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SignalDesk AI FX History
x402
SignalDesk AI FX History is a paid API for AI agents from x402-agent.kariguetoazul.workers.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-13).
Retrieves historical foreign exchange rates between two currencies for a specified date range, sourced from the European Central Bank via Frankfurter.
Price / call$0.003
Success—
StatusUnknown
How this service works
Evidence-backed autonomous AI jobs and paid data tools. Queue/D1/cron run outside the chat; free quotas and bounded execution apply.
Output
Returns a JSON object with the base currency, a date-keyed map of daily exchange rates to the quote currency, the date range covered, and source metadata including provider name (Frankfurter/ECB), fetch timestamp, expiry, and source URL.
Example use cases
Monthly FX report for accounting
“Get me the daily GBP to USD exchange rates for all of October 2024 — I need them for our monthly financial reconciliation.”
Travel expense reimbursement lookup
“What were the EUR to CHF rates between March 10 and March 17, 2025? I need to convert my travel expenses for reimbursement.”
Investment portfolio currency analysis
“Fetch the JPY to USD historical rates from January 1 to June 30, 2024 so I can analyze how currency movements affected our Japan portfolio.”
Technical details
Endpoint
GEThttps://x402-agent.kariguetoazul.workers.dev/api/data/fx-history?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need official ECB reference-rate history for one or more specific date ranges and currency pairs, especially for financial reporting, accounting reconciliation, or compliance use cases that require authoritative central-bank-sourced data. It is ideal for lightweight, per-query lookups billed at $0.003 USDC via x402 micropayments, making it cost-effective for infrequent or agent-driven queries without a subscription.
Side effects
- Invalid currency code (not a 3-letter ISO code) returns a validation error
- Start date after end date may return empty or error response
- Dates in the future beyond available ECB data may return no rates
- Weekend or ECB holiday dates may have no rate entries (ECB does not publish on non-business days)
- Network timeout or Cloudflare worker failure returns 5xx
- Payment failure or insufficient USDC balance returns 402 Payment Required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"base": "EUR",
"rates": {
"2026-09-01": {
"USD": 1.159
},
"2026-09-02": {
"USD": 1.1578
},
"2026-09-03": {
"USD": 1.1615
},
"2026-09-04": {
"USD": 1.1622
}
},
"amount": 1,
"source": {
"provider": "Frankfurter / ECB reference data",
"expires_at": "2026-10-03T09:44:50.475Z",
"fetched_at": "2026-10-02T09:44:50.475Z",
"source_url": "https://api.frankfurter.dev/v1/2026-09-01..2026-09-04?base=EUR&symbols=USD",
"transformed": true
},
"end_date": "2026-09-04",
"start_date": "2026-09-01"
}
}Tags
x402
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