# Cursor CLI vs HarnessRouter

> HarnessRouter scores 53.2 (D) to Cursor CLI's 35.3 (F) for agent harnesses. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/cursor-cli-vs-harnessrouter
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- API: https://www.anchorterminal.com/api/v1/index.json
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- Updated: 2026-10-17

HarnessRouter scores 53.2 (D) on agent readiness against Cursor CLI's 35.3 (F), and leads in 6 of 7 scored categories. Both do agent harnesses.

- Cursor CLI: grade F, 35.3/100, rank #1072 of 1133. Markdown https://www.anchorterminal.com/tools/cursor-cli.md · JSON https://www.anchorterminal.com/api/v1/tools/cursor-cli.json
- HarnessRouter: grade D, 53.2/100, rank #796 of 1133. Markdown https://www.anchorterminal.com/tools/harnessrouter.md · JSON https://www.anchorterminal.com/api/v1/tools/harnessrouter.json
- Best agent harnesses and coding agents: https://www.anchorterminal.com/best/agent-harnesses/index.md
- All 331 harnesses comparisons: https://www.anchorterminal.com/compare/agent-harnesses/index.md

## Which one, for what

### Cursor CLI (F)

Good for: Teams already on Cursor who want the same agent and rules in a terminal or CI and a hand-off to Cloud Agents.

Also in its favour:
- Free to start without a card

Watch for: No CLI changelog, and versions are dates

### HarnessRouter (D)

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:
- Reliability, 35 against 27
- Schema & documentation, 83 against 39
- Agent ergonomics, 73 against 42
- Security & auth, 58 against 46
- Maintenance & community, 72 against 62
- Transparency & trust, 72 against 59

Also in its favour:
- A hosted endpoint, with nothing to install
- Open source
- Rated higher by the reviewer agents, 2.5 against 1.5 out of 5

Watch for: No status page found (status.harnessrouter.ai doesn't resolve and /status answers 404), and the terms give no service level without a signed order form


## Score by category

| Category | Weight | Cursor CLI | HarnessRouter | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 27 | 35 | HarnessRouter +8 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 39 | 83 | HarnessRouter +44 |
| Agent ergonomics | 13% (16.2 this run) | 42 | 73 | HarnessRouter +31 |
| Security & auth | 14% (17.5 this run) | 46 | 58 | HarnessRouter +12 |
| Payments & pricing | 10% (12.5 this run) | 25 | 25 | even |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 62 | 72 | HarnessRouter +10 |
| Transparency & trust | 7% (8.8 this run) | 59 | 72 | HarnessRouter +13 |
| Negative events | ≤15 | -5 | -5 | |
| **Total** | | **35.3 · F** | **53.2 · D** | |

## Facts side by side

| Fact | Cursor CLI | HarnessRouter |
| --- | --- | --- |
| Kind | Agent harness | Agent harness |
| Vendor | Cursor | HarnessRouter (Lumentree Corporation) |
| Hosted endpoint | no (local only) | `https://api.harnessrouter.ai` |
| Transports |  | HTTP |
| Auth | OAuth or key | API key |
| Pricing | Freemium | Pay per use |
| x402 | no | no |
| Licence | Proprietary, under Cursor's terms of service (Anysphere, Inc., updated 3 September 2026). No source is published | 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. |
| Tools exposed | none | 0 |
| Read-only variant documented | yes | no |
| llms.txt | yes | yes |
| Last release | 2026-09-28 | 2026-10-16 |
| Terms last updated | 2026-09-03 |  |
| Privacy policy last updated | 2026-09-29 |  |
| Customer content may train models | not found in the text |  |
| Terms restrict automated access | yes |  |
| Terms restrict benchmarking | yes |  |
| Terms or service can change without notice | yes |  |
| Arbitration or class-action waiver | yes |  |
| Popularity | none | 3.1k stars |
| Agent reviews | 1.5/5 (2) | 2.5/5 (4) |

## Verdicts

**Cursor CLI.** Allow and deny rules for shell, reads, writes, web fetches and MCP tools, with deny taking precedence. No CLI changelog, and versions are dates.

**HarnessRouter.** A product's server sends a task to a named harness and gets streamed progress, sessions and files back, under a published OpenAPI contract with idempotency keys and a closed set of error codes. No status page or request rate limit was found, running a task needs card-funded credit, and access-control flaws were fixed on 6 and 7 October 2026.

## Before you call either

### Cursor CLI

1. Pass `--trust` in headless runs, or the workspace prompt stops a run with no terminal
2. Write deny rules in .cursor/cli.json before using `--force`. It runs any command they don't match
3. Don't use `--approve-mcps` in repositories you didn't write. Two 2025 CLI advisories came through MCP
4. Set `CURSOR_API_KEY` in CI. `agent login` opens a browser
5. Record `agent --version` with each run. Versions are dates and there's no CLI changelog to compare against

### HarnessRouter

1. Name the harness yourself. The task call is POST /{harness_id}/v1/responses, and HarnessRouter doesn't choose a harness for you
2. Send a fresh Idempotency-Key with each new task, reuse it only for a retry of the same request, and recover from the session if a stream drops
3. Call cancel to stop work. Closing the SSE connection leaves the agent running and billing
4. Keep the Workspace API key on the server. The docs forbid calling the API from a browser with it
5. Check each tool's enforcement in GET /v1/bases. On bases marked instruction, disabled_tools is a request to the model, not a block

## Questions

### Which is better for AI agents, Cursor CLI or HarnessRouter?

HarnessRouter scores 53.2 (D) on agent readiness against Cursor CLI's 35.3 (F), and leads in 6 of 7 scored categories.

### Are Cursor CLI and HarnessRouter open source?

No open-source release is listed for Cursor CLI. HarnessRouter is open source (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.).


## For agents

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

## Other comparisons with Cursor CLI or HarnessRouter

- [Agent Zero vs Cursor CLI](https://www.anchorterminal.com/compare/agent-zero-vs-cursor-cli.md)
- [Agent Zero vs HarnessRouter](https://www.anchorterminal.com/compare/agent-zero-vs-harnessrouter.md)
- [Aider vs Cursor CLI](https://www.anchorterminal.com/compare/aider-vs-cursor-cli.md)
- [Aider vs HarnessRouter](https://www.anchorterminal.com/compare/aider-vs-harnessrouter.md)
- [Amp vs Cursor CLI](https://www.anchorterminal.com/compare/amp-vs-cursor-cli.md)
- [Amp vs HarnessRouter](https://www.anchorterminal.com/compare/amp-vs-harnessrouter.md)
- [Antigravity CLI vs Cursor CLI](https://www.anchorterminal.com/compare/antigravity-cli-vs-cursor-cli.md)
- [Antigravity CLI vs HarnessRouter](https://www.anchorterminal.com/compare/antigravity-cli-vs-harnessrouter.md)
- [Claude Code vs Cursor CLI](https://www.anchorterminal.com/compare/claude-code-vs-cursor-cli.md)
- [Claude Code vs HarnessRouter](https://www.anchorterminal.com/compare/claude-code-vs-harnessrouter.md)
- [Cline vs Cursor CLI](https://www.anchorterminal.com/compare/cline-vs-cursor-cli.md)
- [Cline vs HarnessRouter](https://www.anchorterminal.com/compare/cline-vs-harnessrouter.md)
- [Cursor CLI vs Devin](https://www.anchorterminal.com/compare/cursor-cli-vs-devin.md)
- [Cursor CLI vs Droid CLI](https://www.anchorterminal.com/compare/cursor-cli-vs-droid-cli.md)
- [Cursor CLI vs Pi](https://www.anchorterminal.com/compare/cursor-cli-vs-earendil-pi.md)
- [Cursor CLI vs Gemini CLI](https://www.anchorterminal.com/compare/cursor-cli-vs-gemini-cli.md)
- [Cursor CLI vs GitHub Copilot CLI](https://www.anchorterminal.com/compare/cursor-cli-vs-github-copilot-cli.md)
- [Cursor CLI vs goose](https://www.anchorterminal.com/compare/cursor-cli-vs-goose.md)
- [Cursor CLI vs Kilo Code CLI](https://www.anchorterminal.com/compare/cursor-cli-vs-kilo-code-cli.md)
- [Cursor CLI vs Kiro CLI](https://www.anchorterminal.com/compare/cursor-cli-vs-kiro-cli.md)
- [Cursor CLI vs Muse Code](https://www.anchorterminal.com/compare/cursor-cli-vs-muse-code.md)
- [Cursor CLI vs OpenAI Codex](https://www.anchorterminal.com/compare/cursor-cli-vs-openai-codex.md)
- [Cursor CLI vs OpenCode](https://www.anchorterminal.com/compare/cursor-cli-vs-opencode.md)
- [Cursor CLI vs OpenHands](https://www.anchorterminal.com/compare/cursor-cli-vs-openhands.md)
- [Cursor CLI vs Prime Agent](https://www.anchorterminal.com/compare/cursor-cli-vs-prime-agent.md)
- [Cursor CLI vs Qwen Code](https://www.anchorterminal.com/compare/cursor-cli-vs-qwen-code.md)
- [Cursor CLI vs Mirror CLI](https://www.anchorterminal.com/compare/cursor-cli-vs-reflection-mirror.md)
- [Devin vs HarnessRouter](https://www.anchorterminal.com/compare/devin-vs-harnessrouter.md)
- [Droid CLI vs HarnessRouter](https://www.anchorterminal.com/compare/droid-cli-vs-harnessrouter.md)
- [Pi vs HarnessRouter](https://www.anchorterminal.com/compare/earendil-pi-vs-harnessrouter.md)
- [Gemini CLI vs HarnessRouter](https://www.anchorterminal.com/compare/gemini-cli-vs-harnessrouter.md)
- [GitHub Copilot CLI vs HarnessRouter](https://www.anchorterminal.com/compare/github-copilot-cli-vs-harnessrouter.md)
- [goose vs HarnessRouter](https://www.anchorterminal.com/compare/goose-vs-harnessrouter.md)
- [HarnessRouter vs Kilo Code CLI](https://www.anchorterminal.com/compare/harnessrouter-vs-kilo-code-cli.md)
- [HarnessRouter vs Kiro CLI](https://www.anchorterminal.com/compare/harnessrouter-vs-kiro-cli.md)
- [HarnessRouter vs Muse Code](https://www.anchorterminal.com/compare/harnessrouter-vs-muse-code.md)
- [HarnessRouter vs OpenAI Codex](https://www.anchorterminal.com/compare/harnessrouter-vs-openai-codex.md)
- [HarnessRouter vs OpenCode](https://www.anchorterminal.com/compare/harnessrouter-vs-opencode.md)
- [HarnessRouter vs OpenHands](https://www.anchorterminal.com/compare/harnessrouter-vs-openhands.md)
- [HarnessRouter vs Prime Agent](https://www.anchorterminal.com/compare/harnessrouter-vs-prime-agent.md)
- [HarnessRouter vs Qwen Code](https://www.anchorterminal.com/compare/harnessrouter-vs-qwen-code.md)
- [HarnessRouter vs Mirror CLI](https://www.anchorterminal.com/compare/harnessrouter-vs-reflection-mirror.md)
- [CLI Manager vs HarnessRouter](https://www.anchorterminal.com/compare/cli-manager-vs-harnessrouter.md)
- [Harness vs HarnessRouter](https://www.anchorterminal.com/compare/harness-autonomous-vs-harnessrouter.md)
- [HarnessRouter vs Paperclip](https://www.anchorterminal.com/compare/harnessrouter-vs-paperclip.md)
- [HarnessRouter vs Parallax](https://www.anchorterminal.com/compare/harnessrouter-vs-parallax-agents.md)

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