Agent-ready AI model APIs
We scanned 12 LLM and generative AI APIs developers build on the way an AI agent would, and scored how well ChatGPT, Claude and Perplexity can read each one, sign a team up and connect through the API.
Which AI model API is best for AI agents?
It depends on what you need agents to do. If you want an agent to sign your team up and connect through the API, Together AI scores highest (82/100), followed by OpenRouter (80) and Fireworks AI (78). OpenRouter and Cohere run remote MCP servers agents can connect to directly. OpenAI and xAI block AI agents with a bot wall, so assistants can't read their sites at all. Scores as of 3 Nov 2026.
| # | AI model API | Score /100 | Core /60 | Sign up /40 | API /40 | Bot wall | llms.txt | MCP | OpenAPI | Public pricing | Biggest gap |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Together AIRe-check live | 82 | 55 | 30 | 24 | · | ✓ | · | ✓ | ✓ | Remote MCP server |
| 2 | OpenRouterRe-check live | 80 | 55 | 16 | 33 | · | ✓ | ✓ | · | ✓ | A self-serve sign-up link |
| 3 | Fireworks AIRe-check live | 78 | 54 | 30 | 17 | · | ✓ | · | · | ✓ | Remote MCP server |
| 4 | CohereRe-check live | 76 | 58 | 16 | 20 | · | ✓ | ✓ | · | ✓ | A self-serve sign-up link |
| 5 | Google Gemini APIRe-check live | 70 | 58 | 10 | 14 | · | ✓ | · | · | ✓ | A self-serve sign-up link |
| 6 | MistralRe-check live | 68 | 50 | 16 | 19 | · | ✓ | · | ✓ | ✓ | A self-serve sign-up link |
| 7 | ReplicateRe-check live | 64 | 40 | 30 | 17 | · | ✓ | · | · | ✓ | Remote MCP server |
| 8 | AnthropicRe-check live | 57 | 50 | 0 | 14 | · | ✓ | · | · | · | Public pricing page |
| 9 | GroqRe-check live | 50 | 45 | 0 | 9 | · | ✓ | · | · | · | Public pricing page |
| 10 | OpenAIRe-check live | 48 | 41 | 0 | 14 | blocks agents | ✓ | · | · | · | Agents get the real page, not a bot wall |
| 11 | DeepSeekRe-check live | 47 | 37 | 10 | 9 | · | · | · | · | ✓ | A self-serve sign-up link |
| 12 | xAIRe-check live | 43 | 28 | 6 | 24 | blocks agents | ✓ | · | ✓ | · | Agents get the real page, not a bot wall |
Automated, read-only scan of each homepage, robots.txt, llms.txt, docs, OpenAPI paths and MCP endpoints on 3 Nov 2026. Score = core + the average of Sign up and API, so the two job columns share 40 points. Scores can change; use "Re-check live" for today's result. How scoring works.
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Questions
Which AI model API is the most agent-ready?
Together AI, with 82/100 in our scan on 3 Nov 2026.
Which AI model APIs block AI agents?
OpenAI and xAI returned a bot challenge or a 403 to an AI user-agent.
How is the score calculated?
Out of 100: up to 60 core points for what every site needs (agents can reach and read it, structured data, llms.txt), plus the average of two job scores, each out of 40: letting an agent sign a team up (public pricing, an open sign-up page, a free plan) and letting it connect through the API (OpenAPI, MCP, self-serve keys, OAuth self-registration). For Together AI: 55 + (30 + 24) ÷ 2, rounded, = 82.