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Portable Observability Audit
x402
Portable Observability Audit is a paid API for AI agents from phion.systems, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-14).
Validates and cryptographically signs a portable event hash chain to establish tamper-evident audit trails for agent activity
Price / call$0.004
Success—
StatusUnknown
How this service works
Validate and sign a portable event hash chain
Output
Returns a validation result confirming the hash chain's integrity along with a cryptographic signature attesting to its authenticity, forming a portable, tamper-evident audit certificate that can be shared or archived.
Example use cases
Compliance audit trail for agent fleet
“I need to validate and cryptographically sign the portable hash chain from last night's agent batch run so our compliance team has an auditable, tamper-evident record of everything that happened.”
Cross-system agent handoff verification
“Before we hand off to the next agent, can you sign and validate the current event hash chain so the receiving system can verify nothing was altered during transit?”
Third-party trust attestation
“We're sharing our agent's observability log with a partner — can you validate and sign the hash chain so they can independently verify the integrity of the event sequence?”
Technical details
Endpoint
POSThttps://phion.systems/v1/paid/trust/portable-observability-auditWhen to prefer
Choose this endpoint when you need cryptographic assurance that a sequence of agent events has not been altered — especially for compliance, cross-system handoffs, or sharing observability data with third parties who need independent verification. It complements phion.systems' broader agent trust suite (task handoff receipts, context provenance labeling) and is best suited when portability and signed attestation are requirements, not just logging.
Side effects
- Invalid or malformed hash chain input returns a validation failure with details on the inconsistency
- Hash chain with detected gaps or tampering is rejected with an integrity violation error
- Missing required fields in the event payload result in a schema validation error
- Network or signing service unavailability returns a 5xx error
- Malformed JSON input returns a 400 bad request
Input
Schema · Request body
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"type": "object"
}Tags
x402
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