Documentation

Every guide for the proof.holdings API, SDKs and MCP server — start with the mental model, then the reference.

Start here

Core Primitives
The mental model in one page
API Reference
Complete API documentation
SDKs
Official client libraries
Smart Reuse
Skip re-verification with existing proofs
Multi-Profile System
Multiple public profiles per account
Message Templates
Custom branding and message templates per project
Comparison
vs SMS OTP, TOTP, WebAuthn
Pricing
Plans and pricing tiers
Security
Threat model and guarantees
MCP Server
167 tools for AI agents
Integrations
n8n, Zapier, Make, and custom integrations
Proof of Me
Anti-impersonation reverse verification via trusted Circle members
Proof of Delegation
A proven domain authorizing an artifact, and how to verify or withdraw it