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  1. Choose direction: order_type 0=ONRAMP, 1=OFFRAMP.
  2. Pick token address: see /meta/tokens in the API Reference.
  3. Provide fiat payload:
    • PHONE works for both ON/OFF ramp.
    • TILL/PAYBILL are off-ramp only.
  4. Submit POST /orders/create and capture tx_hash.
  5. Track via /orders/tx/{tx_hash} and webhooks.
For OFFRAMP, the contract allowance must be sufficient. Otherwise you’ll get 400 insufficient_allowance with {required,current}.