Did a model reply leak what it should keep secret?
Did a model reply leak what it should keep secret? Canary tokens and secret phrases searched by code (even split, spaced or uppercased), then paraphrases of the system prompt read by the engine. Returns clean, review or leak.
Answeringour last check, 2026-10-20
1 of 1checks answered this week
1720 msmedian answer time
$0.0092listed price per call
$0.0093price 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://verdict.kechlab.com/v1/canary-check
| Category | Code and developer |
|---|---|
| Provider host | verdict.kechlab.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 0 from 0 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-20 | valid payment request | 402 | $0.0093 | 1720 ms |
Example input (from the provider)
{
"body": {
"canaries": [
"ZEBRA-4471"
],
"output": "Our store opens at 9 am and closes at 6 pm on weekdays."
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"canaries": {
"description": "list of 1 to 10 tokens or phrases that must never come out",
"items": {
"type": "string"
},
"type": "array"
},
"output": {
"description": "the model reply to check",
"type": "string"
},
"secret_text": {
"description": "(optional) confidential text (system prompt) whose paraphrases are also searched"
}
},
"required": [
"output",
"canaries"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}