API Specification Template

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An API Specification documents endpoints, methods, auth, request/response formats, and expected outcomes so integrations are consistent and testable.

Purpose and Benefits

  • Developer productivity: Clear contracts speed implementation.
  • Fewer integration errors: Defined payloads reduce ambiguity.
  • Interoperability: Systems communicate reliably.
  • Testing: QA can validate expected responses.
  • Onboarding: New devs and partners integrate faster.

Recommended API Specification Template

API NameCreate Wallet Account
Endpoint/api/v1/wallet/create
MethodPOST
Request{ "name": "John Doe", "email": "john@example.com", "phone": "+1234567890" }
Response{ "wallet_id": "WLT1001", "status": "created" }
API NameGet Wallet Balance
Endpoint/api/v1/wallet/balance
MethodGET
Requestwallet_id=WLT1001
Response{ "wallet_id": "WLT1001", "balance": 120.50, "currency": "USD" }

Field Explanation

  • API Name: Descriptive purpose of the endpoint.
  • Endpoint: URL path to call.
  • Method: HTTP verb (GET, POST, PUT, PATCH, DELETE).
  • Request: Required params/body/headers.
  • Response: Expected output and shape.