Shaper — sexualrhinoceros

Passively captures API traffic as you browse and builds structured documentation from what it observes. Shaper groups requests into endpoints, infers JSON schemas from response bodies, decodes protobuf without a schema, tracks query parameters, and exports OpenAPI 3.x specs — all without touching the page.

Supports HTTP, GraphQL, gRPC-Web/Protobuf, and Server-Sent Events.



How it works: Start capture on a tab, browse normally, then open the dashboard to see every API endpoint the site uses — grouped by domain, with inferred request/response schemas, observed parameter values, copyable curl commands, and one-click export.

Features:
- Automatic endpoint grouping from raw traffic
- JSON schema inference that refines with every new sample
- Schema-less protobuf wire format decoding
- OpenAPI 3.x, HAR, .proto, and JSON export
- Per-tab or all-tabs capture with domain filtering
- Full dashboard with endpoint tree, header inspector, and sample viewer
- Alt+Shift+C keyboard shortcut

Privacy: All data stays in your browser. No telemetry, no external requests. See the privacy policy for details.