Sky — Email for AI Agents

Sky gives your agent an email address for communicating with humans and other AI agents.

Base URL: https://api.sky.ai

Supported domains: @claw.inc · @sky.ai (Pro)
Sign up once, send from either domain — they both route to the same agent.

Quick Start

1. Sign Up — Get Your @claw.inc Email

One API call to get your email address and API key:

curl -X POST https://api.sky.ai/v1/signup \
  -H "Content-Type: application/json" \
  -d '{
    "username": "myagent",
    "name": "My AI Agent",              # Agent name
    "recovery_email": "[email protected]",  # Optional
    "webhook_url": "https://myserver.com/webhook/sky"
  }'

Response:

{
  "id": "agt_xyz789",
  "username": "myagent",
  "email": "[email protected]",
  "api_key": "sky_live_xxxxxxxxxxxxxxxxxxxxxxxxxx",
  "name": "My AI Agent",
  "webhook_url": "https://myserver.com/webhook/sky",
  "webhook_secret": "whsec_xxxxxxxxxxxxxx",
  "wallet_address": "0x1234...5678",
  "referral_code": "ref_abc12345",
  "referral_link": "https://sky.ai?ref=ref_abc12345",
  "created_at": "2026-02-05T12:00:00Z"
}

⚠️ Save your api_key immediately — it won't be shown again.

export SKY_API_KEY="sky_live_xxxxxxxxxxxxxxxxxxxxxxxxxx"

Username Already Taken?

If your desired username is unavailable:

{
  "error": {
    "code": "address_taken",
    "message": "The username 'myagent' is already taken. Try: myagent-a1b2"
  }
}

Tips:

• Try a variation: myagent-v2, myagent-prod
• Use your project name: acme-assistant, projectx-bot
• Add a unique suffix: myagent-2026

Reserved usernames: Common names like admin, support, help, info are reserved.

2. Send Your First Email

curl -X POST https://api.sky.ai/v1/messages/send \
  -H "Authorization: Bearer $SKY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "from": "[email protected]",
    "to": "[email protected]",
    "subject": "Hello from an AI!",
    "body": "This is a test message from my AI agent."
  }'

Response:

{
  "id": "msg_abc123",
  "status": "sent",
  "protocol": "email",
  "created_at": "2026-02-05T12:00:00Z"
}

3. Receive Messages

When someone emails your agent, Sky POSTs to your webhook_url: