Websocket connections with Postman

Question

I'm using Postman to test an existing REST API. This API calls async functions on the server which return a response over a websocket using StompJS.

Is it possible to connect to the websocket using Postman?

Anemoscope

@NishchitDhanani Heads up, your site is down – Tollman

Thanks, @TheEnvironmentalist, Domain changed to firecamp.io – Chirrup

This is now possible in Postman - blog.postman.com/postman-supports-websocket-apis – Regime

Answer 1

Update: May 20, 2021, As of version 8.5.0 - Postman supported WebSocket APIs

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Obsolete (original) answer:

This is not possible as of May 2017. There is a request for this if you want to upvote: github.com/postmanlabs/postman-app-support/issues/4009

Mol

As of version 8.5.0 - Postman supports WebSocket APIs. The linked Github issue has now been closed. 🎉 – Regime

@DannyDainton Thank you for your information. I will update my answer. – Mol

@DannyDainton how do you can see on postman about send api call that reply not with a res.send but with a socket.emit? – Pavement

Answer 2

As the previous comment mentioned you can't do this in Postman. however, I found this Chrome app in the web store. It is very simple, but it's working really well with my local web socket connections.

Smart Websocket Client

Memorialist

thanks for the quick solution almost 3 years later why no postman do this? – Dispensary

Thank you @JoshSommer. Easy simple and tool, what I need. – Bergamot

Answer 3

As of version 8.5.0 - Postman now supports WebSocket requests.

More information can be found here:

https://blog.postman.com/postman-supports-websocket-apis/

Short Level Up video tutorial of the current functionality:

https://youtu.be/H-7EZVj9D-k

Regime

Answer 4

It's not possible in Postman yet; But there is a new alternative for Postman, named Postwoman. it's open source and supports realtime Websocket and SSE requests.

Update

It seems they have rebranded Postwoman to Hoppscotch and have improved the Websocket support.

Lenticularis

Not usable for requests to localhost yet – Letendre

127.0.0.1 works for now but local network calls like 192.168.x.x doesn't work. – Lenticularis

unfortunately it doesn't allow you to save requests/messages like Postman does – Pisano

Thanks! It is useful. – Nordin

Answer 5

Postman doesn't support it, but WebSocket King does.

Quietly

There is also a Chrome extension if you fancy that. – Pompei

Answer 6

I've run into this issue often enough that I finally created my own barebones GUI for testing websockets. It's called Socket Wrench, it supports

• multiple concurrent connections to servers (with all responses and connections displayed in the same view),
• comprehensive message history to enable easy re-use of messages, and
• custom headers for the initial connection request.

It's available for Mac OS X, Windows and Linux and you can get it from here.

Kirghiz

Looks like an interesting project. I'm hitting some errors; I'll follow up with a GitHub issue. – Losing

@EmmanuelMahuni Could you please open a Github issue with steps to reproduce? – Kirghiz

not bad... i like it. wish there was a way to save the output and the json preview is worse than the text preview. the json should be pretty and the rest should be.. well text – Dispensary

very good project. nice work... needs just a couple improvements – Dispensary

@ChristianMatthew Please open a Github issue on the project, I'll look into implementing it soon :) – Kirghiz

Answer 7

You can use the tool APIC available here https://chrome.google.com/webstore/detail/apic-complete-api-solutio/ggnhohnkfcpcanfekomdkjffnfcjnjam. This tool allows you to test websocket which use either StompJS or native Websocket. More info here at www.apic.app

Willams

Great! but It is beta yet. I an waiting for release. – Abstriction

That myapic.com url appears to have expired and been taken over by an ad squatter. Looks like they currently use apic.app instead – Willtrude

@Abstriction It seems that it is not beta anymore – Bubalo

Yes, It is great – Abstriction

Answer 8

I ran into the exact same problem. Had to make a Web Socket call. I was able to accomplish this using Advanced Rest Client. I'm using ARC version : 12.1.3

Panslavism

No way to customize anything on the WS request though, just an address field! – Pallette

I'm stuck with same problem. I need to set custom headers on connect request, but looks like it's impossible for now – Lindgren

@DubNazar If you're still interested, you could use Socket Wrench – Kirghiz

Answer 9

Postman currently does not support that.

You can use the online tool at: https://www.piesocket.com/websocket-tester

Montoya

Answer 10

Postman doesn't support websocket. Most of the extension and app I had ever seen were not working properly.

Solution which I found

Just login/ open your application in your browser, and open browser console. Then enter your socket event, and press enter.

socket.emit("event_name", {"id":"123"}, (res)=>{console.log(res); });

France

Answer 11

You can use Socket.io tester, this app lets you connect to a socket.io server and subscribe to a certain topic and/or lets you send socket messages to the server

Vann

this is not what the op is looking for at all – Dispensary

This does not connect on localhost – Pipit

Answer 12

Use Firecamp , support websocket(Socketio & Ws ) ,Rest, Graphql , You can install in your système or use plugin https://firecamp.io/

Langobard

Answer 13

Have not discovered that postman released web sockets function, but in any case i recently wrote my own simple very simple utility with pure js & html (no bootstrap, no npm, no heavy libs), maybe it would be useful for someone: https://github.com/Wissance/wstester

Overcast