Your systems read the trusted record and write to it through one unified interface, under approved authentication and permissions, with every call documented.
Read and write
Authentication and permissions
Real time or scheduled
Call logging
Copies move by hand or through scheduled files, going stale between updates while the systems disagree.
Integration APIs are the bridge that turns a trusted record from a reference into data working in your systems every day.

Retrieving an entity’s trusted record from other systems without keeping a separate copy.

Sending new data or updates from operational systems into master data management.

Every call subject to authentication and to the permissions granted to the calling system.

Support for calls on demand or on a defined schedule, according to each system’s nature.

Interfaces following one logic across the different master data types, reducing the effort of each integration.

Documenting read and write operations through the interfaces, supporting monitoring and review.
The calling system verifies its identity before reaching any data.
The request is matched against the permissions granted to that system for the requested data type.
Reading the trusted record or submitting an update, depending on the request type.
Recording the operation in the call log with its details for later reference.

Unified interfaces to build integrations on, instead of handling each system with different logic.

Connecting existing systems to the trusted data source without rebuilding their architecture.

Matching data across the systems they work in daily, which reduces reconciliation and rework.

Programmatic access that is permissioned and logged, rather than sitting outside the governance framework.

Connecting the ERP system to trusted customer, supplier, and material data.

Supplying the CRM with the trusted record rather than building one locally.

Building reports on trusted data, so figures agree across different reports.

Presenting accurate, current data to beneficiaries through digital channels.
It is a defined point of contact allowing one system to request data from another or send data to it, following a format and rules agreed in advance.
Real time executes the request when it is needed and returns the latest state. Scheduled moves data at set intervals, which is lighter but leaves a time gap.
Because a copy starts correct and then goes stale. Integration keeps the system connected to the source, reducing the chance of working on outdated data.
It should not. Programmatic access needs authentication and permissions just as human access does, otherwise it becomes a gap in the governance framework.
Because the question of who reached certain data and when comes up in any security or regulatory review. Without a log, the answer becomes an estimate.
Integration moves data as it is. If the source is not governed, integration spreads the problem faster rather than solving it.
Unified programmatic interfaces for reading and writing, subject to authentication and permissions, with every call documented.