Smithery is an MCP (Model Context Protocol) servers registry, listing more than 2,000 MCP servers across multiple use cases:
  • Code related tasks (ex: GitHub, E2B)
  • Web Search Integration (ex: Brave, Browserbase)
  • Database Integration (ex: Neon, Supabase)
  • Financial Market Data
  • Data & App Analysis
  • And more…

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Adding a Smithery MCP Server to your Agent

1

Install AgentKit

Within an existing project, install AgentKit along with the Smithery SDK:
npm install @inngest/agent-kit inngest @smithery/sdk
2

2. Setup an AgentKit Newtork with an Agent

Create an Agent and its associated Network, for example a Neon Assistant Agent:
import { z } from "zod";
import {
  anthropic,
  createAgent,
  createNetwork,
  createTool,
} from "@inngest/agent-kit";

const neonAgent = createAgent({
  name: "neon-agent",
  system: `You are a helpful assistant that help manage a Neon account.
  IMPORTANT: Call the 'done' tool when the question is answered.
  `,
  tools: [
    createTool({
      name: "done",
      description: "Call this tool when you are finished with the task.",
      parameters: z.object({
        answer: z.string().describe("Answer to the user's question."),
      }),
      handler: async ({ answer }, { network }) => {
        network?.state.kv.set("answer", answer);
      },
    }),
  ],
});

const neonAgentNetwork = createNetwork({
  name: "neon-agent",
  agents: [neonAgent],
  defaultModel: anthropic({
    model: "claude-3-5-sonnet-20240620",
    defaultParameters: {
      max_tokens: 1000,
    },
  }),
  router: ({ network }) => {
    if (!network?.state.kv.get("answer")) {
      return neonAgent;
    }
    return;
  },
});
3

Add the Neon MCP Smithery Server to your Agent

Add the Neon MCP Smithery Server to your Agent by using createSmitheryUrl() from the @smithery/sdk/config.js module and providing it to the Agent via the mcpServers option:
import {
  anthropic,
  createAgent,
  createNetwork,
  createTool,
} from "@inngest/agent-kit";
import { createSmitheryUrl } from "@smithery/sdk/config.js";
import { z } from "zod";

const smitheryUrl = createSmitheryUrl("https://server.smithery.ai/neon/ws", {
  neonApiKey: process.env.NEON_API_KEY,
});

const neonAgent = createAgent({
  name: "neon-agent",
  system: `You are a helpful assistant that help manage a Neon account.
  IMPORTANT: Call the 'done' tool when the question is answered.
  `,
  tools: [
    createTool({
      name: "done",
      description: "Call this tool when you are finished with the task.",
      parameters: z.object({
        answer: z.string().describe("Answer to the user's question."),
      }),
      handler: async ({ answer }, { network }) => {
        network?.state.kv.set("answer", answer);
      },
    }),
  ],
  mcpServers: [
    {
      name: "neon",
      transport: {
        type: "ws",
        url: smitheryUrl.toString(),
      },
    },
  ],
});

const neonAgentNetwork = createNetwork({
  name: "neon-agent",
  agents: [neonAgent],
  defaultModel: anthropic({
    model: "claude-3-5-sonnet-20240620",
    defaultParameters: {
      max_tokens: 1000,
    },
  }),
  router: ({ network }) => {
    if (!network?.state.kv.get("answer")) {
      return neonAgent;
    }
    return;
  },
});
Integrating Smithery with AgentKit requires using the createSmitheryUrl() function to create a valid URL for the MCP server.Most Smithery servers instruct to use the createTransport() function which is not supported by AgentKit. To use the createSmitheryUrl() function, simply append /ws to the end of the Smithery server URL provided by Smithery.
You will find the complete example on GitHub:

Neon Assistant Agent (using MCP)

This examples shows how to use the Neon MCP Smithery Server to build a Neon Assistant Agent that can help you manage your Neon databases.
AgentsToolsNetworkIntegrations
Code-based Router