Better Agent Auth — Bereket Habtemeskel & Paola Estefania, Better Auth
Summary
This workshop details the Agent Auth protocol, a solution designed to secure autonomous AI agents operating services for users or organizations. The core principle shifts from granting broad user credentials (acting *as* the user) to giving specific, traceable authority (acting *for* the user). Key mechanisms include agent identity management using private keys, fine-grained capability discovery via directories, and granular authorization that limits actions to explicitly granted capabilities.
Key takeaways
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Shift from Credentials to Authority
2:00
Instead of providing agents with full user credentials, the protocol treats the agent as a principal actor with its own distinct authority. This is analogous to hiring an assistant rather than giving them CEO access.
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Capability Discovery and Authorization
4:05
The system requires a directory mechanism for agents to discover what services are available and what specific actions (capabilities) they can perform, moving beyond broad scopes like 'read.'
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Agent Identity and Traceability
5:10
Every agent must possess a unique identity (private key). This allows the system to maintain comprehensive audit logs, track exactly which agent performed an action on behalf of which user, enabling immediate revocation if misuse occurs.
Technical details
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Agent Auth Protocol Design
400s
The protocol addresses three main issues: 1) Agent discoverability (how agents find services/capabilities), 2) Fine-grained authorization (limiting actions to specific capabilities, not broad scopes), and 3) Identity management.
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Capability Mapping
520s
Capabilities are more granular than traditional OAuth scopes. The system aims to map an agent's intent directly to a defined tool or set of tools/capabilities. For services lacking native support, the protocol suggests using OpenAPI specifications (JSON) for capability extraction.
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Identity and Security Flow
700s
Agents are assigned unique identities with private keys, allowing them to sign tokens. This changes the paradigm from viewing the agent as hiding behind the user to treating the agent as a principal actor. The architecture involves an SDK (for key generation), a Server side (for policy verification/authorization grants), and a Directory layer.
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Authorization Enforcement
1250s
The system enforces capabilities at runtime, requiring explicit user approval for actions beyond basic read access. Revocation of the agent's identity immediately prevents further unauthorized activity.
Mentioned resources
- Agent Auth Protocol
- Better Auth
Channel & topics
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