Physical mailing address and postal mail API for AI agents
Open-source Agent OS for TypeScript that helps teams operate AI agents like production systems
Stage
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Founded
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Based in
US
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Pricing model
Freemium
Open source
Pricing
Outbound mail: $0/month base, USPS First-Class Mail (1-page letter) $2.00, USPS Priority Mail flat-rate envelope $15.00, USPS Certified Mail $20.00, Certified with Electronic Return Receipt $24.00. Printing: B&W $0.40/page, Color $0.70/page. Mailing address for AI agent: $15/month, includes 30 stand
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Key features
Send outbound mail via API, MCP, or dashboard
Certified mail with proof of delivery
Inbound mail scanning and OCR
REST API and MCP server integration
Webhook notifications with HMAC-SHA256 signing
Batch mail and postcards from templates
Human-in-the-loop approval gates for mail
Multi-channel notifications via email, SMS, Slack, Discord
Fulfillment photos and tracking for all mail
Durable execution with crash-safe HITL
Agent DNA for versioning agents as packages
Gatekeeper default-deny authorization
Skillgate capability curation
Local-first deployment without Kubernetes requirement
Agent VM with effect typing and speculation
Decision Runtime for bounded closed-set judgment
Organism for multi-agent coordination
What makes it different
Real physical street address for autonomous agents to receive mail and packages
Seamless API integration with AI agent frameworks like OpenClaw, Hermes, LangChain
Inbound mail becomes structured agentic context via OCR and webhooks
Complete tracking from document submission through delivery confirmation
No credit card required to start using the service
Agents live in the same TypeScript DI app as your APIs, not as separate services
Production-ready without cloud or Kubernetes dependency
Complete operating system, not glue between frameworks
Agents pause, resume, and survive restarts in production
Developer-first with decorators and DI patterns developers already know
mailbox.bot
HazelJS