API to buy and sell USDT with Pix in Brazil
Ia2Pay is the API from IaCrypto for businesses, fintechs and developers. Buy USDT (a stablecoin referenced to the US dollar) paying with Pix and sell USDT receiving Brazilian reais via Pix, with quotes by API.
What it does
BRL to USDT (on-ramp)
Your application creates a buy order with the amount in reais. The API returns a Pix payment code. Once paid, the USDT is sent to the TRON wallet registered in your account.
USDT to BRL (off-ramp)
Your application creates a sell order with the USDT amount. The API returns the address to send the USDT to. Once confirmed, the reais are paid via Pix to your key.
Quotes by API
Get the buy or sell price of USDT in reais before creating an order, and track each order's status through the same API.
How it works
- Create and verify your account. Sign-up confirms your phone, an identity document and a selfie.
- Generate your API credentials. Every request is signed with HMAC-SHA256 and a timestamp.
- Get a quote.
GET /quotesreturns the buy or sell price. - Create the order. For a buy you get a Pix code to pay; for a sell you get the address to send USDT to.
- Track it to completion. Orders move through states such as open, payment confirmed and completed, all queryable by API.
What to know before integrating
| Asset | USDT |
|---|---|
| Network | TRON (TRC-20) |
| BRL settlement | Pix |
| Minimum per order | BRL 200.00 |
| Authentication | API key + HMAC-SHA256 signature with timestamp |
| Rate limits | 30/min for orders, 60/min for quotes |
| Idempotency | Each order carries a unique key that prevents duplicate orders |
| Who can use it | Individuals and companies with a verified Ia2Pay account (Brazilian CPF or CNPJ) |
Want API access or have an integration question? Talk to the team.
Risks and costs
Buying and selling crypto-assets involves risk. Read this before you integrate.
- The price changes. The USDT price in reais moves throughout the day. The price of an order is the quote you fetch through the API (
GET /quotes). - Blockchain transactions cannot be undone. If the wallet address or the network is wrong, the USDT you send may be lost. Check the address and use the TRON network (TRC-20).
- Network and technology risk. Congestion, outages or changes on the TRON network and in wallets can delay an operation.
- Security and compliance checks. Sign-up, orders and payments go through checks, and an operation may be reviewed or may not be completed.
- Costs. Each quote from the API gives one buy price and one sell price. Check the quote before you create each order. If you have questions about fees or additional costs, talk to the team before integrating.
Informational content, not investment advice. Crypto-assets are not covered by Brazil's deposit guarantee fund (FGC).
FAQ
What is Ia2Pay?
Ia2Pay is IaCrypto's API to buy USDT paying with Pix and to sell USDT receiving Brazilian reais (BRL) via Pix. It is a REST API authenticated with HMAC-SHA256.
Who is behind Ia2Pay?
IaCrypto (IACRYPTO INTERMEDIATION & ADMINISTRATION LTDA, Brazilian CNPJ 41.863.658/0001-04), a Brazilian company that has operated in the crypto-asset market since 2021. Ia2Pay is its API product. Full company details are in the footer.
What is USDT?
USDT is a stablecoin referenced to the US dollar. Its price in reais changes throughout the day. See risks and costs.
Which assets and networks does the API support?
Through the API, USDT on the TRON network (TRC-20), with BRL settlement via Pix.
What is the minimum order size?
BRL 200.00 per order.
Do I need an account to use the API?
Yes. The API is used with credentials from a verified Ia2Pay account, and verification includes phone confirmation, an identity document and a selfie. Accounts require a Brazilian CPF or CNPJ.
What are the API rate limits?
30 requests per minute for orders and 60 requests per minute for quotes.
How do I know I am dealing with the real Ia2Pay?
See official channels and how to verify. We never ask for your password, verification code or API secret.