| Code | Category | Description |
|---|---|---|
| HC0001 | Scalars | The runtime type is not supported by the scalars ParseValue method. |
| HC0002 | Scalars | Either the syntax node is invalid when parsing the literal or the syntax node value has an invalid format. |
| HC0003 | Apollo Federation | The key attribute is used on the type level without specifying the fieldset. |
| HC0004 | Apollo Federation | The provides attribute is used and the fieldset is set to null or string.Empty. |
| HC0005 | Apollo Federation | The requires attribute is used and the fieldset is set to null or string.Empty. |
| HC0006 | Schema Stitching | The HTTP request failed. |
| HC0007 | Schema Stitching | Unknown error happened while fetching from a downstream service. |
| HC0008 | Execution | An unexpected error happened during execution task processing. |
| HC0009 | Server | The GraphQL request structure is invalid. |
| HC0010 | Server | The request is larger then maximum allowed request size. |
| HC0011 | Server | The GraphQL request has syntax errors. |
| HC0012 | Server | Unexpected request parser error. |
| HC0013 | Server | The query and the id is missing from the GraphQL request. |
| HC0014 | Execution | The GraphQL document has syntax errors. |
| HC0015 | Execution | No query document was provided and the provided query id is unknown. |
| HC0016 | Execution | Variable xyz got an invalid value. |
| HC0017 | Execution | Variable xyz is not an input type. |
| HC0018 | Execution | Variable xyz is required. |