← The evidence ledger
Evidence row 527769
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://data.spencermcw.com/v1/drug/nadac/search
- Recorded
- Previous row
- #453111
- Body SHA-256
- 769f92dbdef5acfbecd06a21900d7c9d092db7ec92bb5ab09d2acf263be84277
- Leaf
- 0x75f2a536c60469c47d94cf450fab23755f4071e1f609a60f46f0ca8c06297cc4
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": 3,
"l30DaysUniquePayers": 3,
"lastCalledAt": "2026-10-27T10:06:31.272Z"
},
"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":"769f92dbdef5acfbecd06a21900d7c9d092db7ec92bb5ab09d2acf263be84277","id":527769,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793124854635290,"prev":453111,"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).
- 0x75f30e1c2c14316b8cabc3df99b0c3d14c7ba1345db60a3048d777334a14f439
- 0x60dc38ccff0d0f34d0d5d56691b148b2770d14571302439610ac242d29528d45
- 0x549768e94f6c7f0a1dc7ac1e4fbb636476b7f9286e0f54cbf48e9711f7c8735d
- 0xdb9dddda8b72e74f0776bf3e093c5e11f29565908b7875298afabd8f0368e71b
- 0x55ca2e4aca16a8a35492489a91e501c75fc7fc393a5f0d8392fb30c30b40ba65
- 0xf4ed3dd4c1da9b1e80c46d58a22f948da3e3629564519d1a83ffb3bed87aeb99
- 0xf44239017f5660803154d60fe1877f21401b6dd9383010fde3d2ba963f4ed7fb
- 0x7a6b08815371fd0bdd4093700102779fbfee49ac720ae3e38b5a8d1b54c7784c
- 0x7d4479630a8500bbbb9f42dfe0d3c661525d6ae3f569be2a5eddfcb21f75eea4
- 0x58a21ad77eb0f12e2700138a011395f72f29a249b03b15df913625a0119d05d6
- 0x5f257f988f0c8c8a45a1094d99dd8e8969da325eabed8aa44c6b668fac04f073
- 0x6834d22f4558c2279e3de3027a40f72cd350b3c4a2e54be57aff9ec2c9eaf01a
- 0x4094bd5bc2ab60e4518d1ee8a13455a69d7484ea62ecdca2618d0f39d3403503
- 0x9848c068b1371232529d2b5738fdc45b854c57da041b69ea7c9e112b14e2d9d1
- 0x275720ecabb68df33eee92ae4fd70572a8d952d6c61c061c2869cfc3217aa5c5
- 0x23cf9bb4337ee8be7fcae368fd69d24c62c11fb45882127b4cd919bb96a19996
- 0x0e01aa9525097570a6edaf32bfc959de57bf5c24317cf10c0716affea85ca60d
- 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
- 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699
- Day root
- 0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795
- Chained
- 0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4
- Published
- On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4