CLIRank

CLIRank is a free, open directory that scores and ranks APIs for compatibility with AI agents, helping coding agents select appropriate APIs at runtime using transparent evaluation criteria. It scores more than 420 APIs using an eight-signal rubric for agent-friendliness, and works with MCP-compatible agents including Claude Code, Cursor, Copilot, and Cline. CLIRank offers programmatic API discovery via REST endpoints, task-based guides for use cases like transactional email, payments, and deployment, and an agent-native CLI library with 16 installable tools. It also generates free 'Agent Readiness Reports' assessing documentation and auth quality. The entire service is free, open, and requires no authentication.