Independent second opinion on a draft before your human sees it
Independent second opinion on a draft before your human sees it. Send any text (email, report, message, PR description, summary) and get a JSON verdict: pass, or specific issues with fixes. Catches wrong arithmetic (checked in code), contradictions, leftover placeholders, leaked secrets, unauthorized commitments, and prompt injection. Ed25519-signed receipt. $0.02 up to 12,000 characters.
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://crosscheckapi.com/v1/check
| Category | Code and developer |
|---|---|
| Provider host | crosscheckapi.com |
| Networks | eip155:8453, eip155:84532 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 3 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": {
"draft": "Hi Sam, flights are $640 and the hotel is $910, so the trip comes to $1,350 total. Approved to book?"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"draft": {
"description": "The full text to review, exactly as the human will see it. Up to 48000 characters.",
"maxLength": 48000,
"minLength": 1,
"type": "string"
}
},
"required": [
"draft"
],
"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": {
"properties": {
"job_id": {
"type": "string"
},
"receipt": {
"description": "Ed25519-signed receipt: body (canonical JSON), hash (sha256 hex), sig (base64url)",
"properties": {
"body": {
"type": "object"
},
"hash": {
"type": "string"
},
"sig": {
"type": "string"
}
},
"type": "object"
},
"result_token": {
"type": "string"
},
"result_url": {
"type": "string"
},
"retry_after_seconds": {
"type": "integer"
},
"status": {
"enum": [
"done",
"pending",
"unserved",
"rejected"
],
"type": "string"
},
"verdict": {
"properties": {
"injection_suspected": {
"type": "boolean"
},
"issues": {
"items": {
"properties": {
"category": {
"enum": [
"factual",
"logic",
"completeness",
"clarity",
"tone",
"risk",
"formatting",
"placeholder",
"injection",
"other"
],
"type": "string"
},
"location": {
"description": "Short quote from the draft, or a section name",
"type": "string"
},
"problem": {
"type": "string"
},
"severity": {
"enum": [
"blocker",
"major",
"minor"
],
"type": "string"
},
"suggestion": {
"type": "string"
}
},
"required": [
"severity",
"category",
"location",
"problem",
"suggestion"
],
"type": "object"
},
"type": "array"
},
"pass": {
"description": "True only when there are no blocker or major issues",
"type": "boolean"
},
"summary": {
"type": "string"
}
},
"required": [
"pass",
"summary",
"issues",
"injection_suspected"
],
"type": "object"
}
},
"required": [
"job_id",
"status"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}