Model Context Protocol

Deterministic data tools for agents.

Agents are good at reasoning and bad at reliably normalizing a phone number. Connect any MCP client to MessyAPI and every capability becomes a tool — same engines, same key, same metering as the REST API.

• Remote endpoint: https://messyapi.com/mcp (streamable HTTP, JSON-RPC 2.0, protocol 2025-06-18)
• Local stdio bridge: npm install -g https://messyapi.com/pkg/messyapi-mcp-1.0.0.tgz
• Authenticate with your existing API key as a Bearer header

Connect in dashboard MCP docs

One-click setup

Add to Cursor

Then replace messy_live_... with your key in Cursor's MCP settings. Use a test key while experimenting.

Claude Code (terminal)

claude mcp add --transport http messyapi https://messyapi.com/mcp \
  --header "Authorization: Bearer $MESSYAPI_KEY"

Claude Desktop / Cursor / any MCP client — remote (recommended)

{
  "mcpServers": {
    "messyapi": {
      "url": "https://messyapi.com/mcp",
      "headers": { "Authorization": "Bearer messy_live_..." }
    }
  }
}

Local stdio bridge

{
  "mcpServers": {
    "messyapi": {
      "command": "npx",
      "args": ["-y", "https://messyapi.com/pkg/messyapi-mcp-1.0.0.tgz"],
      "env": { "MESSYAPI_API_KEY": "messy_live_..." }
    }
  }
}