api.duoleads.com
No description published for this endpoint.
OtherLiveeip155:8453Exactvia facilitator:thirdweb
Calls · 30d
2→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 32 snapshots so far.
$24.45
Verified settled volume
627 settlements proven x402 by their on-chain EIP-3009 marker.
$0.050
Listed price
As published in the catalog. Always read the live 402 before paying.
—
Calls · 30d
Upstream's own call count for this endpoint, not ours.
—
Unique payers · 30d
Never called
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xCD673f7e1daD254347AEab6be0DEFe8b9C6b3A39The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
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.
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.
{
"error": "Payment required",
"terms": "https://api.duoleads.com/terms",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xCD673f7e1daD254347AEab6be0DEFe8b9C6b3A39",
"amount": "50000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 120
}
],
"resource": {
"url": "https://api.duoleads.com/v1/ref/airport",
"tags": [
"deterministic",
"no-api-key",
"ref",
"travel",
"airports"
],
"mimeType": "application/json",
"description": "Look up an airport by IATA or ICAO code and get its name, city, country, ISO 3166-2 region code, WGS-84 coordinates, elevation and IANA time zone, or find the nearest airports to a coordinate within a radius. Covers every airport worldwide that holds a three-letter IATA code and scheduled service. Returns the code type that matched and the distance in kilometres for proximity results.",
"serviceName": "Duo Data Utilities"
},
"disclaimer": "Factual output of a deterministic computation over public data. Provided as is, with no warranty of accuracy, completeness or availability. Not investment, financial, legal, tax, medical or any other professional advice, and not a recommendation. Verify before relying on it. Terms: https://api.duoleads.com/terms",
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"code": "AMS"
}
},
"output": {
"type": "json",
"example": {
"ok": true,
"data": {
"found": true,
"airport": {
"lat": 52.3086,
"lon": 4.76389,
"iata": "AMS",
"icao": "EHAM",
"name": "Amsterdam Airport Schiphol",
"type": "large_airport",
"region": "NL-NH",
"country": "NL",
"timezone": "Europe/Amsterdam",
"elevation_ft": -11,
"municipality": "Amsterdam"
},
"matched_on": "iata"
},
"meta": {
"sources": [
{
"id": "ourairports",
"licence": "Public Domain",
"version": "2026-09-28 extract",
"published": "2026-09-28",
"attribution": "OurAirports (public domain)"
},
{
"id": "timezone-boundary-builder",
"licence": "ODbL-1.0",
"version": "2026d",
"published": "2026-09-29",
"attribution": "Time zones derived from timezone-boundary-builder data (https://github.com/evansiroky/timezone-boundary-builder), (c) contributors, ODbL 1.0, via timezonefinder 9.0.0"
}
],
"price_usd": "0.05",
"disclaimer": "Factual output of a deterministic computation over public data. Provided as is, with no warranty of accuracy, completeness or availability. Not investment, financial, legal, tax, medical or any other professional advice, and not a recommendation. Verify before relying on it. Terms: https://api.duoleads.com/terms",
"request_id": "01K6B7Q4ZC8H3F2M9WXR5TYN0D",
"computed_at": "2026-09-28T12:00:00.000Z",
"deterministic": true
},
"route": "/v1/ref/airport",
"version": "1.0.0"
}
}
},
"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",
"required": [],
"properties": {
"code": {
"type": "string",
"maxLength": 16,
"description": "3-letter IATA or 4-letter ICAO code, case-insensitive."
},
"near": {
"type": "string",
"maxLength": 64,
"description": "lat,lon to search around."
},
"limit": {
"type": "string",
"default": "5",
"pattern": "^[+-]?\\d+$",
"maxLength": 64,
"description": "Maximum results 1-25, default 5. Only with near."
},
"country": {
"type": "string",
"maxLength": 16,
"description": "ISO 3166-1 alpha-2 filter."
},
"radius_km": {
"type": "string",
"default": "100",
"pattern": "^[+-]?(\\d+(\\.\\d*)?|\\.\\d+)([eE][+-]?\\d+)?$",
"maxLength": 64,
"description": "Search radius in km, 1-1000, default 100. Only with near."
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"required": [
"ok",
"route",
"version",
"data",
"meta"
],
"properties": {
"ok": {
"const": true
},
"data": {
"type": "object",
"required": [
"found"
],
"properties": {
"found": {
"type": "boolean"
},
"nearby": {
"type": "array",
"items": {
"type": "object",
"required": [
"iata",
"icao",
"name",
"municipality",
"country",
"region",
"lat",
"lon",
"elevation_ft",
"type",
"timezone",
"distance_km",
"bearing_deg"
],
"properties": {
"lat": {
"type": "number"
},
"lon": {
"type": "number"
},
"iata": {
"type": "string"
},
"icao": {
"type": "string"
},
"name": {
"type": "string"
},
"type": {
"type": "string"
},
"region": {
"type": "string"
},
"country": {
"type": "string"
},
"timezone": {
"type": "string"
},
"bearing_deg": {
"type": "number"
},
"distance_km": {
"type": "number"
},
"elevation_ft": {
"type": [
"number",
"null"
]
},
"municipality": {
"type": "string"
}
}
}
},
"airport": {
"type": "object",
"required": [
"iata",
"icao",
"name",
"municipality",
"country",
"region",
"lat",
"lon",
"elevation_ft",
"type",
"timezone"
],
"properties": {
"lat": {
"type": "number"
},
"lon": {
"type": "number"
},
"iata": {
"type": "string"
},
"icao": {
"type": "string"
},
"name": {
"type": "string"
},
"type": {
"type": "string"
},
"region": {
"type": "string"
},
"country": {
"type": "string"
},
"timezone": {
"type": "string"
},
"elevation_ft": {
"type": [
"number",
"null"
]
},
"municipality": {
"type": "string"
}
}
},
"matched_on": {
"type": "string"
}
}
},
"meta": {
"type": "object",
"required": [
"request_id",
"computed_at",
"price_usd",
"deterministic",
"disclaimer"
],
"properties": {
"sources": {
"type": "array",
"items": {
"type": "object",
"required": [
"id",
"version",
"published"
]
}
},
"price_usd": {
"type": "string"
},
"disclaimer": {
"type": "string"
},
"request_id": {
"type": "string"
},
"computed_at": {
"type": "string",
"description": "RFC 3339 UTC with milliseconds"
},
"deterministic": {
"type": "boolean"
}
}
},
"route": {
"const": "/v1/ref/airport"
},
"version": {
"type": "string"
}
}
}
}
}
}
}
}
},
"x402Version": 2
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.05USDC≈ $0.05 USD
on Base · exact scheme
Pay 0.05 USDC on Base to 0xCD67…b3A39. The signed payment is good for 2 minutes.
- Paid to
- 0xCD67…b3A39
- USD Coin contract
- 0x8335…02913
- Payment window
- 2 minutes
- As published
- 50000 smallest units
- Returns
- application/json
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xCD673f7e1daD254347AEab6be0DEFe8b9C6b3A39",
"scheme": "exact",
"network": "eip155:8453",
"mimeType": "application/json",
"resource": "https://api.duoleads.com/v1/ref/airport",
"description": "",
"maxAmountRequired": "50000",
"maxTimeoutSeconds": 120
}
]Provenance
- Seen in the source catalog
- 2026-10-01 20:53Z
- Last indexed by Roundhouse
- 2026-10-26 05:46Z
- Last enriched (probe, favicon, geo)
- 2026-10-01 04:15Z
- x402 version
- 1
- Max timeout
- 120s
- Liveness probe
- HTTP 402
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
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 32 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service api.duoleads.com 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=api.duoleads.com' 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.duoleads.com/v1/ref/airport, 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. Either pay over x402 (mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.