application/graphql

application/graphql is used to POST a raw GraphQL query as the request body. Most GraphQL servers, however, expect a JSON body with a `query` field — check your target server before using this type.

GraphQL client libraries that send raw query strings.

The GraphQL over HTTP working draft standardizes application/json (with a JSON wrapper) as the preferred body format. Prefer JSON unless your server explicitly supports application/graphql.

This media type is not officially registered with IANA. It is widely used in practice, but strict clients or standards-conformant tooling may not recognize it — check your consumer's tolerance.