Documentation
Everything you need to integrate, understand, and extend SecureStamp.
Complete SSTP protocol endpoints: domain and email verification, trust scoring, stamp embed, webhooks, and more.
Technical specification and design rationale for the SecureStamp protocol: five-level trust model, notarial layer, E2EE, signals, scoring, and architecture.
How SecureStamp reaches L5 Certified: an ES256-signed notarial record of the message envelope plus business-identity (KYB) review. The five levels and the honest boundary: it certifies origin and integrity, not content truthfulness.
End-to-end encryption between verified identities (SSCM-1 suite: ECDH P-256 + HKDF-SHA256 + AES-256-GCM). Neither SecureStamp nor the mail providers can read message content.
Guide to joining the SecureStamp federated network: requirements, setup, configuration, and node operator obligations.
Formal SSTP protocol specification on GitHub: messages, cryptography, validation, and federation rules.
Quick start
The fastest way to verify a domain or email: a single GET request, no authentication required.
Try the verifiercurl -X POST https://securestamp.online/api/trust/check \
-H "Content-Type: application/json" \
-d '{"target":"example.com"}'