Dev tools · alternatives · 2026
24 alternatives to API Interceptor, Mocker and Tester
Intercept, modify, mock and test HTTP requests with ease
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.
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Beautiful, cross-platform & open-source tools for debugging, testing and building with HTTP(S), on Windows, Linux & Mac.
2019 · httptoolkit.tech · its alternatives →
- 2
Introducing Interceptor - A browser extension that mocks backend responses and how to use it.
2018 · crypt.codemancers.com · its alternatives →
- 3IR
Sharing an internal tool that accelerated my development work 10-fold, especially with API debugging. Thought fellow developers here might find it useful. As a developer, I often have trouble reproducing errors at the client end. https://intercept.rest lets me debug and monitor API requests and responses. It is similar to the Network tab in Chrome Developer Tools but works for any API: mobile apps, webhooks, frontend etc. After I shared it with a close circle of friends, they found it incredibly useful and even found new use cases, I never imagined. Been a long time lurker here and…
2018 · its alternatives →
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HTTP Mock▲22Intercept, debug & mock HTTP(S) with zero setup
2019 · httptoolkit.com · its alternatives →
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Intercept, modify, and replay HTTP request son the fly
Feb 2026 · chromewebstore.google.com · its alternatives →
- 8MO
2019 · mockit.netlify.com · its alternatives →
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API_TESTER▲249Test your APIs right from the macOS menu bar
2025 · apps.apple.com · its alternatives →
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Hurl, run and test HTTP requests with plain text and curl. Hurl can run fast automated integration tests.
2021 · hurl.dev · its alternatives →
- 11
Mocklets▲82A HTTP-based API simulator to assist parallel development 🛠️
2018 · mocklets.com · its alternatives →
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Hi HN, I built this after using Requestly, Mokku, Mockiato, Tweak, and Mockoon. Each one either paywalled the features I actually needed, required a separate server running on my machine, or just didn't fit the way I work. The browser is already open. DevTools is already open. I wanted the mocking to live there too, not in a separate app I have to remember to start. So roughly a month ago, I started building my own tools. It intercepts network requests at the browser level and lets you swap the response, status code, headers, body without touching your code or spinning up anything.…
Feb 2026 · mockstudio.app · its alternatives →
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Hey HN, I recently built an open-source HTTP interceptor called Relay, which works as a Chrome extension for capturing, modifying, and replaying HTTP requests directly in your browser — no account needed. How it works: Relay lets you capture requests as they happen, modify parameters, headers, or body content, and replay them on the fly. You can customize or debug network requests quickly without needing an external tool or complex setup. Key features: - Simple setup: Install the extension and start a session to capture requests. You can filter by URLs and methods. -Request modification:…
2024 · chromewebstore.google.com · its alternatives →
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Mockoon is the easiest and quickest way to run mock REST API servers. No remote deployment, no account required, free, open source and cross-platform.
2017 · mockoon.com · its alternatives →
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- 19MS
2018 · mocktastic.com · its alternatives →
- 20TP
2011 · httpposttool.com · its alternatives →
- 21
Test REST APIs quickly, right in your browser
2025 · chromewebstore.google.com · its alternatives →
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Hi HN! I'm Ankit, the founder of Beeceptor, a request mocking and intercepting tool. This time, I built something new to address a pain I’ve personally felt (and heard from dozens of QA, frontend, and platform teams): making OpenAPI specs actually useful during development. API contracts just sit around as docs often. What if you could 'activate' them, instantly have a realistic, hosted mock server-with contract validation, smart test data, and early usage? So I made _Mockaroo for OpenAPI_, but with brains. It spins up a hosted mock server from your spec in one click. It: - Generates…
2025 · beeceptor.com · its alternatives →
- 24
Hey HN! We’ve open-sourced Requestly (https://github.com/requestly/requestly) - A network debugging proxy for web & mobile apps. Requestly intercepts all HTTP(s) requests & responses and provides full control to developers to modify the request/response like rewriting request URL to hit different environment or returning different response for APIs/scripts. In addition to HTTP(s) interception & modification capabilities, Requestly also offers Mock Server [0] & recording the browser sessions [1] with video, console logs, & network logs stitched together. We use…
2023 · github.com · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →