API Tester is the first mobile app to test any type of API on the go. Including REST GraphQL WebSocket SOAP JSON RPC XML HTTP HTTPS.

Main features:
- All types of HTTP requests: GET POST PUT PATCH DELETE HEAD OPTIONS COPY LINK UNLINK PURGE LOCK UNLOCK PROPFIND VIEW.
- Powerful GraphQL editor with full-scale experience: body editor with Queries Mutations Subscriptions and syntax support; variables editor; documentation explorer; request settings and metadata.
- WebSocket testing tool. Handles connection and message exchange via WS or WSS.
- API calls with any kind of request data encoding and transfer type (query params URLEncoded params FormData raw data send files from device storage cloud remote server).
- Settings. TLS can be skipped redirects can be disabled timeouts are adjustable. Weak SSL verification can be enabled and replaced with self-signed certificate.
- Import request or collection by curl link or file from your device. And naturally there is any type of collection for you: Swagger OpenAPI Postman YAML.
- Need to share request in seconds? One tap and done. Deep link and cURL command supported.
- Integrations: Shortcuts Widgets Apple Watch app.

Additional little things:
- Autocomplete for most common headers keys.
- Syntax highlighting; Auto formatting.
- Optimized for viewing on any device screen.
- Cookies. Collect edit create.
- Request metrics. Measure request duration response size status code changing.
- History of all request calls.
- Request authorisation. Basic Auth with password and username. OAuth with header or query access token.