mcp-specification-referencelisted

Use when the user asks about "MCP protocol version", "MCP spec", "protocol negotiation", "MCP capabilities", "MCP transport", "MCP lifecycle", "MCP schema", "initialize handshake", or needs to verify MCP server conformance, understand version differences, check required methods, or look up MCP protocol behavior. Also applies when building or debugging MCP servers and needing authoritative spec details.
amarbel-llc/purse-first · ★ 1 · AI & Automation · score 70

Install: claude install-skill amarbel-llc/purse-first

# MCP Specification Reference ## Overview The Model Context Protocol (MCP) is an open protocol for connecting AI applications to external tools, data sources, and services. This skill provides quick access to the official spec across all released versions and a guide to navigating the reference documents. ## Spec Versions | Version | Status | Key Changes | |---------|--------|-------------| | `2024-11-05` | Legacy | Original spec: tools, resources, prompts, sampling, roots, stdio + HTTP/SSE transports | | `2025-03-26` | Stable | OAuth 2.1 authorization, streamable HTTP transport (replaces SSE), JSON-RPC batching, tool annotations, audio content, completions capability | | `2025-06-18` | Released | Elicitation, structured tool output, resource links, security best practices, `MCP-Protocol-Version` header, removed JSON-RPC batching | | `2025-11-25` | Latest | Tasks (experimental), URL-mode elicitation, tool calling in sampling, icons on tools/resources/prompts, OAuth enhancements, JSON Schema 2020-12 default | | `draft` | Draft | Working draft for next release | For the official versioning policy, see `references/versioning.mdx`. ## Capability Matrix Capabilities declared during the initialize handshake. Rows show when each was introduced: | Capability | 2024-11-05 | 2025-03-26 | 2025-06-18 | 2025-11-25 | |------------|:---:|:---:|:---:|:---:| | **Server: tools** | Yes | Yes | Yes | Yes | | **Server: resources** | Yes | Yes | Yes | Yes | | **Server: prompts** | Yes | Ye