# API and integration

> An API is a documented way for one program to exchange data with another; an integration uses APIs to connect services — a website, a CRM, payments, a messenger — so data moves between them automatically.

- URL: https://veilvex.com/blog/glossary/api-integration/
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**Definition:** An API is a documented way for one program to exchange data with another; an integration uses APIs to connect services — a website, a CRM, payments, a messenger — so data moves between them automatically.

**Example:** When a customer pays online, the payment service tells the website through its API, the order is marked paid and the CRM gets the deal without anyone typing anything.

## Common mistakes

- Storing API keys in the website code where anyone can read them.
- Not planning for the other service being down or changing its API.
- Connecting everything to everything, so nobody knows where the data comes from.

Related service: [AI automation & bots](https://veilvex.com/services/ai-automation/)

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