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.
$10.17
Verified settled volume
270 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/time/calendar",
"tags": [
"deterministic",
"no-api-key",
"time",
"calendar"
],
"mimeType": "application/json",
"description": "Convert a Gregorian date to other calendar systems: Islamic (both the tabular civil calendar and the Umm al-Qura variant), Hebrew, Japanese imperial era, Republic of China, Buddhist and Persian. Also computes Easter Sunday for a year in both the Gregorian and Julian reckonings. Uses the calendar support built into the runtime, with the algorithm named in every response.",
"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": {
"to": "islamic,hebrew,japanese",
"date": "2026-09-28"
}
},
"output": {
"type": "json",
"example": {
"ok": true,
"data": {
"calendars": {
"hebrew": {
"day": 17,
"era": "AM",
"year": 5787,
"month": 1,
"algorithm": "Hebrew calendar (months numbered from Tishri = 1)",
"formatted": "17 Tishri 5787",
"month_name": "Tishri"
},
"islamic": {
"day": 15,
"era": "AH",
"year": 1448,
"month": 4,
"algorithm": "tabular civil (islamic-civil)",
"formatted": "Rabiʻ II 15, 1448 AH",
"month_name": "Rabiʻ II"
},
"japanese": {
"day": 28,
"era": "Reiwa",
"year": 8,
"month": 9,
"algorithm": "Japanese imperial eras on the Gregorian calendar",
"formatted": "September 28, 8 Reiwa",
"month_name": "September"
}
},
"gregorian": "2026-09-28"
},
"meta": {
"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/time/calendar",
"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": {
"op": {
"enum": [
"convert",
"easter"
],
"type": "string",
"default": "convert",
"maxLength": 64,
"description": "convert (default) a Gregorian date, or easter for a year."
},
"to": {
"type": "string",
"maxLength": 256,
"description": "Comma-separated calendar ids: islamic, islamic-umalqura, hebrew, japanese, roc, buddhist, persian. Default all."
},
"date": {
"type": "string",
"pattern": "^\\d{4}-\\d{2}-\\d{2}$",
"maxLength": 32,
"description": "Gregorian date YYYY-MM-DD. Required when op=convert."
},
"rite": {
"enum": [
"western",
"eastern"
],
"type": "string",
"default": "western",
"maxLength": 64,
"description": "Easter reckoning: western (default) or eastern."
},
"year": {
"type": "string",
"pattern": "^[+-]?\\d+$",
"maxLength": 64,
"description": "Year for op=easter, 326-9999."
}
}
}
},
"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",
"properties": {
"date": {
"type": "string"
},
"rite": {
"type": "string"
},
"year": {
"type": "integer"
},
"algorithm": {
"type": "string"
},
"calendars": {
"type": "object",
"description": "keyed by caller-chosen names",
"additionalProperties": {
"type": "object",
"required": [
"year",
"month",
"month_name",
"day",
"era",
"formatted",
"algorithm"
],
"properties": {
"day": {
"type": "integer"
},
"era": {
"type": "string"
},
"year": {
"type": "integer"
},
"month": {
"type": "integer"
},
"algorithm": {
"type": "string"
},
"formatted": {
"type": "string"
},
"month_name": {
"type": "string"
}
}
}
},
"gregorian": {
"type": "string"
},
"julian_date": {
"type": "string"
},
"unavailable": {
"type": "object",
"description": "keyed by caller-chosen names",
"additionalProperties": {
"type": "string"
}
},
"gregorian_date": {
"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/time/calendar"
},
"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/time/calendar",
"description": "",
"maxAmountRequired": "50000",
"maxTimeoutSeconds": 120
}
]Provenance
- Seen in the source catalog
- 2026-10-01 20:51Z
- 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/time/calendar, 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.