fluxa Merchant API
fluxa is a pluggable, multi-merchant payment gateway. Use the Merchant API to create charges in USDT/USDC across TRON and EVM chains, track orders, run recurring subscriptions, and receive signed webhook events — all over a single HMAC-signed HTTP API. The net settles on-chain straight to your own wallet (fluxa takes only a fee, never holds your principal).
Getting started
Every request to the Merchant API is authenticated with an API key pair (a public key id pk_... and a secret sk_...) and signed with HMAC-SHA256. Create a key pair in the merchant portal, then read the Quickstart to make your first charge, and Authentication to learn the signing scheme.
The base URL is your fluxa deployment's host — for example https://api.fluxa.example. Throughout
these docs, replace it with your own host. All Merchant API endpoints live under the /api/v1
path prefix.
API reference
Charges
Create a charge to collect a payment across any channel.
Orders
List, retrieve and refund the orders behind your charges.
Subscriptions
Bill a customer on a recurring schedule.
Payouts
Withdraw your available wallet balance.