← The evidence ledger
Evidence row 69871
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://api.vextorium.com/v1/keywords
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- da3614fde666fac4b9e66005c37a2c88bf4f5f8d0fb2e5282977ce1587ff4842
- Leaf
- 0x156051811e2ef381487c657263bd2f437e1552276ac7084253c776ec0a359687
What was observed
{
"endpoints": [
[
"x402",
"https://api.vextorium.com/v1/keywords"
]
],
"name": "AI keyword extraction",
"owner_address": "0xb9f06d2734b7e9d7b21b64c4d8b95bd774b71acf",
"raw": {
"accepts": [
{
"amount": "3000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0xb9f06D2734B7E9D7b21B64C4D8b95bd774b71aCf",
"scheme": "exact"
},
{
"amount": "3000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb"
},
"maxTimeoutSeconds": 300,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "HcjfmZLgWRZzwj4deEiS7pewc4KBYSw39mW5nTyt3pz2",
"scheme": "exact"
},
{
"amount": "3000",
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:137",
"payTo": "0xb9f06D2734B7E9D7b21B64C4D8b95bd774b71aCf",
"scheme": "exact"
},
{
"amount": "3000",
"asset": "0x0b2C639c533813f4Aa9D7837CAf62653d097Ff85",
"extra": {
"assets": [
{
"address": "0x0b2c639c533813f4aa9d7837caf62653d097ff85",
"authorizationVersions": [
"1",
"2"
],
"decimals": 6,
"symbol": "USDC"
}
],
"minValiditySeconds": 604800,
"name": "GatewayWalletBatched",
"verifyingContract": "0x77777777dcc4d5a8b6e418fd04d8997ef11000ee",
"version": "1"
},
"maxTimeoutSeconds": 604900,
"network": "eip155:10",
"payTo": "0xb9f06D2734B7E9D7b21B64C4D8b95bd774b71aCf",
"scheme": "exact"
},
{
"amount": "3000",
"asset": "0x3600000000000000000000000000000000000000",
"extra": {
"assets": [
{
"address": "0x3600000000000000000000000000000000000000",
"authorizationVersions": [
"1",
"2"
],
"decimals": 6,
"symbol": "USDC"
}
],
"minValiditySeconds": 604800,
"name": "GatewayWalletBatched",
"verifyingContract": "0x77777777dcc4d5a8b6e418fd04d8997ef11000ee",
"version": "1"
},
"maxTimeoutSeconds": 604900,
"network": "eip155:5042",
"payTo": "0xb9f06D2734B7E9D7b21B64C4D8b95bd774b71aCf",
"scheme": "exact"
},
{
"amount": "0.003",
"asset": "524C555344000000000000000000000000000000",
"extra": {
"areFeesSponsored": false,
"invoiceId": "8AA423D0B25A49F2A0F25F66627C1843",
"issuer": "rMxCKbEDwqr76QuheSUMdEGf4B9xJ8m5De",
"sourceTag": 804681468
},
"maxTimeoutSeconds": 300,
"network": "xrpl:0",
"payTo": "rEac5rTEr7y81iEyrMTrHCRbnktSE2pNCp",
"scheme": "exact"
},
{
"amount": "2310",
"asset": "XRP",
"extra": {
"areFeesSponsored": false,
"invoiceId": "D22647A771E54AE28423E6816F362A46",
"sourceTag": 804681468
},
"maxTimeoutSeconds": 300,
"network": "xrpl:0",
"payTo": "rEac5rTEr7y81iEyrMTrHCRbnktSE2pNCp",
"scheme": "exact"
}
],
"description": "Extract keywords and keyphrases from a text without AI (RAKE algorithm scoring frequency and degree), in Spanish or English, plus most frequent words. For tagging, indexing and SEO.",
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"limit": 5,
"text": "Artificial intelligence agents are transforming the digital economy. AI agents pay for data with micropayments. The x402 protocol lets agents pay per call without accounts. Many companies already offer pay-per-use APIs for agents. USDC micropayments make this business model viable."
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"frequent_words": [
{
"times": 3,
"word": "agents"
},
{
"times": 2,
"word": "micropayments"
}
],
"key_sentences": [
{
"score": 9,
"sentence": "business model viable",
"times": 1
},
{
"score": 8,
"sentence": "usdc micropayments make",
"times": 1
}
],
"language": "en"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"limit": {
"type": "integer"
},
"text": {
"type": "string"
}
},
"required": [
"text"
]
},
"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": {
"properties": {
"frequent_words": {
"items": {
"properties": {
"times": {
"type": [
"null",
"number"
]
},
"word": {
"type": [
"null",
"string"
]
}
},
"type": [
"null",
"object"
]
},
"type": [
"array",
"null"
]
},
"key_sentences": {
"items": {
"properties": {
"score": {
"type": [
"null",
"number"
]
},
"sentence": {
"type": [
"null",
"string"
]
},
"times": {
"type": [
"null",
"number"
]
}
},
"type": [
"null",
"object"
]
},
"type": [
"array",
"null"
]
},
"language": {
"type": [
"string",
"null"
]
}
},
"type": [
"object",
"null"
]
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-10-20T18:08:16.073Z",
"quality": {
"l30DaysTotalCalls": 6,
"l30DaysUniquePayers": 5,
"lastCalledAt": "2026-10-20T18:08:15.589Z"
},
"resource": "https://api.vextorium.com/v1/keywords",
"serviceName": "AI keyword extraction",
"tags": [
"keywords",
"nlp",
"seo",
"tagging",
"rake"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Extract keywords and keyphrases from a text without AI (RAKE algorithm scoring frequency and degree), in Spanish or English, plus most frequent words. For tagging, indexing and SEO."
}What the leaf hashes
{"body":"da3614fde666fac4b9e66005c37a2c88bf4f5f8d0fb2e5282977ce1587ff4842","id":69871,"kind":"listing","method":"baseline/1","observed_us":1793025479085817,"prev":null,"subject":"x402_bazaar:https://api.vextorium.com/v1/keywords","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).
- 0x156012b9987580872f1d45ac6eb44955490bdaa6abb8e317ea33a3d76191293c
- 0xd408d8aa37e05713436c2df1e3ae1bdd320f45a79213710e3aa9be3459649734
- 0x7846023166afc3a4fda854d6ce11d9cea9372809981de69b61d03b89becd1d97
- 0x6bf04d5d406d2c00fea5780d1e3a69484a95f82ed2322efce9322e2f470d6a24
- 0x02581771657edc1e1e298427509ba4d6ca0ef60cfeb469354fa15ec4740f1a79
- 0x75144ad8ab6697059eea05d67aa7aa2802c8f11fd10e98ff3df0ce10cc4f9444
- 0x6e6cff11bbbf648bd2b61d1d0329854b2df2ab5beeb5986a77378a80acfe99e8
- 0x5e3d0fc793909dcd17d3954f61c2267244dbb58307c4038412b5560308363f21
- 0x797f34f7e2fd34b2f69435d539960cab8f5c7cd17e1f5b0b2d9b2f39137d523a
- 0x62971446cc50312a1295d5bf772913e17639cbd732dd41883c8dea522d4637e8
- 0xb5d5212c69fb335bad2409aa4a0da0469cc6cc62939ca82d5235005f3b154a2b
- 0x2412cb8bc4d10d94e1eb907d5058dd12133e55416609e1b314e811af76620542
- 0xff1c28bdf595a3d1333e9915edc68e9c5fded7bd5923fa85870979af34cbc3b3
- 0xb49e8c2564256e5322e375cb619d9ac70fd17c1d1eba9c991bba4cb6428f45cc
- 0x60582ab4b41e72eb70eb0bce07fbf0fb4d2b62a8bad5be50f5d16d511adc746c
- 0xc6a4d7899a0f442958e26505011190b7cff2483611c1b94eba9043e0ba9ac36e
- 0x8c756542e482157df0c36464d75c937b845e4423dbbcfad08f0cf8d5a16b9a13
- 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae