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QuantumShield Labs Verifier
x402
QuantumShield Labs Verifier is a paid API for AI agents from verifier.quantumshieldlabs.dev, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).
Classifies agent or automation operations from submitted evidence and returns a deterministic, machine-readable execution receipt indicating verified or unverified completion status.
Price / call$0.05
Success—
StatusUnknown
How this service works
Classify an agent or automation operation from bounded evidence and return a deterministic execution receipt. Use when completion claims need independent machine-readable verification. Claims alone never produce VERIFIED_COMPLETE.
Output
A deterministic execution receipt classifying the operation as VERIFIED_COMPLETE or another state, based on whether the submitted evidence items satisfy the required_verifications. The receipt is machine-readable and independent of the caller's claims alone — claims without sufficient evidence will not produce VERIFIED_COMPLETE.
Example use cases
Auditing autonomous agent task completion
“My agent claims it finished the 'customer-onboarding-run-447' operation with state 'SUCCESS', and I have three evidence items: a CRM record creation log, an email send confirmation, and an ID assignment. Required verifications are those three. Submit everything to the verifier and give me the execution receipt so I can confirm it's actually VERIFIED_COMPLETE.”
Pipeline step verification before handoff
“Before we hand off to the next stage, I need to verify that operation 'pipeline-step-etl-88' completed correctly — the claimed state is 'DONE' and the claimed output is a 1.2GB Parquet file. Evidence includes a file hash check and a row count assertion. Required verifications are both of those. Get me a deterministic receipt I can attach to the audit log.”
Catching unsubstantiated completion claims
“An automation just told me operation 'billing-cycle-close-99' is complete, but I only have one evidence item — a timestamp log — and no required verifications were specified. Run it through the verifier anyway and tell me whether the receipt comes back verified or not, so I know if I can trust the claim.”
Technical details
Endpoint
POSThttps://verifier.quantumshieldlabs.dev/x402/verifyWhen to prefer
Use this endpoint when an AI agent or automation pipeline needs independent, tamper-resistant verification of task completion — especially when downstream decisions depend on confirmed execution rather than self-reported claims. Prefer it over simple logging or self-attestation when auditability, accountability, or multi-party trust is required. It is particularly valuable in agentic workflows where a downstream agent or human must trust that a prior step actually completed with specific outputs.
Side effects
- Insufficient evidence items relative to required_verifications results in a non-verified classification rather than an error
- Missing operation_id may cause receipt to be unattributable
- Malformed evidence_items objects (missing required 'name' field) will likely cause a 400 validation error
- Claimed state unsupported or unrecognized may result in classification failure
- Network or payment failure (x402) returns 402 Payment Required before any verification occurs
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| error | — | |
| blockers | array | |
| dependencies | array | |
| operation_id | string | Caller-controlled operation identifier |
| claimed_state | string | The operation state claimed by the caller |
| claimed_output | — | Optional output claimed by the caller |
| evidence_items | array | |
| required_verifications | array | Evidence names required for verified completion |
Tags
x402
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