> For the complete documentation index, see [llms.txt](https://docs.unizen.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.unizen.io/api-introduction/before-you-get-started/quote-expiration-deadline.md).

# Quote expiration deadline

By default, quotes do not have an expiration date. Instead, the market determines whether a quote is still valid. If a user delays confirming the trade and market conditions change, the trade may fail due to insufficient amounts, as the previously calculated quote may no longer be executable.

However, each quote may include an optional field called *quoteDeadline*. This field specifies the expiration time for the quote. If the quote is confirmed after this deadline, the trade will fail. Therefore, integrators must pay attention to this field and display it appropriately in the UI to help prevent failed trades for users.

If the *quoteDeadline* field is absent, it indicates there is no expiration for the quote.


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