intermediate · self-paced · 5 weeks · 7–9 hrs/week
API Contract Testing Sprint
Shape consumer-driven contracts, publish schemas, and catch breaking changes before they hit staging.
¥54,000 JPY — informational list price
Overview
You pair Postman collections with contract tests using lightweight tooling, focusing on readable failures when payloads drift. Workshops cover versioning etiquette and when not to block a release.
What is included
- Schema diff strategies for JSON and OpenAPI
- Provider vs consumer responsibilities spelled out
- Synthetic data factories with realistic edge cases
- Contract test placement inside CI stages
- Error payload assertions that survive refactors
- Deprecation notices your partners actually read
- Observability hooks for flaky partner sandboxes
Outcomes you can evidence
- Negotiate contract changes without hallway debates
- Automate schema checks that fail with actionable diffs
- Document ownership for each published contract
Lead mentor
Yui Fujita
Backend mentor specializing in testable service boundaries.
Avatars load from ui-avatars.com with a styled fallback if blocked.
FAQ
Exercises work with the free tier; alternatives noted where teams standardize on other clients.
Experience notes
“The API Contract Testing Sprint forced our partner team to pin schemas; onboarding new vendors stopped being a guessing game.”