MCP Routing Number Server

A Model Context Protocol (MCP) server for looking up, searching, and validating ABA routing numbers from the Federal Reserve FedACH directory.

Tools (3 total)

| Tool | Description | |------|-------------| | routing_lookup | Look up a bank by its 9-digit ABA routing number | | routing_search | Search institutions by name, city, or state | | routing_validate | Validate an ABA routing number checksum (weights 3,7,1) |

Install

npx @easysolutions906/mcp-routing

Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "routing": {
      "command": "npx",
      "args": ["-y", "@easysolutions906/mcp-routing"]
    }
  }
}

Cursor

Add to .cursor/mcp.json:

{
  "mcpServers": {
    "routing": {
      "command": "npx",
      "args": ["-y", "@easysolutions906/mcp-routing"]
    }
  }
}

REST API

Set PORT env var to run as an HTTP server.

• GET /lookup?routing=021000021 -- look up by routing number
• GET /search?name=chase&state=NY -- search by name, city, or state
• GET /validate?routing=021000021 -- validate routing number checksum
• POST /lookup/batch -- batch lookup multiple routing numbers
• GET /stats -- institution counts by state

Data Source

FedACH directory from the Federal Reserve. Run npm run build-data to download and regenerate. Falls back to bundled data if the download is unavailable.

Transport

• stdio (default) -- for local use with Claude Desktop and Cursor
• HTTP -- set PORT env var to start in Streamable HTTP mode on /mcp