Welcome

BlendFi partner documentation, guides, references, and recipes for building Pix ↔ USDT integrations.

BlendFi is a programmatic Pix ↔ USDT bridge for Brazilian users. Take BRL via Pix and settle USDT on-chain (onramp), or take USDT and pay Pix to a Brazilian recipient (offramp). One API, both directions.

Pick where to start

Quickstart

Make your first authenticated call in under five minutes.

Build an onramp

PIX → USDT integration with code samples and a state-machine walkthrough.

Build an offramp

USDT → PIX integration with verify-twice DICT validation.

Recipes

End-to-end (Build an X) tutorials with copy-paste code.

How the docs are organized

Get started: Quickstart, authentication, sandbox & keys.
Concepts: KYC, idempotency, webhooks, fees, errors, audit. The primers.
Build an onramp / Build an offramp: full integration guides per direction.
KYC flow: identity verification, cross-cutting.
Webhooks integration: receive and process conversion, transaction, and KYC events.
Recipes: three end-to-end tutorials with runnable code.
Reference: every endpoint, parameter, and response shape. Auto-generated; never falls out of sync.
Resources: errors catalog, environments and rate limits, changelog.
Glossary: alphabetical reference for every domain term.

Hitting something weird?

Errors: every code mapped to plain meaning, who caused it, and what to do, errors catalog.
Need help: email partner support with the request_id from the response. We can find your request in seconds with that.