HTTP Toolkit is an open-source app for capturing, inspecting, and mocking HTTP/HTTPS traffic, free with a paid Pro tier.
HTTP Toolkit is an open-source desktop application for debugging, testing, and building with HTTP traffic. It was founded in 2018 by developer Tim Perry, who is based in Barcelona, Spain, and continues to be the primary developer behind the project.
The app runs on Windows, Linux, and Mac, and lets developers intercept and inspect HTTP and HTTPS traffic from a wide range of sources, including Android and iOS apps, Docker containers, browsers, and backend server processes.
The free tier lets users intercept traffic with a largely one-click setup, inspect and search requests with content-type-aware parsing, pause live requests at breakpoints to edit them, and send custom requests to test APIs directly.
The paid Professional tier builds on this with automated mocking and rewrite rules that can redirect traffic, inject mock responses, or simulate errors and timeouts, along with the ability to import and export rule sets and validate traffic against a database of 2,600+ built-in API specifications.
HTTP Toolkit's Hobbyist tier is free and includes core interception, inspection, and manual request-editing features, covering the needs of individual developers doing occasional debugging.
The Professional tier is a paid subscription priced around €8/month on a monthly plan, with roughly a 25% discount for annual billing, and unlocks automated mocking and rewrite rules. A Team tier is available with per-user pricing and centralized billing for organizations, quoted on request.
Yes, the Hobbyist tier is free and includes core traffic interception and inspection features; a paid Professional tier adds mocking and rewrite rules.
HTTP Toolkit was created by developer Tim Perry, founded in 2018 and based in Barcelona, Spain.
Yes, the core HTTP Toolkit application is open source and available on GitHub, alongside paid Pro features.
HTTP Toolkit runs on Windows, Linux, and Mac, and can intercept traffic from Android, iOS, Docker, and browsers.
The Professional plan is priced around €8/month billed monthly, with a discount for annual billing.