APIs (Application Programming Interfaces) define how software systems communicate with each other. An API integration uses these interfaces to synchronize data, trigger actions, or extend functionality across tools. In marketing operations, API integrations connect your MAP to your CRM, your ad platforms to your analytics, and your enrichment tools to your database.
API integrations come in several flavors. REST APIs (the most common) use HTTP requests to create, read, update, and delete data. GraphQL APIs let you specify exactly what data you want in a single request. Batch APIs handle bulk data operations. Streaming APIs deliver data continuously in real time.
For MOps teams, the most critical API integrations include MAP-to-CRM sync (lead and contact data, campaign membership, engagement data), ad platform APIs (spend data, audience syncing, conversion tracking), enrichment APIs (real-time or batch data enrichment), and analytics APIs (pulling reporting data into dashboards or warehouses).
You do not need to be a developer to work with APIs, but understanding the basics helps. Know what authentication methods your tools use (API keys, OAuth). Understand rate limits (how many requests per minute/hour you can make). Know the difference between GET (read), POST (create), PUT (update), and DELETE operations. And understand pagination (how to retrieve large datasets in chunks).
Build integrations with monitoring from the start. API integrations fail for predictable reasons: expired tokens, rate limit exceeded, schema changes, and endpoint deprecation. Set up alerts so you know when an integration breaks before your data goes stale or your workflows stop functioning.