Connect Vercel AI SDK to Willder

A TypeScript toolkit for model and tool calling.

Transport: Streamable HTTP · Auth: Authorization: Bearer <capability token> · Endpoint: https://willder.ai/api/mcp

Steps to connect: two, not one. One npm install, then the code under Config file. An SDK has no settings screen to paste into: the connection is code in your own program.

Verified end to end on 2026-10-05, against https://willder.ai/api/mcp on deployed commit 2eed3f05. Both of the client matrix's claims hold for this row: the server answered the transport and authentication shape this page configures, and the Vercel AI SDK itself connected, listed all ten Willder tools and answered one scoped memory_query.

See the index for what every other row says.

Get a token

Open Access → Tokens in your Willder workspace and issue a capability token for the narrowest scope that answers your questions. The value is shown once; only its hash is stored. Keep it in the client's secret storage or an environment variable — never in a committed file, a prompt or a screenshot.

export WILLDER_TOKEN='<your capability token>'

Config file

Your own code — no config file.

import { experimental_createMCPClient as createMCPClient } from "ai";
import { StreamableHTTPClientTransport } from "@modelcontextprotocol/sdk/client/streamableHttp.js";

const client = await createMCPClient({
  transport: new StreamableHTTPClientTransport(new URL("https://willder.ai/api/mcp"), {
    requestInit: { headers: { Authorization: `Bearer ${process.env.WILLDER_TOKEN}` } },
  }),
});
const tools = await client.tools();

The SDK's own transport: { type: ... } shorthand only builds the deprecated SSE transport — type: "http" throws Unsupported or invalid transport configuration. Streamable HTTP needs the MCP SDK's transport object, as above. Install it alongside ai:

npm install ai @modelcontextprotocol/sdk

Verify the connection

Object.keys(tools) includes memory_query. Pass tools to generateText and ask a scoped question.

See the index for the other clients and mcp/README.md for the tool surface and the token rules.