{"tool":"ein-format-check","title":"EIN format check (US)","description":"Validate US Employer Identification Number FORMAT (NN-NNNNNNN). No public EIN checksum exists.","method":"POST","call":"/v1/tools/ein-format-check/call","input_schema":{"type":"object","required":["ein"],"properties":{"ein":{"type":"string","description":"US EIN, 9 digits; dashes/spaces allowed."}}},"output_schema":{"type":"object","properties":{"tool":{"type":"string"},"valid":{"type":"boolean"},"normalized":{"type":"string"},"country":{"type":"string"},"reason":{"type":"string"},"scope":{"type":"string"}},"required":["valid","reason"]},"price_usdc_floor":0.000999,"price_note":"dynamic-dutch: live quote via GET /health or the 402 challenge on POST without payment","example_request":{"input":{"ein":"12-3456789"}},"docs":"https://rail.akrivis.in/openapi.json","mcp":"https://rail.akrivis.in/mcp"}