Return an advisory ALLOW, DENY, or ESCALATE decision by comparing a bounded acti
Return an advisory ALLOW, DENY, or ESCALATE decision by comparing a bounded action request with authority, constraints, and evidence supplied by the caller. The service does not execute or legally authorize the action, access a wallet, validate identity, or independently observe facts.
Not tested: has real-world effectsour last check, 2026-09-26
0 of 0checks answered this week
n/amedian answer time
$0.005listed price per call
n/aprice it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://verifier.quantumshieldlabs.dev/x402/preflight
| Category | Code and developer |
|---|---|
| Provider host | verifier.quantumshieldlabs.dev |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
We never call tools that send, buy, move money or file anything, not even without paying.
Example input (from the provider)
{
"body": {
"action_type": "purchase",
"authority_scope": {
"allowed_action_types": [
"purchase"
],
"denied_action_types": [
"withdraw"
],
"human_approval_action_types": [
"transfer"
]
},
"constraints": {
"max_spend_usd": "5.00",
"prohibited_destinations": [
"blocked-market.example"
],
"required_evidence": [
"inventory_check"
]
},
"evidence_items": [
{
"name": "inventory_check",
"result": true
}
],
"operation_id": "purchase-42",
"requested_action": {
"description": "Buy an approved test asset",
"destination": "approved-market.example",
"spend_usd": "4.50"
}
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"action_type": {
"maxLength": 4096,
"type": "string"
},
"authority_scope": {
"additionalProperties": false,
"properties": {
"allowed_action_types": {
"items": {
"maxLength": 4096,
"type": "string"
},
"maxItems": 100,
"type": "array"
},
"denied_action_types": {
"items": {
"maxLength": 4096,
"type": "string"
},
"maxItems": 100,
"type": "array"
},
"human_approval_action_types": {
"items": {
"maxLength": 4096,
"type": "string"
},
"maxItems": 100,
"type": "array"
}
},
"type": "object"
},
"constraints": {
"additionalProperties": false,
"properties": {
"max_spend_usd": {
"type": [
"string",
"number"
]
},
"prohibited_destinations": {
"items": {
"maxLength": 4096,
"type": "string"
},
"maxItems": 100,
"type": "array"
},
"required_evidence": {
"items": {
"maxLength": 4096,
"type": "string"
},
"maxItems": 100,
"type": "array"
}
},
"type": "object"
},
"evidence_items": {
"items": {
"additionalProperties": false,
"properties": {
"description": {
"maxLength": 4096,
"type": "string"
},
"name": {
"maxLength": 4096,
"type": "string"
},
"result": {
"type": [
"boolean",
"null"
]
},
"source": {
"maxLength": 4096,
"type": "string"
}
},
"required": [
"name"
],
"type": "object"
},
"maxItems": 50,
"type": "array"
},
"operation_id": {
"maxLength": 4096,
"type": "string"
},
"requested_action": {
"additionalProperties": false,
"properties": {
"description": {
"maxLength": 4096,
"type": "string"
},
"destination": {
"maxLength": 4096,
"type": "string"
},
"spend_usd": {
"type": [
"string",
"number"
]
}
},
"required": [
"description"
],
"type": "object"
}
},
"required": [
"operation_id",
"action_type",
"requested_action",
"authority_scope"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"additionalProperties": false,
"properties": {
"authority_boundary": {
"type": "string"
},
"decision": {
"enum": [
"ALLOW",
"DENY",
"ESCALATE"
],
"type": "string"
},
"evidence_boundary": {
"const": "caller_supplied"
},
"matched_constraints": {
"items": {
"type": "string"
},
"type": "array"
},
"missing_evidence": {
"items": {
"type": "string"
},
"type": "array"
},
"operation_id": {
"type": "string"
},
"reason_code": {
"enum": [
"P001",
"P002",
"P003"
],
"type": "string"
},
"reasons": {
"items": {
"type": "string"
},
"type": "array"
},
"receipt_hash": {
"pattern": "^[0-9a-f]{64}$",
"type": "string"
}
},
"required": [
"operation_id",
"decision",
"reason_code",
"reasons",
"