For AI agents: the docs index is at https://docs.itispay.com/llms.txt. Append .md to any documentation page URL to get its markdown version.
GET /currencies
curl -X GET https://api.itispay.com/api/v1/currencies \
-H "Api-key: YOUR_API_KEY"
- 200 OK: JSON with "currencies" array, e.g., ["BTC", "ETH", ...].
- 429: Too many requests.
- 500: Server error.
