# How to create a exchange via API
**Creating exchange via API**
1. Check the exchange - [**limits**](https://docs.calypso.finance/general/limits).
2. Create an exchange by using the method POST | Create exchange;
3. Get exchange details and state by using the method POST | Get exchange;
**Scheme of information process interaction**
Below is an example of creating a exchange from a client’s site or application.
Names of requests on the scheme indicate certain payment API methods.
**Exchange statuses:**
| Status | Description |
| ------------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| IN\_PROGRESS | The exchange order has been created and is awaiting execution. |
| COMPLETED | The funds have been successfully exchanged on the account. |
| FAILED |
An error occurred during the exchange. There may be many reasons for the error. You can follow the steps below to fix it:
1. Wait for a while and create a new exchange. 2. Contact our technical support.
|
**Exchange statuses**
Diagram indicate exchange statuses, arrows indicate processes a successful completion of which transfers an exchange from one status to another.
**Create an exchange via API with additional functions (optional requests)**
1. If you want to make sure that your account has enough assets for exchange and get available asset balances on the account, then use this function:
* Check account balance and ensure enough assets for exchange are available by using the method POST | Get the account;
2. If you want to get a list of available currency pairs for exchanges, use this function:
* Getting available pairs for exchange by using the method POST | Get currency pairs;
3. If you want to know the maximum and minimum available limits for currency exchange, use this function:
* Get upper exchange limits for currencies by using the method POST | Get upper exchange limit by currency;
4. If you want to get a preliminary calculation of the exchange, then use this function:
* Get a preliminary calculation of the exchange amounts by using the method POST | Pre-calculate
5. Create an exchange by using the method POST | Create exchange;
6. Get exchange details and state by using the method POST | Get exchange;
**Scheme of information process interaction**
Below is an example of creating a exchange from a client’s site or application.
Names of requests on the scheme indicate certain payment API methods.
