> ## Documentation Index
> Fetch the complete documentation index at: https://docs.lead.bank/llms.txt
> Use this file to discover all available pages before exploring further.

# Supported Blockchains and Fiat Rails

> Details about the rails and currencies Lead supports today.

When you use blockchain payments, keep the following in mind:

<Danger>
  Funds sent to **unsupported asset/blockchain pairs** or to **incorrect addresses** may be **irretrievable and permanently lost**.
</Danger>

<Danger>
  Make sure you send amounts above the transaction minimum. See [Transaction Minimums](#transaction-minimums) below.
</Danger>

<Warning>
  Lead does not support USDB for users in the EEA due to regulatory restrictions.
</Warning>

## Supported Rails & Currencies

| Rail               | Currency                                                |
| ------------------ | ------------------------------------------------------- |
| `ach`              | Settlement currency must be set to **USD**              |
| `wire`             | Settlement currency must be set to **USD**              |
| `sepa`             | Settlement currency must be set to **EUR**              |
| `swift`            | Settlement currency must be set to **USD**              |
| `spei`             | Settlement currency must be set to **MXN**              |
| `pix`              | Settlement currency must be set to **BRL**              |
| `faster_payments`  | Settlement currency must be set to **GBP**              |
| `bre_b`            | Settlement currency must be set to **COP**              |
| `co_bank_transfer` | Settlement currency must be set to **COP**              |
| `solana`           | Settlement currency must be set to **USDC** or **USDB** |
| `base`             | Settlement currency must be set to **USDC** or **USDB** |
| `ethereum`         | Settlement currency must be set to **USDC** or **USDB** |

<Info>
  Additional blockchains and currencies available upon request. Reach out to your Technical Account Manager for more details.
</Info>

## **Transaction Minimums**

The minimum is **\$3.00 on every rail** — `300` minor units (for example, cents) of
`instructed_amount`. If you submit an `instructed_amount` below `300`, Lead rejects the
payment at creation and returns HTTP `422` with an `invalid_parameters` entry for
`amounts.instructed_amount`.

Lead accepts only US-dollar-denominated values for `instructed_currency_code` — `USD` for
an `account_number_id` debtor, `USDC` or `USDB` for a `wallet_address` debtor, all pegged
1:1 — so the minimum is the same \$3.00 regardless of the destination rail or its
settlement currency.