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FACT (Federated Agent Certification Token) enables KYA (Know Your Agent) and agentic identity for AI agents. This documentation covers FACT credential specifications, CLI tools, and SDKs (TypeScript and Python) for agent identity verification and agent authentication.

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Get Started

What is FACT?

Learn about the problem FACT solves and how it works

Quickstart

Issue and verify your first credential in under 30 minutes

Core Concepts

VCs, DIDs, trust chains, and key terminology

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Tools & Guides

CLI Guide

Build fingerprints, sign credentials, and verify JWS tokens

TypeScript SDK

TypeScript SDK for validation, HTTP signatures, and key directories

Python SDK

Python SDK with full feature parity for validation, signing, and trust chains

Examples

Complete workflows and working code samples

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Reference

Specification

DeveloperCredential and AgentCredential v1 plus validation flows

JSON Schemas

Machine-readable schema definitions

Getting Started

Installation guides for CLI and SDKs

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About FACT

FACT provides verifiable credentials for agents, enabling:
  • KYA (Know Your Agent) - Identity verification for AI agents
  • Agentic Identity - Portable, verifiable identity layer
  • Agent Authentication - Cryptographic proof of agent identity via HTTP Message Signatures
  • Self-Signing - Developers can sign their own credentials
  • Trust Chains - Verify agent-to-developer relationships
Join us in building a safer agentic world - If you’re working on agentic systems or see the need for better agent identity, we’d love to hear from you. Share your use cases, feedback, or suggestions to help shape FACT. Contact team at beltic dot com or visit our Feedback page.