API Test Case Builder
Create QA-ready API test checklists and Gherkin drafts from endpoint details, sample responses, or error bodies.
What is API Test Case Builder?
Create a starting checklist from an API request and response sample. A sample is evidence of one outcome; it does not define all valid states, permissions or error contracts.
How to use API Test Case Builder?
Step 1
Enter the HTTP method, endpoint, and business scenario.
Step 2
Paste a sample response, error body, or implementation note.
Step 3
Copy the generated checklist and review business-specific rules with the team.
Example input / output
For POST /orders, separate missing required fields, malformed JSON, unauthenticated calls, duplicate submissions and a valid order. Define the expected status and persisted side effects for each case.
Example input
{"statusCode":409,"code":"ORDER_ALREADY_PAID","message":"Order is already paid","requestId":"req_abc123","path":"/api/orders/42/pay"}Check the result
- Generated cases are a starting point and still need project-specific business rules.
- A single response sample cannot prove every required field, permission rule, or boundary value.
Practical developer examples
Specify assertions
A test named invalid order is incomplete. Record the changed field, expected error code, response structure and whether a record must remain absent.
Exercise boundaries
Include empty arrays, null versus absent fields, numeric limits, retry behavior and the user's authorization role, using your real API specification.
Common developer use cases
Generated suggestions are not executed tests or coverage proof. Review them against the server's contract and fixture setup before implementing.
Common issues
FAQ
Will this run requests against my API?
No. It generates test planning output locally.
Can it know which fields are required?
Only the provided sample and selected context are available. Confirm required fields against the actual API contract.