Countersign

{
  "_meta": {
    "io.modelcontextprotocol.registry/official": {
      "status": "active",
      "isLatest": true,
      "updatedAt": "2026-08-23T01:38:36.991233Z",
      "publishedAt": "2026-08-23T01:38:36.991233Z",
      "statusChangedAt": "2026-08-23T01:38:36.991233Z"
    }
  },
  "server": {
    "name": "io.github.countersign-network/countersign",
    "_meta": {
      "io.modelcontextprotocol.registry/publisher-provided": {
        "tags": [
          "payments",
          "agent-payments",
          "security",
          "kill-switch",
          "spend-guard",
          "wallet",
          "ledger",
          "governance"
        ],
        "tools": [
          "countersign_request_spend",
          "countersign_freeze",
          "countersign_unfreeze",
          "countersign_apply_policy",
          "countersign_list_agents",
          "countersign_health",
          "countersign_list_approvals",
          "countersign_approve",
          "countersign_deny",
          "countersign_ledger",
          "countersign_guard_x402",
          "countersign_guard_ap2"
        ],
        "license": "Apache-2.0",
        "summary": "Countersign is a neutral, cross-vendor control plane for AI agents that spend money. It holds one policy, one sub-second freeze (kill switch), and one tamper-evident audit ledger across multiple agent-wallet and card backends at once. Remote mode: set COUNTERSIGN_URL + COUNTERSIGN_API_KEY against a hosted or self-hosted Core. Testnet only; Countersign never takes custody of funds.",
        "categories": [
          "finance",
          "security"
        ]
      }
    },
    "title": "Countersign",
    "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
    "version": "0.2.2",
    "packages": [
      {
        "version": "0.2.2",
        "transport": {
          "type": "stdio"
        },
        "identifier": "@countersign/mcp",
        "runtimeHint": "npx",
        "registryType": "npm",
        "registryBaseUrl": "https://registry.npmjs.org",
        "environmentVariables": [
          {
            "name": "COUNTERSIGN_URL",
            "format": "string",
            "default": "https://app.countersign.network",
            "isRequired": true,
            "description": "Base URL of the Countersign Core to govern (hosted or self-hosted)."
          },
          {
            "name": "COUNTERSIGN_API_KEY",
            "format": "string",
            "isSecret": true,
            "isRequired": true,
            "description": "API key for the Core (self-serve one at https://app.countersign.network/start or POST /signup)."
          }
        ]
      }
    ],
    "repository": {
      "url": "https://github.com/countersign-network/packages",
      "source": "github",
      "subfolder": "packages/mcp"
    },
    "websiteUrl": "https://countersign.network",
    "description": "Kill switch + spend guard for AI agents that spend money, across every wallet vendor at once."
  }
}