Context7

Context7, an Upstash project, provides up-to-date, version-specific documentation for LLMs and AI code editors — solving the real problem of AI assistants generating code against outdated or hallucinated API references. It offers a documentation library developers can query directly (with a community "Add Docs" contribution path), AI code editor rankings, live chat for testing, and integration into coding-agent workflows so an assistant pulls current docs rather than relying on stale training data. A "/plans" pricing page exists but specific tiers aren't detailed on the main site; the core documentation lookup is accessible directly via chat with no signup required to try. Good fit for a developer using AI coding assistants who's been burned by an agent citing outdated library APIs, and wants current, version-specific documentation fed into the agent's context automatically.