← The evidence ledger
Evidence row 119600
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://saylorinnovations.com/api/data/country
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 4e8743fa2b4f679df502acce7a37ca44dd7cb90649dc1cbe1774a54ca4849e69
- Leaf
- 0x059f00d3899a3624290a6c4c38aa739bfd11f53f743fae6cd9fd1c0a501c63d2
What was observed
{
"endpoints": [
[
"x402",
"https://saylorinnovations.com/api/data/country"
]
],
"name": "Saylor Innovations Country Prof",
"owner_address": "0xa2a8df0f7caabea4e120a2568118f141569fc8aa",
"raw": {
"accepts": [
{
"amount": "10000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"assetTransferMethod": "eip3009",
"facilitatorOnly": true,
"memo": "saylor:utility:country:US",
"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:utility:country:US",
"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:utility:country:US",
"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": "BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP",
"memo": "saylor:utility:country:US",
"reference": "H1v28kULH7a8yFoX3W3XP9H3hS7DMGvUtnkdwmHDrCPk",
"session": "eyJhcnRpY2xlSWQiOiJ1dGlsaXR5OmNvdW50cnk6VVMiLCJyZWZlcmVuY2UiOiJIMXYyOGtVTEg3YTh5Rm9YM1czWFA5SDNoUzdETUd2VXRua2R3bUhEckNQayIsInJlY2lwaWVudCI6IjdMU2pmckpmOGZOc0I4VkE5dTdOM1dFbjI1c21RTHBvYjNTdnlVdlhhY3k3IiwibWludCI6IkVQakZXZGQ1QXVmcVNTcWVNMnFOMXh6eWJhcEM4RzR3RUdHa1p3eVREdDF2IiwibWluQW1vdW50IjoxMDAwMCwiZXhwIjoxNzkyOTUyNzA0MTI5fQ.AEUlgFnEZ1XaUhLLYnxopDGJfY4rVgr_GLayFqNvx54"
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
"extra": {
"feePayer": "BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP",
"memo": "saylor:utility:country:US",
"reference": "EcLjDbinLuqfEDTHGSFjMJ1K49kWZQ4TAVcqYqQjEuBL",
"session": "eyJhcnRpY2xlSWQiOiJ1dGlsaXR5OmNvdW50cnk6VVMiLCJyZWZlcmVuY2UiOiJFY0xqRGJpbkx1cWZFRFRIR1NGak1KMUs0OWtXWlE0VEFWY3FZcVFqRXVCTCIsInJlY2lwaWVudCI6IjdMU2pmckpmOGZOc0I4VkE5dTdOM1dFbjI1c21RTHBvYjNTdnlVdlhhY3k3IiwibWludCI6IkVzOXZNRnJ6YUNFUm1KZnJGNEgyRllENEtDb05rWTExTWNDZThCZW53TllCIiwibWluQW1vdW50IjoxMDAwMCwiZXhwIjoxNzkyOTUyNzA0MTI5fQ.vieXFhUB9bbs2HGrZsGbtq2F-n3qWOMoygV4zqEWSzY"
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
},
{
"amount": "95331",
"asset": "So11111111111111111111111111111111111111112",
"extra": {
"memo": "saylor:utility:country:US",
"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": "98280",
"reference": "GL3brE67kHRFuwJtcubb2SbK6jk4ypEJAWvnt56S8ayc",
"session": "eyJhcnRpY2xlSWQiOiJ1dGlsaXR5OmNvdW50cnk6VVMiLCJyZWZlcmVuY2UiOiJHTDNickU2N2tIUkZ1d0p0Y3ViYjJTYks2ams0eXBFSkFXdm50NTZTOGF5YyIsInJlY2lwaWVudCI6IjdMU2pmckpmOGZOc0I4VkE5dTdOM1dFbjI1c21RTHBvYjNTdnlVdlhhY3k3IiwibWludCI6bnVsbCwibWluQW1vdW50Ijo5NTMzMSwiZXhwIjoxNzkyOTUyNzA0MTI5fQ.H7Po92wxZWhx7vsxCEi8SgBO7tMflJsH88X_vvbwfRM",
"solUsdPrice": 101.75
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
}
],
"description": "Country code to World Bank name, region, capital, income group and lending classification",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"country": "US"
},
"type": "http"
},
"output": {
"example": {
"exampleTruncated": true,
"fixedSubject": "US",
"report": {
"attribution": "World Bank: World Development Indicators and country metadata. CC BY 4.0. Saylor normalizes the source data; no World Bank endorsement is implied.",
"capital": "Washington D.C.",
"code": "US",
"incomeGroup": "High income",
"iso3": "USA",
"lendingType": "Not classified",
"licenseUrl": "https://creativecommons.org/licenses/by/4.0/",
"limitations": "World Bank country classification metadata. Names and classifications reflect this source and are not a statement about sovereignty or a real-time demographic estimate.",
"name": "United States",
"region": "North America"
},
"retrievedAt": "2026-09-18T14:43:08.007Z",
"sample": true,
"service": "country",
"source": {
"name": "World Bank",
"url": "https://api.worldbank.org/v2/country/US?format=json"
},
"subject": "US"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"country": {
"description": "Two-letter country code supported by World Bank, for example US or GB. Aggregates are excluded.",
"type": "string"
}
},
"required": [
"country"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"queryParams"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"exampleTruncated": {
"description": "True when the example is shortened",
"type": [
"boolean",
"null"
]
},
"fixedSubject": {
"description": "True when the sample is for a fixed subject",
"type": [
"string",
"null"
]
},
"report": {
"description": "Structured report for the subject, with the fields described in the example",
"properties": {
"attribution": {
"description": "Attribution required by the source",
"type": "string"
},
"capital": {
"type": [
"string",
"null"
]
},
"code": {
"description": "Code assigned by the issuing system",
"type": "string"
},
"incomeGroup": {
"description": "Income group",
"type": [
"string",
"null"
]
},
"iso3": {
"description": "ISO 3-letter country code",
"type": "string"
},
"lendingType": {
"description": "Lending type",
"type": [
"string",
"null"
]
},
"licenseUrl": {
"description": "License URL",
"type": [
"string",
"null"
]
},
"limitations": {
"description": "Known limits of this result",
"type": "string"
},
"name": {
"description": "Name",
"type": "string"
},
"region": {
"description": "Region",
"type": [
"string",
"null"
]
}
},
"required": [
"code",
"iso3",
"name",
"attribution",
"limitations"
],
"type": "object"
},
"retrievedAt": {
"description": "Time the data was retrieved from the source (UTC)",
"format": "date-time",
"type": "string"
},
"sample": {
"description": "True when this is a fixed sample response",
"type": [
"boolean",
"null"
]
},
"service": {
"description": "Service name",
"type": "string"
},
"source": {
"description": "Data source the values come from",
"properties": {
"name": {
"description": "Name",
"type": "string"
},
"url": {
"description": "Canonical URL",
"format": "uri",
"type": "string"
}
},
"required": [
"name",
"url"
],
"type": "object"
},
"subject": {
"description": "What this response is for",
"type": "string"
}
},
"required": [
"service",
"subject",
"retrievedAt",
"source",
"report"
],
"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/v1790235422/bazaar-icons/bc5e2b3d111ebbef.jpg",
"lastUpdated": "2026-10-25T18:23:04.18Z",
"quality": {
"l30DaysTotalCalls": 24,
"l30DaysUniquePayers": 8,
"lastCalledAt": "2026-10-25T18:23:05.51Z"
},
"resource": "https://saylorinnovations.com/api/data/country",
"serviceName": "Saylor Innovations Country Prof",
"tags": [
"country",
"geography",
"enrichment"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Country code to World Bank name, region, capital, income group and lending classification"
}What the leaf hashes
{"body":"4e8743fa2b4f679df502acce7a37ca44dd7cb90649dc1cbe1774a54ca4849e69","id":119600,"kind":"listing","method":"baseline/1","observed_us":1793025616072888,"prev":null,"subject":"x402_bazaar:https://saylorinnovations.com/api/data/country","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).
- 0x059f3ea7802eb51777e97bbcfce9d822accbcd151c7320f43e043bab234eb6ef
- 0x9e0c68434b4e96720403f7db33bdb32eaf624ec1b5b4e7eac446e55d2970c5b3
- 0x551518dfc1baa459c3cf4acc6511fc8a5e776b93106fa37b5076db400fff2b2e
- 0x9f4a3d4ea8c80e76b7c7fafb9f0c9bf686feb5d03d736dbfccc3b27cb0e375fb
- 0xe0b45347d0ff04db6704a869aae8ef8b055b8d396725fbfd5fdc736adb241b49
- 0x502395be0ea1abfdc8abcff5abc0ac4984a9450e52ca062051797c7e1bf4a2ba
- 0x23e43b852ee6382d2c5ff7d4f30729fd942d6cfea4ff3f03b6efe78cda846e2d
- 0x486b649e2cd1f1ad3e4ed81f45eaa34da476b9a196a5e8c6acc45b4d88e079e7
- 0x609dc73fdeb7000e8620565b03d070e6ea6541156815807a25e2bda3e46992ba
- 0x29a79a1e444b726bf2db966f6ad9d0448d93ae7b7180fd783a410b336c52af9b
- 0x88fb9d02ea6ed7254b70cfe02388b31c183a7a709aad6303948d66f85ad516b1
- 0x7910a200eb458bec3c3badb3b2ead3e75cec5f3ba263800cea6b9f32efb53f25
- 0x610fdf3e989af0a6b4a400a3a8aab9156d757f8c96efe4e9d0594dfd04de1cc0
- 0xd1d3499072edb10edc68f84bcae2365d2ab534df689250cab18c751b6f13b6ff
- 0x7ddc2fead128357f881b63e6c7c26d7fbbb84fca6c7c8e0bbfe386de86ca8d39
- 0xc6a4d7899a0f442958e26505011190b7cff2483611c1b94eba9043e0ba9ac36e
- 0x8c756542e482157df0c36464d75c937b845e4423dbbcfad08f0cf8d5a16b9a13
- 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae