How to Use the Nhost MCP in Vercel AI SDK

Q: How do I handle Nhost user registration inside a Vercel AI SDK chat interface?

Call signupemailpassword or signupotpemail directly within your stream text tool definition. The client executes the tool, registers the user on Nhost, and streams the confirmation message back to the UI.

Q: Can Vercel AI SDK stream files directly from Nhost storage?

Yes, by calling getfile inside your tool execution flow. The agent retrieves the raw file content and streams the data chunk by chunk to the frontend, which is ideal for displaying images or reading text files.

Q: How does Nhost handle expired user sessions in a Vercel AI SDK app?

The agent calls refreshtoken to fetch a new JWT when the current session expires. This keeps the connection to your backend alive without forcing the user to log in again.

Q: Can I run anonymous sessions with this integration?

Use signinanonymous to create temporary sessions. This lets guest users interact with your application and upload files before they commit to a full email registration.

Build live-streaming auth and storage interfaces in Next.js using the Vercel AI SDK and Nhost via this MCP Server.

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Connect Nhost MCP to Vercel AI SDK

Create your Vinkius account to connect Nhost to Vercel AI SDK and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

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Setup Nhost with Vercel AI SDK

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Stream auth state changes in Vercel AI SDK

The `signin_email_password` tool lets your agent log users in and instantly stream the resulting session state to your React frontend. Instead of waiting for a full page reload, the client handles the JWT response in real-time. You can also trigger password resets with `reset_password` or register accounts via `signup_email_password` directly within a chat component. The user sees the status update the millisecond the Nhost backend responds.

Direct file uploads via MCP Server tools

The `upload_file` tool sends files to your storage buckets and pipes the resulting metadata directly into the streaming UI. Your agent handles the transfer without blocking the main thread, making file uploads feel instantaneous. When users need to download assets, the agent calls `get_file_presigned_url` to fetch secure links on demand. It bypasses heavy backend middleware entirely, routing the request through the edge network for minimum latency.

Background session management

The `refresh_token` tool keeps your agent authenticated by exchanging expired tokens for fresh credentials in the background. It prevents broken chat sessions by maintaining a live connection to the database. When the user decides to log out, the agent triggers `signout` to instantly invalidate the active session. The UI updates immediately, clearing the local state without requiring a manual browser refresh.

Setup guide

Set up Nhost MCP in Vercel AI SDK

Prerequisites

Node.js 18+ and a TypeScript project
ai + @modelcontextprotocol/sdk packages
Active Vinkius subscription with a valid endpoint token

1

Install dependencies

Run npm install ai @modelcontextprotocol/sdk plus your preferred model provider (e.g. @ai-sdk/openai).
2

Create the Streamable HTTP transport

Use StreamableHTTPClientTransport with your Vinkius endpoint URL. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com.
3

Discover and use tools

Call mcpClient.tools() to auto-discover all Nhost tools. Pass them directly to generateText() or streamText() — no manual schema definitions needed.
4

Works with any model provider

Swap openai("gpt-4o") for any AI SDK provider — Anthropic, Google, Mistral. The MCP tools work identically across all supported models.

index.ts

import { experimental_createMCPClient as createMCPClient } from "ai";
import { StreamableHTTPClientTransport } from "@modelcontextprotocol/sdk/client/streamableHttp";
import { generateText } from "ai";
import { openai } from "@ai-sdk/openai";

const transport = new StreamableHTTPClientTransport(
  new URL("https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp")
);

const mcpClient = await createMCPClient({ transport });
const tools = await mcpClient.tools();

const { text } = await generateText({
  model: openai("gpt-4o"),
  tools,
  prompt: "List recent Nhost transactions",
});

console.log(text);
await mcpClient.close();

Get your connection token →

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Common questions about Nhost MCP in Vercel AI SDK

Call `signup_email_password` or `signup_otp_email` directly within your stream text tool definition. The client executes the tool, registers the user on Nhost, and streams the confirmation message back to the UI.

Yes, by calling `get_file` inside your tool execution flow. The agent retrieves the raw file content and streams the data chunk by chunk to the frontend, which is ideal for displaying images or reading text files.

The agent calls `refresh_token` to fetch a new JWT when the current session expires. This keeps the connection to your backend alive without forcing the user to log in again.

Use `signin_anonymous` to create temporary sessions. This lets guest users interact with your application and upload files before they commit to a full email registration.

Absolutely. Raw credentials like passwords and JWTs are processed in an isolated V8 sandbox and never cached. The server only passes these sensitive tokens directly to your backend over encrypted HTTPS connections.

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