data · 10 lessons
APIs, HTTP & JSON
Construct requests. Inspect authority, errors, retries, and response contracts.
What you are working toward
Reason about exchanges across an unreliable network.
0 learning steps complete · View prerequisites and evidence →
The existing foundation
Start here, or use it to fill a gap.
Original lessons, practice, bosses, and progress are preserved. Completion from this journey is distinct from the new independent evidence model.
- 01Request & responseGuided foundationOpen →
- 02HTTP methodsGuided foundationOpen →
- 03JSON shapesGuided foundationOpen →
- 04Status codesGuided foundationOpen →
- 05Headers & authenticationGuided foundationOpen →
- 06Query parameters & paginationGuided foundationOpen →
- 07Fetch & errorsGuided foundationOpen →
- 08Validate external dataGuided foundationOpen →
- 09Rate limits & retriesGuided foundationOpen →
- 10Design an integrationGuided foundationOpen →