Alternatives

Products that do what Open-Source HTTP Interceptor – Capture, Modify, Run Requests in Browser does

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:…

1IR
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
2
Nix Capture▲88
Capture API requests for bug reports in seconds
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3
Requestly 2.0▲112
Intercept & modify HTTP requests
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4
Middleman▲136
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5HM
HTTP Mock – Intercept, debug and mock HTTP(S) with zero setup▲341
2019 · httptoolkit.tech
6
Requestly▲148
Debug & Modify HTTP(s) Requests - loved by 125K+ web devs
2019
7
Postman Interceptor▲78
Postman companion to sync cookies & capture network requests
2020
8
LambdaTest Chrome Extension▲191
Cross browser testing by taking full-page screenshots
2018
9
HTTP Catcher▲81
Web debugging proxy for iOS
2019
10
BugShot▲115
Discover, fix, capture, and report bugs in one shot
Jul 2026 · bug-shot.com
11HR
Hurl – Run and test HTTP requests with plain text, curl and Rust▲223
2021 · hurl.dev
12ED
Endpoints.dev – Pastebin for HTTP Requests▲201
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13
Capture▲113
Fast browser API to capture, extract, & create from web
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14
Proxy API for Web Scraping▲84
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Vouch Chrome Extension▲206
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Capture by Neutron Creative▲83
Web screenshots via API, made easy & open-source.
2020
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Quick Capture▲85
Capture, upload, edit and share screenshots to Slack
2018
18PI
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
19
FlowLens▲134
Bug reports built for coding agents, so you can ship faster.
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20
HTTP View▲126
Supercharged HTTP(S) debugging, in one click
2019
21
Snapup▲86
Capture anything you want on the web, incredibly quickly
2020
22
Copycat▲120
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2019
23HI
Hurl.it is back – Make HTTP Requests▲73
2021 · hurlit.com
24IM
Interceptor – mock AJAX requests at the browser level▲60
2018 · crypt.codemancers.com

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