The following is a list of web service protocols.
- BEEP - Blocks Extensible Exchange Protocol
- CTS - Canonical Text Services Protocol
- E-Business XML
- Hessian
- Internet Open Trading Protocol
- JSON-RPC
- JSON-WSP
- SOAP - outgrowth of XML-RPC, originally an acronym for Simple Object Access Protocol
- Universal Description, Discovery, and Integration (UDDI)
- WebSocket
- Web Processing Service (WPS)
- WSCL - Web Services Conversation Language
- WSFL - Web Services Flow Language (superseded by BPEL)
- XINS Standard Calling Convention - HTTP parameters in (GET/POST/HEAD), POX out
- XLANG - XLANG-Specification (superseded by BPEL)
- XML-RPC - XML Remote Procedure Call