API integrations with explicit delivery rules

Agree behaviour before connecting endpoints

A website accepts a request, CRM stores the customer, an operational tool manages the order and another service delivers a document. APIs provide a connection, but they do not define how the process behaves. Some systems respond immediately; others queue work, and an action may complete after the caller times out.

A useful integration distinguishes accepted work, pending delivery and situations needing attention. Otherwise, an apparently successful request can leave incomplete data, duplicates or a task nobody knows was lost.

Define fields, permissions and retry rules

We identify data sources, available APIs, permissions, request limits and change notifications. We define stable identifiers, field formats and the owner of each value. Deletions, reference-data mapping and the difference between a retry and a new action need explicit answers.

Documentation and access are reviewed within the system owner’s permissions. Testing needs synthetic records and a separate environment where available. If there is no test API, we agree a safe test procedure and its limitations instead of assuming real orders can be used for experiments.

Start with one event between two systems

An initial stage might deliver one event type between two systems. Input is validated, accepted work is preserved and delivery has its own state. A retry uses the same operation identifier. If the receiving service cannot prevent duplicates, the proposal needs another reconciliation method.

Partial failures require retry rules and a point at which a person intervenes. Operators need understandable status, while developers need diagnostic detail without unnecessary personal information. Access should be limited to the actions the integration requires.

Test timeouts and partial failures

Possible deliverables are a field contract, working delivery, test scenarios and recovery instructions. We verify valid input, rejected data, repeated actions, timeouts and temporary outages. External API changes belong in the support plan; the connection will need attention as those APIs evolve.

Explore the Dent-Picks project and reliable CRM handoffs. For an operational interface, see internal systems; for release and recovery, see infrastructure.

Get an initial estimate in the detailed form. We’ll agree the scope and final price after discussing the project. Name the systems and the action that needs to pass between them.