API Integration Design

Details and scope

Specify an API connection before implementation begins. Interface contract, schemas, error catalogue, example payloads and test specification. Contracts and sample payloads are reviewed with both system owners; open decisions recorded. The stated scope is agreed before work starts; additional work is quoted separately.

Specifications

• 2 systems; up to 20 endpoints, 3 authentication roles and 5 sequence diagrams
• 48 specialist-hours including preparation, delivery, checks and handover
• Interface contract, schemas, error catalogue, example payloads and test specification
• Acceptance: Contracts and sample payloads are reviewed with both system owners; open decisions recorded
• Excludes: Production connector build, penetration testing and third-party subscriptions