Question 1

What is GraphQL?

Accepted Answer

GraphQL is a query language for APIs and a runtime for fulfilling those queries with existing data. It gives clients the power to ask for exactly what they need in a single request.

Question 2

Does this GraphQL tester send my queries to a server?

Accepted Answer

Your query is sent directly from your browser to the GraphQL endpoint URL you specify — it does not pass through our server. We never see or log your requests, headers or responses.

Question 3

Why do I get a CORS error?

Accepted Answer

Browsers block cross-origin requests unless the GraphQL server sends appropriate CORS headers. If you see a CORS error, the endpoint must be configured to allow your origin, or you need to use a proxy server.

Question 4

Can I send authentication headers?

Accepted Answer

Yes. Add any headers in the Headers text area as key: value pairs, one per line — Bearer tokens, API keys, cookies, etc.