Agent Skills vs MCP
Product engineer: Ship a skill to teach agents your workflow and an MCP server to let them act. Developer-platform lead: Skills are files; MCP needs hosting and auth. Agent builder: Load the skill, then call the tools it names. Agent Skills are SKILL.md instructions loaded by progressive disclosure.
The sourced difference
Agent Skills are SKILL.md instructions loaded by progressive disclosure; MCP servers expose callable tools. Vendors such as Stripe ship both and configure them together. (Agent Skills: agentskills.io, read 5 November 2026; MCP: modelcontextprotocol.io/specification/2026-07-28, read 5 November 2026; Stripe: Stripe MCP docs, read 5 November 2026)
Verdicts by reader
| Reader | Verdict |
|---|---|
| Product engineer | Ship a skill to teach agents your workflow and an MCP server to let them act. |
| Developer-platform lead | Skills are files; MCP needs hosting and auth. |
| Agent builder | Load the skill, then call the tools it names. |
Side by side
| Aspect | Agent Skills | MCP |
|---|---|---|
| Maintainer | agentskills.io open standard (originated at Anthropic) | MCP maintainers under the Agentic AI Foundation |
| What it is | A folder with a SKILL.md file (name, description, instructions) plus optional scripts, references and assets that agents load on demand. | A JSON-RPC 2.0 protocol between hosts, clients and servers; servers offer tools, resources and prompts, and clients may offer elicitation. |
| Status and version | Open format with a published specification at agentskills.io; adopted across many agent clients. | Current revision 2026-07-28 (released 28 Jul 2026); prior revision 2025-11-25. Registry in preview with API v0.1 frozen since 24 Oct 2025. |
| What it does not do | Does not execute anything by itself or expose remote tools; skills are instructions and files, often paired with an MCP server or CLI. | Does not grade servers, verify registry entries, or prescribe a .well-known discovery file in the 2026-07-28 core spec; server cards are still Working Group work. |
Read the full entries: Agent Skills and MCP.
Seen in the shared crawl
| Path | Top 10,000 found | Ora leaderboard found |
|---|---|---|
/.well-known/agent-skills/index.json | 53 of 7,435 (0.71%) | 144 of 3,364 (4.28%) |
A path counts only when the answer is the right kind of document. Many sites answer these paths with an ordinary web page, which is not counted. See the census.
| Path | Top 10,000 found | Ora leaderboard found |
|---|---|---|
/.well-known/mcp.json | 19 of 7,470 (0.25%) | 66 of 3,366 (1.96%) |