API Request Tester
Web & network Network on demand
GraphQL Query & Schema Explorer
User-triggered networkRun, validate, document, and reproduce GraphQL operations with live or imported schemas.
Requests are sent only after a click. The endpoint receives visible headers and body, and browser CORS applies.
Document valid
query Countries {
countries {
code
name
emoji
}
}Run an operation to inspect its response.
How to use it
- 01
Compose an operation
Set the endpoint and headers, then edit a query or mutation with JSON variables and an operation name.
- 02
Load and explore the schema
Run explicit introspection or import SDL/introspection JSON, validate the document, and browse searchable type documentation.
- 03
Run and reproduce
Inspect data, errors, extensions, headers, timing and size, then restore redacted history or copy client code.
Frequently asked questions
Why can another client reach the endpoint while this page cannot?
Browsers enforce CORS. The GraphQL server must allow this site, method, and headers; otherwise use one of the generated server-side commands.
What if introspection is disabled?
Import schema SDL or an introspection JSON file locally. Query execution can still work even when the server refuses introspection.
Are authorization headers saved?
Recognized authentication, cookie, token, secret, and API-key headers are redacted before history is written to localStorage.
Does it support subscriptions?
This tool focuses on GraphQL over HTTP. Use WebSocket & SSE Tester to inspect WebSocket or SSE transports and their browser-visible messages.
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Keep working with other focused browser utilities.