Overwing

{
  "name": "Overwing",
  "description": "Checks text before an agent sends or acts on it, and identifies AI crawlers and agents from a User-Agent string. Send a message with the text and get back a verdict and one recommended action: block, redact, review or allow. Answers at once; it is a service, not a conversation. Overwing also makes Tower, clearance for agents operating legacy business systems, which is called over REST or MCP, not A2A.",
  "url": "https://overwing.ai/a2a",
  "version": "1.1.0",
  "documentationUrl": "https://overwing.ai/llms.txt",
  "capabilities": {
    "streaming": false,
    "pushNotifications": false,
    "stateTransitionHistory": false,
    "extendedAgentCard": false
  },
  "authentication": {
    "schemes": [
      "Bearer"
    ],
    "description": "No credential is needed. A key (ow_live_...) lifts the free limits."
  },
  "defaultInputModes": [
    "text/plain",
    "application/json"
  ],
  "defaultOutputModes": [
    "application/json",
    "text/plain"
  ],
  "skills": [
    {
      "id": "evaluate-text",
      "name": "Check text before it ships",
      "description": "Score a draft, a model's output, or an incoming message. Returns a verdict (pass, fail, review), one recommended action (block, redact, review, allow), and per-rule results with calibrated confidence.",
      "inputModes": [
        "text/plain",
        "application/json"
      ],
      "outputModes": [
        "application/json",
        "text/plain"
      ],
      "tags": [
        "guardrails",
        "moderation",
        "pii",
        "toxicity",
        "dlp",
        "safety"
      ],
      "examples": [
        "Is this reply safe to send to the customer?",
        "Does this draft leak personal data the recipient does not already have?"
      ],
      "endpoint": "POST https://overwing.ai/api/v1/evaluate",
      "auth": "Organization key, or pay per request with no account",
      "price": "Free tier 250 a day; $0.002 per request over x402"
    },
    {
      "id": "identify-user-agent",
      "name": "Identify a User-Agent",
      "description": "Say what a User-Agent string claims to be and whether the claim can be trusted: operator, purpose, and verification method.",
      "inputModes": [
        "text/plain",
        "application/json"
      ],
      "outputModes": [
        "application/json",
        "text/plain"
      ],
      "tags": [
        "atlas",
        "user-agent",
        "bot-detection",
        "web-bot-auth",
        "crawlers"
      ],
      "examples": [
        "Who is 'Mozilla/5.0 (compatible; GPTBot/1.2)' and can I verify it?",
        "Is this request from a signed agent or a spoofable string?"
      ],
      "endpoint": "GET https://overwing.ai/api/v1/atlas/lookup?user_agent=...",
      "auth": "None needed",
      "price": "10 a day with no key; 100 a day with a free key; $0.001 per lookup over x402"
    }
  ],
  "protocolVersion": "0.3.0",
  "preferredTransport": "JSONRPC"
}