Validation

US EIN Validator

Validate United States Employer Identification Number (EIN) format used for business tax identification

text· Text resultOpen tool

Quick start

Call this tool from your code in three languages.

cURL

curl -X POST 'https://api.elysiatools.com/en/api/tools/us-ein-validator' \
  -H 'Content-Type: application/json' \
  -d '{"ein":"Enter Employer Identification Number (e.g., 12-3456789)..."}'

API reference

Send a POST request with your inputs as JSON. File parameters require a separate upload first.

Endpoint

HTTP

POST https://api.elysiatools.com/en/api/tools/us-ein-validator

Parameters

Name	Type	Required	Description
ein	text	Yes	—

Response format

Text result

JSON

{
  "result": "Processed text content",
  "error": "Error message (optional)",
  "message": "Notification message (optional)",
  "metadata": {
    "key": "value"
  }
}

MCP integration

Add this tool to your Model Context Protocol server so AI agents can list and call it.

Server configuration

Add this block to your MCP client configuration:

mcp.json

{
  "mcpServers": {
    "elysiatools-us-ein-validator": {
      "name": "us-ein-validator",
      "description": "Validate United States Employer Identification Number (EIN) format used for business tax identification",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=us-ein-validator",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

List available tools

After connecting to the SSE endpoint, list the exposed tools:

tools/list

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/list"
}

Call this tool

Invoke the tool by its id, passing arguments built from its parameters:

tools/call

{
  "jsonrpc": "2.0",
  "id": 2,
  "method": "tools/call",
  "params": {
    "name": "us-ein-validator",
    "arguments": {
  "ein": "Enter Employer Identification Number (e.g., 12-3456789)..."
}
  }
}

Chain multiple tools in one session with a comma-separated toolId list, e.g. /mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp (max 20).

Questions or issues? Contact [email protected]

Browse tools Open tool

Name

Type

Required

Description

ein

text

Yes

—

{ "mcpServers": { "elysiatools-us-ein-validator": { "name": "us-ein-validator", "description": "Validate United States Employer Identification Number (EIN) format used for business tax identification", "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=us-ein-validator", "command": "", "args": [], "env": {}, "isActive": true, "type": "sse" } } }

{ "jsonrpc": "2.0", "id": 2, "method": "tools/call", "params": { "name": "us-ein-validator", "arguments": { "ein": "Enter Employer Identification Number (e.g., 12-3456789)..." } } }