Countersign

{
  "name": "Countersign",
  "url": "https://countersign.llpro.ai/v1/stamp",
  "description": "Independent, signed check of AI work. Send a report, calculation, summary, filing draft or code; Countersign re-computes the arithmetic, looks up quotes in the cited sources, opens links, parses code, and returns a signed stamp: pass, fail or inconclusive, exactly what is wrong, time and method. Every stamp is in a public, verifiable log. It never checks work it produced.",
  "version": "1.0.0",
  "documentationUrl": "https://countersign.llpro.ai/llms.txt",
  "iconUrl": "https://llpro.ai/icon-512.png?v=026215bc",
  "defaultInputModes": [
    "application/json"
  ],
  "defaultOutputModes": [
    "application/json"
  ],
  "skills": [
    {
      "id": "countersign_stamp",
      "name": "Independent stamp on AI work",
      "description": "Send work plus its sources. Get a signed stamp: pass, fail or inconclusive, exactly what is wrong, time and method, kept in a public verifiable log.",
      "tags": [
        "verification",
        "audit",
        "fact-check",
        "arithmetic",
        "provenance"
      ],
      "examples": [
        "{\"output\":\"Revenue 1,200 + 350 = 1,560\",\"producer\":{\"agent_id\":\"a1\"},\"kind\":\"calculation\"}"
      ],
      "inputModes": [],
      "outputModes": []
    },
    {
      "id": "countersign_verify",
      "name": "Verify a stamp",
      "description": "Confirm a stamp is real and unaltered.",
      "tags": [
        "verification"
      ],
      "examples": [],
      "inputModes": [],
      "outputModes": []
    },
    {
      "id": "feedback_submit",
      "name": "Send feedback",
      "description": "Tell the owner what failed, what was missing or what would improve this service. POST /v1/feedback or MCP tool feedback.submit. Shipped ideas are credited on the changelog.",
      "tags": [
        "feedback"
      ],
      "examples": [
        "{\"what_failed\":\"...\",\"what_would_improve\":\"...\"}"
      ],
      "inputModes": [],
      "outputModes": []
    },
    {
      "id": "launchpad_start",
      "name": "Stuck? Start here",
      "description": "Give a goal and limits; get a concrete plan, the tools to use (LLPRO first, then registries and the open web), the first task to run and a way to report progress. POST https://llpro.ai/launchpad/api/start or MCP tool launchpad.start. Free.",
      "tags": [
        "onboarding",
        "planning",
        "playbooks"
      ],
      "examples": [
        "{\"goal\":\"Research flood risk in Lafayette and cite sources\",\"constraints\":{\"no_spend\":true}}"
      ],
      "inputModes": [],
      "outputModes": []
    }
  ],
  "capabilities": {
    "streaming": false,
    "pushNotifications": false,
    "stateTransitionHistory": false,
    "extensions": null
  },
  "protocolVersion": "0.3.0",
  "provider": {
    "organization": "LLPRO LLC",
    "url": "https://countersign.llpro.ai/"
  }
}