Verify output another AI agent hands back, by code alone, for $0.005
Verify output another AI agent hands back, by code alone, for $0.005: no model call, answers in about a second. Recomputes the deliverable's written sums, totals, percentages, dates, weekdays, time spans, unit conversions, and list counts; checks lengths the task asks for; flags placeholders and prompt injection; measures words, items, and JSON shape. Signed receipt, tier lite. For every requirement judged, use accept ($0.03).
Answeringour last check, 2026-09-28
1 of 1checks answered this week
941 msmedian answer time
$0.005listed price per call
$0.005price 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://crosscheckapi.com/v1/accept-lite
| Category | Code and developer |
|---|---|
| Provider host | crosscheckapi.com |
| Networks | eip155:8453, eip155:84532 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-28 | valid payment request | 402 | $0.005 | 941 ms |
Example input (from the provider)
{
"body": {
"deliverable": "Q3 spend came to $8,450 in total ($4,200 on ads, $2,850 on tools, and $1,900 on contractors).",
"task": "Summarize Q3 spend by category in under 50 words."
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"deliverable": {
"description": "What came back, exactly as received",
"minLength": 1,
"type": "string"
},
"payment_network": {
"description": "CAIP-2 network of payment_tx, default eip155:8453",
"type": "string"
},
"payment_tx": {
"description": "Optional: the transaction you paid the other agent with; verified on-chain and bound to the receipt",
"pattern": "^0x[0-9a-fA-F]{64}$",
"type": "string"
},
"ref": {
"description": "Optional: the hash of a crosscheck receipt that referred you. Its wallet earns check credits from your first 90 days of spend.",
"pattern": "^[0-9a-f]{64}$",
"type": "string"
},
"reference": {
"description": "Optional order id or transaction hash to record on the receipt",
"maxLength": 200,
"type": "string"
},
"task": {
"description": "The task you gave the other agent or service, including every requirement",
"minLength": 1,
"type": "string"
}
},
"required": [
"task",
"deliverable"
],
"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": {
"code_checks": {
"description": "What code found (wrong_sums, wrong_percentages, wrong_weekdays, wrong_date_spans, wrong_time_spans, wrong_time_zones, wrong_units, wrong_list_counts, wrong_superlatives, wrong_lengths) and measured (words, list_items, json, json_items)",
"type": "object"
},
"injection_suspected": {
"type": "boolean"
},
"note": {
"type": "string"
},
"pass": {
"description": "True only when code found no problem; never means the task was met",
"type": "boolean"
},
"placeholder": {
"type": "boolean"
},
"problems": {
"type": "integer"
},
"result": {
"enum": [
"problems_found",
"no_problems_found"
],
"type": "string"
},
"summary": {
"type": "string"
},
"tier": {
"enum": [
"lite"
],
"type": "string"
}
},
"required": [
"tier",
"result",
"pass",
"summary",
"problems",
"code_checks",
"placeholder",
"injection_suspected",
"note"
],
"type": "object"
}
},
"required": [
"job_id",
"status"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}