Nexora ESRD LLP · Software Development & IT Services
API Development & System Integration
An API is an agreement between systems about the information and actions they can share. We make that agreement clear enough for developers to use and practical enough to handle everyday failures.
Discuss your projectDefine API contracts and data meaning
Before building endpoints, we agree the records, identifiers and permitted actions. A field needs a meaning, not just a data type: which time zone does a timestamp use, and does an empty value mean unknown or not applicable? Example requests and responses help both teams discover mismatches before the connection becomes a dependency.
Design for requests that do not arrive neatly
Connections can time out after an action has already succeeded. We decide when retries are safe and how duplicate work is prevented. Validation, useful error responses and access checks belong in the service itself. External provider limits and outages are considered so one failing connection does not create an uncontrolled queue of requests.
Keep consumers working as the service changes
An API can have several clients using different releases. We plan compatibility, version changes and a route for retiring old behaviour. Logs should support troubleshooting without exposing secrets or unnecessary personal data. Integration checks cover expected responses and failure cases, while handover explains how another developer can authenticate, test and diagnose the connection.
Project deliverables
- API contract with example payloads
- Endpoints and access controls
- Integration and failure-case checks
- Consumer documentation and change plan
Service questions and answers
What do you need before connecting two systems?
Share the supported interface documentation, example records and the permissions available for testing. We need to understand which system owns each field and which actions are allowed. A small connection check can reveal limits in authentication, data quality or provider access before the full integration is planned.
Explore related services Assess integration feasibility
What happens if an API request times out?
A timeout does not always mean the requested action failed. The receiving system may already have completed it. We define when a retry is safe, how duplicate requests are recognised and what status the caller can check. These rules are tested alongside normal responses so recovery does not create repeated business actions.
Explore related services Test integration failure and recovery cases
How are API permissions enforced?
The service should verify identity and permission for each relevant action and record, rather than trusting a hidden button in the user interface. Credentials need appropriate storage and rotation arrangements. We agree the access boundary and include checks for users or systems attempting operations outside their assigned role.
Explore related services Review access controls and security boundaries
Can we update an API without breaking its users?
Often, but the change needs a compatibility review. Identify current consumers, the fields they use and the errors they expect before altering behaviour. Versioning or a transition period may be appropriate. Documentation and tests should make the new contract clear and record when older behaviour can safely be retired.
Explore related services Plan a controlled software transition
Discuss your project
Tell us what you want to build. We'll help you find a clear way forward.
Discuss your project