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Which MCP servers are Third Hemisphere'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 2026-10-31

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Whose server it is
  • Registry nameagency.thirdhemisphere/ai-authority-indexverified in the MCP registry

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

When we asked itchecked 2026-10-31
  • Stateanswerschecked 2026-10-31
  • Tools7
  • Server calls itselfagency.thirdhemisphere/ai-authority-index
  • Server version1.0.0
  • Protocol version2025-06-18

On 2026-10-31 the server answered initialize and tools/list without a sign-in. First answer in 1060 ms.

Should an agent connect itNot proven either way yet
  • Whether its tools do the product's job has not been judged yet.
  • Checked on 3 of the 7 days it takes to judge reliability.

Once connected

  • Parameters are untyped or undescribed in 2 of 7 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: 3, the first on 2026-10-31
  • INITE MCP scoreafter a weeka score needs 7 daily checks: 3 so far
  • Answeredmeasuring3 of the 7 daily checks it takes to print a share
  • Median first answer1403 ms
  • Space in an agent's context≈ 814 tokensthe definitions of all its tools (7), which an agent carries on every turn
  • Tool definitionsA · 95 of 100
  • Typed results0 of 7 toolsdeclared outputSchema: results come typed, read once
  • Parameters without a description: in 2 of 7

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 offers7 tools · read 2026-10-31
  • list_index_editions

    Every published edition of Third Hemisphere's AI Authority Index, with its markets (sections), publication date, DOI where recorded, and links to its page, results, and open data. Read-only. Every result carries its citation and link.

  • get_edition_results

    The published results of one AI Authority Index edition section: each company's Star Chart cell, CRISP score where it has one, the five factor readings the edition prints, and how many AI answers named it. Read-only. Every result carries…

  • get_company_authority_score

    A company's published CRISP score and AI visibility reading in each market the AI Authority Index measures it in, with the month measured and its Standing Report link. Accepts a company name or slug. Read-only. Every result carries its…

  • get_company_score_history

    Every dated reading the AI Authority Index has published for a company, oldest first: its rows in each edition and each market's Standing Report. Read-only. Every result carries its citation and link.

  • search_companies

    Find companies with a Standing Report in Third Hemisphere's AI Authority Index by name. Read-only. Every result carries its citation and link.

  • list_markets

    Every market the AI Authority Index measures, with how many Standing Reports it has and when it was last measured. Read-only. Every result carries its citation and link.

  • get_market_standing

    The companies in one market with a Standing Report, most named in AI answers first. Read-only. Every result carries its citation and link.

How to connect

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

{
  "mcpServers": {
    "ai-authority-index": {
      "type": "http",
      "url": "https://thirdhemisphere.agency/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http thirdhemisphere https://thirdhemisphere.agency/mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://thirdhemisphere.agency/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.