← The evidence ledger
Evidence row 2201415
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://nohands-coinbase-bazaar.bytoken2023.workers.dev/x402/v1/value/usdc-twd
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- b79f03f763116d3faf31b68e2bdd5e8665c0c26681c505ca893db2bc92f397c7
- Leaf
- 0x22d80db0dace53cfcfb06e0b5d0fbdfa0f83500c54f44eaf160a47de62a77253
What was observed
{
"endpoints": [
[
"x402",
"https://nohands-coinbase-bazaar.bytoken2023.workers.dev/x402/v1/value/usdc-twd"
]
],
"name": "NO HANDS AI",
"owner_address": "0x94f751f04b98507d31b500b7ed50be68a1514873",
"raw": {
"accepts": [
{
"amount": "1001",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"assetTransferMethod": "eip3009",
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0x94F751f04b98507D31b500b7Ed50bE68A1514873",
"scheme": "exact"
}
],
"description": "Return a source-backed live USDC to TWD composite quote for autonomous-agent budget checks.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"amount": "1"
},
"type": "http"
},
"output": {
"example": {
"amount": "1",
"asset": "USDC",
"converted_value": "1.00",
"crypto_source": {
"fetched_at": "2026-07-24T00:00:00.000Z",
"freshness_seconds": 0,
"leg": "crypto_usd",
"market": "USDC/USD",
"observation_type": "recent_trade",
"observed_at": "2026-07-24T00:00:00.000Z",
"pair": "USDCUSD",
"provider": "Kraken",
"provider_role": "primary",
"timestamp_origin": "exchange_trade_time",
"value": "1.00000000",
"venue": "Kraken Spot"
},
"fallback_reason": null,
"fallback_used": false,
"freshness_seconds": 0,
"fx_source": {
"fetched_at": "2026-07-24T00:00:00.000Z",
"freshness_seconds": 0,
"leg": "usd_twd",
"market": "USD/TWD",
"observation_type": "fx_rate",
"observed_at": "2026-07-24T00:00:00.000Z",
"pair": "USD/TWD",
"provider": "fxapi.app",
"provider_role": "fx_reference",
"timestamp_origin": "fx_provider_timestamp",
"value": "1.000000",
"venue": "FX reference"
},
"market_status": "fresh",
"product": "nomos-value-usdc-twd",
"provider": "Kraken + fxapi.app",
"provider_role": "primary",
"quote_currency": "TWD",
"quote_type": "live",
"response_generated_at": "2026-07-24T00:00:00.000Z",
"result_id": "val_20260724000000_bje",
"schema_version": "2.0",
"source": "composite_market_quote",
"source_observed_at": "2026-07-24T00:00:00.000Z",
"sources": [
{
"fetched_at": "2026-07-24T00:00:00.000Z",
"freshness_seconds": 0,
"leg": "crypto_usd",
"market": "USDC/USD",
"observation_type": "recent_trade",
"observed_at": "2026-07-24T00:00:00.000Z",
"pair": "USDCUSD",
"provider": "Kraken",
"provider_role": "primary",
"timestamp_origin": "exchange_trade_time",
"value": "1.00000000",
"venue": "Kraken Spot"
},
{
"fetched_at": "2026-07-24T00:00:00.000Z",
"freshness_seconds": 0,
"leg": "usd_twd",
"market": "USD/TWD",
"observation_type": "fx_rate",
"observed_at": "2026-07-24T00:00:00.000Z",
"pair": "USD/TWD",
"provider": "fxapi.app",
"provider_role": "fx_reference",
"timestamp_origin": "fx_provider_timestamp",
"value": "1.000000",
"venue": "FX reference"
}
],
"stablecoin_usd_price": "1.00000000",
"unit_price": "1.000000",
"usd_twd_rate": "1.000000",
"usdc_usd_price": "1.00000000"
},
"type": "json"
}
},
"routeTemplate": "/x402/v1/value/usdc-twd",
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"amount": {
"description": "Optional positive decimal USDC amount with at most 12 fractional digits. Defaults to 1.",
"example": "1",
"maxLength": 64,
"pattern": "^(?:[0-9]*[1-9][0-9]*(?:\\.[0-9]{1,12})?|0+\\.(?:[1-9][0-9]{0,11}|0{1}[1-9][0-9]{0,10}|0{2}[1-9][0-9]{0,9}|0{3}[1-9][0-9]{0,8}|0{4}[1-9][0-9]{0,7}|0{5}[1-9][0-9]{0,6}|0{6}[1-9][0-9]{0,5}|0{7}[1-9][0-9]{0,4}|0{8}[1-9][0-9]{0,3}|0{9}[1-9][0-9]{0,2}|0{10}[1-9][0-9]{0,1}|0{11}[1-9]))$",
"type": "string"
}
},
"required": [],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"additionalProperties": false,
"properties": {
"amount": {
"pattern": "^(?:[0-9]*[1-9][0-9]*(?:\\.[0-9]{1,12})?|0+\\.(?:[1-9][0-9]{0,11}|0{1}[1-9][0-9]{0,10}|0{2}[1-9][0-9]{0,9}|0{3}[1-9][0-9]{0,8}|0{4}[1-9][0-9]{0,7}|0{5}[1-9][0-9]{0,6}|0{6}[1-9][0-9]{0,5}|0{7}[1-9][0-9]{0,4}|0{8}[1-9][0-9]{0,3}|0{9}[1-9][0-9]{0,2}|0{10}[1-9][0-9]{0,1}|0{11}[1-9]))$",
"type": "string"
},
"asset": {
"const": "USDC",
"type": "string"
},
"converted_value": {
"pattern": "^[0-9]+(?:\\.[0-9]+)?$",
"type": "string"
},
"crypto_source": {
"additionalProperties": false,
"properties": {
"fetched_at": {
"format": "date-time",
"type": "string"
},
"freshness_seconds": {
"maximum": 180,
"minimum": 0,
"type": "integer"
},
"leg": {
"const": "crypto_usd",
"type": "string"
},
"market": {
"type": "string"
},
"observation_type": {
"enum": [
"recent_trade",
"ticker_snapshot"
],
"type": "string"
},
"observed_at": {
"format": "date-time",
"type": "string"
},
"pair": {
"type": "string"
},
"provider": {
"enum": [
"Kraken",
"Bitfinex"
],
"type": "string"
},
"provider_role": {
"enum": [
"primary",
"fallback"
],
"type": "string"
},
"timestamp_origin": {
"enum": [
"exchange_trade_time",
"fetch_completion_time"
],
"type": "string"
},
"value": {
"pattern": "^[0-9]+(?:\\.[0-9]+)?$",
"type": "string"
},
"venue": {
"type": "string"
}
},
"required": [
"leg",
"provider",
"provider_role",
"venue",
"market",
"pair",
"value",
"observed_at",
"observation_type",
"timestamp_origin",
"fetched_at",
"freshness_seconds"
],
"type": "object"
},
"fallback_reason": {
"enum": [
null,
"primary_timeout",
"primary_http_error",
"primary_network_error",
"primary_invalid_payload",
"primary_stale"
],
"type": [
"string",
"null"
]
},
"fallback_used": {
"type": "boolean"
},
"freshness_seconds": {
"minimum": 0,
"type": "integer"
},
"fx_source": {
"additionalProperties": false,
"properties": {
"fetched_at": {
"format": "date-time",
"type": "string"
},
"freshness_seconds": {
"maximum": 600,
"minimum": 0,
"type": "integer"
},
"leg": {
"const": "usd_twd",
"type": "string"
},
"market": {
"type": "string"
},
"observation_type": {
"const": "fx_rate",
"type": "string"
},
"observed_at": {
"format": "date-time",
"type": "string"
},
"pair": {
"type": "string"
},
"provider": {
"const": "fxapi.app",
"type": "string"
},
"provider_role": {
"const": "fx_reference",
"type": "string"
},
"timestamp_origin": {
"const": "fx_provider_timestamp",
"type": "string"
},
"value": {
"pattern": "^[0-9]+(?:\\.[0-9]+)?$",
"type": "string"
},
"venue": {
"type": "string"
}
},
"required": [
"leg",
"provider",
"provider_role",
"venue",
"market",
"pair",
"value",
"observed_at",
"observation_type",
"timestamp_origin",
"fetched_at",
"freshness_seconds"
],
"type": "object"
},
"market_status": {
"const": "fresh",
"type": "string"
},
"product": {
"const": "nomos-value-usdc-twd",
"type": "string"
},
"provider": {
"enum": [
"Kraken + fxapi.app",
"Bitfinex + fxapi.app"
],
"type": "string"
},
"provider_role": {
"enum": [
"primary",
"fallback"
],
"type": "string"
},
"quote_currency": {
"const": "TWD",
"type": "string"
},
"quote_type": {
"const": "live",
"type": "string"
},
"response_generated_at": {
"format": "date-time",
"type": "string"
},
"result_id": {
"pattern": "^val_[0-9]{14}_[0-9a-z]+$",
"type": "string"
},
"schema_version": {
"const": "2.0",
"type": "string"
},
"source": {
"const": "composite_market_quote",
"type": "string"
},
"source_observed_at": {
"format": "date-time",
"type": "string"
},
"sources": {
"items": {
"oneOf": [
{
"additionalProperties": false,
"properties": {
"fetched_at": {
"format": "date-time",
"type": "string"
},
"freshness_seconds": {
"maximum": 180,
"minimum": 0,
"type": "integer"
},
"leg": {
"const": "crypto_usd",
"type": "string"
},
"market": {
"type": "string"
},
"observation_type": {
"enum": [
"recent_trade",
"ticker_snapshot"
],
"type": "string"
},
"observed_at": {
"format": "date-time",
"type": "string"
},
"pair": {
"type": "string"
},
"provider": {
"enum": [
"Kraken",
"Bitfinex"
],
"type": "string"
},
"provider_role": {
"enum": [
"primary",
"fallback"
],
"type": "string"
},
"timestamp_origin": {
"enum": [
"exchange_trade_time",
"fetch_completion_time"
],
"type": "string"
},
"value": {
"pattern": "^[0-9]+(?:\\.[0-9]+)?$",
"type": "string"
},
"venue": {
"type": "string"
}
},
"required": [
"leg",
"provider",
"provider_role",
"venue",
"market",
"pair",
"value",
"observed_at",
"observation_type",
"timestamp_origin",
"fetched_at",
"freshness_seconds"
],
"type": "object"
},
{
"additionalProperties": false,
"properties": {
"fetched_at": {
"format": "date-time",
"type": "string"
},
"freshness_seconds": {
"maximum": 600,
"minimum": 0,
"type": "integer"
},
"leg": {
"const": "usd_twd",
"type": "string"
},
"market": {
"type": "string"
},
"observation_type": {
"const": "fx_rate",
"type": "string"
},
"observed_at": {
"format": "date-time",
"type": "string"
},
"pair": {
"type": "string"
},
"provider": {
"const": "fxapi.app",
"type": "string"
},
"provider_role": {
"const": "fx_reference",
"type": "string"
},
"timestamp_origin": {
"const": "fx_provider_timestamp",
"type": "string"
},
"value": {
"pattern": "^[0-9]+(?:\\.[0-9]+)?$",
"type": "string"
},
"venue": {
"type": "string"
}
},
"required": [
"leg",
"provider",
"provider_role",
"venue",
"market",
"pair",
"value",
"observed_at",
"observation_type",
"timestamp_origin",
"fetched_at",
"freshness_seconds"
],
"type": "object"
}
]
},
"maxItems": 2,
"minItems": 2,
"type": "array"
},
"stablecoin_usd_price": {
"pattern": "^[0-9]+(?:\\.[0-9]+)?$",
"type": "string"
},
"unit_price": {
"pattern": "^[0-9]+(?:\\.[0-9]+)?$",
"type": "string"
},
"usd_twd_rate": {
"pattern": "^[0-9]+(?:\\.[0-9]+)?$",
"type": "string"
},
"usdc_usd_price": {
"pattern": "^[0-9]+(?:\\.[0-9]+)?$",
"type": "string"
}
},
"required": [
"product",
"schema_version",
"asset",
"amount",
"quote_currency",
"quote_type",
"unit_price",
"converted_value",
"source",
"provider",
"provider_role",
"fallback_used",
"fallback_reason",
"source_observed_at",
"response_generated_at",
"freshness_seconds",
"market_status",
"sources",
"result_id",
"stablecoin_usd_price",
"usd_twd_rate",
"crypto_source",
"fx_source",
"usdc_usd_price"
],
"type": "object",
"x-schema-authority": "SHARED_FX_LIVE_QUOTE_CONTRACT",
"x-schema-family": "FX_LIVE_QUOTE_V2"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-11-02T02:44:18.545Z",
"quality": {
"l30DaysTotalCalls": 1,
"l30DaysUniquePayers": 1,
"lastCalledAt": "2026-11-02T02:44:18.424Z"
},
"resource": "https://nohands-coinbase-bazaar.bytoken2023.workers.dev/x402/v1/value/usdc-twd",
"serviceName": "NO HANDS AI",
"tags": [
"x402",
"no-hands-ai",
"market-data"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Return a source-backed live USDC to TWD composite quote for autonomous-agent budget checks."
}What the leaf hashes
{"body":"b79f03f763116d3faf31b68e2bdd5e8665c0c26681c505ca893db2bc92f397c7","id":2201415,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646804862546,"prev":null,"subject":"x402_bazaar:https://nohands-coinbase-bazaar.bytoken2023.workers.dev/x402/v1/value/usdc-twd","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (444186 rows).
- 0x22d7e00b49e93b21a4f2803ab0bcedd6f39c8dd1949855fff9f298e23c30ce9c
- 0xf872b54e3c80a61e62719d20aa0b28e57197f0b4b58d43dd3aa1acccf0d5dd43
- 0xc2a0aeb832c1d456b7065bc81260f2faeebd0df877fcd9649ef771014f697584
- 0x6721d7560b8ad8e39878e677bfafbe80a74fb26434213e03d36001fd3c084994
- 0xd29a3b338e7dd1b5ba3f845a948e37b2df272e693acc1a46a806ef7a5fbf52a7
- 0x87b0658de111634f11e105b79f352ade008a0a9b9fe0d5984522ca70debc5e93
- 0x8a296ccd423e51f3ba83097d215a564380534d472243c08638aa363d1dec418d
- 0xeb720e5626e5037c5801d7b0201c107b4cd55c9384338e5f507d450a6b5e468f
- 0xf51cfe8776b945b555e6db9b152e30b6e21a1fbe68e28447997351f8b30fa2cb
- 0xb9c64ed8e7e3d17ad8bed28c1222ad4f4bc6b755977ba0da015694964bf4b629
- 0xe4d14ccfbebf08e7c43a41fc7f1ebd97fea49b6a1dc1eb8d268d1488e4751b48
- 0xc4d7ef62f6fc13b54d79f9dd5cf9b68259c7d63400ad2da7e24acd09c02a0c04
- 0x1684e269a6d133e78b06586cfa473a0fd25d7ae52c10084dd8c0b8a491f1b827
- 0x401f99eb33c3aca7fb1835eab8a9dc02765c5e3996fc9560617f4be6c7c50067
- 0xcd21ec8d72a18a2d4513e4fd309abbb530810fb1dbeecd4b9b85acb4d6ff8f12
- 0xac40f077ca4be8c3432a67771725cc315e8101fc2649999cfad2c900a7640e27
- 0x53a741b69e9e51c4a288a74712aa6ac3fb28c8923cd3e6461d161c4f2d48b31a
- 0x050f2978b537f7afb21ee1551577cdf146d1c56f4df12d24315ae5e69366b0a4
- 0x365b161a4b68d750dcc4b3ecce1154a2163c87b08762079428e68f0ebb6a754e
- Day root
- 0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1
- Chained
- 0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2
- Published
- On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af