Wikidata Facts
Profile of a notable person with a Wikipedia article: birth, death, occupation, citizenship, identifiers. Never private people.
DataLiveeip155:8453Exactvia cdp
PersonWikidataBiographyIdentifiers
Calls · 30d
1
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 4 snapshots so far.
$24.31
Verified settled volume
1,175 settlements proven x402 by their on-chain EIP-3009 marker.
$0.040
Listed price
As published in the catalog. Always read the live 402 before paying.
1
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-10-20 21:01Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xb531320805C5BED1D46AEaDcF4F008FDF172DBDaThe wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact",
"network": "base",
"mimeType": "application/json",
"resource": "https://wikidata-facts.x402tookit.com/person-profile",
"description": "Profile of a notable person with a Wikipedia article: birth, death, occupation, citizenship, identifiers. Never private people.",
"outputSchema": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"person": "Albert Einstein"
}
},
"output": {
"url": "https://www.wikidata.org/wiki/Q937",
"asOf": "2026-10-11T08:43:53.300Z",
"facts": {
"citizenship": {
"values": [
{
"id": "Q159631",
"label": "Kingdom of Württemberg"
},
{
"id": "Q223050",
"label": "statelessness"
}
],
"property": "P27"
},
"dateOfBirth": {
"value": "1879-03-14",
"calendar": "gregorian",
"property": "P569",
"precision": "day"
},
"dateOfDeath": {
"value": "1955-04-18",
"calendar": "gregorian",
"property": "P570",
"precision": "day"
},
"occupations": {
"values": [
{
"id": "Q19350898",
"label": "theoretical physicist"
},
{
"id": "Q16389557",
"label": "philosopher of science"
}
],
"property": "P106"
},
"placeOfBirth": {
"values": [
{
"id": "Q3012",
"label": "Ulm"
}
],
"property": "P19"
},
"placeOfDeath": {
"values": [
{
"id": "Q138518",
"label": "Princeton"
}
],
"property": "P20"
}
},
"label": "Albert Einstein",
"source": "Wikidata (CC0)",
"missing": [],
"reasons": [
"Citizenship and places list every stated value, including past ones.",
"Dates are shown at the precision Wikidata states; no day or month is invented."
],
"summary": "Albert Einstein (Q937), 1879-03-14 to 1955-04-18: theoretical physicist, philosopher of science, inventor.",
"verdict": "PROFILE_COMPLETE",
"degraded": false,
"sourceUrl": "https://www.wikidata.org",
"wikipedia": {
"english": {
"url": "https://en.wikipedia.org/wiki/Albert_Einstein",
"title": "Albert Einstein"
},
"editions": 236
},
"disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
"notChecked": [
"private individuals: only people with at least one Wikipedia article are profiled",
"attributes this shelf deliberately does not return (family, residence, religion, health, sexuality, ethnicity)",
"…1 more"
],
"wikidataId": "Q937",
"attribution": "Data: Wikidata, CC0 1.0 public domain dedication (https://www.wikidata.org/wiki/Wikidata:Licensing).",
"description": "German-born theoretical physicist (1879–1955)",
"identifiers": [
{
"url": "https://viaf.org/viaf/75121530",
"name": "VIAF",
"value": "75121530",
"property": "P214"
},
{
"url": "https://isni.org/isni/000000012281955X",
"name": "ISNI",
"value": "000000012281955X",
"property": "P213"
}
],
"resolvedVia": "search",
"alternatives": []
}
},
"maxAmountRequired": "40000",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F"
},
"payTo": "DUPiupXtuox38dcGoXUKer5mAydCzmaHjrbQ66qeEm8s",
"scheme": "exact",
"network": "solana",
"mimeType": "application/json",
"resource": "https://wikidata-facts.x402tookit.com/person-profile",
"description": "Profile of a notable person with a Wikipedia article: birth, death, occupation, citizenship, identifiers. Never private people.",
"outputSchema": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"person": "Albert Einstein"
}
},
"output": {
"url": "https://www.wikidata.org/wiki/Q937",
"asOf": "2026-10-11T08:43:53.300Z",
"facts": {
"citizenship": {
"values": [
{
"id": "Q159631",
"label": "Kingdom of Württemberg"
},
{
"id": "Q223050",
"label": "statelessness"
}
],
"property": "P27"
},
"dateOfBirth": {
"value": "1879-03-14",
"calendar": "gregorian",
"property": "P569",
"precision": "day"
},
"dateOfDeath": {
"value": "1955-04-18",
"calendar": "gregorian",
"property": "P570",
"precision": "day"
},
"occupations": {
"values": [
{
"id": "Q19350898",
"label": "theoretical physicist"
},
{
"id": "Q16389557",
"label": "philosopher of science"
}
],
"property": "P106"
},
"placeOfBirth": {
"values": [
{
"id": "Q3012",
"label": "Ulm"
}
],
"property": "P19"
},
"placeOfDeath": {
"values": [
{
"id": "Q138518",
"label": "Princeton"
}
],
"property": "P20"
}
},
"label": "Albert Einstein",
"source": "Wikidata (CC0)",
"missing": [],
"reasons": [
"Citizenship and places list every stated value, including past ones.",
"Dates are shown at the precision Wikidata states; no day or month is invented."
],
"summary": "Albert Einstein (Q937), 1879-03-14 to 1955-04-18: theoretical physicist, philosopher of science, inventor.",
"verdict": "PROFILE_COMPLETE",
"degraded": false,
"sourceUrl": "https://www.wikidata.org",
"wikipedia": {
"english": {
"url": "https://en.wikipedia.org/wiki/Albert_Einstein",
"title": "Albert Einstein"
},
"editions": 236
},
"disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
"notChecked": [
"private individuals: only people with at least one Wikipedia article are profiled",
"attributes this shelf deliberately does not return (family, residence, religion, health, sexuality, ethnicity)",
"…1 more"
],
"wikidataId": "Q937",
"attribution": "Data: Wikidata, CC0 1.0 public domain dedication (https://www.wikidata.org/wiki/Wikidata:Licensing).",
"description": "German-born theoretical physicist (1879–1955)",
"identifiers": [
{
"url": "https://viaf.org/viaf/75121530",
"name": "VIAF",
"value": "75121530",
"property": "P214"
},
{
"url": "https://isni.org/isni/000000012281955X",
"name": "ISNI",
"value": "000000012281955X",
"property": "P213"
}
],
"resolvedVia": "search",
"alternatives": []
}
},
"maxAmountRequired": "40000",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact",
"network": "polygon",
"mimeType": "application/json",
"resource": "https://wikidata-facts.x402tookit.com/person-profile",
"description": "Profile of a notable person with a Wikipedia article: birth, death, occupation, citizenship, identifiers. Never private people.",
"outputSchema": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"person": "Albert Einstein"
}
},
"output": {
"url": "https://www.wikidata.org/wiki/Q937",
"asOf": "2026-10-11T08:43:53.300Z",
"facts": {
"citizenship": {
"values": [
{
"id": "Q159631",
"label": "Kingdom of Württemberg"
},
{
"id": "Q223050",
"label": "statelessness"
}
],
"property": "P27"
},
"dateOfBirth": {
"value": "1879-03-14",
"calendar": "gregorian",
"property": "P569",
"precision": "day"
},
"dateOfDeath": {
"value": "1955-04-18",
"calendar": "gregorian",
"property": "P570",
"precision": "day"
},
"occupations": {
"values": [
{
"id": "Q19350898",
"label": "theoretical physicist"
},
{
"id": "Q16389557",
"label": "philosopher of science"
}
],
"property": "P106"
},
"placeOfBirth": {
"values": [
{
"id": "Q3012",
"label": "Ulm"
}
],
"property": "P19"
},
"placeOfDeath": {
"values": [
{
"id": "Q138518",
"label": "Princeton"
}
],
"property": "P20"
}
},
"label": "Albert Einstein",
"source": "Wikidata (CC0)",
"missing": [],
"reasons": [
"Citizenship and places list every stated value, including past ones.",
"Dates are shown at the precision Wikidata states; no day or month is invented."
],
"summary": "Albert Einstein (Q937), 1879-03-14 to 1955-04-18: theoretical physicist, philosopher of science, inventor.",
"verdict": "PROFILE_COMPLETE",
"degraded": false,
"sourceUrl": "https://www.wikidata.org",
"wikipedia": {
"english": {
"url": "https://en.wikipedia.org/wiki/Albert_Einstein",
"title": "Albert Einstein"
},
"editions": 236
},
"disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
"notChecked": [
"private individuals: only people with at least one Wikipedia article are profiled",
"attributes this shelf deliberately does not return (family, residence, religion, health, sexuality, ethnicity)",
"…1 more"
],
"wikidataId": "Q937",
"attribution": "Data: Wikidata, CC0 1.0 public domain dedication (https://www.wikidata.org/wiki/Wikidata:Licensing).",
"description": "German-born theoretical physicist (1879–1955)",
"identifiers": [
{
"url": "https://viaf.org/viaf/75121530",
"name": "VIAF",
"value": "75121530",
"property": "P214"
},
{
"url": "https://isni.org/isni/000000012281955X",
"name": "ISNI",
"value": "000000012281955X",
"property": "P213"
}
],
"resolvedVia": "search",
"alternatives": []
}
},
"maxAmountRequired": "40000",
"maxTimeoutSeconds": 300
}
],
"x402Version": 1,
"alsoAvailable": {
"llms": "https://wikidata-facts.x402tookit.com/llms.txt",
"catalog": "https://wikidata-facts.x402tookit.com/catalog",
"message": "Wikidata Facts has 8 pay-per-call endpoints (Entities, country, city and person profiles, identifier lookups and same-as links from Wikidata.), from $0.02 a call. See the full menu and send your agents our way.",
"openapi": "https://wikidata-facts.x402tookit.com/openapi.json",
"related": [
{
"url": "https://wikidata-facts.x402tookit.com/same-as",
"path": "/same-as",
"what": "Same-as links for a Wikidata entity: VIAF, ISNI, GND, Library of Congress, GeoNames, Wiki…",
"price": "$0.02"
},
{
"url": "https://wikidata-facts.x402tookit.com/entity-facts",
"path": "/entity-facts",
"what": "Facts for one Wikidata entity: label, description, aliases, instance-of, Wikipedia links…",
"price": "$0.03"
},
{
"url": "https://wikidata-facts.x402tookit.com/place-profile",
"path": "/place-profile",
"what": "City or place profile from Wikidata: coordinates, population, country, elevation, time zo…",
"price": "$0.04"
}
]
}
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.04USDC≈ $0.04 USD
on Base · exact scheme
Pay 0.04 USDC on Base to 0xb531…2DBDa. The signed payment is good for 5 minutes.
- Paid to
- 0xb531…2DBDa
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 40000 smallest units
40000units
on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- DUPiup…eEm8s
- Token contract
- EPjFWd…TDt1v
- Payment window
- 5 minutes
40000units
on Polygon · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- 0xb531…2DBDa
- Token contract
- 0x3c49…c3359
- Payment window
- 5 minutes
40000units
on Arbitrum · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- 0xb531…2DBDa
- Token contract
- 0xaf88…e5831
- Payment window
- 5 minutes
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"amount": "40000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
},
"payTo": "DUPiupXtuox38dcGoXUKer5mAydCzmaHjrbQ66qeEm8s",
"amount": "40000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"amount": "40000",
"scheme": "exact",
"network": "eip155:137",
"maxTimeoutSeconds": 300
},
{
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"amount": "40000",
"scheme": "exact",
"network": "eip155:42161",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"person": "Albert Einstein"
}
},
"output": {
"type": "json",
"example": {
"url": "https://www.wikidata.org/wiki/Q937",
"asOf": "2026-10-11T08:43:53.300Z",
"facts": {
"citizenship": {
"values": [
{
"id": "Q159631",
"label": "Kingdom of Württemberg"
},
{
"id": "Q223050",
"label": "statelessness"
}
],
"property": "P27"
},
"dateOfBirth": {
"value": "1879-03-14",
"calendar": "gregorian",
"property": "P569",
"precision": "day"
},
"dateOfDeath": {
"value": "1955-04-18",
"calendar": "gregorian",
"property": "P570",
"precision": "day"
},
"occupations": {
"values": [
{
"id": "Q19350898",
"label": "theoretical physicist"
},
{
"id": "Q16389557",
"label": "philosopher of science"
}
],
"property": "P106"
},
"placeOfBirth": {
"values": [
{
"id": "Q3012",
"label": "Ulm"
}
],
"property": "P19"
},
"placeOfDeath": {
"values": [
{
"id": "Q138518",
"label": "Princeton"
}
],
"property": "P20"
}
},
"label": "Albert Einstein",
"source": "Wikidata (CC0)",
"missing": [],
"reasons": [
"Citizenship and places list every stated value, including past ones.",
"Dates are shown at the precision Wikidata states; no day or month is invented."
],
"summary": "Albert Einstein (Q937), 1879-03-14 to 1955-04-18: theoretical physicist, philosopher of science, inventor.",
"verdict": "PROFILE_COMPLETE",
"degraded": false,
"sourceUrl": "https://www.wikidata.org",
"wikipedia": {
"english": {
"url": "https://en.wikipedia.org/wiki/Albert_Einstein",
"title": "Albert Einstein"
},
"editions": 236
},
"disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
"notChecked": [
"private individuals: only people with at least one Wikipedia article are profiled",
"attributes this shelf deliberately does not return (family, residence, religion, health, sexuality, ethnicity)",
"…1 more"
],
"wikidataId": "Q937",
"attribution": "Data: Wikidata, CC0 1.0 public domain dedication (https://www.wikidata.org/wiki/Wikidata:Licensing).",
"description": "German-born theoretical physicist (1879–1955)",
"identifiers": [
{
"url": "https://viaf.org/viaf/75121530",
"name": "VIAF",
"value": "75121530",
"property": "P214"
},
{
"url": "https://isni.org/isni/000000012281955X",
"name": "ISNI",
"value": "000000012281955X",
"property": "P213"
}
],
"resolvedVia": "search",
"alternatives": []
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"person"
],
"properties": {
"hint": {
"type": "string",
"description": "Optional words to disambiguate a name, e.g. 'basketball' for Michael Jordan"
},
"person": {
"type": "string",
"description": "Name or Wikidata Q-id of a person with a Wikipedia article, e.g. Marie Curie"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"properties": {
"url": {
"type": [
"null",
"string"
]
},
"asOf": {
"type": [
"null",
"string"
]
},
"facts": {
"type": [
"null",
"object"
],
"properties": {
"citizenship": {
"type": [
"null",
"object"
],
"properties": {
"values": {
"type": [
"array",
"null"
],
"items": {
"type": "object",
"properties": {
"id": {
"type": [
"null",
"string"
]
},
"label": {
"type": [
"null",
"string"
]
}
}
}
},
"property": {
"type": [
"null",
"string"
]
}
}
},
"dateOfBirth": {
"type": [
"null",
"object"
],
"properties": {
"value": {
"type": [
"null",
"string"
]
},
"calendar": {
"type": [
"null",
"string"
]
},
"property": {
"type": [
"null",
"string"
]
},
"precision": {
"type": [
"null",
"string"
]
}
}
},
"dateOfDeath": {
"type": [
"null",
"object"
],
"properties": {
"value": {
"type": [
"null",
"string"
]
},
"calendar": {
"type": [
"null",
"string"
]
},
"property": {
"type": [
"null",
"string"
]
},
"precision": {
"type": [
"null",
"string"
]
}
}
},
"occupations": {
"type": [
"null",
"object"
],
"properties": {
"values": {
"type": [
"array",
"null"
],
"items": {
"type": "object",
"properties": {
"id": {
"type": [
"null",
"string"
]
},
"label": {
"type": [
"null",
"string"
]
}
}
}
},
"property": {
"type": [
"null",
"string"
]
}
}
},
"placeOfBirth": {
"type": [
"null",
"object"
],
"properties": {
"values": {
"type": [
"array",
"null"
],
"items": {
"type": "object",
"properties": {
"id": {
"type": [
"null",
"string"
]
},
"label": {
"type": [
"null",
"string"
]
}
}
}
},
"property": {
"type": [
"null",
"string"
]
}
}
},
"placeOfDeath": {
"type": [
"null",
"object"
],
"properties": {
"values": {
"type": [
"array",
"null"
],
"items": {
"type": "object",
"properties": {
"id": {
"type": [
"null",
"string"
]
},
"label": {
"type": [
"null",
"string"
]
}
}
}
},
"property": {
"type": [
"null",
"string"
]
}
}
}
}
},
"label": {
"type": [
"null",
"string"
]
},
"source": {
"type": [
"null",
"string"
]
},
"missing": {
"type": [
"array",
"null"
]
},
"reasons": {
"type": [
"array",
"null"
],
"items": {
"type": "string"
}
},
"summary": {
"type": [
"null",
"string"
]
},
"verdict": {
"type": [
"null",
"string"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"sourceUrl": {
"type": [
"null",
"string"
]
},
"wikipedia": {
"type": [
"null",
"object"
],
"properties": {
"english": {
"type": [
"null",
"object"
],
"properties": {
"url": {
"type": [
"null",
"string"
]
},
"title": {
"type": [
"null",
"string"
]
}
}
},
"editions": {
"type": [
"null",
"number"
]
}
}
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"notChecked": {
"type": [
"array",
"null"
],
"items": {
"type": "string"
}
},
"wikidataId": {
"type": [
"null",
"string"
]
},
"attribution": {
"type": [
"null",
"string"
]
},
"description": {
"type": [
"null",
"string"
]
},
"identifiers": {
"type": [
"array",
"null"
],
"items": {
"type": "object",
"properties": {
"url": {
"type": [
"null",
"string"
]
},
"name": {
"type": [
"null",
"string"
]
},
"value": {
"type": [
"null",
"string"
]
},
"property": {
"type": [
"null",
"string"
]
}
}
}
},
"resolvedVia": {
"type": [
"null",
"string"
]
},
"alternatives": {
"type": [
"array",
"null"
]
}
}
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-10-20 21:01Z
- Last indexed by Roundhouse
- 2026-10-22 12:40Z
- Last enriched (probe, favicon, geo)
- 2026-10-20 21:45Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 402
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 4 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service Wikidata Facts and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=Wikidata%20Facts' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://wikidata-facts.x402tookit.com/person-profile, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Either pay over x402 (mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.