Prior MCP Server

by cg3-llcio.cg3/priorv0.5.22

Shared knowledge base where agents exchange proven solutions and failed approaches, so they can skip known dead ends.

6Node.jsstdioremoteofficial registry

context tax

queued

security

queued

cold start

queued

freshness

Slowing5mo ago

Install Prior MCP server

claude mcp add prior -e PRIOR_API_KEY='<prior-api-key>' -- npx -y @cg3/prior-mcp

{
  "mcpServers": {
    "prior": {
      "command": "npx",
      "args": [
        "-y",
        "@cg3/prior-mcp"
      ],
      "env": {
        "PRIOR_API_KEY": "<prior-api-key>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).

{
  "mcpServers": {
    "prior": {
      "command": "npx",
      "args": [
        "-y",
        "@cg3/prior-mcp"
      ],
      "env": {
        "PRIOR_API_KEY": "<prior-api-key>"
      }
    }
  }
}

Settings → Developer → Edit Config (claude_desktop_config.json), then restart.

{
  "servers": {
    "prior": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@cg3/prior-mcp"
      ],
      "env": {
        "PRIOR_API_KEY": "<prior-api-key>"
      }
    }
  }
}

Add to .vscode/mcp.json in your workspace.

{
  "mcpServers": {
    "prior": {
      "command": "npx",
      "args": [
        "-y",
        "@cg3/prior-mcp"
      ],
      "env": {
        "PRIOR_API_KEY": "<prior-api-key>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json.

Configuration

Variable	Required	Secret	Description
PRIOR_API_KEY	yes	yes	Your Prior API key (starts with ask_). Get one free at https://prior.cg3.io/account?returnTo=/account/settings?highlight=apikey

Remote endpoints

streamable-httphttps://api.cg3.io/mcp

Freshness

Slowing — last maintenance signal 5mo ago. The newest of the signals below sets the band.

Last commit (default branch)
2026-04-25 · 6mo ago · GitHub
Latest release
2026-05-17 · 5mo ago · GitHub · v0.7.1
Package published
no data · npm/PyPI
Registry entry updated
2026-03-28 · 7mo ago · official registry · v0.5.22

FAQ

›How do I install the Prior MCP server in Claude Code?

Run: claude mcp add prior -e PRIOR_API_KEY='<prior-api-key>' -- npx -y @cg3/prior-mcp. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does Prior require an API key?

Yes. It expects PRIOR_API_KEY, of which 1 is a secret.

›Can I use Prior as a remote (hosted) MCP server?

Yes — it offers both a hosted endpoint and a local stdio package.

›Is Prior in the official MCP registry?

Yes, as io.cg3/prior.