PTERI Documentation
Cryptographic proof of authority — instead of shared-secret trust.
The internet was designed to move information, not value, and not identity. Identity was bolted on later through passwords, SMS codes, and centralized databases — mechanisms that represent what someone knows, never who someone is.
If a secret can be typed, it can be phished. If it can be stored, it can be breached. If it can be forwarded, it can be replayed.
PTERI replaces shared-secret trust with cryptographic proof of authority, for humans and AI agents alike.

Start here
| If you want to… | Go to |
|---|---|
| Understand the problem PTERI solves | Foundations |
| See what the platform can do | Platform Capabilities |
| Grasp the core mental model | The PTERI Model |
| Call the API | API Reference |
| Integrate with an SDK | SDKs & Integration |
| Secure AI agents with MCP | AI Agents & MCP |
| See pricing and get access | Product & Access |
How these docs are organized
Concepts — Foundations, The PTERI Model, and Comparisons explain why PTERI works the way it does.
Build — Platform Capabilities, API Reference, SDKs & Integration, and AI Agents & MCP cover how to build on it.
Trust — Architecture & Security, Payments & Identity, Threat Model & Cryptography, and Operations & Scaling document what guarantees you get and how the system behaves at scale.
Product — Use Cases and Product & Access cover what you can build and how to get started.