DevPost - API Debugger for DevTools

API debugger inside Chrome DevTools. Send requests, capture network traffic, manage collections and environments — no tab switching.

You're deep in a debugging session, chasing down a broken API call — and every second spent switching to Postman, copying URLs, and switching back is flow you never get back. DevPost is a lightweight API debugging tool that lives permanently inside Chrome DevTools. Open the DevPost panel and you're already in context — the page you're debugging, the requests you're watching, all in one window. ─── Core Features ─── ▸ Request Builder Supports GET, POST, PUT, DELETE, PATCH, HEAD, and OPTIONS. Configure query params, headers, and request bodies (JSON, form-data, URL-encoded, XML, Raw). Basic Auth, Bearer Token, and API Key authentication built in. Import any request from cURL in one click. ▸ Network Capture Intercept HTTP/HTTPS requests made by the current page in real time. Inspect and replay captured requests directly in DevPost. Start and stop capture whenever you need it. ▸ Collections Save requests into named groups. Rename, reorder, and delete collections freely. Load any saved request with a single click. ▸ Request History Every request you send is automatically recorded. Search history, re-run past requests, and clear it when you're done. ▸ Environment Variables Create multiple environments (dev, staging, prod, and more). Reference variables with {{VARIABLE_NAME}} syntax anywhere in URL, headers, or body. Values are substituted automatically on send. ▸ Response Viewer JSON responses are syntax-highlighted and pretty-printed. Image responses render inline. PDF responses open in an embedded viewer. Raw response headers are always accessible. ▸ 22 Languages UI language follows your browser locale by default. Manually switch between English, 简体中文, 繁體中文, 日本語, 한국어, Español, Français, Deutsch, Italiano, Português, Русский, العربية, हिन्दी, Türkçe, Polski, Nederlands, Svenska, Dansk, Norsk, Suomi, Čeština, and Tiếng Việt. ─── Privacy ─── DevPost does not collect, transmit, or store any user data outside of your local browser. All request data, collections, and environment variables are saved exclusively in chrome.storage.local on your own device. No analytics, no telemetry, no external servers. ─── Permissions ─── • storage — saves your collections, history, and environment variables locally • contextMenus — adds a right-click option to import selected cURL text directly • host_permissions (<all_urls>) — required to capture and proxy network requests on any domain you choose to debug ─── How to Use ─── 1. Install the extension 2. Open Chrome DevTools (F12 or right-click → Inspect) 3. Click the "DevPost" panel tab 4. Build and send your first request — or click "Capture" to intercept live traffic ============================================================