create_group

Instructions

Implementation Reference

• src/tools/groups.ts:30-38 (handler)

  The handler function for the 'create_group' tool. It accepts sessionId, name, and participants, then makes a POST request to /sessions/{sessionId}/groups with the group name and participants array.

    async ({ sessionId, name, participants }) => {
      const data = await openwaClient({
        method: "POST",
        path: `/sessions/${sessionId}/groups`,
        body: { name, participants },
      });
      return { content: [{ type: "text" as const, text: JSON.stringify(data, null, 2) }] };
    }
  );

• src/tools/groups.ts:24-28 (schema)

  Input schema/type definitions for the 'create_group' tool using Zod: sessionId (string), name (string), and participants (array of strings).

  inputSchema: {
    sessionId: z.string().describe("Session ID"),
    name: z.string().describe("Group name"),
    participants: z.array(z.string()).describe("Array of participant phone IDs to add"),
  },

• src/tools/groups.ts:20-38 (registration)

  Registration of the 'create_group' tool on the MCP server via server.registerTool().

  server.registerTool(
    "create_group",
    {
      description: "Create a new WhatsApp group with specified participants",
      inputSchema: {
        sessionId: z.string().describe("Session ID"),
        name: z.string().describe("Group name"),
        participants: z.array(z.string()).describe("Array of participant phone IDs to add"),
      },
    },
    async ({ sessionId, name, participants }) => {
      const data = await openwaClient({
        method: "POST",
        path: `/sessions/${sessionId}/groups`,
        body: { name, participants },
      });
      return { content: [{ type: "text" as const, text: JSON.stringify(data, null, 2) }] };
    }
  );

• src/index.ts:7-18 (registration)

  Import of registerGroupTools from groups.ts and invocation at line 18 to register all group tools including 'create_group'.

  import { registerGroupTools } from "./tools/groups.js";
  import { registerContactTools } from "./tools/contacts.js";
  import { registerWebhookTools } from "./tools/webhooks.js";
  import { registerLabelTools } from "./tools/labels.js";
  import { registerMediaTools } from "./tools/media.js";
  
  const server = new McpServer({ name: "openwa-mcp", version: "1.0.0" });
  
  registerSessionTools(server);
  registerMessageTools(server);
  registerBulkTools(server);
  registerGroupTools(server);

• src/client.ts:10-30 (helper)

  The openwaClient helper function used by the handler to make HTTP requests to the OpenWA API.

  export async function openwaClient<T = unknown>(opts: RequestOptions): Promise<T> {
    const url = `${BASE_URL}${opts.path}`;
  
    const headers: Record<string, string> = {
      "Content-Type": "application/json",
      "X-API-Key": API_KEY,
    };
  
    const res = await fetch(url, {
      method: opts.method,
      headers,
      body: opts.body ? JSON.stringify(opts.body) : undefined,
    });
  
    const text = await res.text();
  
    if (!res.ok) {
      throw new Error(`OpenWA API ${res.status}: ${text}`);
    }
  
    try {