Answer from TRUSTED sources only (Wikipedia, Wikidata, arXiv, Crossref/DOI, World Bank): r
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.
10000 (raw units)
price
2
calls / 30d
1
unique payers
2026-09-09
updated
Provider
toll402.dev · discovered, not yet claimed by its owner
Payment (x402 accepts[])
[
{
"scheme": "exact",
"network": "eip155:8453",
"payTo": "0x318d34fa0bd69eff17fac648d2df8cf7a88b3dbe",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "10000",
"maxTimeoutSeconds": 300
}
]Output schema
{
"bazaar": {
"info": {
"input": {
"body": {
"language": "en",
"query": "HTTP 402 payment required",
"sources": [
"wikipedia",
"wikidata"
],
"synthesize": false
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"passages": [
{
"retrievedAt": "2026-09-07T00:00:00Z",
"snippet": "...",
"source": "wikipedia",
"tier": 1,
"title": "List of HTTP status codes",
"url": "https://en.wikipedia.org/wiki/List_of_HTTP_status_codes"
}
]
},
"type": "json"
}
},
"schema": {
"$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"
}
}
}Use it
curl
curl "https://toll402.dev/v1/lookup" # -> 402 Payment Required, accepts[] lists how to pay # retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid
JavaScript
const res = await fetch("https://toll402.dev/v1/lookup");
if (res.status === 402) {
const { accepts } = await res.json();
// pay one of accepts[] via an x402 client, then retry with the payment header
}Python
import httpx
res = httpx.get("https://toll402.dev/v1/lookup")
if res.status_code == 402:
accepts = res.json()["accepts"]
# pay one of accepts[] via an x402 client, then retry with the payment headerMachine-readable
Everything on this page is also available as clean JSON at /resources/7052.json, and this resource appears in /discovery/resources and /discovery/search.