Welcome

BlendFi is a programmatic PIX-to-USDT onramp. Your partners pay in BRL via Pix, you settle USDT to a wallet you control.

How the docs are organized

• Guides — what to build and how. Plain-language explanations of authentication, idempotency, errors, transaction lifecycles, and KYC flows.
• Reference — every endpoint, parameter, and response shape. Auto-generated from the live API spec, so it never falls out of sync.

Pick where to start

• New here? Read Getting started — sandbox key, first request, your first user in five minutes.
• Already integrating? The Reference is your canonical source for endpoint shapes.
• Hitting something weird? See the Errors guide — every code mapped to plain-English meaning.