# GST Cranes read-only sandbox

GST Cranes provides a zero-auth sandbox surface for the first public API call an agent should make.

## First API call

```bash
curl https://gstcranes.com/api/sandbox/first-call
```

The sandbox first-call endpoint returns static public onboarding links. It does not read private account data, spend credits, initiate payment, publish content, enqueue notifications, or mutate D1/R2/KV/listing state.

## Guarantees

- No API key or OAuth token required.
- No private account state is read.
- No credits are spent and no payment is initiated.
- No records, listings, files, queues, or notifications are created.

## Next public resources

- GST Cranes developer resources: https://gstcranes.com/developer-resources
- GST Cranes API documentation: https://gstcranes.com/developers
- Sandbox HTML surface: https://gstcranes.com/sandbox
- Sandbox markdown surface: https://gstcranes.com/sandbox.md
- Sandbox first API call: https://gstcranes.com/api/sandbox/first-call
- OpenAPI: https://gstcranes.com/.well-known/openapi.json
- API catalog: https://gstcranes.com/.well-known/api-catalog
- Auth notes: https://gstcranes.com/auth.md