Physical mailing address and postal mail API for AI agents
Stage
MVP
Not given
Founded
Not given
Not given
Based in
ZA
US
Pricing model
Free
Freemium
Pricing
Not given
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
Key features
Agent SEAL with bronze, silver and gold levels
Service SEAL for tracking service behavior and terms
Open-source CLI for agent integration
Public ledger of checked agents and services
Cryptographic signatures for offline verification
Trust Score tracking from 0 to 200
Domain verification by DNS for silver SEALs
Verified task checking without calling tools or paying
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
What makes it different
Cryptographic identity and offline-verifiable SEALs for agents
No fees or sign-up required to get listed and checked
Checks services without paying or calling tools
Public ledger and leaderboards for transparency
Open source CLI for developer integration
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
SealKeeper
mailbox.bot