The API Client that simply works
A fast, private and offline API client for your REST, gRPC, GraphQL and WebSocket services
Free and open source · macOS, Windows and Linux
REST, gRPC, GraphQL and WebSocket
Every HTTP method and body type, gRPC with reflection or proto files, GraphQL queries, and live WebSocket connections.
Fast and Private
A native app drawn on the GPU. Local-only data, secrets encrypted with your OS keychain, and zero telemetry.
Python Scripting
Pre and post-request scripts with tests, for HTTP, gRPC and GraphQL, in a sandboxed executor.
Test Cases and CI
Chain requests into test cases with assertions and captures, then run them in CI with chapar-cli.
Traffic Proxy
See the HTTPS traffic of any app or phone, then open a request in Chapar, copy it as cURL or export HAR.
Files and Imports
Requests and environments are YAML files you can keep in git. Import Postman, OpenAPI, proto files and curl.