← The evidence ledger
Evidence row 1038855
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://freetier-agent-api.pages.dev/api/base-gas
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 2f8ca7f04d4df1beb9488c07fb1d34e897dd409929a25138bfa9fcfab7fcdfad
- Leaf
- 0x92f07bbc216d587d5c0890b164eb6152c79c922d3da7db322d275de99832e40c
What was observed
{
"endpoints": [
[
"x402",
"https://freetier-agent-api.pages.dev/api/base-gas"
]
],
"name": "Agent Extraction API",
"owner_address": "0x165eb3dc3e98403ecb1141e90400f5e71806554b",
"raw": {
"accepts": [
{
"amount": "1500",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0x165Eb3dC3E98403ecB1141e90400F5e71806554B",
"scheme": "exact"
}
],
"description": "Live Base mainnet gas price (gwei), latest block, and estimated ETH cost of a USDC transfer (~65k gas) and a plain ETH transfer (21k gas).",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {},
"type": "http"
},
"output": {
"example": {
"at": "2026-10-24T18:11:05.049Z",
"block": 53038058,
"eth_transfer_eth": 1.26e-7,
"gas_price_gwei": 0.006,
"gas_price_wei": 6000000,
"network": "Base mainnet (chain 8453)",
"note": "L2 execution gas only; Base also charges a small L1 data fee per tx. x402 payments via a facilitator are gas-free for the payer.",
"rpc": "https://mainnet.base.org",
"sources": [
{
"name": "Base mainnet public RPC (live)",
"url": "https://mainnet.base.org"
}
],
"usdc_transfer_eth": 3.9e-7,
"usdc_transfer_gas_estimate": 65000
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {},
"required": [],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"at": {
"type": [
"string",
"null"
]
},
"block": {
"type": [
"number",
"null"
]
},
"eth_transfer_eth": {
"type": [
"number",
"null"
]
},
"gas_price_gwei": {
"type": [
"number",
"null"
]
},
"gas_price_wei": {
"type": [
"number",
"null"
]
},
"network": {
"type": [
"string",
"null"
]
},
"note": {
"type": [
"string",
"null"
]
},
"rpc": {
"type": [
"string",
"null"
]
},
"sources": {
"items": {
"type": [
"object",
"null"
]
},
"type": "array"
},
"usdc_transfer_eth": {
"type": [
"number",
"null"
]
},
"usdc_transfer_gas_estimate": {
"type": [
"number",
"null"
]
}
},
"type": "object"
},
"type": {
"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/v1793252197/bazaar-icons/19906174df41ffa4.png",
"lastUpdated": "2026-10-29T07:52:18.283Z",
"quality": {
"l30DaysTotalCalls": 1,
"l30DaysUniquePayers": 1,
"lastCalledAt": "2026-10-29T07:52:17.694Z"
},
"resource": "https://freetier-agent-api.pages.dev/api/base-gas",
"serviceName": "Agent Extraction API",
"tags": [
"crypto",
"base",
"gas"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Live Base mainnet gas price (gwei), latest block, and estimated ETH cost of a USDC transfer (~65k gas) and a plain ETH transfer (21k gas)."
}What the leaf hashes
{"body":"2f8ca7f04d4df1beb9488c07fb1d34e897dd409929a25138bfa9fcfab7fcdfad","id":1038855,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793298276312222,"prev":null,"subject":"x402_bazaar:https://freetier-agent-api.pages.dev/api/base-gas","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (242798 rows).
- 0x92f0828366df0f06ad489e88fb7c9163552625defc9242ba947d5a1f9e4b0259
- 0x157fc9e2687ced5aa03c6f241de3cb33e87adc3fcf0a0253374e374998199dd2
- 0x096d0ff6778d4889e43b030e631941c71ebcce46f7c3bbd69b29eeba68bfd344
- 0x033ba50ece21e4561c97c59af95a5e7fadb0faf3ac44df2df8c66d0ae3085747
- 0x929a436724df693b263edde95b8639f40112fc9d403ab5d043232554341286f4
- 0x4790527e04ec738d98875374b233edec3bf5b5298b987a87ce43a702750dd283
- 0x2e1858c36b627b254091a581d50f4040fe3fe4eb7bc103ec83b6170e0984bc84
- 0x0c31b7ea7b27082a399c27a377add8f5c8dcc62b2352f7ca648bdb96672b4625
- 0xbbb434831d82077df82c87098c8bb2d92dee25d5b7a33df6b336ba77f4c1b928
- 0x39650e9f8fed459f187622d6b386ca6942390bab712702ff3dc2e7c349e71435
- 0xc12ef8865ab073952a94b5274c5141749a1cb7c1b8fdfe9f95a38a4cdeba6ce2
- 0xb628b468191eaef8486d0e0260826fbead255c817f95ea83943e285737a87d22
- 0x834e0aae5de1c77f23e901b21cc37833f72279146f0a5e458548b82d6bed2b7a
- 0x2ec9677def553f2064a7e34081a129a91f7999a429ef2705c4c539a9602f3bbf
- 0x09d5ec1c01b0f087fe9f6cc95432188552da9adc88004aed57401ea49f2b56d4
- 0xe38dc587bc010668982bd78025ac33d7326ffc2587f2de00e848da2718907ecf
- 0xa1fa2e97e71ad6e802f325afd74bb7095901f2060529c9739182a1233f8804bc
- 0xe01539ac4c9f9cdf265a9e5c6d99c8da11e70ff0c7175fb23e402d33b9d79785
- Day root
- 0xc050555c6b023f2aefb6536efb9f0760b92c30a0d06c572b7daf63db259ea17c
- Chained
- 0x4cde8bae2042512e1bec11650628f0293556311cc4ea74d99ffddf02b671a7d6
- Published
- On Arc Testnet, block 69753317: 0x9e85c340732f416e431b111fae72f7624870125f7f379af2732eb6c2ba8cf6a1