Lucid
Officialby Lucid
Lucid is an MCP server that solves one of the most frustrating problems with AI coding assistants: stale training data. Instead of letting your AI hallucinate deprecated APIs or recommend package versions from 18 months ago, Lucid plugs into live sources in real time. It searches official documentation, checks the latest package versions on npm and PyPI, verifies facts against current web data, and fetches up-to-date API references on demand. The result is an AI that answers with information from today, not from whenever its training cutoff was. Released in March 2026 and already ranking #34 globally on PulseMCP with 46,000+ weekly visitors, Lucid has quickly become a go-to upgrade for developers who need their AI tools to be accurate, not just confident. It works with any MCP-compatible client — Claude, Cursor, Windsurf — and requires no configuration beyond installation. If you've ever caught your AI recommending a function that was deprecated two major versions ago, Lucid is the fix.
Installation
Key Features
- ✓Live documentation search across official sources — no cached or outdated results
- ✓Package version checking for npm, PyPI, and other registries in real time
- ✓Fact verification against current web data to catch AI hallucinations
- ✓API reference fetching that always reflects the latest spec, not training data
- ✓Works with any MCP-compatible client: Claude, Cursor, Windsurf, and more
- ✓Zero configuration required — install and connect immediately
Use Cases
- →Verify the correct package version before adding a dependency to your project
- →Look up current API endpoints and method signatures while coding
- →Check whether a library function still exists before your AI recommends it
- →Fetch the latest documentation for a framework mid-conversation
- →Cross-reference AI-generated code against live official references