horde/rpc

RPC library

v3.0.0beta3 2026-04-09 00:00 UTC

Requires

• php: ^8.2
• horde/core: ^3 || dev-FRAMEWORK_6_0
• horde/dav: ^2 || dev-FRAMEWORK_6_0
• horde/exception: ^3 || dev-FRAMEWORK_6_0
• horde/horde-installer-plugin: dev-FRAMEWORK_6_0 || ^3 || ^2
• horde/perms: ^3 || dev-FRAMEWORK_6_0
• horde/serialize: ^3 || dev-FRAMEWORK_6_0
• horde/support: ^3 || dev-FRAMEWORK_6_0
• horde/translation: ^3 || dev-FRAMEWORK_6_0
• horde/util: ^3 || dev-FRAMEWORK_6_0
• horde/xml_element: ^3 || dev-FRAMEWORK_6_0
• psr/event-dispatcher: ^1.0
• psr/http-client: ^1.0
• psr/http-factory: ^1.0
• psr/http-message: ^1.1 || ^2.0
• psr/http-server-handler: ^1.0
• psr/http-server-middleware: ^1.0

Requires (Dev)

• horde/activesync: ^3 || dev-FRAMEWORK_6_0
• horde/http: ^3 || dev-FRAMEWORK_6_0

Suggests

• ext-soap: *
• ext-xmlrpc: *
• horde/activesync: ^3 || dev-FRAMEWORK_6_0
• horde/eventdispatcher: ^3 || dev-FRAMEWORK_6_0
• horde/http: ^3 || dev-FRAMEWORK_6_0
• horde/lock: ^3 || dev-FRAMEWORK_6_0
• horde/syncml: ^3 || dev-FRAMEWORK_6_0

LGPL-2.1-only

• Jan Schneider
• Michael J Rubinsky
• Chuck Hagenbuch

• soap
• json-rpc
• jsonrpc
• psr-15
• activesync

README

RPC adapters for Horde's API system. Modern implementations share a dispatch layer (ApiProviderInterface, MethodInvokerInterface) across protocols — write a provider once, serve it over JSON-RPC, MCP, and SOAP.

Protocols

JSON-RPC

Modern	src/JsonRpc/ — PSR-7/15/18, JSON-RPC 1.1 and 2.0
Legacy	lib/Horde/Rpc/Jsonrpc.php
Docs	doc/JSONRPC-USAGE.md

MCP (Model Context Protocol)

Modern	src/Mcp/ — MCP spec, Streamable HTTP transport
Docs	doc/MCP-USAGE.md

SOAP

Modern	src/Soap/ — PSR-15, ext-soap (optional) in WSDL-less mode
Legacy	lib/Horde/Rpc/Soap.php
Docs	doc/SOAP-USAGE.md

XML-RPC

Legacy	lib/Horde/Rpc/Xmlrpc.php — requires ext-xmlrpc, will probably not work in most modern PHP installations XML-RPC spec

Delegation Protocols

These delegate to other Horde packages:

• ActiveSync — lib/Horde/Rpc/ActiveSync.php → horde/activesync
• WebDAV / CalDAV / CardDAV — lib/Horde/Rpc/Webdav.php → horde/dav
• SyncML — lib/Horde/Rpc/Syncml.php → horde/syncml (deprecated)
• PHPGroupware XML-RPC — lib/Horde/Rpc/Phpgw.php (deprecated)

Shared Dispatch Layer

JsonRpcHandler ──┐
McpServer ───────┤── ApiProviderInterface / MethodInvokerInterface
SoapHandler ─────┘

Providers

CallableMapProvider - a generic map of callables to API names MathApiProvider - an educational example API provider HordeRegistryApiProvider - Integrates the Horde Registry Inter-App API

All modern handlers implement both RequestHandlerInterface and MiddlewareInterface for flexible middleware stacking.