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

# Execute crypto purchase

> 
Execute a cryptocurrency purchase using a valid quote. **Final step** in the trading flow - converts quote into actual transaction.

#### Prerequisites

- [Get crypto quote](/api-reference/crypto/get-crypto-quote) - Must have valid, unexpired `quoteId`
- [List address book wallets](/api-reference/crypto/list-address-book-wallets) - Must use wallet ID from address book
- **Account Balance** - Specified account must have sufficient funds

#### Key Concepts

- **Quote Expiration**: Ensure quote hasn't expired before execution
- **Address Book Only**: Can only send to wallets from [List address book wallets](/api-reference/crypto/list-address-book-wallets)
- **Immediate Processing**: Creates transaction immediately upon success

#### Usage Flow

1. [Get crypto quote](/api-reference/crypto/get-crypto-quote) - Get valid quote and `quoteId`
2. [List address book wallets](/api-reference/crypto/list-address-book-wallets) - Select destination wallet ID
3. **Execute purchase** using this endpoint
4. [Get transaction details](/api-reference/crypto/get-transaction-details) - Monitor transaction progress

#### After Execution

- [List crypto transactions](/api-reference/crypto/list-crypto-transactions) - View transaction in your history
- [Get transaction details](/api-reference/crypto/get-transaction-details) - Monitor detailed progress
- [Pay crypto transaction debt](/api-reference/crypto/pay-crypto-transaction-debt) - Make payments if needed

#### Error Scenarios

- Quote expired → Get new quote with [Get crypto quote](/api-reference/crypto/get-crypto-quote)
- Invalid wallet → Add wallet with [Add wallet to address book](/api-reference/crypto/add-wallet-to-address-book)
- Insufficient balance → Fund account or reduce purchase amount