Agents built with TanStack AI can now call OAuth-protected MCP servers through Vercel Connect, with no credentials for you to store or rotate.
The new @vercel/connect/tanstack-ai subpath exports connectMCPTransport, which takes a TanStack transport config and attaches a Connect-backed auth provider. The provider is called before every MCP request, so the token is always fresh.
If the user has not granted access, createMCPClient fails with a consent challenge before the model runs. Catch it with getConsentChallenge and redirect to Connect's consent URL. Otherwise, a consent error raised within a tool call would reach the model as an error string rather than the user as a redirect.
Read the TanStack AI integration docs to get started, or see the full list of supported frameworks and adapters for Vercel Connect.