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

# Upfront fee quotes

> Request a signed quote for CCTP Fast Transfer and Forwarding Service fees and learn how fee types and quote expiry work.

A fee quote is a signed, [time-bound](#quote-expiry) price for the upfront fees
on a specific transfer. Requesting one locks in the Fast Transfer fee, the
Forwarding Service fee, or both, so you know the exact cost before you submit
the transfer. To see where the quote fits in the end-to-end flow, see
[How upfront fees work](/cctp/concepts/how-upfront-fees-work).

## Requesting a quote

Call
[`POST /v2/quote/burn/usdc/{sourceDomainId}/{destDomainId}`](/api-reference/cctp/all/create-usdc-burn-quote)
with these request fields:

* `amount`: the USDC transfer amount, in minor units.
* `feeToken`: the token you want to pay fees in. Use the zero address (the
  default) to price the fee in the native gas token, or the source blockchain's
  USDC address to price it in USDC.
* `requests`: the fees to price. Include a `FORWARD` request for the Forwarding
  Service fee, a `PRE_FINALITY` request for the Fast Transfer fee, or both, with
  at most one of each type.

The response includes the `signedQuote` blob you submit onchain, the total fee
and fee token, a per-type breakdown, and the quote's issue time and expiry.

<Note>
  A quote is bound to the exact transfer it prices. Request the quote with the
  same amount and destination domain you submit onchain. For a `FORWARD` fee, also
  match the destination caller and hook data. If any bound value differs when you
  submit, the transfer reverts.
</Note>

## Fee types

You can pay two types of fees upfront, one per service.

| Fee type       | Service                                                 |
| -------------- | ------------------------------------------------------- |
| `FORWARD`      | [Forwarding Service](/cctp/concepts/forwarding-service) |
| `PRE_FINALITY` | [Fast Transfer](/cctp/concepts/fees)                    |

A `FORWARD` request requires a destination domain where Forwarding Service is
supported, and a `PRE_FINALITY` request requires a source blockchain available
for Fast Transfers. See
[Supported blockchains](/cctp/concepts/supported-chains-and-domains) for the
blockchains that support each service.

## Quote expiry

Each quote expires after a short, fixed window that depends on the source
blockchain. Submit the transfer before the quote expires; otherwise, request a
new quote. The following table lists the approximate expiry window for each
supported source blockchain. These values are subject to change.

| Source blockchain | Approximate quote expiry |
| ----------------- | ------------------------ |
| Arbitrum          | 2 minutes                |
| Arc testnet       | 2 minutes                |
| Avalanche         | 2 minutes                |
| Base              | 2 minutes                |
| Codex             | 2 minutes                |
| Ethereum          | 2 minutes 30 seconds     |
| HyperEVM          | 2 minutes                |
| Ink               | 2 minutes                |
| Linea             | 2 minutes                |
| Monad             | 2 minutes                |
| OP Mainnet        | 2 minutes                |
| Plume             | 2 minutes                |
| Polygon PoS       | 2 minutes                |
| Sei               | 2 minutes                |
| Sonic             | 2 minutes                |
| Unichain          | 2 minutes                |
| World Chain       | 2 minutes                |
| XDC               | 2 minutes                |

A quote's expiry is either an exact wall-clock time or a source blockchain block
number. For a block-number expiry, translating it into remaining time requires
knowing the source blockchain and its live block height.