← The evidence ledger
Evidence row 2199478
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://energy.halowerk.com/price/forecast
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 6a42a5ee4cc75c1930a84eaf10561c4d223803d5d1f273a9023fc9549f362bd6
- Leaf
- 0xd3ab864ea5e467f72e561bf84743fda13d36f4bab1047eb9cbb343fbf0513608
What was observed
{
"endpoints": [
[
"x402",
"https://energy.halowerk.com/price/forecast"
]
],
"name": "HALOWERK Energy",
"owner_address": "0x2880edfff13100677bf97a3cbdf3bc34771c4e5e",
"raw": {
"accepts": [
{
"amount": "5000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"asset": "USDC",
"assetTransferMethod": "eip3009",
"decimals": 6,
"eip712Domain": {
"chainId": 8453,
"name": "USD Coin",
"verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"version": "2"
},
"name": "USD Coin",
"network_name": "Base Mainnet",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
"scheme": "exact"
}
],
"description": "Energy-trading and flexible-load agents buy this endpoint to compare the next 24 hours of EPEX prices and volatility.",
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"hourly": [
{
"end": "2026-07-13T23:00:00.000Z",
"price_ct_kwh": "13.96",
"price_eur_mwh": 139.64,
"start": "2026-07-13T22:00:00.000Z"
},
{
"end": "2026-07-14T00:00:00.000Z",
"price_ct_kwh": "13.39",
"price_eur_mwh": 133.89,
"start": "2026-07-13T23:00:00.000Z"
},
{
"end": "2026-07-14T01:00:00.000Z",
"price_ct_kwh": "12.73",
"price_eur_mwh": 127.35,
"start": "2026-07-14T00:00:00.000Z"
},
{
"end": "2026-07-14T02:00:00.000Z",
"price_ct_kwh": "12.72",
"price_eur_mwh": 127.22,
"start": "2026-07-14T01:00:00.000Z"
},
{
"end": "2026-07-14T03:00:00.000Z",
"price_ct_kwh": "12.77",
"price_eur_mwh": 127.65,
"start": "2026-07-14T02:00:00.000Z"
},
{
"end": "2026-07-14T04:00:00.000Z",
"price_ct_kwh": "13.50",
"price_eur_mwh": 135.02,
"start": "2026-07-14T03:00:00.000Z"
},
{
"end": "2026-07-14T05:00:00.000Z",
"price_ct_kwh": "14.58",
"price_eur_mwh": 145.81,
"start": "2026-07-14T04:00:00.000Z"
},
{
"end": "2026-07-14T06:00:00.000Z",
"price_ct_kwh": "15.23",
"price_eur_mwh": 152.27,
"start": "2026-07-14T05:00:00.000Z"
},
{
"end": "2026-07-14T07:00:00.000Z",
"price_ct_kwh": "13.57",
"price_eur_mwh": 135.67,
"start": "2026-07-14T06:00:00.000Z"
},
{
"end": "2026-07-14T08:00:00.000Z",
"price_ct_kwh": "12.19",
"price_eur_mwh": 121.89,
"start": "2026-07-14T07:00:00.000Z"
},
{
"end": "2026-07-14T09:00:00.000Z",
"price_ct_kwh": "10.75",
"price_eur_mwh": 107.48,
"start": "2026-07-14T08:00:00.000Z"
},
{
"end": "2026-07-14T10:00:00.000Z",
"price_ct_kwh": "9.17",
"price_eur_mwh": 91.69,
"start": "2026-07-14T09:00:00.000Z"
},
{
"end": "2026-07-14T11:00:00.000Z",
"price_ct_kwh": "6.40",
"price_eur_mwh": 64.04,
"start": "2026-07-14T10:00:00.000Z"
},
{
"end": "2026-07-14T12:00:00.000Z",
"price_ct_kwh": "5.18",
"price_eur_mwh": 51.83,
"start": "2026-07-14T11:00:00.000Z"
},
{
"end": "2026-07-14T13:00:00.000Z",
"price_ct_kwh": "5.77",
"price_eur_mwh": 57.73,
"start": "2026-07-14T12:00:00.000Z"
},
{
"end": "2026-07-14T14:00:00.000Z",
"price_ct_kwh": "7.00",
"price_eur_mwh": 70,
"start": "2026-07-14T13:00:00.000Z"
},
{
"end": "2026-07-14T15:00:00.000Z",
"price_ct_kwh": "9.33",
"price_eur_mwh": 93.26,
"start": "2026-07-14T14:00:00.000Z"
},
{
"end": "2026-07-14T16:00:00.000Z",
"price_ct_kwh": "11.74",
"price_eur_mwh": 117.44,
"start": "2026-07-14T15:00:00.000Z"
},
{
"end": "2026-07-14T17:00:00.000Z",
"price_ct_kwh": "13.83",
"price_eur_mwh": 138.3,
"start": "2026-07-14T16:00:00.000Z"
},
{
"end": "2026-07-14T18:00:00.000Z",
"price_ct_kwh": "15.90",
"price_eur_mwh": 159.01,
"start": "2026-07-14T17:00:00.000Z"
},
{
"end": "2026-07-14T19:00:00.000Z",
"price_ct_kwh": "18.25",
"price_eur_mwh": 182.48,
"start": "2026-07-14T18:00:00.000Z"
},
{
"end": "2026-07-14T20:00:00.000Z",
"price_ct_kwh": "17.53",
"price_eur_mwh": 175.32,
"start": "2026-07-14T19:00:00.000Z"
},
{
"end": "2026-07-14T21:00:00.000Z",
"price_ct_kwh": "16.88",
"price_eur_mwh": 168.77,
"start": "2026-07-14T20:00:00.000Z"
},
{
"end": "2026-07-14T22:00:00.000Z",
"price_ct_kwh": "15.15",
"price_eur_mwh": 151.52,
"start": "2026-07-14T21:00:00.000Z"
}
],
"hours": 24,
"source": "EPEX DE/AT 24h forecast",
"stats_eur_mwh": {
"avg": "123.97",
"max": "182.48",
"min": "51.83",
"spread": "130.65"
},
"timestamp": "2026-07-13T22:51:10.252Z"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {},
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-11-02T14:57:27.235Z",
"quality": {
"l30DaysTotalCalls": 1,
"l30DaysUniquePayers": 1,
"lastCalledAt": "2026-11-02T14:57:26.835Z"
},
"resource": "https://energy.halowerk.com/price/forecast",
"serviceName": "HALOWERK Energy",
"tags": [
"compute-scheduling",
"depin-workloads",
"carbon-aware-compute",
"battery-dispatch",
"power-trading"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Energy-trading and flexible-load agents buy this endpoint to compare the next 24 hours of EPEX prices and volatility."
}What the leaf hashes
{"body":"6a42a5ee4cc75c1930a84eaf10561c4d223803d5d1f273a9023fc9549f362bd6","id":2199478,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646771651578,"prev":null,"subject":"x402_bazaar:https://energy.halowerk.com/price/forecast","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (444186 rows).
- 0xd3ab86c8bfe22871f44f230541b68b48c752b2be7c74e3f30108d874a7a6611e
- 0x29f5284cfb24c1c02102a375fcf43ed9dabea3ec477a7c286003922905e6471c
- 0x1dc68c4ed388ec46b45498274b91824c5458e58b4d9d486f3a3cd85dbd6f5287
- 0xd87dda138dfb455e37d9aaba9933fda61faac9fe648434adc0b4f0fe17da615f
- 0xcf5963ac79d142504807191f6365ea45c3ace5e5f04aa4363e2df6001b44c8c3
- 0x139bc9e2effd713f51d1af927040da98e1d6a4ef11ceb976056a311937ea8da7
- 0x4cd5a25cc04fa43ee08ce7826d3fcd8637b634e180a3bbde3cbdd059ca766e3e
- 0xcced9aeaaab430d6fab7ba263dcd545e92d78f7e31eec40166b448a046a740c4
- 0xb81d9f173c6fa11c82d67ae014296a15a061c4113335dff61c9126142eadf78f
- 0xe71d78f031a626686f37043a767a9d6bd82bcd521c33db8f7979854ef86e270e
- 0x932d9468b0d0eac06cbd63d890075420306d9296f5bb843b1595cb1cf8538a4a
- 0xb81130982c0a1978797ed8bd05b775797db9de4bc7447436735c39b33fac9eac
- 0x0ee251e21135d18ee3004d16c3618e1f970e8952654b422f2554f8aa0ae09b4f
- 0x0a363925e7ecbf308dcd4c5e94385984a43aafeb977e419f632e8dc2019e0553
- 0xa9134f4ed9cec34e13ba243b6a51db73753dbbb3b48c63bd82b22694813d2b02
- 0x7ddefa7d79e7640c3fed21ee4472689415182c41a0258ab04a81d60495f4c40a
- 0xdb8bd933619a267f9790faac9839143d202be46af284371cc369cdf683f897ba
- 0x98cbbf2c68ab4c0b4db782aeb88bea1f30b02178cf8b5d3d24a931d19492ea6d
- 0x252cce55f1a3d5391c16f82d7f62494429a5f69b03486d4cfcfb7b2c96d6c884
- Day root
- 0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1
- Chained
- 0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2
- Published
- On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af