Supported Assets:

• USD, USDC, USDT, PYUSD, RLUSD, USDG, USDP, EURC, MXNB
  Supported Networks:
• Fiat deposit networks: US_FEDWIRE, SWIFT
• Crypto networks: ETHEREUM, POLYGON, BASE, ARBITRUM, AVALANCHE, BNBCHAIN, SOLANA, TRON

Validation Rules:

• Supported pairs: fiat->crypto, crypto->fiat, and crypto->crypto; fiat->fiat is NOT supported
• Idempotency-Key header is required and must be a valid UUID v4
• Source network must match asset type (fiat asset requires fiat network, crypto asset requires crypto network)
• For crypto withdrawal destination: network is required when wallet_address is provided
• For fiat destination: network will be omitted
• For a crypto-to-fiat bank payout that requires a local payment code, set destination.code to the applicable value from the Local Payment Code guide

Withdrawal Configuration:

• Fiat-to-Crypto or Crypto->Crypto with withdrawal: provide wallet_address (external crypto wallet address)
• Crypto-to-Fiat with withdrawal: provide external_account_id (bank account ID from external-accounts API)
• Conversion-only (no withdrawal): omit both fields, converted funds remain in customer's account

Idempotency & Webhook Behavior:

• This endpoint provisions resources asynchronously. A rule-creation webhook may arrive before the HTTP response.
• Reusing an existing Idempotency-Key returns 409 Conflict. Use Get Auto-Conversion Rule by Idempotency Key to retrieve the rule after a duplicate request, timeout, or webhook.
• Correlate the response and webhook with the creation key, then retrieve the rule to check its current status and deposit information.

Response & Status:

• The create response returns the rule's current status. It may still be PENDING, or asynchronous provisioning may already have advanced it.
• The create response omits deposit_info_status and source_deposit_info, even if the returned rule is already ACTIVE.
• Retrieve the rule to get deposit information. Only fund it when deposit_info_status=ACTIVE and source_deposit_info is present. Rule status=ACTIVE alone does not establish that deposit information is available.