One-time authority
Sensitive actions receive single-use authority bound to the exact tenant, action, destination and payload. Replays and mutations are rejected.
Privileged action security for autonomous AI
Sparse Guard keeps destination credentials out of agent runtimes, enforces policy and per-run budgets, executes approved actions itself, and produces signed evidence of what actually happened.
One-time authority
Per-run accountability
Credential custody
Signed evidence
AI agents can decide. Sparse Guard controls what they can actually do.
An identity provider can prove what permission was granted. Sparse Guard proves what was actually done, because Sparse Guard performs the protected action itself.
Before a sensitive action executes, Guard checks the governing policy, verifies the run budget, issues single-use authority bound to the exact action, destination and payload, uses the protected credential internally, executes the action, and records signed evidence.
Three controls on the execution path
Per-run accountability
Every protected run carries a budget ceiling, governing policy version, authority, execution result and signed evidence chain.
Credential custody
Reusable destination credentials stay outside the agent runtime. Customers can revoke, purge and crypto-shred credentials, with signed destruction evidence and multi-party break-glass recovery.
Sparse Guard does not replace your identity provider or policy engine.
It sits on the execution path and enforces the decision.
Identity systems tell Guard who is acting. Policy systems tell Guard whether the action is allowed. Sparse Guard makes the approved action happen exactly once and records the evidence.
From request to signed evidence
1
Agent requests a protected action
2
Sparse Guard checks identity context, policy and run budget
3
Guard issues one-time authority for the exact action
4
Guard executes using the protected credential
5
Guard returns signed evidence of what happened
Customer-controlled recovery
Break-glass is disabled by default and requires at least two authorised customer approvers. Sparse Guard never holds the customer's recovery private key. Recovery output is encrypted to the customer's key, the Guard-held credential is revoked automatically, and the event produces signed evidence.
Tamper-evident signed evidence
Signed execution evidence
Each protected execution can be verified after the fact.
Signed run manifests
Run chains bind authority, result and evidence in order.
Signed correction records
Annotations reference the original; they do not overwrite it.
Signed crypto-shredding evidence
Credential purge and DEK destroy produce a signed destruction record.
Build-once / promote-same-bytes
Production promotions reuse the already-qualified Worker artifact.
Cross-tenant isolation
Tenant data, keys and recovery requests stay bound to that tenant.
Single-use authority and replay protection
Reused or mutated authority is rejected.
Protect one real agent action
We are working with a small number of design partners to protect one consequential agent workflow end-to-end.