Transports
| Transport | Classification | Implementation |
|---|---|---|
| HTTP | Standard MCP Streamable HTTP subset | POSIX and Zephyr |
| stdio | Standard MCP | POSIX |
| CoAP | Experimental custom binding | POSIX/libcoap |
| MQTT 5 | Experimental custom binding | Portable binding core; native adapter required |
All bindings carry exact UTF-8 MCP JSON-RPC messages. CoAP resources and MQTT topics route messages; they do not replace MCP method names or JSON-RPC IDs.