GraphQL Query Explainer

Debug Cannot query field faster

Most GraphQL failures are schema mismatches, wrong variable types, or nested selections that do not exist. Paste the query plus the error JSON from Apollo, urql, or your playground to get a plain-English explanation, root-cause diagnosis, concrete fixes, and often a rewritten query.

Common GraphQL errors this helps with

• Cannot query field X on type Y — typo, rename, or wrong nesting.
• Variable type mismatch — ID! vs String, nullability.
• Fragment / union issues — missing … on Type spreads.
• Auth / forbidden — when the error payload mentions permissions.
• “What does this query even fetch?” — explain mode without errors.

How to use the GraphQL explainer

1. Paste the operation (query, mutation, or subscription).
2. Paste the errors array or full response JSON if something failed.
3. Optionally paste a short schema excerpt for the types involved.
4. Click Explain / debug, apply the rewritten query, and re-run in your client.

GraphQL explainer FAQ

Do I need the full schema? No. A small excerpt around the failing type is enough; mark assumptions if fields are guessed.

Is my query stored? No. Processing uses Codeground’s self-hosted AI without persistence.

Does it execute against my API? No. It only analyzes the text you paste — no network calls to your GraphQL endpoint.

Subscriptions? Supported for explanation; runtime connection issues still need your client tooling.

Related: JSON Formatter · JSON Diff · SQL Assistant · Schema seed data