Fixer.io MCP integration

To 1 January 1999. Get Historical Rates returns end-of-day rates for any date from then onwards, which is what Ayro uses when a customer is asking about a charge or invoice priced at an older rate rather than today's.

Up to 365 days in one call. Get Time Series takes a start and end date inclusive and caps the span at a year, so a longer history is answered across several calls rather than one request that Fixer.io would reject.

Get Supported Symbols returns every available currency code with its name, so Ayro resolves what the customer wrote - a country name, an ambiguous symbol - against that list before calling Convert Currency, instead of returning an error for an unrecognised code.

Not through Fixer.io. Every action in this toolkit is a read of rate data, with no payment or ledger write. To act on a converted figure, Ayro pairs the quote with a payments or billing integration that holds the transaction.