Your one-stop shop for sending and monitoring
RESTful, Streaming, GraphQL, and gRPC API requests

Swell is a API development tool that enables developers to test endpoints served over streaming technologies including Server-Sent Events (SSE), WebSockets, HTTP2, gRPC, and GraphQL.


New to Swell 0.6.0


Brand New UI


Swell comes with a brand new look! Featured with improved navigation and faster rendering processes, testing endpoints never felt so smooth!

GraphQL Schema Introspection & Smart Code Editor


Never make a GraphQL mistake again thanks to our new Schema Introspection and Smart Code Editor. Make queries, mutations, and subscriptions without any of the guesswork!

HTTP/2


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 HTTP2 for all HTTPS requests by default, but will revert to HTTP1.1 for legacy servers

RESTful APIs


Just as Swell can test streaming and non-RESTful APIs, Swell can also test your RESTful APIs

Server-Sent Events (SSE)


Connect to SSEs and watch streaming events come in one by one

WebSockets (WS)


Connect directly to WebSocket servers with upgraded HTTP/HTTPS protocols and send messages to test real-time responsiveness

GraphQL


Test all three GraphQL root types (query, mutation, subscription) with and without variables

gRPC


Swell includes full support for all four streaming types of gRPC - unary, client stream, server stream, and bidirectional stream

Collections


Keep track of your endpoints with collections, and easily import/export groups of requests


Contributors


Grace Kim

@gracekiim

Alex Sanhueza

@alexsanhueza

Wyatt Bell

@wcbell51

John Madrigal

@johnmadrigal

Michael Miller

@mjmiguel

Grace Spletzer

@gspletzer

Hideaki Aomori

@h15200

Nick Healy

@nickhealy

Matt Gin

@chunsonhoag

Stephanie Wood

@stephwood

Kyle Combs

@texpatnyc

Jason Ou

@jasonou1994

Anthony Terruso

@discrete-projects

Brandon Marrero

@barndon6190

Kwadwo Asamoah

@addoasa

Abby Chao

@abbychao

Amanda Flink

@aflinky

Kajol Thapa

@kajolthapa

Billy Tran

@btctrl

Paul Rhee

@prheee

Sam Parsons

@sam-parsons

Yoon Choi

@cyoonique

Nancy Dao

@nancyddao

Evan Grobar

@egrobar

Dan Stein

@danst3in

Amruth Uppaluri

@amuuth