Alternatives

Products that do what Middleman does

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

1
Requestly 2.0▲112
Intercept & modify HTTP requests
2021
2IR
Intercept.rest – Faster API debugging▲89
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
3
Cloud Middleman▲85
The only web debugging proxy that runs in the cloud
2017
4
Postman Interceptor▲78
Postman companion to sync cookies & capture network requests
2020
5
Proxyman▲196
An modern and intuitive HTTP debugging proxy
2019
6HM
HTTP Mock – Intercept, debug and mock HTTP(S) with zero setup▲341
2019 · httptoolkit.tech
7PM
Proxyman – Modify HTTP Request/Response by JavaScript Code with Ease▲6
2020 · docs.proxyman.io
8
httpbin(1)▲105
HTTP request and response service
2014
9
HTTP Prompt▲128
An interactive command-line HTTP client
2016
10OS
Open-Source HTTP Interceptor – Capture, Modify, Run Requests in Browser▲5
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
11
Requestly▲148
Debug & Modify HTTP(s) Requests - loved by 125K+ web devs
2019
12ED
Endpoints.dev – Pastebin for HTTP Requests▲201
2020 · endpoints.dev
13
Postman▲182
Postman is a powerful HTTP client to test REST API
2014
14IM
Interceptor – mock AJAX requests at the browser level▲60
2018 · crypt.codemancers.com
15NJ
Node.js middleware for unifying the way you send HTTP response statuses▲8
2014 · github.com
16
RequestBin▲117
Inspect HTTP requests in a human-friendly way
2015
17
Endpoints▲114
View and respond to requests on an HTTP endpoint
2018
18
Decoy▲99
Local server mocks in macOS, all in a lightweight native app
Mar 2026
19
CtrlAI▲104
Transparent proxy that secures AI agents with guardrails
Mar 2026
20HI
Hurl.it is back – Make HTTP Requests▲73
2021 · hurlit.com
21HA
HTTPLang – a scripting language for making HTTP requests▲44
2015 · github.com
22PI
Prompt-injection firewall for OpenClaw agents▲6
People seem to be blindly hooking up their OpenClaw’s to their personal data. So, I built runtime controls to prevent at the least, very simple prompt injection attacks. Once installed, it hooks to Node.js child_process module in the gateway process and listens to tool calls and their response streams. And a fetch hook to monitor user prompts (both could’ve been through fetch, happy to discuss why this whole layer couldn’t just be a proxy). There are two layers of protection: First: Whenever there is a read-only tool call whose response an attacker can modify, we extract that part of the…
Feb 2026 · github.com
23RR
RequestHub – Receive, Log, and Proxy HTTP Requests▲17
2015 · github.com
24DA
Decoy – A native Mac app for mocking HTTP endpoints locally▲7
Feb 2026 · decoy-app.com

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