MCP.Market

Countersignatory MCP server

online · 100% uptime
by countersignatory.com·com.countersignatory/mcp·v0.2.0
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Buy a verified human's approval, verification or judgment at a published price, paid by x402 or card

B79/100grade B
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Safety scan
B79/100

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Countersignatory tools (5, 2 write)

write = sends, deletes, buys or posts
  • countersignatory_get_orderwrite actionFree

    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, and who gave it and how they are disclosed. A consensus order returns each responder's answer and the majority.

  • countersignatory_place_orderwrite actionFree

    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 label applies). The order is priced at current spot and created unpaid; nothing is charged by this call. The response carries two ways to pay: an x402 pay_url that takes USDC on Base in an X-PAYMENT header, for an agent with a wallet, and a checkout_url a person can open to pay by card. Once paid it is answered by hand within the SLA, or refunded in full. Read the answer with countersignatory_get_order. The x402 flow is worked through step by step at https://countersignatory.com/llms.txt. Refused at intake: CAPTCHAs and bot checks, logging in or entering credentials, contacting third parties, medical, legal or financial advice, anything sexual or involving minors.

  • countersignatory_quoteFree

    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 indicative price, a band, what would clear at a lower bid, and the implied rate per human minute.

  • countersignatory_register_interestFree

    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 instead. This is the demand signal that decides which markets open first.

  • countersignatory_spot_indexFree

    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 table across all markets; use countersignatory_quote when you have a specific task and need a price for it.

Public scan report

scanner v0.1.10 · 2026-10-16 · same rubric, same numbers if you re-run it

1 high
  • –Code scanremote-only server, no package to scann/a
  • Live reliabilityremote reachable in 1004ms20/20
  • Tool poisoning5 tool descriptions checked15/15
  • Auth qualityopen endpoint exposes 2 write-action tools with no auth3/15
  • Maintenancelast push 40 days ago12/15
  • Maintainer identityregistry namespace matches repository owner; website matches verified namespace9/10

Findings (1)

  • highWrite-action tools reachable without authenticationauth.open-write
Overall 79/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How Countersignatory compares

Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
79/100
higher than 58% of 48,243 servers
Tools
5
the typical server has 7
Tools that change things
40%
typical: 0%. Fewer write tools means less an agent can break
Uptime
100%
of our recent checks; the typical remote server answers 100%
Response time
127 ms
faster than 79% of 30,027 servers

What its tools let an agent do: 3 read · 2 change

Release history: 2 versions in the registry since 2026-09-06, latest 2026-10-08, typically one every 32 days.

Install Countersignatory in Claude Code, Cursor or VS Code

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

What the publisher says

From the Countersignatory repository's README, as published. We do not edit it. Read it on GitHub

Countersignatory

The going rate for a human minute.

Countersignatory publishes the going rate for a human minute: a live spot index for verified human judgment, and a quote engine that prices a task before you commit to it. Four markets, ranked by what the responder has at stake: Check (one screened human, a quality score at stake), Consensus (several humans who must agree), Countersign (a named, register-verified professional who signs the record), and Seal (a regulated act such as remote notarisation). Quotes return an indicative price, a band, urgency and off-hours multipliers, alternatives that would clear a lower bid, and the implied rate per human minute. A published wage floor of $0.25 net per active minute is in force, responders are never charged, and every seeded number's derivation is public. The quote engine and index are live; the market itself opens after the current demand-measurement window. Keys are free, instant and unapproved.

MCP server

  • Endpoint: https://countersignatory.com/mcp
  • Transport: Streamable HTTP, stateless, no sessions
  • Auth: none required. An optional bearer key, free and instant from POST https://countersignatory.com/v1/keys, is recommended so a caller counts as one caller.

Tools

Three tools are served. The descriptions below are exactly what the endpoint returns from tools/list.

countersignatoryquote**

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 indicative price, a band, what would clear at a lower bid, and the implied rate per human minute.

Parameters: tasktype, slaseconds, tier, consensusn, unassisted, jurisdiction, maxprice.

countersignatoryregisterinterest

Record that the quoted price would clear your use case and you would buy at it. Takes the quoteid from a countersignatoryquote response. This is the demand signal that decides which markets open first.

Parameters: quoteid, wouldpay, note.

countersignatoryspotindex

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.

Example calls

# A free key, instant, no approval
curl -s -X POST https://countersignatory.com/v1/keys -H 'content-type: application/json' -d '{}'

# Price a three-human consensus judgment, needed within the hour, max bid $5
curl -s -X POST https://countersignatory.com/v1/quotes \
  -H 'content-type: application/json' \
  -d '{"task_type":"judgment","tier":"consensus","consensus_n":3,"sla_seconds":3600,"max_price":5}'

Methodology: https://countersignatory.com/methodology

Built by Countersignatory Ltd. The launch essay, "The going rate for a human minute," is at https://countersignatory.com/essay.

Nothing above is checked by us. What we check is on the safety report.

Grade history

  • 2026-10-16downgradeA → Bscore 79: Write-action tools reachable without authentication

Countersignatory: common questions

Is Countersignatory MCP server safe?
Mostly: it is graded B (79/100). Read the Countersignatory safety report
How do I install Countersignatory?
It runs remotely at countersignatory.com. Add it to Claude Code, Cursor, VS Code or Claude Desktop with the snippets above, or call it through the mcp.market gateway without installing anything.
Does Countersignatory need an API key?
Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is Countersignatory maintained?
The last commit was 61 days ago (2026-09-06). The latest release is v0.2.0.
Is Countersignatory up?
100% of our last 28 checks got an answer. We check remote servers about four times a day.
How does Countersignatory compare with other MCP servers?
safety score 79/100 (higher than 58% of 48,243 servers); tools 5 (the typical server has 7); tools that change things 40% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.