← The evidence ledger
Evidence row 120495
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://saylorinnovations.com/api/places/wikipedia-nearby
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 123517be584c8c0f603152f9dc6075a6c721e963c5fce080f8789da76ff929df
- Leaf
- 0x49fc64292c46de51b55bed167db1d3cf0b1198905fe238ac1f7e6e9bd4b06700
What was observed
{
"endpoints": [
[
"x402",
"https://saylorinnovations.com/api/places/wikipedia-nearby"
]
],
"name": "Saylor Innovations Data Desk",
"owner_address": "0xa2a8df0f7caabea4e120a2568118f141569fc8aa",
"raw": {
"accepts": [
{
"amount": "10000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"assetTransferMethod": "eip3009",
"facilitatorOnly": true,
"memo": "saylor:datadesk:wikipedia-nearby",
"name": "USD Coin",
"note": "Base settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
"version": "2"
},
"maxTimeoutSeconds": 120,
"network": "eip155:8453",
"payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"assetTransferMethod": "eip3009",
"facilitatorOnly": true,
"memo": "saylor:datadesk:wikipedia-nearby",
"name": "USD Coin",
"note": "Polygon settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
"version": "2"
},
"maxTimeoutSeconds": 120,
"network": "eip155:137",
"payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"assetTransferMethod": "eip3009",
"facilitatorOnly": true,
"memo": "saylor:datadesk:wikipedia-nearby",
"name": "USD Coin",
"note": "Arbitrum settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
"version": "2"
},
"maxTimeoutSeconds": 120,
"network": "eip155:42161",
"payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb",
"memo": "saylor:datadesk:wikipedia-nearby",
"reference": "E3PM5qTG1GjDWfz3Z2cSzCRKvSgh1Q89XF2Ex4yf1eHF",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazp3aWtpcGVkaWEtbmVhcmJ5IiwicmVmZXJlbmNlIjoiRTNQTTVxVEcxR2pEV2Z6M1oyY1N6Q1JLdlNnaDFRODlYRjJFeDR5ZjFlSEYiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOiJFUGpGV2RkNUF1ZnFTU3FlTTJxTjF4enliYXBDOEc0d0VHR2tad3lURHQxdiIsIm1pbkFtb3VudCI6MTAwMDAsImV4cCI6MTc5MjM3OTU4Nzg1NX0.aWfK01UW0fYIUBOer5EzJer-z1PKn7uZh3jXcUcHiXw"
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
"extra": {
"feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb",
"memo": "saylor:datadesk:wikipedia-nearby",
"reference": "DrvcFPTJqqHgeyvUqEFqaK7xmRHkan7W5UYdJXj2ruxb",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazp3aWtpcGVkaWEtbmVhcmJ5IiwicmVmZXJlbmNlIjoiRHJ2Y0ZQVEpxcUhnZXl2VXFFRnFhSzd4bVJIa2FuN1c1VVlkSlhqMnJ1eGIiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOiJFczl2TUZyemFDRVJtSmZyRjRIMkZZRDRLQ29Oa1kxMU1jQ2U4QmVud05ZQiIsIm1pbkFtb3VudCI6MTAwMDAsImV4cCI6MTc5MjM3OTU4Nzg1NX0.L8FAXoBFrHeqG0A_277-mqLSiJyNJ-oQu0lD1qZVzak"
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
},
{
"amount": "92082",
"asset": "So11111111111111111111111111111111111111112",
"extra": {
"memo": "saylor:datadesk:wikipedia-nearby",
"native": true,
"note": "Native SOL: send lamports with a system transfer, not an SPL transfer. Price is quoted live and this quote expires in 120s.",
"quotedLamports": "94930",
"reference": "7VciguCPZJqguTTzKVp9HSy2zST3zuXYL2VwPZdcHumh",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazp3aWtpcGVkaWEtbmVhcmJ5IiwicmVmZXJlbmNlIjoiN1ZjaWd1Q1BaSnFndVRUektWcDlIU3kyelNUM3p1WFlMMlZ3UFpkY0h1bWgiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOm51bGwsIm1pbkFtb3VudCI6OTIwODIsImV4cCI6MTc5MjM3OTU4Nzg1NX0.IfnL_AII0OTRWIQsXxSqJjLPYULWu2kHVFT1RPXoN_g",
"solUsdPrice": 105.34
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
}
],
"description": "Wikipedia articles near a coordinate within a radius - title, short description, summary, distance in metres, position and Wikidata id, nearest first",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"lat": "48.8584",
"limit": "6",
"lon": "2.2945",
"radius": "800"
},
"type": "http"
},
"output": {
"example": {
"center": {
"lat": 48.8584,
"lon": 2.2945
},
"count": 6,
"note": "English Wikipedia articles with coordinates near the point, nearest first; useful for landmarks, history and context around a location.",
"places": [
{
"description": "Tower in Paris, France",
"distance_m": 20,
"lat": 48.85822,
"lon": 2.2945,
"summary": "The Eiffel Tower ( EYE-fəl; French: Tour Eiffel [tuʁ ɛfɛl] ) is a lattice tower on the Champ de Mars in Paris, France. It is named after the engineer Gustave Eiffel, whose company designed and built the tower from 1887 …",
"title": "Eiffel Tower",
"url": "https://en.wikipedia.org/?curid=9232",
"wikidata": "Q243"
},
{
"description": null,
"distance_m": 161,
"lat": 48.8575,
"lon": 2.29278,
"summary": "The Globe Céleste was an icon of the Exposition Universelle of 1900 in Paris, similar to the Eiffel Tower. It was constructed in the shape of a large globe and stood close to the Eiffel Tower. It was in the form of a bl…",
"title": "Globe Céleste",
"url": "https://en.wikipedia.org/?curid=16201796",
"wikidata": "Q1468897"
},
{
"description": "Palace on the Grand Canal, Venice",
"distance_m": 161,
"lat": 48.8583,
"lon": 2.2923,
"summary": "The Palazzo Bernardo Nani Lucheschi, also called the Palazzo Nani Bernardo, is a Renaissance-style palace between the Palazzo Giustinian Bernardo and the larger and more grandiose Ca' Rezzonico, on the Grand Canal in th…",
"title": "Palazzo Bernardo Nani",
"url": "https://en.wikipedia.org/?curid=48435351",
"wikidata": "Q16585996"
},
{
"description": "Bridge in Paris",
"distance_m": 222,
"lat": 48.85972,
"lon": 2.29222,
"summary": "Pont d'Iéna (French: [pɔ̃ djena]; English: Jena Bridge) is a bridge spanning the River Seine in Paris. It links the Eiffel Tower on the Left Bank to the district of Trocadéro on the Right Bank.",
"title": "Pont d'Iéna",
"url": "https://en.wikipedia.org/?curid=14001337",
"wikidata": "Q540781"
},
{
"description": "English-language lending library in Paris, France",
"distance_m": 334,
"lat": 48.8589,
"lon": 2.299,
"summary": "The American Library in Paris is the largest English-language lending library on the European mainland. It operates as an independent, non-profit cultural association in France incorporated under the laws of Delaware. L…",
"title": "American Library in Paris",
"url": "https://en.wikipedia.org/?curid=41381962",
"wikidata": "Q17511676"
},
{
"description": "Museum for indigenous art in Paris",
"distance_m": 346,
"lat": 48.8608,
"lon": 2.2975,
"summary": "The Musée du Quai Branly – Jacques Chirac (French pronunciation: [myze dy ke bʁɑ̃li ʒak ʃiʁak]; English: Jacques Chirac Museum of Quay Branly, MQB) is an art museum located in Paris, France. The museum, designed by Fren…",
"title": "Musée du Quai Branly – Jacques Chirac",
"url": "https://en.wikipedia.org/?curid=5455300",
"wikidata": "Q167863"
}
],
"radius_m": 800,
"source": "Wikipedia GeoData"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"lat": {
"description": "Latitude -90 to 90",
"type": "string"
},
"limit": {
"description": "optional 1-25, default 10",
"type": "string"
},
"lon": {
"description": "Longitude -180 to 180",
"type": "string"
},
"radius": {
"description": "optional metres 10-10000, default 1000",
"type": "string"
}
},
"required": [
"lat",
"lon"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"center": {
"description": "Centre or facility that produced the record",
"type": "object"
},
"count": {
"description": "Number of items returned",
"type": "number"
},
"note": {
"description": "Caveat or context for reading the result",
"type": "string"
},
"places": {
"description": "Nearby Wikipedia articles with title, description, distance in metres, coordinates and page link",
"items": {
"properties": {
"description": {
"description": "Short description"
},
"distance_m": {
"description": "Distance, in metres"
},
"lat": {
"description": "Latitude in decimal degrees"
},
"lon": {
"description": "Longitude in decimal degrees"
},
"summary": {
"description": "Short summary"
},
"title": {
"description": "Title"
},
"url": {
"description": "Canonical URL"
},
"wikidata": {
"description": "Wikidata id of the place",
"type": [
"string",
"null"
]
}
},
"type": "object"
},
"type": "array"
},
"radius_m": {
"description": "Radius, in metres",
"type": "number"
},
"source": {
"description": "Data source the values come from",
"type": "string"
}
},
"required": [
"center",
"places"
],
"type": "object"
},
"type": {
"const": "json",
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1791811517/bazaar-icons/bc5e2b3d111ebbef.jpg",
"lastUpdated": "2026-10-19T03:11:07.892Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-10-19T03:11:07.584Z"
},
"resource": "https://saylorinnovations.com/api/places/wikipedia-nearby",
"serviceName": "Saylor Innovations Data Desk",
"tags": [
"landmarks near these coordinates",
"what is near this location",
"points of interest around lat",
"nearby historic sites",
"wikipedia articles near me"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Wikipedia articles near a coordinate within a radius - title, short description, summary, distance in metres, position and Wikidata id, nearest first"
}What the leaf hashes
{"body":"123517be584c8c0f603152f9dc6075a6c721e963c5fce080f8789da76ff929df","id":120495,"kind":"listing","method":"baseline/1","observed_us":1793025618148586,"prev":null,"subject":"x402_bazaar:https://saylorinnovations.com/api/places/wikipedia-nearby","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (296695 rows).
- 0x49fc865272498150b23a7bb4282cf395abe86313f27d57164e97942c5e778ad3
- 0x7a5fe880316ea0370be77be96c74a44bc6cd23517a85d9d9557cef3d8a35705f
- 0x643b374bb614aeca41869f7f0838a46a192e758d3c1a9b06b5ba61b9de0a6bd1
- 0xd704b3340b0a471f34d07863d3dcfd2eacaa92f70b492f4837eacf6f9c48e203
- 0x144b1240de83844eda2dc77061ea0fa83a82f9244d088386799128ba6771bb1f
- 0x991ff51b09a4de191e2e1a095ff2b1736d8bfc85b794667efab6baff047436b9
- 0x6a8032c959d61f9dcf4412712749e5e0c0696e3f0b6d9074125dc30d33ddc2b7
- 0xcf06d7186f50a2e929672dfea48062177e49640fde8b4fc74a13b5c1b71a9231
- 0x7bac93652122e6362b79a79900bc9599a675ccb6c8a1cf4ccc520943bfe821dc
- 0xc5b02e18acc2bf5e20929ae3673a14ea6bf4561de28d14bdef58038c731f9754
- 0x36446ee01203fb6b2027599f737b7bdd64e3db182e50230f9c82fff4f67be776
- 0xee7d5711cd2515f4b08f3e4041d3d56304f9db6bffd82d82746f0f4ea43b8f26
- 0xb86fa861d04737cb507e721eefbb066d26528fdb6017b1145c18d1223b93ee21
- 0x88e326a39b26e2c125306c9d3805d14398ace088bba9a2a0aa376b811cfb201a
- 0x2be1e80e065dd6b2cc75a7142be22225acd144ac975d70bf24b4f01fd76dc497
- 0x2e6a32eb32761c210560e852405e2f865f958ddbe01027894f8b9c1b3433b9f0
- 0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
- 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae