Context7
kills hallucinated apis by injecting real, version-specific docs
solves the single most common failure in agentic coding — code written against a two-year-old api — and it's free to start.
context7 pulls up-to-date, version-specific library documentation and code examples into the prompt on demand. you can name a library as `/org/project` and pin a version in plain language. it is the rare mcp server whose value is obvious within one session.
setup is `npx ctx7 setup`, which handles oauth, generates a key and installs a skill, with `--claude`, `--cursor` and `--opencode` targeting. the manual path points at `https://mcp.context7.com/mcp` with the key in a `CONTEXT7_API_KEY` header — which is the right pattern, and notably better than the competitors that document putting secrets in url query strings.
the description above is ours, condensed from the ranking. pricing moves — check it on the vendor's own page before you rely on it.
- category
- mcp servers
- pricing
- free tier; api key for higher limits
- website
- github.com
solves the single most common failure in agentic coding — code written against a two-year-old api — and it's free to start.
we researched this category against vendors' own pricing pages and licence files. that is where this line comes from — not from the vendor, and not from anything they paid for.
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