Top 12 Open-Source Alternatives to HttpMaster

HttpMaster

HttpMaster is a professional software tool for testing and debugging HTTP applications, primarily aimed at REST API applications and web services.

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APIs API Tools Developer Tools API Testing API Clients Developer APIs API Design API Management API Testing Automated Testing Business Workflows

Summary

The top open-source alternatives to HttpMaster are Hoppscotch, Postman, and MockServer. One of the criteria for ordering this list is the number of mentions that products have on reliable external sources. You can suggest additional sources through the form here.

Hoppscotch Landing Page
1

Hoppscotch

Open source API development ecosystem
Pricing:
- Open Source
- Freemium
- Free Trial
#Productivity #API Tools #Developer Tools 102 social mentions
Postman Landing Page
2

Postman

The Collaboration Platform for API Development
Pricing:
- Open Source
#API Tools #Developer Tools #APIs 30 social mentions
MockServer Landing Page
3

MockServer

Easy mocking of any system you integrate with via HTTP or HTTPS.
Pricing:
- Open Source
#API #API Tools #Developer Tools 4 social mentions
Checkly Landing Page
4

Checkly

Fresh API monitoring and Site Transaction Monitoring. From one great dashboard.
Pricing:
- Open Source
#Log Management #Monitoring Tools #Uptime Monitoring 11 social mentions
StopLight Landing Page
5

StopLight

Stoplight is an API Design, Development, and Documentation platform that enables consistency, reusability, and quality in your API lifecycle, all with an easy, enjoyable developer experience.
Pricing:
- Open Source
- Freemium
- Free Trial
#API #API Tools #API Management 33 social mentions
Webhook.site Landing Page
6

Webhook.site

Instantly generate a free, unique URL and email address to test, inspect, and automate (with a visual workflow editor and scripts) incoming HTTP requests and emails.
Pricing:
- Open Source
- Freemium
- $14 / Monthly
#API #Sales Workflow #Data Integration 87 social mentions
Insomnia REST Landing Page
7

Insomnia REST

Design, debug, test, and mock APIs locally, on Git, or cloud. Build better APIs collaboratively for the most popular protocols with a dev‑friendly UI, built-in automation, and an extensible plugin ecosystem.
Pricing:
- Open Source
#API #API Tools #Developer Tools 134 social mentions
cURL Landing Page
8

cURL

cURL is a computer software project providing a library and command-line tool for transferring data...
Pricing:
- Open Source
#API Tools #Developer Tools #APIs 129 social mentions
HTTP Toolkit Landing Page
9

HTTP Toolkit

Beautiful, cross-platform & open-source tools to debug, test & build with HTTP(S). One-click setup for browsers, servers, Android, CLI tools, scripts and more.
Pricing:
- Open Source
- Freemium
- €7 / Monthly (for a Pro subscription)
#Software Development #Development Tools #Security 30 social mentions
FitNesse Landing Page
10

FitNesse

FitNesse is a fully integrated standalone wiki and acceptance testing framework.
Pricing:
- Open Source
#Software Testing #Testing #QA 3 social mentions
GoReplay Landing Page
11

GoReplay

GoReplay is an open-source tool for capturing and replaying live HTTP traffic into a test environment.
Pricing:
- Open Source
#Automated Testing #Testing #Developer Tools 1 social mentions
usebruno.com
12

Bruno

Bruno is a Git-integrated, fully offline, and open-source API client
Pricing:
- Open Source
#API Tools #APIs #Developer APIs 1 social mentions