Aviationstack is a scalable REST API for real-time flight tracking, historical flight data, airport info, and global aviation data.
from $49.99/mo
About HTTP Toolkit
What is HTTP Toolkit?
HTTP Toolkit is an open-source tool for debugging, testing, and building with HTTP. It lets developers capture HTTP(S) traffic with zero setup, inspect and search requests, pause and edit live traffic, and send custom requests — all from a single interface.
Who is it for?
It's built for backend developers, QA engineers, API testers, and anyone building or debugging HTTP-based applications. It is NOT designed for non-technical users or for large-scale enterprise monitoring without additional configuration.
Real use cases
Use it to intercept traffic from Android/iOS apps, Docker containers, browser windows, or backend processes (Node.js, Java, Python, Ruby). Developers debug API calls, simulate error responses, analyze compression and caching, or mock server behavior without deploying changes.
Key features
- One-click intercept — Capture HTTP(S) traffic from any client without configuration.
- Powerful inspect & search — Filter and browse traffic with content-type categorization, status, headers, and body parsing.
- Live breakpoints — Pause in-flight HTTP requests, edit headers/body, redirect, or close connections.
- Send custom requests — Fully featured HTTP client for API exploration and testing.
- Automated rules — Mock responses, transform messages, inject errors and timeouts automatically.
- Import & export — Save/load rules, traffic sessions, and export requests as ready-to-use code.
SaaSpartout Score
7.5
/10
Editorial score from our review methodology — not user ratings.
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HTTP Toolkit Pricing
HTTP Toolkit pricing: Free open-source / Pro from $0/mo. Billing model: Freemium.
For comparison: the median starting price in Developer Tools is $19.99/month, measured across 301 tools we track. See the full SaaS Pricing Index →
Hobbyist (Free)
Open-source core: Intercept all clients, inspect raw HTTP data, filter sessions, rewrite traffic manually, send custom HTTP requests. No automated rules, no supercharged debugging tools, no import/export.
Pro (Paid)
Adds automated rules (mock responses, transform messages, inject errors/timeouts), rule creation from real traffic, build custom filter aliases, edit & resend intercepted requests, analyze HTTP compression & caching, docs for 2600+ APIs, import/export rules and traffic, export requests as code, advanced configuration (proxy port, HTTP versions, TLS settings, upstream proxies, custom OpenAPI specs, UI themes). Licensed to a single individual with transferrable licenses.
Team (Contact for pricing)
All Pro features plus centralized payment and account management. Contact HTTP Toolkit for details.
HTTP Toolkit is open-source so you can start free with the Hobbyist plan. No time-limited trial — the open-source plan is always free.
Frequently asked questions
Is HTTP Toolkit free?
Yes, HTTP Toolkit offers a free, fully open-source Hobbyist plan with core features like intercepting all supported clients, inspecting raw HTTP data, and manually rewriting traffic.
How much does HTTP Toolkit cost?
The Hobbyist plan is free. The Pro plan is paid and includes automated rules, advanced debugging, import/export, and configuration features. Team pricing is available on request.
What is HTTP Toolkit used for?
HTTP Toolkit is used for intercepting, debugging, and testing HTTP traffic. It helps developers inspect API calls, mock server behavior, modify live traffic, and analyze HTTP performance.
Who is HTTP Toolkit best for?
It is best for backend developers, QA engineers, API testers, and anyone building or debugging HTTP-based applications on Windows, Linux, or Mac.
What are alternatives to HTTP Toolkit?
Alternatives include Fiddler, Charles Proxy, Wireshark (for lower-level protocols), and browser DevTools. HTTP Toolkit distinguishes itself with a modern UI, open-source core, and one-click interception for many platforms.
Can HTTP Toolkit intercept HTTPS traffic?
Yes, HTTP Toolkit can intercept HTTPS traffic with zero setup. It automatically handles certificate generation and trust configuration for supported clients.
