Testing Streams Just Got Easier
Testing for streaming APIs, right at your desktop.
Your one-stop shop for sending, monitoring, and testing RESTful, gRPC, GraphQL, Websocket, and streaming API requests
All the protocols you'll ever need.
Multiple streams. A single connection.
Swell supports full HTTP2 multiplexing of requests and responses. HTTP requests to the same host will be sent over the same connection. Swell will attempt to initiate an HTTP2 connection for all HTTPS requests by default, but will revert to HTTP1.1 for legacy servers. Multiple concurrent streams are allowed for each connection.
Server-sent Events (SSEs)
Initiated by a simple toggle box, Swell displays SSE events one by one as they come in. Similar to HTTP/2 streams, multiple open connection streams are allowed for SSE.
Keeping in touch
Swell enables connecting directly to WebSocket servers with an HTTP handshake. Developers can directly send data to the connected WS server in the form of simple strings or binary data. Messages and images are displayed in chatbox format, clearly indicating outgoing and incoming messages.
Queries, Mutations, Subscriptions
Swell includes full support for all three root types of GraphQL — queries, mutations, and subscriptions as well as Introspection - with and without variables. Smart code editor allows for easy query creation.
Bring Your Own Proto (BYOP)
Swell includes full support for all four streaming types of gRPC - unary, client stream, server stream, bidirectional stream.
Built In Test Suite Editor
Advanced WebSocket Testing
New Features in Swell 0.9
In the latest update to Swell, connect to a Websocket server and test with a variety of data types: binary data (i.e. Binary Large oBjects or array buffers) and strings. Conveniently write mocha/chai assertion tests on data transfers. Further, export data logs as well as measure client/server latency.
Get Swell desktop app
The desktop distribution is suggested for Linux, Mac, and Windows users.