Vercel.AI.Mcp

Model Context Protocol client and transports.

Classes

Type	Summary
CallToolResults	Normalizes MCP tools/call results, including structured-only results.
HttpMcpTransport	MCP over Streamable HTTP. Posts JSON-RPC and accepts a JSON body or an SSE data: payload.
JsonRpcMessages	Checks JSON-RPC 2.0 requests, notifications, results, and errors.
McpAppFingerprint	SHA-256 fingerprint of an MCP app resource.
McpClient	Lists MCP tools and adapts them to Tool.
MCPClientError	An MCP call failed. Carries the JSON-RPC and HTTP details when the transport has them.
McpNdjson	Newline-delimited JSON used by the upstream stdio transport.
McpNdjson.Buffer	Buffer that reassembles newline-delimited messages split across chunks.
McpToolHeaders	Reads x-mcp-header annotations and encodes Mcp-Param- headers.
McpToolHeaders.Binding	One header bound to a tool argument path.
McpToolHeaders.BindingResult	Result of reading header bindings.
OAuthResources	OAuth resource URL checks from the MCP authorization helper.
SseMcpTransport	MCP over the legacy HTTP+SSE transport. StartAsync(CancellationToken) opens a GET event stream, waits for the endpoint event, then CancellationToken) posts JSON-RPC messages to that endpoint. Responses arrive on the stream.
StdioEnvironment	Environment passed to an MCP stdio child. The caller’s dictionary is not modified.
StdioMcpOptions	How to start an MCP stdio server. Mirrors the upstream StdioConfig.
StdioMcpTransport	MCP over a child process using newline-delimited JSON-RPC messages.

Type	Summary
IMcpTransport	Sends one JSON-RPC call and returns the result object.