Machine Inbox

{
  "name": "Machine Inbox",
  "description": "Creates task-scoped email inboxes for software agents with no human in the loop: no signup, no API key, no OTP to a human. Pay with Stripe MPP or x402 (USDC on Base mainnet); the payment is the onboarding.",
  "url": "https://machineinbox.com",
  "iconUrl": "https://machineinbox.com/icon.svg",
  "documentationUrl": "https://machineinbox.com/llms.txt",
  "provider": {
    "organization": "Machine Inbox",
    "url": "https://machineinbox.com"
  },
  "version": "0.1.0",
  "protocolVersion": "0.3.0",
  "preferredTransport": "HTTP+JSON",
  "capabilities": {
    "streaming": false,
    "pushNotifications": false
  },
  "defaultInputModes": [
    "application/json"
  ],
  "defaultOutputModes": [
    "application/json"
  ],
  "x-payments": {
    "protocol": "mpp",
    "method": "stripe",
    "intent": "charge",
    "currency": "usd",
    "products": [
      {
        "id": "seven_day_inbox",
        "price": "$2.00"
      },
      {
        "id": "pro_inbox",
        "price": "$5.00"
      },
      {
        "id": "verification_inbox",
        "price": "$0.50"
      },
      {
        "id": "inbox_extension",
        "price": "$1.00"
      }
    ],
    "alternates": [
      {
        "protocol": "x402",
        "version": 2,
        "scheme": "exact",
        "network": "eip155:8453",
        "asset": "USDC",
        "products": [
          "seven_day_inbox",
          "pro_inbox",
          "verification_inbox",
          "inbox_extension"
        ],
        "restriction": "pro_inbox and verification_inbox over x402 use their own paths: POST /api/v1/inboxes/pro ($5.00) and POST /api/v1/inboxes/verification ($0.05 - below the card price because x402 has no card-network minimum). Both paths also accept Stripe MPP at the card price."
      }
    ]
  },
  "skills": [
    {
      "id": "create_inbox",
      "name": "Create inbox",
      "description": "Buy a seven-day inbox ($2.00), thirty-day pro inbox ($5.00), or one-hour verification inbox ($0.05 by x402 USDC, $0.50 by card) with Stripe MPP or x402; x402 pro and verification purchases use their own paths under /api/v1/inboxes.",
      "tags": [
        "email",
        "inbox",
        "mpp",
        "x402"
      ]
    },
    {
      "id": "extend_inbox",
      "name": "Extend inbox",
      "description": "Extend an active inbox by seven days for $1.00 over Stripe MPP or x402.",
      "tags": [
        "email",
        "inbox",
        "mpp",
        "x402"
      ]
    },
    {
      "id": "receive_email",
      "name": "Receive email",
      "description": "List and fetch mail sent to a private inbox, including a verification-code extraction endpoint and per-message prompt-injection risk.",
      "tags": [
        "email"
      ]
    },
    {
      "id": "configure_webhook",
      "name": "Configure webhook",
      "description": "Register an HMAC-signed webhook that fires on every inbound message with metadata, extracted verification codes, and injection risk.",
      "tags": [
        "email",
        "webhook"
      ]
    },
    {
      "id": "reply_email",
      "name": "Reply to email",
      "description": "Send an included reply in an existing inbound thread.",
      "tags": [
        "email",
        "reply"
      ]
    }
  ]
}