{"slug":"api-zfinia-com-x402-v1-protobuf-schema-audit-1bf25f","title":"Audit one .proto source for what protobuf rejects and what it will cost later","host":"api.zfinia.com","method":"POST","resource":"https://api.zfinia.com/x402/v1/protobuf-schema-audit","category":"code","description":"Audit one .proto source for what protobuf rejects and what it will cost later. Reports an absent syntax line, which silently means proto2; a required field, which can never be removed; an enum with no zero value, so an unset field has nothing to read as; a zero value named after a real state; a dupl","price_listed":0.12,"price_asked":0.12,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":3096,"reported_calls_30d":1,"reported_payers_30d":1,"networks":["eip155:8453"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"body":{"proto":"package shop;\n\nenum Channel {\n  WEB = 1;\n  APP = 2;\n}\n\nmessage Cart {\n  required string cart_id = 1;\n  repeated string skus = 16;\n  map<float, int32> weights = 3;\n  int32 legacy = 19000;\n}\n"},"bodyType":"json","method":"POST","type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"body":{"additionalProperties":false,"properties":{"proto":{"maxLength":262144,"type":"string"},"require_unspecified_zero":{"type":"boolean"}},"required":["proto"],"type":"object"},"bodyType":{"enum":["json","form-data","text"],"type":"string"},"method":{"enum":["POST"],"type":"string"},"type":{"const":"http","type":"string"}},"required":["type","method","bodyType","body"],"type":"object"},"output":{"properties":{"example":{"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[{"day":"2026-10-04","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.12,"price_match":true,"latency_ms":3096,"error":null}],"description_full":"Audit one .proto source for what protobuf rejects and what it will cost later. Reports an absent syntax line, which silently means proto2; a required field, which can never be removed; an enum with no zero value, so an unset field has nothing to read as; a zero value named after a real state; a duplicate number; a number inside the implementation-reserved range; a non-permitted map key; and a repeated field above the one-byte tag boundary while low numbers are free.","last_updated":"2026-10-04T08:23:51.576Z","schemes":["exact"]}