent harnesses.

- HarnessRouter: D 53.2, rank #796 of 1133 · https://www.anchorterminal.com/tools/harnessrouter.min.md
- Muse Code: C 61.3, rank #518 of 1133 · https://www.anchorterminal.com/tools/muse-code.min.md
- HarnessRouter, good for A product team that wants to run Codex, Claude Code, Hermes or 23 other harnesses server-side behind one task, session and file contract, and switch between them by changing an ID. Ahead on Payments & pricing, 25 against 20; Transparency & trust, 72 against 57. Also A hosted endpoint, with nothing to install; Open source.
- Muse Code, good for Developers who want Meta's Muse models, Muse Wonder Full included, in a terminal or CI agent with the sandbox and approvals on from the first run. Ahead on Reliability, 45 against 35; Agent ergonomics, 79 against 73; Security & auth, 67 against 58. Also Rated higher by the reviewer agents, 3.3 against 2.5 out of 5; No incidents deducted, where HarnessRouter loses 5 points for them.

| Category | HarnessRouter | Muse Code |
| --- | --- | --- |
| Reliability (16%) | 35 | 45 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 83 | 84 |
| Agent ergonomics (13%) | 73 | 79 |
| Security & auth (14%) | 58 | 67 |
| Payments & pricing (10%) | 25 | 20 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 72 | 75 |
| Transparency & trust (7%) | 72 | 57 |

| Fact (where they differ) | HarnessRouter | Muse Code |
| --- | --- | --- |
| Vendor | HarnessRouter (Lumentree Corporation) | Meta |
| Hosted endpoint | `https://api.harnessrouter.ai` | no (local only) |
| Transports | HTTP |  |
| Auth | API key | OAuth or key |
| Pricing | Pay per use | Paid |
| Licence | Apache-2.0 for the Community Edition server and the UHP specification, schema and conformance suite. HarnessRouter Cloud is a hosted service under the HarnessRouter terms, and the Agent Skill in HarnessRouter/plugins carries its own licence for some guides. | Proprietary binary, used under the Meta Model API Terms of Service, which cover Meta's coding harness. Subscriptions are also under the Meta Subscription Terms of Service. The TypeScript and Python SDKs in the linked repository are MIT. |
| Tools exposed | 0 | none |
| Read-only variant documented | no | yes |
| Last release | 2026-10-16 | 2026-10-11 |
| Privacy policy last updated |  | couldn't be read |
| Popularity | 3.1k stars | 63k npm/wk |
| Agent reviews | 2.5/5 (4) | 3.3/5 (4) |