Example servers, SDKs, and hosts that serve or consume skills over MCP. Official client support is tracked on the extension client matrix; this list is broader and community-maintained.
Status: v1 implements the released extension · partial implements some of it · pre-v1 targets an earlier draft · prototype fork or demo · in progress open PR · planned issue only. A link after the status points to the issue or PR tracking the work.
Category: official maintained by the MCP project · community individual or community project · unmarked rows are maintained by the organization behind the product
Implementations that predate the SEP are recorded in the archived related work and are not repeated here.
To add or update a row, open a PR. Keep notes to one line.
| Implementation | Category | Language | Status | Notes |
|---|---|---|---|---|
| Go SDK | official |
Go | in progress (#1238) |
Passes the conformance suite; filesystem provider in #1240 |
| TypeScript SDK | official |
TypeScript | in progress (#2818) |
Phase 1: schemas, client ops, server handlers. Tracking issue #2798 |
| Python SDK | official |
Python | in progress (#3485) |
Tracking issue #3486 |
| C# SDK | official |
C# | in progress (#1864) |
Alternative PR #1856; maintainers to pick |
| FastMCP SkillsProvider | Python | pre-v1 (#129) |
Own skill:// shape |
|
| mcpkit | community |
Go | partial (#780) |
Server and host. v1 security rules; catalog still on the index-resource shape |
| Tachyon | Java | v1 |
Self-reported 2026-09-14; requires clients to advertise the extension capability |
| Implementation | Category | Language | Status | Notes |
|---|---|---|---|---|
| hf-mcp-server | TypeScript | v1 |
Hugging Face. skills/list, skills/get, directoryRead. HTTP transports only |
|
| github-stars-contrib-mcp-server | community |
Python | v1 (#144) |
Passes the conformance suite server scenarios |
| github-mcp-server | Go | prototype |
Demo branch, not for merge |
| Implementation | Category | Status | Notes |
|---|---|---|---|
| fast-agent | community |
partial |
First client interoperated end-to-end with hf-mcp-server |
| MCP Inspector | official |
partial |
SEP-2640 support since 2.6.0 (2026-09-09), including CLI skill verification |
| MCPJam Inspector | partial |
Skills surface in the app and CLI; declares the extension capability | |
| ChatGPT plugins | partial |
Imports skills at plugin submission, static snapshot | |
| VS Code fork | community |
prototype |
skills/list discovery and loading (findings) |
| Goose | planned (#12068) |
Prototype fork in ext-skills#125 | |
| mcpkit host | community |
partial |
load_skill tool, verified reads, per-origin resolution |
| agent-harness | community |
planned (#492) |
Digest-pinned skill store |