← The evidence ledger
Evidence row 453111
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://data.spencermcw.com/v1/drug/nadac/search
- Recorded
- Previous row
- #73180
- Body SHA-256
- d7405d378242fdb9beff6d0c2bfb85dbf13e99f46fb6bc769eb927d2e05fce32
- Leaf
- 0xbce7077caa6329dc7cef33f8cedef9311f1abe78aaca72a7a2c68806eebf7b29
What was observed
{
"endpoints": [
[
"x402",
"https://data.spencermcw.com/v1/drug/nadac/search"
]
],
"name": "data.spencermcw.com/v1/drug/nadac/search",
"owner_address": "0xe6900ae625875b748f56fb45c3e06a59be8870df",
"raw": {
"accepts": [
{
"amount": "10000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0xE6900aE625875b748f56Fb45C3e06a59Be8870DF",
"scheme": "exact"
}
],
"description": "Which NDCs match this drug name, and what do pharmacies pay for them? NADAC search by name (e.g. “atorvastatin 40”) with NDC counts and current per-unit cost ranges, from CMS’s weekly NADAC file. Updated weekly. $0.01 per call (x402, USDC on Base); 3 free calls a day.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"name": "atorvastatin 40"
},
"type": "http"
},
"output": {
"example": {
"data": {
"as_of": "2026-10-21",
"matches": [
{
"classification": "G",
"description": "ATORVASTATIN 40 MG TABLET",
"effective_date": "2026-10-21",
"nadac_per_unit": {
"max": "0.03688",
"min": "0.03688"
},
"ndcs": 69,
"pricing_unit": "EA",
"sample_ndcs": [
"00093505810",
"00093505898",
"00378395205",
"00378395277",
"00480358710"
]
}
],
"query": "atorvastatin 40"
}
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"limit": {
"maximum": 25,
"minimum": 1,
"type": "integer"
},
"name": {
"maxLength": 80,
"minLength": 2,
"type": "string"
}
},
"required": [
"name"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"data": {
"additionalProperties": false,
"properties": {
"as_of": {
"type": "string"
},
"matches": {
"items": {
"additionalProperties": false,
"properties": {
"classification": {
"type": "string"
},
"description": {
"type": "string"
},
"effective_date": {
"type": "string"
},
"nadac_per_unit": {
"additionalProperties": false,
"properties": {
"max": {
"type": "string"
},
"min": {
"type": "string"
}
},
"required": [
"min",
"max"
],
"type": "object"
},
"ndcs": {
"maximum": 9007199254740991,
"minimum": -9007199254740991,
"type": "integer"
},
"pricing_unit": {
"type": "string"
},
"sample_ndcs": {
"items": {
"type": "string"
},
"type": "array"
}
},
"required": [
"description",
"pricing_unit",
"classification",
"ndcs",
"nadac_per_unit",
"effective_date",
"sample_ndcs"
],
"type": "object"
},
"type": "array"
},
"query": {
"type": "string"
}
},
"required": [
"query",
"as_of",
"matches"
],
"type": "object"
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-10-27T10:06:31.472Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-10-23T04:28:07.25Z"
},
"resource": "https://data.spencermcw.com/v1/drug/nadac/search",
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Which NDCs match this drug name, and what do pharmacies pay for them? NADAC search by name (e.g. “atorvastatin 40”) with NDC counts and current per-unit cost ranges, from CMS’s weekly NADAC file. Updated weekly. $0.01 per call (x402, USDC on Base); 3 free calls a day."
}What the leaf hashes
{"body":"d7405d378242fdb9beff6d0c2bfb85dbf13e99f46fb6bc769eb927d2e05fce32","id":453111,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793100597761779,"prev":73180,"subject":"x402_bazaar:https://data.spencermcw.com/v1/drug/nadac/search","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (273461 rows).
- 0xbce67ce4849ce3f0c9f802ffaaddc37cf12e32f81421a7df18f5d51630086eb8
- 0x666c800e810a3352be1048acb693e0762aeab5bcabf35887f83165f6ff9ff92b
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- 0x979c9049de1dfccf6dd639a334931d0ee3747b6b2253aa87367e52b4ef256fd0
- 0xea34ccd79caf015004e15046092f514d6c06e69923db167104b26bd92aea23e6
- 0xa356d010114b9f4c7442ae37b1446ed64668e55b6fe85aea6c7507adf756e555
- 0x6b39ec5d1b3b961022c173653f4e7ebe422d8628446bd52f6d3f2bfe088a1730
- 0xa7cf24d58c2aac712161048370061e1e59c373a587fa55d774689794d68a93f9
- 0x11863cf7e757a1d12fbcfa78e5d9b653afacc5d0c003d14c0dbc347522d43227
- 0xe37bb054ee8eabeb3574167bc5f618198cf3f58380eeae8ee81407fce4747d2d
- 0x0b996890ad9f7a45291a56249c03de765fb331d173fb8d8e01ab2ec842ac8316
- 0x92804c1cd4f73221d350049c90c3d17d86ce815c332f3b67c5894d2919efebf2
- 0xb4800af1fe2ae822adba5c087faf1dc0bc2d7c9de2e3e602a2b65aefc1d53c94
- 0xa453d1738637a5c663802d07ce095aa340c80d53a4288ae277a72e265868ce4e
- 0x73341bb09dd901ca47f26173883431496e3d98d6b0fb5b89f36218126d46c5d4
- 0xa94627de1af0e823832e05a9069b304ecccb8c0cdb8f9cfc4f2039bfb9799dc5
- 0xdf1105afdc109de3c09a98fc8a3864159ad964e6f49b635c105a27a1e1f14310
- 0x2bf8151e5f157dd183b9de6fa00469551932a7a6e3f33a694895000ac9061197
- 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699
- Day root
- 0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795
- Chained
- 0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4
- Published
- On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4