Tokenizes each claim and its supplied evidence, removes a small declared English
Tokenizes each claim and its supplied evidence, removes a small declared English stop-word list, and reports the fraction of unique claim tokens present in evidence. Coverage below a supplied threshold is flagged. This is lexical grounding screening only: overlap does not prove truth, low overlap does not prove hallucination, and the service does not retrieve or validate evidence.
Answeringour last check, 2026-09-24
1 of 1checks answered this week
886 msmedian answer time
$0.004listed price per call
$0.004price 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://aialign.halowerk.com/v1/hallucination-rate
| Category | Market data |
|---|---|
| Provider host | aialign.halowerk.com |
| 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
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.004 | 886 ms |
Example input (from the provider)
{
"body": {
"claims": [
{
"claim_id": "claim-1",
"claim_text": "The turbine generated 42 megawatt hours in August.",
"evidence_texts": [
"The August meter record reports turbine output of 42 megawatt hours."
]
},
{
"claim_id": "claim-2",
"claim_text": "The turbine had zero maintenance downtime.",
"evidence_texts": [
"The August meter record reports turbine output of 42 megawatt hours."
]
}
],
"minimum_coverage_fraction": 0.6
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"claims": {
"items": {
"additionalProperties": false,
"properties": {
"claim_id": {
"maxLength": 128,
"minLength": 1,
"type": "string"
},
"claim_text": {
"maxLength": 20000,
"minLength": 1,
"type": "string"
},
"evidence_texts": {
"items": {
"maxLength": 50000,
"minLength": 1,
"type": "string"
},
"maxItems": 100,
"minItems": 1,
"type": "array"
}
},
"required": [
"claim_id",
"claim_text",
"evidence_texts"
],
"type": "object"
},
"maxItems": 5000,
"minItems": 1,
"type": "array"
},
"minimum_coverage_fraction": {
"maximum": 1,
"minimum": 0,
"type": "number"
}
},
"required": [
"claims",
"minimum_coverage_fraction"
],
"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"
}
},
"required": [
"input"
],
"type": "object"
}