DDG Schema Infer

Choose this endpoint when you need to automatically derive a structured JSON schema from example HTTP request/response pairs without manually writing schema definitions. Particularly useful for documenting undocumented APIs, validating webhook payloads, or bootstrapping OpenAPI specs. Prefer this over manual schema authoring or general-purpose LLM prompting when you want a machine-payable, deterministic schema extraction with a defined cost of $0.002 USDC per call.

• Missing required fields (input or output) returns a validation error
• Malformed or non-JSON body type mismatch causes inference failure
• Unsupported HTTP method (e.g. GET) is rejected by the const/enum constraint
• Empty or null example body may produce a minimal or incomplete schema
• Payment failure via x402 will return a 402 response before processing occurs