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Authority MCP server

Which MCP servers are Authority's own, from the official registry and from asking its own domain, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-19

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Whose server it is
  • Registry namemd.authority/authority-mdverified in the MCP registry

The registry name sits under authority.md. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-19
  • Stateanswerschecked 2026-10-19
  • Tools4
  • Server calls itselfauthority.md
  • Server version1.0.0
  • Protocol version2025-06-18

On 2026-10-19 the server answered initialize and tools/list without a sign-in. First answer in 97 ms.

Should an agent connect itSkip it
  • Its tools do none of the product's use cases we checked: evaluate a long-term investment with a value-investing lens; weigh capital allocation decisions.

Once connected

  • Parameters are untyped or undescribed in 2 of 4 tools: check arguments before calling.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

Measured dailydaily checks: 16, the first on 2026-10-19
  • INITE MCP score67 of 100answers 100 · does the job 0 · definitions 75 · context 100 · connects 100
  • What an agent can do with it0 of 2 use cases
  • Answered100% of days16 of 16 daily checks
  • Median first answer300 ms
  • Space in an agent's context≈ 830 tokensthe definitions of all its tools (4), which an agent carries on every turn
  • Tool definitionsB · 75 of 100
  • Typed results0 of 4 toolsdeclared outputSchema: results come typed, read once
  • Parameters without a description: in 2 of 4
  • Not saying whether it only reads or can destroy: 4 of 4

What an agent can do with it

  • cannot · evaluate a long-term investment with a value-investing lens
  • cannot · weigh capital allocation decisions
  • not sure · apply a named thinker's decision heuristics to a live decision

Each of the product's use cases, put to Jev against this server's tool list: can an agent do it with these tools?

Worth a look

None of the five warning signs in these definitions.

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (25%), doing the product's job (25%), definitions (20%), context (10%), use (10%) and how readily a client connects (10%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

Tools it offers4 tools · read 2026-10-19
  • search_personas

    Search the authority.md marketplace. It carries four product types: persona thinking frameworks (e.g. Warren Buffett), hand-built functional Tools (e.g. Strategic Email — procedures for recurring tasks such as difficult emails, hiring…

  • get_persona_details

    Get the full details for a specific product on authority.md — a persona framework, a functional Tool, a Playbook, or a curated Bundle. Use after search_personas to show complete information before purchase. Returns metadata, a 'type'…

  • list_categories

    List all categories of thinkers available on authority.md. Use when the user wants to browse by domain (Investor, Tech Visionary, Philosopher, etc.) rather than search by name.

  • purchase_persona

    Generate a checkout URL on authority.md for purchasing one or more frameworks, Tools, Playbooks, or Bundles. Accepts 1-50 slugs (personas, Tools, and/or Playbooks, mixed carts allowed). To purchase a Bundle, pass all 10 of its persona…

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

{
  "mcpServers": {
    "authority-md": {
      "type": "http",
      "url": "https://authority.md/api/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http authority https://authority.md/api/mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://authority.md/api/mcp as a custom connector in the settings.

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.