Modify request payloads
Simulate different responses
Mock GraphQL operations
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Your Development Companion
Intercept, modify, and mock GraphQL APIs effortlessly. Whether you’re debugging, testing edge cases, or switching environments, Requestly keeps your development smooth and fast.
Modify Requests & Responses
Intercept GraphQL requests and responses in real time. Change queries, variables, and operation names, or tweak response data and status codes without touching the backend.
Mock GraphQL APIs
Mock GraphQL queries or mutations using operationName. Return custom responses, static or dynamic.
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. Learn more -> 
Collaboration & 1-Click Sharing
Promote consistency and accelerate development by sharing Requestly rules within your team. 
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.