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API Client

A lightweight and secure API Client for faster API Development & Testing

HTTP Interceptor

A Powerful HTTP Interceptor to Intercept, Record, Debug & Modify HTTP Requests

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Requestly vs Postman
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📣 Requestly – Modern git-based API Client. No login required. Switch from Postman in 1 click. Try now ->

Replace String

Dynamically replace web strings, simplify testing

Switch Hosts

Redirect API Calls for Testing

Seamlessly Switch API Environments​

Test New API Versions Without Code Changes

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Documentation ->
4.5 ⭐  1700+ Ratings, 300,000+  developers
Redirect URLs
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Trusted by 300,000+ developers from Fortune 500 companies.

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Your Development Companion

Gain comprehensive control over APIs for testing, switching environments and accelerating your development.

Replace Multiple parts of a URL

With pinpoint accuracy, target and replace multiple URL components – hostname, path segments, query parameters, and more – for granular control over your requests.
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modify and mock graphql, apis replace ulr

Supports APIs triggered as XHR or fetch

Gain control over API responses triggered by XHR/Fetch requests. switch between staging, and production without touching your codebase,
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GraphQL Support

Test Staging GraphQL APIs with Production frontend, making sure all the operations are working properly.
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Match URLs using Regex

Use regular expressions to achieve intricate URL pattern matching without the need for overly complex, indirect approaches. This grants you granular control over your URL replacements in a more streamlined manner.
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modify request body | match urls using regex

Collaboration & 1-Click Sharing

Promote consistency and accelerate development by sharing Requestly rules within your team.
collaboration 1 click sharing

More Features

More features for your testing needs

These HTTP Rules designed for all your local development and testing needs.
Modify Responses
Intercept, Modify & Mock API Responses in Real-Time
Replace string
Replace part of URL like hostname, query values.
Redirect URL
Redirect any URL to a new destination.
Modify Headers
Modify HTTP request & response headers.
Query params
Add or Remove Query Parameters
Insert scripts
Inject Custom JS & CSS on any website(s).
Delay network
Simulate delay in response of API calls.
Modify request body
Modify body of website or application POST requests.

Built for teams

Effortless team collaboration

Share instantly, sync effortlessly, and collaborate effectively with your team in dedicated workspaces.
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Quick One time sharing

Instantly generate and share a link to your rules and more

Team workspaces

Collaborate easily with teammates in a shared workspace.

Export data & sync to Git

Easily version-control your configs by exporting and syncing

Secure and private

Enterprise-ready security and compliance

Requestly ensures top-tier security with SOC-II compliance, SSO integration, and role-based access control. We protect your data and secure your workflows, making us the ideal choice for enterprises.
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Requestly security and compliance

SOC-II Compliance

Adheres to rigorous security standards for data protection and privacy.

Single Sign-On (SSO)

Simplifies user access with secure, centralized authentication.

Role-based access control

Ensures precise control over user permissions and data access.

Data encryption

Protects your data in transit and at rest with advanced encryption protocols.

Audit logs

Tracks and records user actions and system events, giving you complete visibility.

Regular security updates

Keeps your environment secure with timely updates and patches.
Customers love us

Loved by developers around the World

Developers around the world trust us to simplify debugging, speed up workflows, and make development more efficient.

★★★★★ on Chrome store

Requestly is the first API client that has genuinely replaced Postman for me. Everything runs locally, so my API data never has to go through a cloud server. There’s no mandatory login, no unnecessary bloat, and no pressure to upgrade just to keep using the same workflow. It feels faster, simpler, and much more aligned with how developers actually want to work.

★★★★★ on Chrome store

Postman stopped fitting the way our team works. We wanted our API collections in Git, not locked inside another tool. Requestly stores everything as plain JSON files in a local directory, which gives us full control over versioning, reviews, and collaboration.

★★★★★ on Chrome store

My absolute favorite web debugging proxy and API client. I use it nearly every day for work to modify HTTP requests, test and mock API calls, inject JS snippets into sites, etc. The Requestly team is incredible — I once submitted a bug report and it was closed out within an hour. Also just kind, passionate people. I can't recommend Requestly enough.

★★★★★ on Chrome store

Absolutely love the API Client feature! It’s like Postman, but better integrated into my daily workflow. Modifying API responses directly from the same tool I use for debugging is such a time-saver. Great job, Requestly team, for constantly innovating!

★★★★★ on Chrome store

We recently migrated from Postman to Requestly’s API Client, and it has been a great experience. The ability to store collections locally, keep them in Git, and work with simple JSON files made the transition seamless and much more developer-friendly.

Requestly is an incredibly useful tool for developers working on a large team with multiple staging envs, or numerous app endpoints for various APIs in a local environment. The Sessions feature is especially useful for documenting solutions or sharing with others since it captures the relevant network traffic, and screen recording enables others to easily reproduce. Requestly combines all the power of complicated tools like Charles Proxy and Postman in one app/chrome extension. I highly recommend giving it a try if you haven't already–it will make your dev work so much easier. (Summarized)

Requestly is user-friendly, brilliant and easy-to-use. I use it on an daily basis and it makes my work easier. After using other tools like Charles - Requestly is a nice new breath of air that I highly vouch for. Apart from the tool being amazing - the support from the Requestly team is phenomenal with them always going above and beyond for their clients.

App works as expected! Ran into some small issues while creating the rules but the support team was able to help and overcome those.

Frequently Asked Questions​

There are frequently asked questions related to Requestly

What does the Replace Rule do in Requestly?

The Replace Rule lets you find and replace specific text in network responses directly in the browser. This helps you modify API responses, HTML, JavaScript, CSS, or other text-based resources without changing the actual server response.

What kind of content can I modify using the Replace Rule?

You can replace text in API responses, HTML pages, JavaScript files, CSS files, JSON responses, and other text-based resources. As long as the response contains searchable text, you can modify it during interception.

Is Requestly open-source

Feel free to check out the GitHub repo

Is the Replace Rule available in the free plan?

Yes, the Replace Rule is available in Requestly’s free plan, allowing you to intercept and modify responses without requiring a paid subscription.

Do I need a paid plan to create multiple Replace rules?

No, you can create and use Replace rules on the free plan. Paid plans mainly unlock collaboration, syncing, and advanced team workflows.

Is Requestly free for students?

Yes! Requestly is free for students, enjoy access to powerful tools and features with no cost.

Why is my text not getting replaced?

The response content may not exactly match your search text, or the response may be compressed, cached, or dynamically generated. Inspect the actual network response in browser DevTools and verify the exact text being returned.

Why Aren’t My Requestly Rules Working?

Rule not working doc

How do I replace an API response value using Requestly?

Create a Replace Rule, add the API endpoint in the source condition, enter the text you want to find, provide the replacement value, save the rule, and refresh your application. Matching responses will now return the modified value.

How do I replace environment URLs in JavaScript files?

Target the JavaScript file URL, search for the existing API base URL or environment string, replace it with your desired value, and reload the application to test the new environment.

How do I replace multiple values in the same response?

Add multiple find-and-replace pairs inside a single Replace Rule. Requestly will process all configured replacements on matching responses.