API

An API is a defined interface that lets programs talk to each other. Instead of operating a website, one system sends a structured request and receives a structured response. In marketing this enables data transfers, triggered mails, lead handovers and reporting without manual clicks.

How an API call works

A call consists of an address, a method, authentication and payload. The other side processes the request and returns data in a defined format, usually JSON. Good APIs are versioned, documented and return clear error codes. Stable integrations need logging, retry logic and clear ownership for changes.

What matters when integrating

Watch out for rate limits, clean authentication and a clear split between read and write access. Sensitive data does not belong in query strings but in headers or body. Changes to APIs should land in a new version rather than silently breaking the old one.

Relevance for JD Mail, JD Partner and JD Leads

The JD platforms offer APIs for contact updates, triggered sends, reporting queries or lead handovers. This way you can connect CRM, shop, marketing automation and data warehouse without exporting and importing lists. A clean integration saves time and removes errors caused by manual steps.