Verify whether a public source supports, contradicts, or provides insufficient e
Verify whether a public source supports, contradicts, or provides insufficient evidence for a factual claim. Source based fact checking for AI agents, research agents, citation verification, and evidence grounded answers.
Answeringour last check, 2026-10-10
1 of 1checks answered this week
1716 msmedian answer time
$0.01listed price per call
$0.01price 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://api.thetruthpal.com/v1/verify
| Category | Search and research |
|---|---|
| Provider host | api.thetruthpal.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 6 from 2 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-10 | valid payment request | 402 | $0.01 | 1716 ms |
Example input (from the provider)
{
"body": {
"claim": "The Moon formed several billion years ago",
"source_url": "https://science.nasa.gov/moon/facts/"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"claim": {
"description": "The factual claim you want TruthPal to evaluate.",
"type": "string"
},
"source_url": {
"description": "The public HTTP or HTTPS source containing the evidence to evaluate.",
"type": "string"
}
},
"required": [
"claim",
"source_url"
],
"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": {
"confidence": {
"maximum": 1,
"minimum": 0,
"type": "number"
},
"contradicting_evidence": {
"items": {
"type": "string"
},
"type": "array"
},
"reasoning": {
"type": "string"
},
"source_freshness": {
"enum": [
"current",
"dated",
"unknown"
],
"type": "string"
},
"supporting_evidence": {
"items": {
"type": "string"
},
"type": "array"
},
"verdict": {
"enum": [
"supported",
"contradicted",
"uncertain"
],
"type": "string"
}
},
"required": [
"verdict",
"confidence",
"supporting_evidence",
"contradicting_evidence",
"reasoning",
"source_freshness"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}