Open-Source API Mocking & Testing Tool

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Redirect URL Replace Rule Modify API Response Modify Headers Insert Scripts Modify Query Param Cross Device Test GraphQL APIs
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Compare Requestly with
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How to Guides

Redirect Your Local Ad Server to Production for 2x Faster Development

Block a header bidding script on websites to isolate testing of other scripts.

Easily Test your Local RTB Scripts on Production Without Deploying​

Simplify Demos by Directly Testing Ads on Client Websites​

How to Simulate Different Devices Using User-Agent

Test How Your System Handles Geo-Targeting Information

A/B test bundles on production to evaluate their performance.

Case Studies

How Blockthrough uses Requestly to seamlessly test their JS on publisher websites

Breaking Hardware Testing Barriers: Plume’s Journey with Requestly’s API Mocking

From hours to minutes: Stay22’s Journey to Faster Script Deployment with Requestly

Optimizing Ad Delivery with Requestly : Adpushup’s Story