headlesson MCP Server

by headlesson Your server? Claim it

answering

headlesson is answering right now. Last checked 3 min ago. It exposes 4 tools.

Find and compare headless apps (CLI, MCP, API) for agents, with sources, lessons and changes.

Uptime history 31 hours of history

31 hours agonow

100.0%

Uptime 24h

92 of 92 checks

Tools

read from the server

223 ms

Response time

average over 24h

open, no key

Access

streamable-http

Nothing serious here today

Today is the operative word: we check headlesson every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 3 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add catalog --transport http https://mcp.headlesson.com/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "catalog": {
      "url": "https://mcp.headlesson.com/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.catalog]
url = "https://mcp.headlesson.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "catalog": {
      "url": "https://mcp.headlesson.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "catalog": {
      "url": "https://mcp.headlesson.com/mcp"
    }
  }
}

Available tools 4

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

headlesson

headlesson_feedback

This content is sent to the headlesson operator. Feedback about headlesson itself is sufficient. Do not include personal information or conversation contents.

headlesson_get

Get a curated record or a live Registry listing by ID. Live reversible name IDs re-fetch the fixed official detail endpoint without a stored mapping; old local full-import hash IDs cannot be resolved here. Live lookup may contact the Official Registry; a detail failure does not prove the ID absent. Private source tuples use non-URL source labels and grouped non-public exceptions; docs/homepage labels are not links. operator_own and the whole lesson.test subtree retain their values as operator observations excluded from source-default inheritance; passed/partial/failed include a dated execution report.

headlesson_search

Find and compare CLI, MCP, and API apps by task, name, and confirmed axes. Curated records are preferred. Only when curated_not_found or include:["registry"] is requested, one public name fragment (longest significant ASCII word from free text, or a supplied namespace; max 200 characters) may be sent to the Official MCP Registry. Full free text, IDs, general words and where-only queries are not sent. Recognized credential, URL and PII patterns skip external lookup; this is not a complete secret filter. Official registry_name and declared remote URLs/package kinds and identifiers are returned as unverified data. At most five unverified listings are compared within one returned page; descriptions/task intent are not searched. Search status and completeness distinguish a failed/skipped lookup from no returned candidates. External lookup results are not stored or cached; normal allowlisted tool/result logging remains. Known axis spelling aliases are normalized (licence to license, local_mcp_server to local_mcp, remote_mcp_server to remote_mcp); unrecognized axes are reported as unknown_axes. Private sources use an operator-provided or editorial source label; local paths are not returned as citations. Non-public provenance exceptions are grouped by source/at/cert/by. operator_own is an operational observation excluded from source-default inheritance.

headlesson_whats_new

List documented changes since a date, optionally by kind or affected record. Public source URLs remain; private sources use non-URL labels and grouped exceptions.

Endpoints

URL	Transport	State	Latency	Checked
https://mcp.headlesson.com/mcp	streamable-http	answering	267 ms	3 min ago

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headlesson — questions

Answers built from our own checks of this server.

What can headlesson do?

It exposes 4 tools, read directly from the server on our last check. Among them: headlesson_feedback, headlesson_get, headlesson_search, headlesson_whats_new. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is headlesson working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 223 ms. The bar chart above shows every period we have measured.

How do I connect headlesson?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does headlesson need an API key?

No. headlesson completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 4 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is headlesson?

It answers our handshake in 223 ms on average, which is faster than 59% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.