# diameter v2.6.1 - API Reference

## Modules

- [diameter](diameter.md): Main API of the diameter application.
- [diameter_app](diameter_app.md): Callback module of a Diameter application.
- [diameter_codec](diameter_codec.md): Decode and encode of Diameter messages.
- [diameter_make](diameter_make.md): Diameter dictionary compilation.
- [diameter_sctp](diameter_sctp.md): Diameter transport over SCTP.
- [diameter_service](diameter_service.md)
- [diameter_tcp](diameter_tcp.md): Diameter transport over TCP.
- [diameter_transport](diameter_transport.md): Diameter transport interface.