← The evidence ledger
Evidence row 751932
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://saylorinnovations.com/api/energy/appliance-cost
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- ca533cc7efdacd0b55020969a10eabad1050272d786b73c0fb17ac06b48416f0
- Leaf
- 0xc6f506f71667df4455d650762a418c047903d99ebdfc60b257ea19618cbf286b
What was observed
{
"endpoints": [
[
"x402",
"https://saylorinnovations.com/api/energy/appliance-cost"
]
],
"name": "Saylor Innovations Data Desk",
"owner_address": "0xa2a8df0f7caabea4e120a2568118f141569fc8aa",
"raw": {
"accepts": [
{
"amount": "10000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"assetTransferMethod": "eip3009",
"facilitatorOnly": true,
"memo": "saylor:datadesk:appliance-runnin",
"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:appliance-runnin",
"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:appliance-runnin",
"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:appliance-runnin",
"reference": "EBt1cLXoPuPhFsb67YTFgkBNWETRuWFW5YE9sUtgiPBe",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazphcHBsaWFuY2UtcnVubmluZy1jb3N0IiwicmVmZXJlbmNlIjoiRUJ0MWNMWG9QdVBoRnNiNjdZVEZna0JOV0VUUnVXRlc1WUU5c1V0Z2lQQmUiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOiJFUGpGV2RkNUF1ZnFTU3FlTTJxTjF4enliYXBDOEc0d0VHR2tad3lURHQxdiIsIm1pbkFtb3VudCI6MTAwMDAsImV4cCI6MTc5MzE2MzQxODY0MX0.i-VFJiWfWVOnwuxR1CKzaMPfS-AAKjY2WxMmRktBTs0"
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
"extra": {
"feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb",
"memo": "saylor:datadesk:appliance-runnin",
"reference": "F1edGrWt72NTQR7eUvJxK2biZ2Jgbhk22pdCTaQkMFKy",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazphcHBsaWFuY2UtcnVubmluZy1jb3N0IiwicmVmZXJlbmNlIjoiRjFlZEdyV3Q3Mk5UUVI3ZVV2SnhLMmJpWjJKZ2JoazIycGRDVGFRa01GS3kiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOiJFczl2TUZyemFDRVJtSmZyRjRIMkZZRDRLQ29Oa1kxMU1jQ2U4QmVud05ZQiIsIm1pbkFtb3VudCI6MTAwMDAsImV4cCI6MTc5MzE2MzQxODY0MX0.ErEKfub2lq1_MYtR1IMVmMPcXC2nLjOS_WhDnWQjWE0"
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
},
{
"amount": "95144",
"asset": "So11111111111111111111111111111111111111112",
"extra": {
"memo": "saylor:datadesk:appliance-runnin",
"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": "98087",
"reference": "CDoCWzX6maeMoX9HBjw3XqDhsQPTbEtKxjwdexfHCfNL",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazphcHBsaWFuY2UtcnVubmluZy1jb3N0IiwicmVmZXJlbmNlIjoiQ0RvQ1d6WDZtYWVNb1g5SEJqdzNYcURoc1FQVGJFdEt4andkZXhmSENmTkwiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOm51bGwsIm1pbkFtb3VudCI6OTUxNDQsImV4cCI6MTc5MzE2MzQxODY0MX0.sJY2mwsX7du00OWFugcaE2XMSSM4ujanSKV0Mme85iA",
"solUsdPrice": 101.95
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
}
],
"description": "Running cost of any appliance from watts, hours and electricity price: kWh and cost per day, month and year, standby draw share and CO2 estimate.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"hours_per_day": "3",
"rate_per_kwh": "0.17",
"standby_watts": "2",
"watts": "1500"
},
"type": "http"
},
"output": {
"example": {
"co2_factor_assumed": 0.4,
"co2_kg_per_year": 663.1,
"cost_per_day": 0.7721,
"cost_per_hour": 0.255,
"cost_per_month": 23.49,
"cost_per_year": 281.83,
"days_per_year": 365,
"hours_per_day": 3,
"kwh_per_day": 4.542,
"kwh_per_month": 138.153,
"kwh_per_year": 1657.83,
"note": "Cost = watts x hours / 1000 x rate. Nameplate watts overstate real draw for appliances that cycle (fridges, heaters), so measure with a plug meter when accuracy matters. The CO2 factor is an assumption you can override.",
"quantity": 1,
"source": "Energy and cost arithmetic",
"standby_cost_per_year": 2.61,
"standby_share_percent": 0.92,
"watts": 1500
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"hours_per_day": {
"description": "hours in use each day",
"type": "string"
},
"rate_per_kwh": {
"description": "electricity price per kWh",
"type": "string"
},
"standby_watts": {
"description": "optional draw when off",
"type": "string"
},
"watts": {
"description": "appliance power draw in watts",
"type": "string"
}
},
"required": [
"watts",
"hours_per_day",
"rate_per_kwh"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"co2_factor_assumed": {
"description": "kg CO2 per kWh assumed",
"type": [
"number",
"null"
]
},
"co2_kg_per_year": {
"description": "Estimated emissions per year",
"type": "number"
},
"cost_per_day": {
"description": "Average cost per day",
"type": "number"
},
"cost_per_hour": {
"description": "Cost of one hour of use",
"type": "number"
},
"cost_per_month": {
"description": "Average cost per month",
"type": "number"
},
"cost_per_year": {
"description": "Cost per year",
"type": "number"
},
"days_per_year": {
"description": "Days of use per year",
"type": [
"number",
"null"
]
},
"hours_per_day": {
"description": "Hours in use per day",
"type": "number"
},
"kwh_per_day": {
"description": "Average energy per day",
"type": "number"
},
"kwh_per_month": {
"description": "Average energy per month",
"type": "number"
},
"kwh_per_year": {
"description": "Energy per year including standby",
"type": "number"
},
"note": {
"description": "Plain-language caveat about how to read and use the result",
"type": "string"
},
"quantity": {
"description": "Number of units",
"type": [
"number",
"null"
]
},
"source": {
"description": "Where the data or formula comes from",
"type": "string"
},
"standby_cost_per_year": {
"description": "Yearly cost of standby draw",
"type": "number"
},
"standby_share_percent": {
"description": "Share of energy used while off",
"type": "number"
},
"watts": {
"description": "Power draw used",
"type": "number"
}
},
"required": [
"cost_per_year",
"kwh_per_year"
],
"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/v1792548358/bazaar-icons/bc5e2b3d111ebbef.jpg",
"lastUpdated": "2026-10-28T04:54:58.669Z",
"quality": {
"l30DaysTotalCalls": 1,
"l30DaysUniquePayers": 1,
"lastCalledAt": "2026-10-28T04:54:58.53Z"
},
"resource": "https://saylorinnovations.com/api/energy/appliance-cost",
"serviceName": "Saylor Innovations Data Desk",
"tags": [
"appliance electricity cost",
"cost to run a space heater",
"watts to kwh cost",
"standby power cost per year",
"monthly electric cost of device"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Running cost of any appliance from watts, hours and electricity price: kWh and cost per day, month and year, standby draw share and CO2 estimate."
}What the leaf hashes
{"body":"ca533cc7efdacd0b55020969a10eabad1050272d786b73c0fb17ac06b48416f0","id":751932,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793178793448752,"prev":null,"subject":"x402_bazaar:https://saylorinnovations.com/api/energy/appliance-cost","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (231336 rows).
- 0xc6f4ef5bef1c9758938d3f63394fff24ba663783372f07f37380063cbdba9498
- 0x8faef8e1cfee70435dfbff5f37340cb2b737d4895b159b0cf191647262f31d4e
- 0x82ea6b091f7a15993c4d861f37e0ca54dc66b0075d714fc3d706e75fe2f38819
- 0xc3c56c9ebdd319be8a896a5fd4af39e085a7f9e58b5099f7350d865b6216cae1
- 0x211d33b4aa227bc669b6b8a4b06b457a0f66237fb4ab2a6746f99397fe28a60b
- 0x71954cd9690a2b64371ceba5aef2c6878bfb9b17912cc4329f3d1d6531dfd2d6
- 0x03145a0b13fe33fdeb4d45db11e27fb4bded34500476078064b451a988177c6e
- 0x97961970a59b5d9bb834149fdcd4ffef2f9400e966dbafeeab5ade87d0135746
- 0x151c30d173f8641d526c8f3e99380a607760a12dbdb1bcf2d472928cf8a03165
- 0xc87267e3b935ba23e73a4dd3dcbaa4e8ae82c6645f8e1ca749b7a620d4ca2440
- 0x9e9c8089c967c0109f6e9f98dab315f62ecdf28550d13e977978b255509422d6
- 0xd0f3c2a27993f124c3562c91b39fd9ece09fb5021a89c15558338718a5bfa4a0
- 0xc5e194226ea62d0d597c9eb0fabf3d09ccea2d41c32be367d96394755e91de3a
- 0x4dedfee32d37ea3cdc60e339d676b411d314f945b00a30f8e3bd1e0470526cf9
- 0xc21e7661f5d6220994a88cc71b1262eeee3b912a2d383d18f38a631c534bfd71
- 0x32beeeb960280bc48748681cb10297ede9403461fe9c8143fdf946548e552926
- 0xe08e8bd91858a8a10c46ecde9c29a6288b960987303173c5e882afb46ce91fa0
- 0xe6cfe00ae4e02bc12327e45b5f3334ea5850ba3bcc8e3101d30a8189856a95af
- Day root
- 0x2c19037464cc4c493624565f01775d6446fc78eaa118fc6865bfe2bfca9ff78e
- Chained
- 0xd1d7dee8322ceff8f4c8d83aa1fe4a4466825c2af1c97dbde3d35db61234f7be
- Published
- On Arc Testnet, block 69584042: 0x8bae2b1d097834c8b458513862d70d29ee807e98dc2e863b27250131c15b35ae