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Countersignatory MCP server

Which MCP servers are Countersignatory'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 2026-10-24

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Whose server it is
  • Registry namecom.countersignatory/mcpverified in the MCP registry

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

When we asked itchecked 2026-10-24
  • Stateanswerschecked 2026-10-24
  • Tools5
  • Server calls itselfcountersignatory
  • Server version0.4.0
  • Protocol version2025-06-18

On 2026-10-24 the server answered initialize and tools/list without a sign-in. First answer in 191 ms.

Should an agent connect itNot proven either way yet
  • Its tools do every use case we checked: Get a named human to check an agent's irreversible action; Obtain a qualified person's sign-off on regulated agent decisions; Route ambiguous agent cases to a screened human reviewer.
  • Checked on 3 of the 7 days it takes to judge reliability.

Once connected

  • For "Get a named human to check an agent's irreversible action", the likely first call is countersignatory_quote.
  • For "Obtain a qualified person's sign-off on regulated agent decisions", the likely first call is countersignatory_quote.
  • For "Route ambiguous agent cases to a screened human reviewer", the likely first call is countersignatory_quote.

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 2026-10-24
  • INITE MCP scoreafter a weeka score needs 7 daily checks: 3 so far
  • What an agent can do with it3 of 3 use cases
  • Answeredmeasuring3 of the 7 daily checks it takes to print a share
  • Median first answer220 ms
  • Space in an agent's context≈ 1,768 tokensthe definitions of all its tools (5), which an agent carries on every turn
  • Tool definitionsA · 97 of 100
  • Typed results0 of 5 toolsdeclared outputSchema: results come typed, read once
  • Parameters without a description: in 1 of 5

What an agent can do with it

  • can do · Get a named human to check an agent's irreversible action
  • can do · Obtain a qualified person's sign-off on regulated agent decisions
  • can do · Route ambiguous agent cases to a screened human reviewer

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 offers5 tools · read 2026-10-24
  • countersignatory_quote

    Get the current spot price to have a verified human check, agree on, sign off or notarise something. Use when an agent needs human judgment, accountability or a signature, and needs to know the cost and time before committing. Returns an…

  • countersignatory_register_interest

    Record that you would buy. Send the quote_id from a countersignatory_quote response to say the quoted price would clear your use case. For a market on the spot index whose state is opening, which cannot be quoted yet, send its market id…

  • countersignatory_spot_index

    The public Countersignatory Spot Index: the going rate for verified human judgment by market, with the urgency and off-hours multipliers, the published wage floor, and the derivation of every seeded number. Use it for the reference rate…

  • countersignatory_place_order

    Buy one task from a verified human in a market whose state is live on the spot index: an approval (should this action go ahead), a verification (does this page, document or screenshot show X), or a judgment (which is better, or which…

  • countersignatory_get_order

    Read one order by the id countersignatory_place_order returned: its status (awaiting_payment, paid, in_progress, answered, refused, refunded or expired), its price, how to pay while it is unpaid, and once answered the answer, the reason…

How to connect

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

{
  "mcpServers": {
    "countersignatory": {
      "type": "http",
      "url": "https://countersignatory.com/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http countersignatory https://countersignatory.com/mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://countersignatory.com/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.