Step 1: Check Supported Config - Rampnow Docs

Optional but recommended. Use these endpoints to build your asset and country pickers so users only see buy and sell routes that will succeed.

Configuration endpoints

Instead of probing asset_config pair-by-pair, use these bulk endpoints to discover what is live:

Endpoint	Returns
`GET /api/partner/v1/ext/ramp_order/config`	Full support matrix in one call: every configured asset, payment mode and order type, split by direction (`buy` = onramp, `sell` = offramp).
`GET /api/partner/v1/ext/ramp_order/blocked_currencies`	Supported countries with the crypto currencies blocked in each. Pass `?country=<ISO alpha-2>` to filter to one country.

For narrower lookups, the Configuration group also exposes asset_config, chain_config, token_config and payment_mode_config. All configuration endpoints are HMAC-authenticated like the rest of the external API.

In the config response, read the buy direction for onramp and the sell direction for offramp. Cache the result and refresh it periodically. It changes rarely.

Next: Get a quote

Price the order before you create it