Routing Number Lookup — ABA/ACH Bank Routing Validation

@easysolutions906

Visit Server

a month ago

Look up and validate US bank routing numbers. ABA checksum validation, search by bank name or state. Used by payroll, ACH, and payment platforms.

Overview Tools Comments

Overview

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

Try in Playground

Server Config

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

Build with ShipAny.