Answer from TRUSTED sources only (Wikipedia, Wikidata, arXiv, Crossref/DOI, Worl
Answer from TRUSTED sources only (Wikipedia, Wikidata, arXiv, Crossref/DOI, World Bank): returns passages with URL, reliability tier and retrieval time for citation. With synthesize=true you also get an LLM answer that cites the passages and admits when they don't contain the answer.
Answeringour last check, 2026-09-24
1 of 1checks answered this week
232 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://toll402.dev/v1/lookup
| Category | Search and research |
|---|---|
| Provider host | toll402.dev |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 2 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 | $0.01 | 232 ms |
Example input (from the provider)
{
"body": {
"language": "en",
"query": "HTTP 402 payment required",
"sources": [
"wikipedia",
"wikidata"
],
"synthesize": false
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"language": {
"default": "en",
"description": "Wikipedia language edition (en, es, de, fr, pt, ...)",
"maxLength": 10,
"type": "string"
},
"maxPassages": {
"default": 6,
"maximum": 20,
"minimum": 1,
"type": "integer"
},
"query": {
"description": "Question or topic",
"maxLength": 500,
"minLength": 2,
"type": "string"
},
"sources": {
"default": [
"wikipedia",
"wikidata",
"arxiv",
"crossref"
],
"items": {
"enum": [
"wikipedia",
"wikidata",
"arxiv",
"crossref",
"worldbank"
],
"type": "string"
},
"type": "array"
},
"synthesize": {
"default": true,
"description": "Return a cited answer synthesized by an LLM (when the server has an LLM key)",
"type": "boolean"
}
},
"required": [
"query"
],
"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": {
"ms": {
"type": "integer"
},
"ok": {
"type": "boolean"
},
"result": {
"properties": {
"passages": {
"items": {
"properties": {
"retrievedAt": {
"type": "string"
},
"snippet": {
"type": "string"
},
"source": {
"type": "string"
},
"tier": {
"type": "integer"
},
"title": {
"type": "string"
},
"url": {
"type": "string"
}
},
"type": "object"
},
"type": "array"
}
},
"type": "object"
},
"tool": {
"type": "string"
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}