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Alternatives

Products that do what API Interceptor, Mocker and Tester does

Intercept, modify, mock and test HTTP requests with ease

  1. 1IR

    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

  2. 2

    Intercept & modify HTTP requests

    2021

  3. 3
    Middleman136

    Intercept and modify and HTTP(S) request and response easily

    2024

  4. 4HM
  5. 5

    Intercept, modify, and replay HTTP request son the fly

    Feb 2026

  6. 6IM
  7. 7OD

    Effortlessly discover API behaviour with a Chrome extension that automatically generates OpenAPI specifications in real time for any app or website.

    2023 · github.com

  8. 8

    Test your APIs right from the macOS menu bar

    2025

  9. 9

    A HTTP-based API simulator to assist parallel development 🛠️

    2018

  10. 10

    Generate custom data & API to build apps in less than 30s

    2021

  11. 11HR
  12. 12

    The easiest way to test APIs

    2017

  13. 13OS

    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

  14. 14MO
  15. 15

    A simple yet powerful AI Powered HTTP API mocking tool

    Feb 2026

  16. 16

    Your playground for writing custom API security tests

    2023

  17. 17
    Probely87

    Intuitive and easy-to-use webapp vulnerability scanner

    2018

  18. 18
    Requestly148

    Debug & Modify HTTP(s) Requests - loved by 125K+ web devs

    2019

  19. 19

    Effortless mock APIs for seamless testing & prototyping

    2024

  20. 20

    Benchmark proxies for reliable, target-specific scraping

    29d ago · scrapeops.io

  21. 21

    Cross browser testing by taking full-page screenshots

    2018

  22. 22

    Mock blocked APIs, passthrough ready routes, see live source

    Mar 2026 · mockphine.com

  23. 23OM

    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

  24. 24AS

    Hiya HN! Just released Artillery Probe - a Swiss army knife for testing HTTP from the CLI. Think mini-curl with better UX for common use-cases, plus a couple of extra features. Would love for you to try it and give some feedback! https://www.artillery.io/blog/swiss-army-knife-for-http-testing and: npm install artillery@latest What does it do? - First of all, it's a HTTP client! It does all the usual stuff you'd expect from a HTTP client... HTTP methods, request bodies, custom headers, forms, Basic Auth etc. - Got some JSON or XML back? It'll pretty-print it, and syntax…

    2022

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