1,157 pages for head.
Titles and paths first, then pages whose text carries it. Each row opens that page as this site last read it.
Overview
Model Context Protocol · in the page
specification/draft/basic/transports/index
…elope metadata. The Streamable HTTP transport mirrors them into [HTTP headers](https://modelcontextprotocol.io/specification/draft/basic/transports/streamable-http.md#request-metadata) so that interme…
stdio
Model Context Protocol · in the page
specification/draft/basic/transports/stdio
…method name and arguments live where JSON-RPC puts them. There is no header layer. [meta-fields]: https://modelcontextprotocol.io/specification/draft/basic/index.md#meta ## Cancellation To cancel…
Streamable HTTP
Model Context Protocol · in the page
specification/draft/basic/transports/streamable-http
…Streamable HTTP transport: 1. Servers **MUST** validate the `Origin` header on all incoming connections to prevent DNS rebinding attacks. * If the `Origin` header is present and invalid, server…
Versioning and Compatibility
Model Context Protocol · in the page
specification/draft/basic/versioning
…) field. On HTTP, this is also carried in the [`MCP-Protocol-Version` header](https://modelcontextprotocol.io/specification/draft/basic/transports/streamable-http#protocol-version-header). If the ser…
Schema Reference
Model Context Protocol · in the page
specification/draft/schema
…nsport, this value MUST match the <code>MCP-Protocol-Version</code> header; otherwise the server MUST return a <code>400 Bad Request</code>. If the server does not support the requested version, i…
Discovery
Model Context Protocol · in the page
specification/draft/server/discover
…status codes returned for unknown methods, see the [Protocol Version Header](https://modelcontextprotocol.io/specification/draft/basic/transports/streamable-http.md#protocol-version-header) section i…
Tools
Model Context Protocol · in the page
specification/draft/server/tools
…(including with properties) * Properties **MAY** include an [`x-mcp-header`](#x-mcp-header) annotation to expose parameter values as HTTP headers * `outputSchema`: Optional JSON Schema defining…