OpenAI builds and deploys advanced AI models like GPT-4o for autonomous agents and workflows.
Fullmakt
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About Fullmakt
Fullmakt acts as a credential broker for AI agents, issuing scoped, short-lived credentials on demand rather than exposing long-lived API keys. It verifies agent access on every request, enforces per-call policies, and maintains a tamper-proof audit log of all actions. The system sits between agents and APIs, injecting real credentials server-side only after policy approval and sanitizing sensitive data before responses reach the agent. It supports MCP servers and OAuth 2.1 workflows, allowing agents to inherit existing identity provider trust models while enforcing least-privilege access. Policies can be defined by endpoint, method, rate limits, or data class, with options to hold suspicious calls for human approval. The audit trail records every issuance, call, and revocation with cryptographic chaining to answer compliance or incident questions. Fullmakt is designed for teams deploying AI agents in production who need granular access control, verifiable behavior, and secret protection without building custom auth layers.
Key features
- Scoped credential minting for AI agents
- Per-request policy evaluation and enforcement
- Tamper-proof audit logging with cryptographic chaining
- MCP server and OAuth 2.1 native support
- Response sanitization and sensitive field masking
- Agent identity and policy compliance verification
- SSRF guards and hold-for-human-approval rules
- Server-side credential injection after policy approval
Use cases
- Govern AI agent access to production APIs without exposing long-lived keys
- Audit agent behavior for compliance or incident investigations
- Test agent API calls in sandbox before deployment
Pros
- Issues scoped, short-lived credentials expiring in one hour
- Per-request policy enforcement with SSRF guards and hold-for-approval rules
- Tamper-proof audit log of every agent call with cryptographic chaining
- Supports MCP servers and OAuth 2.1 with native integrations
- Sanitizes sensitive fields in responses and masks them in audit trails
Cons
- No free tier beyond sandbox testing
- Requires existing identity provider or secret store integration
- Usage-based pricing with no fixed plans or minimums
Frequently asked questions about Fullmakt
What is Fullmakt and what problem does it solve?
Fullmakt is a credential broker for AI agents that issues scoped, short-lived credentials on demand instead of exposing long-lived API keys. It verifies agent access on every request, enforces per-call policies, and maintains a tamper-proof audit log to ensure secrets never reach the model and every action remains attributable.
Who should use Fullmakt?
Fullmakt is designed for teams deploying AI agents in production who need granular access control, verifiable behavior, and secret protection without building custom authentication layers. It suits organizations managing non-human identities, MCP server security, or agent access control.
How does Fullmakt integrate with existing identity providers?
Fullmakt supports OAuth 2.1 workflows and MCP servers, allowing agents to inherit existing identity provider trust models while enforcing least-privilege access. It acts as a control plane between agents and APIs, injecting real credentials server-side only after policy approval.
Can Fullmakt test agent access before deployment?
Yes, Fullmakt includes an agent testing feature that simulates agent calls against APIs in a sandbox to confirm scopes, expirations, and downstream behavior before agents are deployed in production.
How does Fullmakt handle sensitive data in responses?
Fullmakt sanitizes sensitive data before responses reach the agent and masks sensitive fields in the audit trail. Real credentials are injected server-side only after policy approval, ensuring secrets never cross into the agent's context.
What kind of policies can be enforced with Fullmakt?
Policies can be defined by endpoint, method, rate limits, or data class, with options to hold suspicious calls for human approval. The system enforces least-privilege access by default and allows configuration per workflow to prevent unauthorized actions.
