WeChat Mini Program Dev MCP

Instructions

Implementation Reference

• src/tools/application.ts:215-235 (handler)

  The execute handler for the 'mp_callWx' tool. It parses input arguments, invokes the miniProgram.callWxMethod with the specified method and args, formats the result, and returns it as text content.

  execute: async (rawArgs, context: ToolContext) => {
    const args = callWxMethodParameters.parse(rawArgs ?? {});
    return manager.withMiniProgram<ContentResult>(
      context.log,
      { overrides: args.connection },
      async (miniProgram) => {
        const callArgs = args.args ?? [];
        const result = await miniProgram.callWxMethod(
          args.method,
          ...callArgs
        );
        return toTextResult(
          formatJson({
            method: args.method,
            arguments: callArgs,
            result: toSerializableValue(result),
          })
        );
      }
    );
  },

• src/tools/application.ts:44-47 (schema)

  Zod schema defining the input parameters for the 'mp_callWx' tool: connection (from common), required method string, and optional array of arguments.

  const callWxMethodParameters = connectionContainerSchema.extend({
    method: z.string().trim().min(1),
    args: z.array(z.unknown()).optional(),
  });

• src/tools/application.ts:211-236 (registration)

  The tool object definition and registration within createCallWxMethodTool function, specifying name 'mp_callWx', description, parameters schema, and execute handler.

  return {
    name: "mp_callWx",
    description: "调用微信小程序 API 方法。",
    parameters: callWxMethodParameters,
    execute: async (rawArgs, context: ToolContext) => {
      const args = callWxMethodParameters.parse(rawArgs ?? {});
      return manager.withMiniProgram<ContentResult>(
        context.log,
        { overrides: args.connection },
        async (miniProgram) => {
          const callArgs = args.args ?? [];
          const result = await miniProgram.callWxMethod(
            args.method,
            ...callArgs
          );
          return toTextResult(
            formatJson({
              method: args.method,
              arguments: callArgs,
              result: toSerializableValue(result),
            })
          );
        }
      );
    },
  };

• src/tools/application.ts:60-60 (registration)

  Registration of the mp_callWx tool by including it in the array returned by createApplicationTools.

  createCallWxMethodTool(manager),

• src/tools.ts:9-9 (registration)

  Top-level registration where application tools, including mp_callWx, are composed into the full tools array.

  ...createApplicationTools(manager),