API guides
Start with one useful task, then understand access, sources and failures.
Make your first API request
Retrieve a small set of earthquake records and understand the response.
Filter by time and page through results
Bound a request and read multiple pages without confusing page size with coverage.
Understand sources, times and units
Understand what a record establishes before it becomes a table, chart or decision.
Access and common errors
Choose the right next step when a request is denied, invalid or unavailable.