{"tool":"cnpj-check","title":"CNPJ check (Brazil)","description":"Validate Brazilian CNPJ (14 digits) with dual Mod-11 check digits.","method":"POST","call":"/v1/tools/cnpj-check/call","input_schema":{"type":"object","required":["cnpj"],"properties":{"cnpj":{"type":"string","description":"14-digit Brazilian CNPJ (punctuation optional)."}}},"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":{"cnpj":"00.000.000/0001-91"}},"docs":"https://rail.akrivis.in/openapi.json","mcp":"https://rail.akrivis.in/mcp"}