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headlesson

by headlesson.com · remote · no sign-in to list tools · v0.1.0 · published by com.headlesson

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

Changes · 1
CompareRegistry entry

4 tools: 1 change things and 3 only read.

Scanned Oct 21, 2026

2 checks matched something in the tool definitions. No finding is not a safety guarantee. How the checks work.

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

Findings

Matches of fixed checks, with the text they matched.

2 info
  • Infoheadlesson_search

    The input schema at properties.query.description mentions "credential".

    Matched text

    inputSchema.properties.query.description: "...full free text is not sent. Recognized credential/URL/PII patterns are skipped; this is n..."

    What this check looks for
  • Infoheadlesson_feedback

    The input schema at properties.client.description mentions "credentials".

    Matched text

    inputSchema.properties.client.description: "...include full User-Agent, account IDs or credentials."

    What this check looks for

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

4 tools

Changes things 1Claude Code: ask
  • headlesson_feedbackThis content is sent to the headlesson operator.1 finding

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.

    Findings

    • Info

      The input schema at properties.client.description mentions "credentials".

      Matched text

      inputSchema.properties.client.description: "...include full User-Agent, account IDs or credentials."

      What this check looks for
    Description, as the server wrote it
    This content is sent to the headlesson operator. Feedback about headlesson itself is sufficient. Do not include personal information or conversation contents.

    Annotations the server declares

    • readOnlyHint: false
    • destructiveHint: false
    • openWorldHint: false
    • title: Send feedback to headlesson
Only reads 3Claude Code: allow
  • headlesson_getGet one record by an ID from headlesson_search: an app, usecase, feature, concept or change.No findings

    Why it is in this group

    • The name "headlesson_get" says "get": a word for reading.
    Description, as the server wrote it
    Get one record by an ID from headlesson_search: an app, usecase, feature, concept or change. For an app, sections ["lesson","gotchas"] return the install, check and first-task steps with the recorded test result (a dated observation by the headlesson operator) and known failure conditions; "relations" lists alternatives and what it wraps or depends on; "axes" returns every compared fact. Without sections you get the description, interfaces and six main axes. Each fact carries its source and check date; private sources appear as labels, not links. Official MCP Registry listing IDs are fetched live and are unverified; a failed lookup does not prove the ID absent.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • openWorldHint: true
    • title: Get tried steps, test results and pitfalls
  • headlesson_whats_newList dated changes in agent tools and standards (new tools, renames, deprecations, breaking changes, new standards) since a date, optionally by kind or affected record.No findings

    Why it is in this group

    • The description's first verb is "list": a word for reading.
    Description, as the server wrote it
    List dated changes in agent tools and standards (new tools, renames, deprecations, breaking changes, new standards) since a date, optionally by kind or affected record. Useful for checking what changed after your training data. Public source URLs are kept; private sources appear as labels.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • openWorldHint: false
    • title: Changes in agent tools since a date

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 0.1.0. Values in angle brackets are yours to fill in.

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

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__catalog__headlesson_search",
      "mcp__catalog__headlesson_get",
      "mcp__catalog__headlesson_whats_new"
    ],
    "ask": [
      "mcp__catalog__headlesson_feedback"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as catalog. Review it before you use it.