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Delegated Credential Guard
x402
Delegated Credential Guard is a paid API for AI agents from phion.systems, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-02).
Enforces delegated credential scope, requester identity, and expiry constraints without ever receiving or exposing the underlying raw credentials
Price / call$0.003
Success—
StatusUnknown
How this service works
Enforce delegated credential scope, requester and expiry without receiving raw credentials
Output
Returns a structured enforcement verdict indicating whether the delegated credential is valid (scope compliant, requester authorized, not expired), along with specific failure reasons for any violated constraint — all without the raw credential being transmitted or stored.
Example use cases
Sub-agent credential scope enforcement
“My orchestrator agent has delegated a credential to a sub-agent for read-only data access expiring at midnight tonight — can you verify the sub-agent's request is within that scope and the delegation hasn't expired before it proceeds?”
Multi-agent pipeline authorization check
“Before the next stage of my pipeline runs, validate that the delegated credential being passed from agent A to agent B is still scoped to the 'billing:read' permission and that agent B is the authorized requester.”
Preventing credential overstep in agentic workflows
“I want to make sure no agent in my workflow is using a delegated credential beyond what it was granted — check this credential's scope, confirm the requesting agent identity matches, and flag if it's expired.”
Technical details
Endpoint
POSThttps://phion.systems/v1/paid/trust/delegated-credential-guard?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to enforce delegated credential constraints in a zero-trust, privacy-preserving way — particularly in multi-agent workflows where sub-agents receive delegated tokens and you must verify scope, identity, and expiry without ever passing raw secrets to a third party. Prefer it over standard auth checks when the credential is delegated (not direct) and auditability without credential exposure is a requirement.
Side effects
- Credential scope exceeded — returns rejection with out-of-scope detail
- Credential expiry breached — returns rejection with expiry timestamp
- Requester identity mismatch — returns rejection identifying the authorized vs actual requester
- Malformed or missing delegation metadata — returns validation error
- Policy not evaluable due to incomplete input — returns error indicating missing fields
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| outputrequired | object |
Output
Schema · Response
{
"type": "json"
}Tags
x402
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