← The evidence ledger
Evidence row 257488
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://serp402.com/api/v1/duckduckgo-search
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 28b5d27df04be694fcd1875ba02c3652eaa5fe83c31e645db21bbbbf83043790
- Leaf
- 0x6abdc4682e6cbedd261a5e9907d53e1a5e2d6c9214b839049d1d0913b0ff9afc
What was observed
{
"endpoints": [
[
"x402",
"https://serp402.com/api/v1/duckduckgo-search"
]
],
"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": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88"
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "6srFz6v3mSUWBmz6Fx2XUaHQGHCNFJ59z85Cp9UDCvbK",
"scheme": "exact"
}
],
"description": "DuckDuckGo: Scrape DuckDuckGo search results in JSON format automatically, using custom parameters. 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": {
"kl": "us-en",
"q": "Apple"
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"endpoint": "duckduckgo-search",
"meta": {
"latencyMs": 1400
}
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": true,
"properties": {
"df": {
"description": "results filtered by date. It can be set to: d : Past day, w : Past week, m : Past month, y : Past year, or you can pass a custom date following the next…",
"type": "string"
},
"kl": {
"description": "region to use for the DuckDuckGo search. Region code examples: us-en for the United States, uk-en for United Kingdom, or fr-fr for France. Head to the…",
"type": "string"
},
"q": {
"type": "string"
},
"safe": {
"description": "level of filtering for adult content. It can be set to 1 (Strict), -1 (Moderate - default), or -2 (Off).",
"type": "string"
},
"search_assist": {
"description": "Parameter determines if DuckDuckGo's AI Search Assist will be returned in the response. It can be set to true or false (default). search_assist and m can't be…",
"type": "string"
},
"start": {
"description": "result offset. It skips the given number of results. When offset is not being used (initial search request, start parameter is set to 0 or left blank), up to…",
"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": "DuckDuckGo 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/duckduckgo-search",
"scheme": "exact",
"validUntil": 1793029547,
"version": 1
},
"signature": "0xdef70f1c0ed5c001d7a248c8fb1b15a77286c6605c8ce4a605246f771ee001a911840b556c575c9a8289df22626726ac272c7a1ea1b962c47073a327f17d86671b"
},
{
"acceptIndex": 1,
"format": "eip712",
"payload": {
"amount": "50000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "6srFz6v3mSUWBmz6Fx2XUaHQGHCNFJ59z85Cp9UDCvbK",
"resourceUrl": "https://serp402.com/api/v1/duckduckgo-search",
"scheme": "exact",
"validUntil": 1793029547,
"version": 1
},
"signature": "0xd9b1e2cf0d612fc7bd6f579ffe2706594ef36c3d1e3ffc76875458ea64a48c5f46b6e006b480d63f5877566cac00eee3e9ccd68db7e0d0d5655da6eb6ba79e451c"
}
]
},
"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": "2026-10-26T15:43:47.543Z",
"quality": {
"lastCalledAt": "2026-10-26T15:29:20.355Z"
},
"resource": "https://serp402.com/api/v1/duckduckgo-search",
"serviceName": "serp402",
"tags": [
"search",
"duckduckgo",
"x402",
"agents",
"api"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "DuckDuckGo: Scrape DuckDuckGo search results in JSON format automatically, using custom parameters. 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":"28b5d27df04be694fcd1875ba02c3652eaa5fe83c31e645db21bbbbf83043790","id":257488,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793029765495307,"prev":null,"subject":"x402_bazaar:https://serp402.com/api/v1/duckduckgo-search","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).
- 0x6abd9c56cb2c60c6036ee2cd49b3444ef74d3b3465ae538829c7c272bb9ffc88
- 0x09c96f51904c42fae7bbd9277c2320d16304bf6db78f206bb27d301eb6aaffaa
- 0x47a10c881f85542041a9afe9b999c74daf3816ce0c1dab18093d4ed032cf9d02
- 0xc64a60b38e3ecec67ea3b806be55a02ebb8e27dd4a0b0e1547346ee4018feefb
- 0x1ef8d606870d7b601a8771e41a53bb0c7b7638eac882f8fb8b0151098dcb1eb8
- 0x47a133623716b50d7655e22ee8855f010a343dfc5ef61a4ba581573b5c9e9e62
- 0x7a8b886db547bcbe1392df86df5bac6af0c37491695c3c5197cb200edaeb826c
- 0x6650882cf02ae10978cfae702e87a7a2beb270205596c0c276548350adcefbf4
- 0xc683c19105f4cd9fe98d7ee6c7686e30fad932ca0f684c513388993692f12470
- 0x38d2c463ef7581c583f8ede8c591808370e469ec2c5f3189710e20b16d13dd8f
- 0x435232f3fd6b83e88220d17343494fe854d4ecf8a9148117c288f679edde404b
- 0x2a304c51963b65e3ca818b638b2e9a98297b7d6b6a3e14ecca2501aa13b9f556
- 0x9dc4d6f64bc3c323d2c45a28209068cd473b6979bd632a0d694bf94d19bc39df
- 0xfc9b5a81a7a83a1c735a4fe64590beb9db14d2366f463161358af28c3ea9a81d
- 0xa2d436d488e3600b0e5c3e3ed9c9234cd52853c59830b786334fd0c4292d9f40
- 0x47b89901b0f07938a6b9a66ddf35683903f79d756a7c7763665fd632758b08d0
- 0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
- 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae