← The evidence ledger
Evidence row 266170
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://serp402.com/api/v1/duck-ai
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 27c9ccaedd095fa5e9fcfe8356329fbec9d707a8fa07776750e524ff88f4934c
- Leaf
- 0xc6be34cd44e5cb44156831e0a287269b53c1a80a0b0329a9a8a86ec78e1ae1cb
What was observed
{
"endpoints": [
[
"x402",
"https://serp402.com/api/v1/duck-ai"
]
],
"name": "serp402",
"owner_address": "0xaa1252d726567293cffe6ca495e32c6aecfdc56d",
"raw": {
"accepts": [
{
"amount": "50000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 120,
"network": "eip155:8453",
"payTo": "0xAA1252D726567293cffE6Ca495e32c6AEcfDC56d",
"scheme": "exact"
},
{
"amount": "50000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP"
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "6srFz6v3mSUWBmz6Fx2XUaHQGHCNFJ59z85Cp9UDCvbK",
"scheme": "exact"
}
],
"description": "Duck AI: Duck AI results, returned as JSON. Structured JSON, USD 0.05 per call in USDC — no API key, no account, no subscription, no minimum. Not affiliated with, endorsed by or an official channel of any of the services the results come from. All trademarks and copyright remain the property of their respective owners.",
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"q": "where does coffee grow?"
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"endpoint": "duck-ai",
"meta": {
"latencyMs": 1400
}
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": true,
"properties": {
"model": {
"description": "AI model that answers the prompt. It can be set to: gpt-5.6-luna - GPT-5.6 Luna gpt-6-luna - GPT-6 Luna gpt-5.4-mini - GPT-5.4 mini claude-haiku-4-5 - Claude…",
"type": "string"
},
"q": {
"type": "string"
},
"subsequent_request_token": {
"description": "token used to continue a Duck AI conversation. Pass this token with a new q to send a follow-up prompt that includes the previous prompts and answers as…",
"type": "string"
}
},
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"additionalProperties": true,
"description": "Duck AI results as structured JSON. The shape follows the source, so fields differ between endpoints; identifiers and routing belonging to the collection layer are stripped.",
"properties": {
"attribution": {
"description": "Where the data comes from and what was done to it. Keep it with the results if you pass them on.",
"type": "object"
},
"endpoint": {
"description": "Which endpoint answered.",
"type": "string"
},
"meta": {
"description": "How long the call took.",
"type": "object"
},
"paid": {
"description": "The settled transaction and network.",
"type": "object"
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
},
"offer-receipt": {
"info": {
"offers": [
{
"acceptIndex": 0,
"format": "eip712",
"payload": {
"amount": "50000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"network": "eip155:8453",
"payTo": "0xAA1252D726567293cffE6Ca495e32c6AEcfDC56d",
"resourceUrl": "https://serp402.com/api/v1/duck-ai",
"scheme": "exact",
"validUntil": 1793028662,
"version": 1
},
"signature": "0x38d3e74ff5d34feb40f1820922d4624c3134c59ecc39aa5de04fb97a77f494496d0fa2aab0f6242a605399bae75d7b2b0207b9210593af61ff4a1048523f4d491c"
},
{
"acceptIndex": 1,
"format": "eip712",
"payload": {
"amount": "50000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "6srFz6v3mSUWBmz6Fx2XUaHQGHCNFJ59z85Cp9UDCvbK",
"resourceUrl": "https://serp402.com/api/v1/duck-ai",
"scheme": "exact",
"validUntil": 1793028662,
"version": 1
},
"signature": "0x945c343efb1c619083e37eff81486b840f84e936c2b82ef28a9b91c7e8c296df71aca8fc6dad4c05338207f8de49973303016ec5e2b1808640c4bf14c168fc981b"
}
]
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"offers": {
"items": {
"properties": {
"acceptIndex": {
"type": "integer"
},
"format": {
"type": "string"
},
"payload": {
"properties": {
"amount": {
"type": "string"
},
"asset": {
"type": "string"
},
"network": {
"type": "string"
},
"payTo": {
"type": "string"
},
"resourceUrl": {
"type": "string"
},
"scheme": {
"type": "string"
},
"validUntil": {
"type": "integer"
},
"version": {
"type": "integer"
}
},
"required": [
"version",
"resourceUrl",
"scheme",
"network",
"asset",
"payTo",
"amount"
],
"type": "object"
},
"signature": {
"type": "string"
}
},
"required": [
"format",
"signature"
],
"type": "object"
},
"type": "array"
}
},
"required": [
"offers"
],
"type": "object"
}
}
},
"lastUpdated": "2026-10-26T15:29:02.023Z",
"quality": {
"lastCalledAt": "2026-10-26T15:29:02.023Z"
},
"resource": "https://serp402.com/api/v1/duck-ai",
"serviceName": "serp402",
"tags": [
"ai",
"duck",
"x402",
"agents",
"api"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Duck AI: Duck AI results, returned as JSON. Structured JSON, USD 0.05 per call in USDC — no API key, no account, no subscription, no minimum. Not affiliated with, endorsed by or an official channel of any of the services the results come from. All trademarks and copyright remain the property of their respective owners."
}What the leaf hashes
{"body":"27c9ccaedd095fa5e9fcfe8356329fbec9d707a8fa07776750e524ff88f4934c","id":266170,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793035109423688,"prev":null,"subject":"x402_bazaar:https://serp402.com/api/v1/duck-ai","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).
- 0xc6be38ed1489a6a5b88db9bc2bd9155200507d37ad8b4f52ae71da05ee78f1ab
- 0xd703609fb8745e6c58d5d82f95d9653ec7fc301dbc4b33b78c888d4145d89cae
- 0x09943583de5b9056358d0c1cc4fdaaf29ad0bf6cc1e40d0650a628fdc90c48f6
- 0xc865216e8fe270a07ca2a33ffbdbc0155fe28f6fec74a36aaf0b9a3cfdf34db9
- 0x458777f2b212d1ec3e22f4d1c2457085557e0f70e31a6f91c7b48d1b70f75693
- 0x73ec85ef9bbb4d1add962b3d26681bbdf850e797aad9667eaa555edf03fc489a
- 0x49c7ee142c202fb051a0e5a21bf913914771b7602430500eca13394df823d244
- 0x821196ecfc91b1f56fc027ce088587a8aaa170d1ed224c9e59a828960f52b0fe
- 0xcbd20ca8a5a9e5e61234e3bec18f76c373018d9ee1d145906aef0eebe99017a3
- 0xa5d93de518cc5a3e0fcb59e9d61337c743409d708b23c5352bebbbec973ca249
- 0xcf79908a8c2a5f4d274583b3f75e7aa2d8b29ffc384541425852fe761ae31d56
- 0x9d99c5dad23613921cdfabc849c2dd3c97729992eaa05c4dab5e86e83ed6d220
- 0x72e35aac89ebca631656c2b1aecbdc094807d9807f12c22a6ddf35cc1f5e21d6
- 0x5b20d8aab05225a3497eadcce89d2e2a586a510fb31334793d3f46f88f0157c5
- 0xe94ca5b798e9899ad611e57835af42266e20f53f44977e487d81365e30972beb
- 0x703f95866af09c5e5d6ead7411e9a10f964a41a2aff64d4a55ff0053c023a023
- 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
- 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae