← The evidence ledger
Evidence row 1532336
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://kronossignals.com/api/v1/price/eth
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 65b16d9be838d890fef7eca3533123459747a3106f1e8add109ce362f2409cd6
- Leaf
- 0xcfead7e827cb629fba1aff4c4a96cdfc7024be11125f16fc89baaf09f3091008
What was observed
{
"endpoints": [
[
"x402",
"https://kronossignals.com/api/v1/price/eth"
]
],
"name": "Kronos Crypto Data & Forecasts",
"owner_address": "0x36038e1d712c5e39f35952164ec58ec2b96caee7",
"raw": {
"accepts": [
{
"amount": "20000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0x36038e1d712c5e39f35952164ec58ec2b96caee7",
"scheme": "exact"
}
],
"description": "Spot price for 16 crypto assets (BTC/ETH/SOL/BNB/XRP/DOGE/ADA/AVAX/LINK/DOT/LTC/TRX/BCH/ATOM/NEAR/APT) as a volume-weighted median across Binance, Coinbase, Kraken and OKX (2 s timeout per source): 1% outlier rejection, cross-exchange spread %, a confidence grade (high/medium/low) and per-source volume weights. A reference price, not a single-venue ticker. Optional coins= batches up to 10 symbols per call. $0.02 USDC via x402.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {},
"type": "http"
},
"output": {
"example": {
"as_of": "2026-01-01T00:00:00.000Z",
"asset": "BTC-USD",
"confidence": "high",
"cross_exchange_spread_pct": 0.08,
"data_age_seconds": 0,
"disclaimer": "Volume-weighted median price from up to 4 exchanges. Informational only, not financial advice.",
"outliers_rejected": 0,
"price": 107500,
"price_simple_median": 107480,
"sources": [
{
"exchange": "binance",
"included": true,
"price": 107510,
"vol_weight": 0.45,
"volume": 1200000000
},
{
"exchange": "coinbase",
"included": true,
"price": 107490,
"vol_weight": 0.3,
"volume": 800000000
},
{
"exchange": "kraken",
"included": true,
"price": 107500,
"vol_weight": 0.15,
"volume": 400000000
},
{
"exchange": "okx",
"included": true,
"price": 107480,
"vol_weight": 0.1,
"volume": 270000000
}
]
},
"example_kind": "illustrative_schema_only",
"example_note": "Placeholder values and timestamps, not market data.",
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {},
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-10-31T18:48:12.093Z",
"quality": {
"lastCalledAt": "2026-10-31T18:48:12.093Z"
},
"resource": "https://kronossignals.com/api/v1/price/eth",
"serviceName": "Kronos Crypto Data & Forecasts",
"tags": [
"bitcoin",
"btc",
"ethereum",
"solana",
"crypto"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Spot price for 16 crypto assets (BTC/ETH/SOL/BNB/XRP/DOGE/ADA/AVAX/LINK/DOT/LTC/TRX/BCH/ATOM/NEAR/APT) as a volume-weighted median across Binance, Coinbase, Kraken and OKX (2 s timeout per source): 1% outlier rejection, cross-exchange spread %, a confidence grade (high/medium/low) and per-source volume weights. A reference price, not a single-venue ticker. Optional coins= batches up to 10 symbols per call. $0.02 USDC via x402."
}What the leaf hashes
{"body":"65b16d9be838d890fef7eca3533123459747a3106f1e8add109ce362f2409cd6","id":1532336,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793473476303097,"prev":null,"subject":"x402_bazaar:https://kronossignals.com/api/v1/price/eth","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (246033 rows).
- 0xcfeb8b19b846bac717f44050c6b4d315888eea271a21236a16e5c6fa3ae0a1f1
- 0x64144cbfdbf25f4389235df9b8f07b8cbedcbe80aeb9c04f955883da3e08e285
- 0xf0e3c4742bc291eb71d9d8fb518448256e247307a9695e55cc98282f967db2a2
- 0xd366f9c2f12c5007c2c616b5202358b34c2176982cd264199afc3b841f7685af
- 0xa5c7a15b91a92402d1f5cec53ec987896a270622c8325496d9a947973b6e9acc
- 0xa5de9199b67593bbe6d0245434090ec19cd06d627151e9753434f399bb0df420
- 0xdef4d9b953a31f123921bd4f84df4a82ffcbaa72a44707c6047c8a4a86e4fdb5
- 0x22498832ed0c081884ef61bbedef4b3c7cd4ca57c1f141871074f95d5d962e41
- 0x62a2c0b8b73c4b45146cf1264823b9a6812fdfb2a2e113964fab8f3784815c62
- 0xeedc4c1115bdd80b45a6800af9992d25d62f17fcbbae6932c9f1d36967de1d16
- 0x85330b5faa14019d4dcf57a10b9b4edfe7f6af2e1b69f202244bd89bc3c0c142
- 0xba868b2f1cd63acc426cbe69b330be28a71a278a86a64bc4049a67caba3b7373
- 0x879ea14b1df50a9eb1b0b6c572c1b9a9c8ea03779d4e7040c5836848130f41fc
- 0x0914258a3cd32c99db9301b59460f511f2cae6747f3045a418ce9caa1edb7ef9
- 0xad3f03d7f9e1b66264ddfca29446faf13bc0fee7d8eec5f018d0d45302d3f8fd
- 0x24f03354dcb3a621317889ed99048bdf74b380516ca991bfb585c751d5cc7dfd
- 0xa1146af524f673843507e7427a575964580eef01bc0e0eae466a7920df017ab2
- 0x0504a25438f3c7932125463198ca74c5064f23f71a5c92763b3fc96a98cc8b57
- Day root
- 0x24463725d1c0d9894bd6123691d532547aaa79f0762c0e45aa6a68acf1fd71ab
- Chained
- 0x7d4824ff313dee7252a46f9d5c37b452851deb6c9f24a40c2f74ee0e53c82980
- Published
- On Arc Testnet, block 70093156: 0xedb7b832f4ebf6781b5ecd2ed241c435b862f4d3761541fa31adc1831b8c44a0