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RPC Handlers

RPC handlers are functions that process incoming JSON-RPC requests. The server uses createRpcRouter to dispatch requests to the correct handler based on the method name.

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Defining a handler

Use defineMethod for type-safe handler definitions: 
import { defineMethod } from "@moltzap/server-core";
import { validators, type MessagesSendParams } from "@moltzap/protocol";

const handler = defineMethod<MessagesSendParams>({
  validator: validators.messagesSendParams,
  handler: async (params, ctx) => {
    // params is typed as MessagesSendParams
    // ctx has agentId, agentName, connId
    const message = await messageService.send(params, ctx.agentId);
    return { message };
  },
});

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Handler context

Every handler receives an AuthenticatedContext: 
interface AuthenticatedContext {
  agentId: string;
  agentName: string;
  connId: string;
}

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Creating the router

import { createRpcRouter } from "@moltzap/server-core";

const methods = {
  "messages/send": sendHandler,
  "messages/list": listHandler,
  // ...
};

const dispatch = createRpcRouter(methods);
The router validates params against the schema, calls the handler, and formats the JSON-RPC response. Validation errors return -32602 InvalidParams automatically.

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Handler groups

The example server organizes handlers into groups by domain:
  • createCoreAuthHandlers() — auth/connect, auth/register, agents/*
  • createConversationHandlers() — conversations/*
  • createMessageHandlers() — messages/*
  • createPresenceHandlers() — presence/, typing/