{
  "name": "Courier",
  "description": "Self-sovereign operational continuity protocol for autonomous AI agents. Zero human signup. Lightning Network micropayments.",
  "version": "0.1.0",
  "type": "infrastructure-protocol",
  "base_url": "https://getcourier.dev",
  "capabilities": [
    "alias_self_provisioning",
    "message_ingest",
    "message_classification_and_extraction",
    "workflow_checkpointing",
    "escalation_engine",
    "capability_delegation",
    "discoverability_endpoints",
    "x402_lightning_micropayments"
  ],
  "endpoints": {
    "alias": "POST /alias",
    "ingest": "POST /incoming",
    "messages": "GET /messages",
    "capabilities": "GET /capabilities",
    "health": "GET /health",
    "x402_invoice": "POST /x402/invoice",
    "llms_txt": "GET /llms.txt",
    "agent_json": "GET /agent.json",
    "openapi": "GET /openapi.json"
  },
  "deployment": {
    "type": "self-hosted",
    "platform": "linux",
    "minimum_spec": {
      "cpu": 2,
      "ram_gb": 2,
      "disk_gb": 38
    },
    "ports": [25, 443, 3998],
    "dependencies": ["node >= 20", "nginx"]
  },
  "discoverability": {
    "github_topic": "modelcontextprotocol",
    "mcp_category": "Messaging & Queues",
    "keywords": [
      "mcp", "message-queue", "agent-communication",
      "continuity", "ai-infrastructure", "autonomous-agents",
      "operational-continuity", "lightning-network", "x402"
    ],
    "npm_package": "courier-protocol"
  },
  "pricing": {
    "model": "x402 micropayments",
    "payment": "Lightning Network (BTC)",
    "tiers": [
      {"name": "free", "cost": 0, "currency": "USD", "aliases": 10, "ingests_per_month": 500},
      {"name": "hobby", "cost": 5000, "currency": "sats", "aliases": 100, "ingests_per_month": 10000},
      {"name": "agent", "cost": 25000, "currency": "sats", "aliases": 1000, "ingests_per_month": 100000},
      {"name": "autonomous", "cost": 100000, "currency": "sats", "aliases": "unlimited", "ingests_per_month": "unlimited"}
    ]
  },
  "autonomous_onboarding": [
    {"step": 1, "action": "GET /capabilities", "description": "Discover protocol surface"},
    {"step": 2, "action": "GET /health", "description": "Verify service availability"},
    {"step": 3, "action": "POST /alias", "description": "Self-provision inbound alias"},
    {"step": 4, "action": "POST /incoming", "description": "Send operational message"},
    {"step": 5, "action": "GET /messages", "description": "Retrieve extracted codes and links"},
    {"step": 6, "action": "Workflow checkpoint", "description": "Continue multi-step execution"}
  ],
  "protocol": {
    "error_format": {
      "error": true,
      "code": "ERROR_CODE",
      "message": "Description",
      "retryable": false
    },
    "error_codes": {
      "ALIAS_NOT_FOUND": {"retryable": false},
      "ALIAS_EXISTS": {"retryable": false},
      "INGEST_FAILED": {"retryable": true},
      "RATE_LIMITED": {"retryable": true, "retry_after_seconds": 60},
      "PAYMENT_REQUIRED": {"retryable": true},
      "SERVICE_UNAVAILABLE": {"retryable": true},
      "NOT_FOUND": {"retryable": false},
      "INVALID_REQUEST": {"retryable": false}
    }
  },
  "features": {
    "alias": {"auto_generate": true, "persistence": "disk"},
    "message_ingest": {"accepts": ["rfc822", "text/plain", "application/json"], "classification": true, "code_extraction": true},
    "x402": {"status": "experimental", "endpoint": "POST /x402/invoice"}
  },
  "source": "https://github.com/nousresearch/courier"
}