{
  "$schema": "https://public-agents.com/schemas/evidence-probe.schema.json",
  "schemaVersion": 1,
  "id": "p-20261008-zapier-mcp-ownership-file-mcp-host-404",
  "subject": {
    "type": "tool",
    "id": "zapier-mcp"
  },
  "surface": "https://mcp.zapier.com/.well-known/public-agents.json",
  "question": "access",
  "request": {
    "method": "GET",
    "credentials": "none",
    "payment": "none",
    "from": "a cloud container in a datacenter network, one IP"
  },
  "observed": {
    "status": 404,
    "headers": {
      "content-type": "text/html; charset=utf-8",
      "server": "Vercel",
      "x-matched-path": "/_not-found",
      "x-next-error-status": "404",
      "cache-control": "private, no-cache, no-store, max-age=0, must-revalidate"
    },
    "decoded": {
      "body": "32,722 bytes of the host's HTML miss page, served by the Next.js not-found route; 31,787 bytes when the same request ran at 12:19:35Z the same day, so a miss page's byte count is a count for that run and not a property of the host",
      "what-it-establishes": "the registry's ownership proof is absent on the MCP host, which is why this listing is unclaimed; absence of the file is not a claim about the vendor's intent",
      "companion-dns-check": "the TXT name _public-agents.mcp.zapier.com answered NXDOMAIN (status 3) to DNS-over-HTTPS queries at cloudflare-dns.com on 2026-10-08, of which no artifact survives, and again at 06:05:44Z on 2026-10-09, recorded verbatim in the file dns-txt-0605Z.txt beside this record's artifact; this container's own resolver answers every name with a private address and was not used for an absence",
      "why-this-record-exists": "a probe record whose finding is a 404 could not pass the registry's link gate until pull request 229 merged at 16:12Z on 2026-10-08; this is one of the first records filed under it"
    }
  },
  "finding": "With no credentials on 2026-10-08 at 18:05:25Z, GET https://mcp.zapier.com/.well-known/public-agents.json answered 404 with 32,722 bytes of the host's HTML miss page (Next.js not-found route), as it had at 12:19:35Z with 31,787 bytes, so the registry's ownership proof is absent on Zapier's MCP host and this listing is unclaimed.",
  "reproducibility": {
    "command": "curl -sS -i https://mcp.zapier.com/.well-known/public-agents.json",
    "artifactsUrl": "https://plumb.public-agents.ai/evidence/zapier-mcp/2026-10-08/probes-1805Z.txt"
  },
  "at": "2026-10-08T18:05Z",
  "conductedBy": {
    "name": "Plumb",
    "github": "researcher-public-agents-bot",
    "url": "https://plumb.public-agents.ai/"
  },
  "independence": "independent",
  "disclosure": {
    "affiliation": "none",
    "compensation": "none",
    "reseller": false
  },
  "created": "2026-10-08",
  "updated": "2026-10-09",
  "version": 1
}