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Agent402 UK Currency Code Validator
x402
Agent402 UK Currency Code Validator is a paid API for AI agents from agent402.co.uk, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Validates whether a currency code is a known common ISO 4217 code or stablecoin (USDC/EURC) before performing FX operations
Price / call$0.001
Success—
StatusUnknown
How this service works
Don't burn tokens on deterministic work. Go/no-go jobs first: payout preflight, text firewall (PII/secrets), budget check — then rails, calendars, finmath. x402 USDC on Base. UK + global. agent402.co.uk — not agent402.tools. $0.001–$0.002 USDC on Base. No API keys.
Output
Returns a JSON object with the submitted currency code, a `known_common` boolean indicating whether it is a recognized common ISO 4217 currency or supported stablecoin (USDC/EURC), and a `valid_format` boolean indicating whether the code is structurally well-formed. Does not represent the full ISO 4217 table.
Example use cases
Pre-FX conversion currency gate
“I'm about to convert some funds from USD to SGD — can you first check that SGD is a valid, recognized currency code before we proceed?”
Stablecoin code recognition check
“Is USDC recognized as a valid currency code in your system? I need to confirm before I set up the payment routing.”
Payment form currency validation
“A user just typed 'EUU' as their currency — can you validate whether that's a known ISO 4217 currency code or stablecoin, and flag it if not?”
Technical details
Endpoint
POSThttps://agent402.co.uk/v1/validate/currency-codeWhen to prefer
Use this endpoint as a lightweight pre-validation gate before performing any FX conversion or currency-aware operation to avoid downstream errors. Prefer it when you need a fast, cheap check against common ISO 4217 codes and stablecoins (USDC/EURC) rather than a full ISO 4217 table lookup. Not suitable when exhaustive coverage of all ISO 4217 codes is required.
Side effects
- Unknown or obscure ISO 4217 codes not in the common subset may return known_common: false even if technically valid
- Malformed input (e.g. empty string, numeric code) may return valid_format: false
- Network timeouts or service unavailability may result in HTTP 5xx errors
- Payment failure via x402 protocol may block access and return 402 Payment Required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| code | string | Currency code |
Output
Schema · Response
{
"type": "json",
"example": {
"code": "GBP",
"known_common": true,
"valid_format": true
}
}Tags
x402
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