← The evidence ledger
Evidence row 119531
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://saylorinnovations.com/api/chem/element
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 1ccbdf53a41df017113f1719e061b6fbb5312de59662a4877465e063e2fb55c2
- Leaf
- 0x30c4bcbe865a89c6202edbb601268b20563a3f4993d119e7ce743fcf94d355d8
What was observed
{
"endpoints": [
[
"x402",
"https://saylorinnovations.com/api/chem/element"
]
],
"name": "Saylor Innovations Data Desk",
"owner_address": "0xa2a8df0f7caabea4e120a2568118f141569fc8aa",
"raw": {
"accepts": [
{
"amount": "10000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"assetTransferMethod": "eip3009",
"facilitatorOnly": true,
"memo": "saylor:datadesk:element-info",
"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:element-info",
"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:element-info",
"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": "BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F",
"memo": "saylor:datadesk:element-info",
"reference": "7ydn2X5T2NCtc1ThZFuy9fxqmm4HQ1kdhgxyTFpuZ2iB",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazplbGVtZW50LWluZm8iLCJyZWZlcmVuY2UiOiI3eWRuMlg1VDJOQ3RjMVRoWkZ1eTlmeHFtbTRIUTFrZGhneHlURnB1WjJpQiIsInJlY2lwaWVudCI6IjdMU2pmckpmOGZOc0I4VkE5dTdOM1dFbjI1c21RTHBvYjNTdnlVdlhhY3k3IiwibWludCI6IkVQakZXZGQ1QXVmcVNTcWVNMnFOMXh6eWJhcEM4RzR3RUdHa1p3eVREdDF2IiwibWluQW1vdW50IjoxMDAwMCwiZXhwIjoxNzkyNTQ0MDExMDI0fQ.lwxKJzsM8ZAuz1IFcT-LuUf6inVBr14ApYRtWDmfPbI"
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
"extra": {
"feePayer": "BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F",
"memo": "saylor:datadesk:element-info",
"reference": "DjiP3ziKhKAw33vgMvNGvnuQLkVptEWMcHVtgu2Y51jz",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazplbGVtZW50LWluZm8iLCJyZWZlcmVuY2UiOiJEamlQM3ppS2hLQXczM3ZnTXZOR3ZudVFMa1ZwdEVXTWNIVnRndTJZNTFqeiIsInJlY2lwaWVudCI6IjdMU2pmckpmOGZOc0I4VkE5dTdOM1dFbjI1c21RTHBvYjNTdnlVdlhhY3k3IiwibWludCI6IkVzOXZNRnJ6YUNFUm1KZnJGNEgyRllENEtDb05rWTExTWNDZThCZW53TllCIiwibWluQW1vdW50IjoxMDAwMCwiZXhwIjoxNzkyNTQ0MDExMDI0fQ.mdhlsbXeet8VuQ9Ddtoi3qsSOHpLBySyS5EYCneLs4U"
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
},
{
"amount": "90917",
"asset": "So11111111111111111111111111111111111111112",
"extra": {
"memo": "saylor:datadesk:element-info",
"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": "93729",
"reference": "EzpDbWJN1AnEN2pvvSfqDseWQi8qUH7inc5cnFQthVic",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazplbGVtZW50LWluZm8iLCJyZWZlcmVuY2UiOiJFenBEYldKTjFBbkVOMnB2dlNmcURzZVdRaThxVUg3aW5jNWNuRlF0aFZpYyIsInJlY2lwaWVudCI6IjdMU2pmckpmOGZOc0I4VkE5dTdOM1dFbjI1c21RTHBvYjNTdnlVdlhhY3k3IiwibWludCI6bnVsbCwibWluQW1vdW50Ijo5MDkxNywiZXhwIjoxNzkyNTQ0MDExMDI0fQ.y3gIPyKNu6SsEVbkJ7uui0O69rKbvryfyB5Jygz9KiM",
"solUsdPrice": 106.69
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
}
],
"description": "Chemical element facts by symbol, name or atomic number - weight, group, electron configuration, electronegativity, melting and boiling point, density",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"q": "iron"
},
"type": "http"
},
"output": {
"example": {
"atomic_number": 26,
"atomic_radius_pm": 194,
"boiling_point_c": 2860.85,
"boiling_point_k": 3134,
"cpk_color": "#E06633",
"density_g_cm3": 7.874,
"electron_affinity_ev": 0.163,
"electron_configuration": "[Ar]4s2 3d6",
"electronegativity_pauling": 1.83,
"group_block": "Transition metal",
"ionization_energy_ev": 7.902,
"melting_point_c": 1537.85,
"melting_point_k": 1811,
"name": "Iron",
"neighbours": [
"Mn",
"Co"
],
"oxidation_states": "+3, +2",
"source": "PubChem periodic table data (NCBI, public domain) with IUPAC atomic weights",
"standard_atomic_weight": 55.845,
"standard_state": "Solid",
"symbol": "Fe",
"year_discovered": "Ancient"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"q": {
"description": "Element symbol (Fe), name (iron) or atomic number (26)",
"type": "string"
}
},
"required": [
"q"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"atomic_number": {
"description": "Atomic number",
"type": "number"
},
"atomic_radius_pm": {
"description": "Atomic radius pm",
"type": [
"number",
"null"
]
},
"boiling_point_c": {
"description": "Boiling point, in degrees Celsius",
"type": [
"number",
"null"
]
},
"boiling_point_k": {
"description": "Boiling point k",
"type": [
"number",
"null"
]
},
"cpk_color": {
"description": "Cpk color",
"type": [
"string",
"null"
]
},
"density_g_cm3": {
"description": "Density g cm3",
"type": [
"number",
"null"
]
},
"electron_affinity_ev": {
"description": "Electron affinity ev",
"type": [
"number",
"null"
]
},
"electron_configuration": {
"description": "Electron configuration",
"type": [
"string",
"null"
]
},
"electronegativity_pauling": {
"description": "Electronegativity pauling",
"type": [
"number",
"null"
]
},
"group_block": {
"description": "Group block",
"type": [
"string",
"null"
]
},
"ionization_energy_ev": {
"description": "Ionization energy ev",
"type": [
"number",
"null"
]
},
"melting_point_c": {
"description": "Melting point, in degrees Celsius",
"type": [
"number",
"null"
]
},
"melting_point_k": {
"description": "Melting point k",
"type": [
"number",
"null"
]
},
"name": {
"description": "Name",
"type": "string"
},
"neighbours": {
"description": "Symbols of the elements immediately before and after in atomic number",
"type": "array"
},
"oxidation_states": {
"description": "Oxidation states",
"type": [
"string",
"null"
]
},
"source": {
"description": "Data source the values come from",
"type": "string"
},
"standard_atomic_weight": {
"description": "Standard atomic weight",
"type": [
"number",
"null"
]
},
"standard_state": {
"description": "Standard state",
"type": [
"string",
"null"
]
},
"symbol": {
"description": "Ticker or asset symbol",
"type": "string"
},
"year_discovered": {
"description": "Year discovered",
"type": [
"string",
"null"
]
}
},
"required": [
"atomic_number",
"symbol",
"name"
],
"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": "2026-10-21T00:51:31.076Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-10-21T00:51:30.805Z"
},
"resource": "https://saylorinnovations.com/api/chem/element",
"serviceName": "Saylor Innovations Data Desk",
"tags": [
"properties of the element iron",
"atomic number and electron",
"melting point of an element",
"periodic table lookup by symbol",
"electronegativity and oxidation"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Chemical element facts by symbol, name or atomic number - weight, group, electron configuration, electronegativity, melting and boiling point, density"
}What the leaf hashes
{"body":"1ccbdf53a41df017113f1719e061b6fbb5312de59662a4877465e063e2fb55c2","id":119531,"kind":"listing","method":"baseline/1","observed_us":1793025615776741,"prev":null,"subject":"x402_bazaar:https://saylorinnovations.com/api/chem/element","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).
- 0x30c4c465103757272f47fba7024193e0b58ef512ec4ac6d533355d420a29222e
- 0xefea614ef17a29838ee5ecde2da5c89199dc2ad9c9f6bcd6cb02fb5b43cceafe
- 0x65b1afb729326db6abfc69a2c12b79be6c6238c2a4877ebe546481c213567606
- 0x8fac6e39b5baaf7f1ed50f2d9c8bf0e1245f861f1b906491401db25ba2c8c757
- 0x4ca85bee51d42070273642dc6be967827ea8af346c2892779cf4bc74cc7cd8a7
- 0xaa76fc6f0301f6b9999382e269382130757a6e19daff0cccd21ee713155de056
- 0x958e10acb32a550941f5de5afe6e3a9edac7b47de6bc2145fbf2d8678214f3ef
- 0x6bedc6a901d3ff1db44562ca2e708efaf965ca0f1ca38c9335892096cb0b58db
- 0x25ba1b9145475ea9ef33090e367d91a0fd38d074fef51cf5ad78e396de8c39ee
- 0x0886695ce8b00ff9cb3b286883a23d258a3fbdfe296f9e24a8b5f848bccd41cb
- 0x66b4d790d6ae725a0af009d5a6edacaec5a6147d597bc8410a97be11d56a00d1
- 0xd85c7204d76d26255c94ef4caa12c05addd08238caa5cdc3888ea60b74e6b940
- 0x36a44931b230976c04691d90bf3a25ed4111d74c78b672850d8025a911ca88dd
- 0x683955a5b2250ad50568d022a6580d8739b6aff1356779d72a773b088e7c289c
- 0x610738e0c43687aded83c613c73de8b5226c73c375858a167436461c522ea213
- 0x06d71bfa7d8b41d62c8836efc2c601e1cc3772d9453596b2ae4950887f3310ca
- 0x8c756542e482157df0c36464d75c937b845e4423dbbcfad08f0cf8d5a16b9a13
- 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae