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GET
Supported Currencies
The 63 quote currencies accepted by the vs_currency / vs_currencies parameter of every other CoinGecko tool — fiat such as usd and eur, metals such as xau, and crypto such as btc. Returns a flat array of lowercase strings and takes no parameters. Call it before using a non-obvious quote currency rather than guessing at one. For the coin-side identifier map use get_coingecko_coins_list.
First time? Point any MCP client at https://mcp.aisa.one/mcp — Claude Code, Codex, Cursor, VS Code and the rest. Authorization is OAuth: the client opens a browser, you click Allow once, and there is no key to paste. The commands per client, and what each call costs, are on aisa.one/mcp.
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Authorizations

Authorization
string
header
required

Bearer authentication header of the form Bearer <token>, where <token> is your auth token.

Response

200 - application/json

Array of currency codes.