Dev tools · alternatives · 2026
24 alternatives to Middleman
Intercept and modify and HTTP(S) request and response easily
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Middleman launched in 2024; newer entries below may have overtaken it.
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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 →
- 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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Postman companion to sync cookies & capture network requests
2020 · chromewebstore.google.com · its alternatives →
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I spent a few hours last weekend testing whether AI can replace code by executing directly. Built a contact manager where every HTTP request goes to an LLM with three tools: database (SQLite), webResponse (HTML/JSON/JS), and updateMemory (feedback). No routes, no controllers, no business logic. The AI designs schemas on first request, generates UIs from paths alone, and evolves based on natural language feedback. It works—forms submit, data persists, APIs return JSON—but it's catastrophically slow (30-60s per request), absurdly expensive ($0.05/request), and has zero UI…
Nov 2025 · github.com · its alternatives →
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Introducing Interceptor - A browser extension that mocks backend responses and how to use it.
2018 · crypt.codemancers.com · its alternatives →
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Intercept, modify, and replay HTTP request son the fly
Feb 2026 · chromewebstore.google.com · its alternatives →
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Intercept, modify, mock and test HTTP requests with ease
May 2026 · chromewebstore.google.com · 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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I built this out of curiosity about what Claude Code was actually sending to the API. Turns out, watching your tokens tick up in real-time is oddly satisfying. Sherlock sits between your LLM tools and the API, showing you every request with a live dashboard, and auto-saved copies of every prompt as markdown and json.
Jan 2026 · github.com · its alternatives →
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Requestly▲148Debug & Modify HTTP(s) Requests - loved by 125K+ web devs
2019 · requestly.com · its alternatives →
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Postman▲182Postman is a powerful HTTP client to test REST API
2014 · postman.com · its alternatives →
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First HTTP programming language
2025 · httl.dev · its alternatives →
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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 →
- 19PM
How to use the Scripting tool to modify the Request/Response by Javascript Code.
2020 · docs.proxyman.io · its alternatives →
- 20AS
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 · its alternatives →
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RequestBin▲117Inspect HTTP requests in a human-friendly way
2015 · pipedream.com · its alternatives →
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2022 · chrome.google.com · its alternatives →
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CtrlAI▲104Transparent proxy that secures AI agents with guardrails
Mar 2026 · 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 →