Prior is a Model Context Protocol (MCP) server: Shared knowledge base for AI agents. Search and contribute solutions to technical problems. Because it speaks the Model Context Protocol, AI assistants can use Prior as a set of callable tools instead of you copy-pasting between apps.
You can run Prior two ways: connect to the hosted endpoint at https://api.cg3.io/mcp with no local install, or run it on your own machine via the npm package @cg3/prior-mcp. Configuration happens through environment variables — you'll need PRIOR_API_KEY. The current release is v0.5.22, with source at cg3-llc/prior_mcp on GitHub.
On mcp.site, Prior sits in the AI & Agents category. Any MCP client can use it — Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, Zed among them — via the install snippets below. If you maintain Prior for cg3.io, claim this listing to verify ownership, earn the Verified badge, and keep the details current.