Scanna
Verified cross-venue market pairs, both venues books side by side, market_b transformed into market_as YES claim space. Each leg carries observed_at (when that venue response arrived), age_seconds and stale; each pair carries observation_skew_seconds - how far apart the two prices were really read, null (never 0) when unknown. Stale pairs are LABELLED and sorted last, not dropped. coverage publishes fresh/stale counts and the bound.
The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
Pay 0.010017 USDC on Base to 0xfca7…4f59e. The signed payment is good for 5 minutes.
- Paid to
- 0xfca7…4f59e
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 10017 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2",
"scannaRouteId": "scanna.priceCompare.get"
},
"payTo": "0xfca7D3B52D69b9b8371dd5765D3f294e46a4f59e",
"amount": "10017",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"limit": 10
}
},
"output": {
"type": "json",
"example": {
"limit": 10,
"pairs": [
{
"stale": false,
"spread": 0.06,
"market_a": {
"id": "6f1f6c9a-0000-4000-8000-000000000001",
"quote": {
"ask": 0.5,
"bid": 0.48,
"mid": 0.49,
"last": 0.48,
"stale": false,
"ask_size": 25,
"bid_size": 50,
"age_seconds": 108,
"captured_at": "2026-07-31T12:40:00.000Z",
"observed_at": "2026-07-31T12:38:12.000Z",
"quote_source": "book",
"venue_updated_at": null
},
"venue": "polymarket",
"question": "Will it happen?"
},
"market_b": {
"id": "6f1f6c9a-0000-4000-8000-000000000002",
"quote": {
"ask": 0.44,
"bid": 0.42,
"mid": 0.43,
"last": null,
"stale": false,
"ask_size": 60,
"bid_size": 30,
"age_seconds": 87,
"captured_at": "2026-07-31T12:40:00.000Z",
"observed_at": "2026-07-31T12:40:21.000Z",
"quote_source": "book",
"venue_updated_at": null
},
"venue": "kalshi",
"question": "Will it happen (Kalshi)?"
},
"relation": "identity",
"transform": "same",
"confidence": 0.95,
"spread_basis": "book_book",
"observation_skew_seconds": 129
}
],
"total": 205,
"coverage": {
"fresh_pairs": 198,
"stale_pairs": 7,
"eligible_pairs": 205,
"max_quote_age_seconds": 3600,
"pairs_missing_observation": 7
},
"updated_at": "2026-07-31T12:41:00.000Z"
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"properties": {
"limit": {
"type": "integer",
"default": 20,
"maximum": 100,
"minimum": 1,
"description": "Pairs returned. Trims the RESPONSE only; the universe is capped at 500 by SQL either way."
}
},
"additionalProperties": false
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"required": [
"pairs",
"total",
"limit",
"coverage",
"updated_at"
],
"properties": {
"limit": {
"type": "integer"
},
"pairs": {
"type": "array",
"items": {
"type": "object"
}
},
"total": {
"type": "integer",
"description": "Eligible pairs before the limit."
},
"coverage": {
"type": "object",
"required": [
"eligible_pairs",
"fresh_pairs",
"stale_pairs",
"pairs_missing_observation",
"max_quote_age_seconds"
],
"properties": {
"fresh_pairs": {
"type": "integer"
},
"stale_pairs": {
"type": "integer"
},
"eligible_pairs": {
"type": "integer"
},
"max_quote_age_seconds": {
"type": "integer",
"description": "The freshness bound, published so the stale/fresh decision is reproducible."
},
"pairs_missing_observation": {
"type": "integer",
"description": "Subset of stale_pairs with no observation at all — OUR fetch failed, not a property of the market."
}
}
},
"updated_at": {
"type": "string"
}
}
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-07-31 17:18Z
- Last indexed by Roundhouse
- 2026-08-22 00:30Z
- Last enriched (probe, favicon, geo)
- 2026-09-13 15:45Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 404
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
Nothing indexed for this service or its provider yet. Not a claim that it is unused — only that we hold no record. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service Scanna and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=Scanna' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://api.scanna.xyz/price-compare, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402, or use an organization key from https://roundhouseai.io/dashboard/team. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.