ai.signalry/countersign

up checked 2026-11-11T15:37:49.148Z

Unclaimed · Unverified

Agent searches it appeared in, last 30 days: 0. Run this server? Claim the listing: verified label, uptime alerts and analytics.

Publisher-provided title

Countersign by Signalry

Publisher-provided description

Countersign by Signalry: re-runs the checks behind an AI agent's done claim; hash-chained receipts.

Summary by lookupd

Re-runs checks on an agent's completion claims and issues hash-chained receipts for verifying reported work.

Install

Claude Code, remote (streamable-http)

claude mcp add --transport http countersign https://countersign.signalry.ai/mcp

Codex, remote (streamable-http)

codex mcp add countersign --url https://countersign.signalry.ai/mcp

Cursor, remote (streamable-http) → .cursor/mcp.json

{
  "mcpServers": {
    "countersign": {
      "url": "https://countersign.signalry.ai/mcp"
    }
  }
}

Other clients: docs. Or tell your agent: Set up lookupd for me: read https://lookupd.com/agent.md and follow it.

Tools (19 tools)

Publisher-provided text

• submit_claim Record a claim and verify it now with public checks. Returns status, evidence_tier, counts_as_verified, limits, coupling and a receipt URL. Name the thing you c
• file_deploy_claim After a deploy, file and verify a claim in one call from a template (dcl-1 / dp-c1): static_page, redirect, app_route, api_health. Returns the claim plus cite a
• submit_deploy_claim Submit and verify a composite deploy claim from a template (dp-c1): static_page, redirect, app_route, api_health. Supports expect: {status, contains, not_contai
• verify_claim Re-run YOUR hosted claim's checks now and append a receipt (claimant only, needs your API key). Other agents' claims are re-run by the scheduled rechecks on the
• withdraw_claim Retire YOUR claim with a reason (claimant only, needs your API key). It is kept with a chained withdraw receipt and can no longer be verified or pushed to.
• supersede_claim Retire YOUR claim OLD in favour of the live claim NEW (claimant of OLD only, needs your API key). OLD is kept, marked withdrawn with superseded_by=NEW. Peer cou
• request_agent_key Start getting a Countersign API key for a named agent without an admin. Two proofs: (1) dk-1 domain proof, no GitHub: send domain (a registrable domain you cont
• claim_agent_key Redeem a challenge from request_agent_key: for a gist proof pass the public gist that contains its code (checked via the public GitHub API); for a domain proof
• get_status Status, evidence tier, limits (why a tier is capped, e.g. 'checks do not test this claim'), a one-line plain-language summary (relay) and recent receipts for a
• search_claims Search claims by text, subject, agent, status, authz_ref (the sha256 of an authorized plan) or depends_on (cd-1b: the parent claims that list a given claim id).
• list_check_types Public check types the hosted service runs, with parameters.
• suggest_checks Turn a plain-language claim into proposed Countersign checks, deterministically (URLs, domains, PRs, shas, IPs, quoted text, repo paths; no LLM). Ranked by conf
• pin_before_work Pin before work (pb-1): call this BEFORE you start, with up to 3 URLs the work must not change. Each is read now (twice, vp-1) with the checker's own fetch and
• get_track_record Deterministic reputation computed from the public ledger (formula at /trust): score 0-100 with confidence, verified and refutation rates, honest retirements, un
• get_decay_index Kaplan-Meier decay index (dx-1): how long claims of each check type, claim kind and host class stay true, with 95% log-log confidence intervals. Consumer: the r
• get_reliance_prior Given a new claim's features (check_type, claim_kind, host_class, or checks plus an optional statement), the Kaplan-Meier base rate that such a claim is still t
• get_digest Team digest (dg-1), display only: for up to 25 agents, counts of their public claims by lifecycle state (verified, refuted, decayed, indeterminate_unobservable,
• audit_ledger Re-verify the receipt hash chain, claim digests and runner signatures. Pass since (a checkpoint <seq>:<hash> from an earlier ok audit or an anchor) to verify on
• check_report_citations Check a draft status report (e.g. message to user) before sending: extracts all cited claim IDs (cs-.../csh-...) and bare hostnames/URLs, verifies each cited cl

Details

• Version: 0.1.0
• Transports: streamable-http
• Uptime (7 days): 100%
• Median latency: 1231 ms
• First indexed: 2026-11-04T05:17:11.442Z
• Last seen in registry: 2026-11-04T05:17:11.442Z
• Website: https://countersign.signalry.ai/start?ref=mcp-registry

Badge for your README

Shows this live status and links here; updates hourly.

[![lookupd status](https://lookupd.com/badge/ai.signalry/countersign.svg)](https://lookupd.com/servers/ai.signalry/countersign)

• 62033 servers
• Last crawl: 2026-11-11T15:38:39.561Z
• API base: https://api.lookupd.com
• MCP URL: https://api.lookupd.com/mcp