# Query Service
The data module provides a query service for querying the state of the data module. The queries are defined in the proto files available on Buf Schema Registry (opens new window).
For examples on how to query state using gRPC and REST, see the data client documentation, and for examples using the regen
binary, see regen query data.
- AnchorByHash (opens new window)
- AnchorByIRI (opens new window)
- AttestationsByAttestor (opens new window)
- AttestationsByHash (opens new window)
- AttestationsByIRI (opens new window)
- ConvertHashToIRI (opens new window)
- ConvertIRIToHash (opens new window)
- Resolver (opens new window)
- ResolversByIRI (opens new window)
- ResolversByHash (opens new window)
- ResolversByURL (opens new window)
← Msg Service Events →