> ## Documentation Index
> Fetch the complete documentation index at: https://developer.me-cash.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Supported Ramp Assets & Destinations

> Reference matrix of supported cryptocurrencies, blockchain networks, offramp fiat corridors, payment channels, and transaction limits for the meCash Ramp API.

<Warning>
  🚧 **The Ramp API is currently under construction.** Endpoints and features described here are subject to change. Do not use in production until this notice is removed.
</Warning>

Use this matrix to confirm your source cryptocurrency, target network or fiat currency, and applicable limits before building your Ramp integration.

***

## Supported cryptocurrencies

The Ramp API accepts the following tokens as source assets. Each token is identified by its **symbol** and the **blockchain** it travels on — always specify both when calling the quote or gas fee endpoints.

| **Token** | **Symbol** | **Blockchain**    | **Blockchain ID**                |
| --------- | ---------- | ----------------- | -------------------------------- |
| USD Coin  | `USDC`     | Ethereum (ERC-20) | `ETH`                            |
| USD Coin  | `USDC`     | Polygon           | `MATIC` / `MATIC-AMOY` (Sandbox) |
| Tether    | `USDT`     | Ethereum (ERC-20) | `ETH`                            |
| Tether    | `USDT`     | Polygon           | `MATIC` / `MATIC-AMOY` (Sandbox) |
| Ether     | `ETH`      | Ethereum (ERC-20) | `ETH`                            |
| Polygon   | `POL`      | Polygon           | `MATIC` / `MATIC-AMOY` (Sandbox) |

<Warning>
  Always send assets on the correct network. Sending a token on an unsupported or mismatched network will result in **permanent loss of funds**. meCash cannot recover assets sent to the wrong network.
</Warning>

***

## Address format

For all Ethereum-based networks (Ethereum, Polygon), wallet addresses must satisfy:

```
^(0x)[0-9A-Fa-f]{40}$
```

* Starts with `0x`
* Followed by exactly 40 hexadecimal characters
* Total length: 42 characters

<Tip>
  The `addressRegex` field returned on every quote response contains the validation pattern for that specific network. Use it in your UI to pre-validate addresses before submission.
</Tip>

***

## Offramp fiat destinations

For offramp transactions (crypto-to-fiat), specify `target.country` and `target.currency` in your [Create Quote (Offramp)](/quote-ramp/create-quote-offramp) request.

| **Currency**    | **Code** | **Country**         | **Country Code** | **Payment Channel(s)**          |
| --------------- | -------- | ------------------- | ---------------- | ------------------------------- |
| Nigerian Naira  | `NGN`    | Nigeria 🇳🇬        | `NG`             | `BANK_TRANSFER`, `MOBILE_MONEY` |
| US Dollar       | `USD`    | United States 🇺🇸  | `US`             | `BANK_TRANSFER` (SWIFT)         |
| Euro            | `EUR`    | Euro zone 🇪🇺      | (varies)         | `BANK_TRANSFER` (SEPA)          |
| British Pound   | `GBP`    | United Kingdom 🇬🇧 | `GB`             | `BANK_TRANSFER`                 |
| Canadian Dollar | `CAD`    | Canada 🇨🇦         | `CA`             | `BANK_TRANSFER`                 |

### Payment channels

| **Channel**     | **Description**                                                       |
| --------------- | --------------------------------------------------------------------- |
| `BANK_TRANSFER` | Credit a traditional bank account via local or international networks |
| `MOBILE_MONEY`  | Deliver funds to a mobile money wallet (NGN corridors)                |

***

## Transaction limits

Limits are enforced per quote and returned in the `rules` array of every quote response. The values below are defaults — always read the `rules` array at runtime as they may differ per corridor or account tier.

| **Currency** | **Minimum** | **Maximum (per transaction)** |
| ------------ | ----------- | ----------------------------- |
| NGN          | ₦10         | ₦2,000,000                    |
| USD          | \$10        | \$50,000                      |
| EUR          | €10         | €50,000                       |
| GBP          | £10         | £50,000                       |
| CAD          | CA\$10      | CA\$50,000                    |

<Info>
  The `rules[].invoice` field on the quote response represents the cumulative invoice limit. If your transaction approaches this ceiling, you may need to split the order.
</Info>

***

## Gas fees

Gas fees apply to **all** crypto transfers (both crypto-to-crypto and offramp). Three priority levels are available:

| **Level** | **Speed**            | **Use case**                                      |
| --------- | -------------------- | ------------------------------------------------- |
| `LOW`     | Slower (\~5–15 min)  | Non-urgent transfers where cost matters           |
| `MEDIUM`  | Standard (\~2–5 min) | Balanced speed and cost (**default for offramp**) |
| `HIGH`    | Faster (\~1–2 min)   | Time-sensitive transfers                          |

* For **crypto-to-crypto**: call [Get Gas Fee](/quote-ramp/get-gas-fee) first, then pass `feeLevel.type` into your [Create Quote (Crypto)](/quote-ramp/create-quote-crypto) request.
* For **offramp**: gas is automatically calculated at `MEDIUM` and returned in the `gasFee` block of the [Create Quote (Offramp)](/quote-ramp/create-quote-offramp) response.

***

## Processing times

| **Category**                  | **Destination** | **Estimated time** |
| ----------------------------- | --------------- | ------------------ |
| Crypto-to-Crypto (Polygon)    | Any EVM wallet  | \~1–2 minutes      |
| Crypto-to-Crypto (Ethereum)   | Any EVM wallet  | \~2–5 minutes      |
| Offramp → NGN (Bank Transfer) | Nigerian bank   | 5–30 minutes       |
| Offramp → NGN (Mobile Money)  | Mobile wallet   | 1–5 minutes        |
| Offramp → USD (SWIFT)         | US bank         | 1–3 business days  |
| Offramp → EUR (SEPA)          | Euro bank       | 1–2 business days  |
| Offramp → GBP                 | UK bank         | 1–4 hours          |

<Info>
  Processing times may be affected by network congestion (crypto) or bank processing schedules and public holidays (fiat).
</Info>

***

## Next steps

<CardGroup cols={2}>
  <Card title="How Ramp Works" icon="arrows-rotate" href="/ramp-docs/about-ramp">
    Understand the full API lifecycle and transaction flows.
  </Card>

  <Card title="Create Quote (Crypto)" icon="calculator" href="/quote-ramp/create-quote-crypto">
    Start a crypto-to-crypto transfer by generating a quote.
  </Card>

  <Card title="Create Quote (Offramp)" icon="money-bill-transfer" href="/quote-ramp/create-quote-offramp">
    Convert crypto to fiat currency by generating an offramp quote.
  </Card>

  <Card title="Ramp Webhooks" icon="bell" href="/webhook/ramp-webhook">
    Set up webhooks to receive real-time transaction status updates.
  </Card>
</CardGroup>