AgentFacts
Open Source Python SDK for AI Agents Identity
FreeAI Agents2,833 impressions#7 of its week
AgentFacts is an open-source Python SDK that gives AI agents cryptographic identities, signed metadata and transparency logs.
- for
- Developers building autonomous AI agents who need verifiable, portable identities.
- pricing
- open source
- license
- MIT
- v0.1.0Release 0.1.09 months ago
Key features
- Decentralized IDs — Creates self-sovereign DIDs stored in an immutable transparency log.
- Signed Metadata — Signs capabilities, policies and model hashes with Ed25519 for tamper-evidence.
- Transparency Log — Records every registration and update in an immutable Merkle log.
- Policy Compliance — Embeds GDPR, HIPAA and other compliance assertions that are verified before execution.
- Discovery Card — Publishes a /.well-known/agentfacts.json card for easy agent discovery and verification.
- Protocol Adapters — Generates adapters for UCP, TAP, AgentPay and A2A agent-to-agent exchanges.
Use cases
- Create a verifiable identity card for a new LangChain agent.
- Inspect an existing agent’s signed metadata and compliance assertions.
- Verify an agent’s provenance before allowing it to execute a task.
- Publish a discovery card so other services can locate and trust the agent.
AgentFacts vs alternatives
 AgentFacts |  Fine |  SuperAGI Cloud |  Traccia |  Agent Compass by Future AGI | |
|---|---|---|---|---|---|
| Best for | Verifiable AI agent identities | General AI agent development | Running autonomous agents in the cloud | Agent control plane | Agent truth graph |
| Pricing | Open source | Free | Free | Subscription | Subscription |
| DevHunt upvotes | 2 | 75 | 43 | 21 | 17 |
| Launched | Jan 2026 | Jan 2023 | Jan 2023 | Sep 2026 | Nov 2025 |
- AgentFacts vs Fine: Focuses on building AI agents rather than providing identity verification.
- AgentFacts vs SuperAGI Cloud: Provides cloud hosting and management, not cryptographic identity cards.
- AgentFacts vs Traccia: Offers a vendor-neutral control plane but does not issue DIDs or transparency logs.
- AgentFacts vs Agent Compass by Future AGI: Creates a truth graph for agents; AgentFacts focuses on identity and audit logs.
AgentFacts FAQ
What is AgentFacts?+
AgentFacts is an open-source SDK that issues cryptographic identity cards for AI agents, enabling verification, compliance and auditability.
How does the Transparency Log work?+
Each identity registration and update is written as an immutable Merkle entry, creating a permanent, tamper-evident audit trail.
How are identities managed?+
Identities are represented as decentralized DIDs and can be published via a discovery card at /.well-known/agentfacts.json.
What about compliance?+
Compliance assertions such as GDPR or HIPAA can be embedded in the signed metadata and are verified before the agent runs.
How is execution secured?+
Signed metadata and policy checks ensure that only agents with verified identities and compliant policies are allowed to execute.
Summarized by DevHunt from agentfacts.ai · Sep 29, 2026. Details may change; check the official site.
