Preview the fee for a single transfer 🔒
Transfers
Preview the fee for a single transfer 🔒
Calculate the fee for a single transfer before initiating it. Use this to show your users the exact cost.
POST
Preview the fee for a single transfer 🔒
Authorizations
Your business API key (live_key_...). Issued on approval; managed in Dashboard → Settings → Developer.
Base64(HMAC-SHA256(secretApiKey, input)) over the raw request body (POST) or canonicalized
query string (signed GET). Also send X-Numero-Signature-Version: v2. Required on
money-movement / state-changing endpoints (marked 🔒).
Body
application/json