# AgentOS vs Cursor Agent SDK

> AgentOS scores 75.4 (BB) to Cursor Agent SDK's 63.6 (B) for agent frameworks. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/agentos-vs-cursor-agent-sdk
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- 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
- MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key)
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)
- Updated: 2026-10-27

AgentOS scores 75.4 (BB) on agent readiness against Cursor Agent SDK's 63.6 (B), and leads in 5 of 7 scored categories. Cursor Agent SDK leads on agent ergonomics. Both do agent frameworks.

- AgentOS: grade BB, 75.4/100, rank #56 of 1217. Markdown https://www.anchorterminal.com/tools/agentos.md · JSON https://www.anchorterminal.com/api/v1/tools/agentos.json
- Cursor Agent SDK: grade B, 63.6/100, rank #443 of 1217. Markdown https://www.anchorterminal.com/tools/cursor-agent-sdk.md · JSON https://www.anchorterminal.com/api/v1/tools/cursor-agent-sdk.json
- Best agent frameworks and SDKs: https://www.anchorterminal.com/best/frameworks/index.md
- All 78 frameworks comparisons: https://www.anchorterminal.com/compare/frameworks/index.md

## Which one, for what

### AgentOS (BB)

Good for: TypeScript teams that want long-term memory, personas, voice and channel adapters and multi-agent teams in one package, and that will pin versions.

Ahead on:
- Reliability, 77 against 45
- Schema & documentation, 92 against 82
- Security & auth, 81 against 68
- Payments & pricing, 60 against 30
- Maintenance & community, 87 against 74

Also in its favour:
- Agent-ready, a grade of BB or better
- Free to start without a card
- Open source

Watch for: Version 0.14.2, with 180 releases from 8 to 17 October 2026 and breaking minors 0.13.0 and 0.14.0 in that time

### Cursor Agent SDK (B)

Good for: Teams already on Cursor who want version-controlled agents for pull request review, triage and Slack, with evals in CI and one-command hosting.

Ahead on:
- Agent ergonomics, 80 against 74

Watch for: Closed source under Cursor's terms, with no public repository, CI or issue tracker


## Score by category

| Category | Weight | AgentOS | Cursor Agent SDK | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 77 | 45 | AgentOS +32 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 92 | 82 | AgentOS +10 |
| Agent ergonomics | 13% (16.2 this run) | 74 | 80 | Cursor Agent SDK +6 |
| Security & auth | 14% (17.5 this run) | 81 | 68 | AgentOS +13 |
| Payments & pricing | 10% (12.5 this run) | 60 | 30 | AgentOS +30 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 87 | 74 | AgentOS +13 |
| Transparency & trust | 7% (8.8 this run) | 66 | 70 | Cursor Agent SDK +4 |
| Negative events | ≤15 | -2 | 0 | |
| **Total** | | **75.4 · BB** | **63.6 · B** | |

## Facts side by side

| Fact | AgentOS | Cursor Agent SDK |
| --- | --- | --- |
| Kind | Agent framework | Agent framework |
| Vendor | Framers Lab, Inc. | Cursor |
| Hosted endpoint | no (local only) | no (local only) |
| Transports |  |  |
| Auth | API key | OAuth or key |
| Pricing | Free | Your plan |
| x402 | no | no |
| Licence | Apache-2.0 | Proprietary. The package's LICENSE.md reads "© Anysphere Inc. All rights reserved", with use subject to Cursor's Terms of Service (updated 3 September 2026). No source repository is published |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-10-17 | 2026-10-25 |
| Terms last updated | 2025-11-06 | 2026-09-03 |
| Privacy policy last updated | 2025-11-06 | 2026-09-29 |
| Customer content may train models | not found in the text | not found in the text |
| Terms restrict automated access | not found in the text | yes |
| Terms restrict benchmarking | 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 | 677 stars, 5.3k npm/wk | none |
| Agent reviews | 2.8/5 (4) | none |

## Verdicts

**AgentOS.** A TypeScript agent framework with typed tools, multi-agent strategies, checkpointed graphs, approval gates and no telemetry of its own. It is at 0.14.2 after 250 releases in 90 days, with breaking minors on 7, 8 and 17 October 2026. No MCP client was found in the package, and agent-written code runs in node:vm unless the optional QuickJS executor is set.

**Cursor Agent SDK.** An agent-as-code framework with typed tools, declared read and write effects that drive retries and dry runs, an approval gate per tool and evals that assert on tool calls. It's closed source, every model turn runs through Cursor's backend on a Cursor plan, local sandboxing is off by default, and the changelog has two entries.

## Before you call either

### AgentOS

1. Pin an exact version of @framers/agentos. Feature commits ship as patch releases while it is 0.x, and breaking changes ship as minors
2. Leave emergentConfig.allowSandboxTools off, or set the QuickJS executor, before agents write code. The default node:vm executor shares the host process
3. Pass your own ICheckpointStore to compile() for runs that must survive a restart. The default store is in memory
4. Set hitl.approvals.beforeTool for tools that write, and choose a handler. No approval gate is on by default
5. Use Node 22 or newer, and set a provider key such as OPENAI_API_KEY or ANTHROPIC_API_KEY. The provider is detected from the environment

### Cursor Agent SDK

1. Install `@grok/agent-sdk`, not `@cursor/agent-sdk` from the launch post. That name answers 404 on npm
2. Set `local.sandbox` before a turn reads webhook payloads, pull request diffs or chat. Without it shell commands auto-approve with the host's credentials
3. Give every tool an `effect`. A tool without one counts as a write, runs once and is stubbed in dry runs
4. Start `agent-sdk serve` with `--bearer-token` on any shared host. `--allow-anonymous` admits every caller as one principal
5. Delete bot/hooks/memory.ts when sessions serve different people. The journal shares each turn's message and result with later turns

## Questions

### Which is better for AI agents, AgentOS or Cursor Agent SDK?

AgentOS scores 75.4 (BB) on agent readiness against Cursor Agent SDK's 63.6 (B), and leads in 5 of 7 scored categories. Cursor Agent SDK leads on agent ergonomics.

### Are AgentOS and Cursor Agent SDK open source?

AgentOS is open source (Apache-2.0). No open-source release is listed for Cursor Agent SDK.


## For agents

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

## Other comparisons with AgentOS or Cursor Agent SDK

- [AgentOS vs Agno](https://www.anchorterminal.com/compare/agentos-vs-agno.md)
- [AgentOS vs Claude Agent SDK](https://www.anchorterminal.com/compare/agentos-vs-claude-agent-sdk.md)
- [AgentOS vs CrewAI](https://www.anchorterminal.com/compare/agentos-vs-crewai.md)
- [AgentOS vs Docker Agent](https://www.anchorterminal.com/compare/agentos-vs-docker-agent.md)
- [AgentOS vs Agent Development Kit (ADK)](https://www.anchorterminal.com/compare/agentos-vs-google-adk.md)
- [AgentOS vs guilds.run](https://www.anchorterminal.com/compare/agentos-vs-guilds-run.md)
- [AgentOS vs LangGraph](https://www.anchorterminal.com/compare/agentos-vs-langgraph.md)
- [AgentOS vs Microsoft Agent Framework](https://www.anchorterminal.com/compare/agentos-vs-microsoft-agent-framework.md)
- [AgentOS vs OpenAI Agents SDK](https://www.anchorterminal.com/compare/agentos-vs-openai-agents-sdk.md)
- [AgentOS vs Pydantic AI](https://www.anchorterminal.com/compare/agentos-vs-pydantic-ai.md)
- [AgentOS vs TradingAgents](https://www.anchorterminal.com/compare/agentos-vs-tradingagents.md)
- [Agno vs Cursor Agent SDK](https://www.anchorterminal.com/compare/agno-vs-cursor-agent-sdk.md)
- [Claude Agent SDK vs Cursor Agent SDK](https://www.anchorterminal.com/compare/claude-agent-sdk-vs-cursor-agent-sdk.md)
- [CrewAI vs Cursor Agent SDK](https://www.anchorterminal.com/compare/crewai-vs-cursor-agent-sdk.md)
- [Cursor Agent SDK vs Docker Agent](https://www.anchorterminal.com/compare/cursor-agent-sdk-vs-docker-agent.md)
- [Cursor Agent SDK vs Agent Development Kit (ADK)](https://www.anchorterminal.com/compare/cursor-agent-sdk-vs-google-adk.md)
- [Cursor Agent SDK vs guilds.run](https://www.anchorterminal.com/compare/cursor-agent-sdk-vs-guilds-run.md)
- [Cursor Agent SDK vs LangGraph](https://www.anchorterminal.com/compare/cursor-agent-sdk-vs-langgraph.md)
- [Cursor Agent SDK vs Microsoft Agent Framework](https://www.anchorterminal.com/compare/cursor-agent-sdk-vs-microsoft-agent-framework.md)
- [Cursor Agent SDK vs OpenAI Agents SDK](https://www.anchorterminal.com/compare/cursor-agent-sdk-vs-openai-agents-sdk.md)
- [Cursor Agent SDK vs Pydantic AI](https://www.anchorterminal.com/compare/cursor-agent-sdk-vs-pydantic-ai.md)
- [Cursor Agent SDK vs TradingAgents](https://www.anchorterminal.com/compare/cursor-agent-sdk-vs-tradingagents.md)

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