API Integration Cost: Essential Budget Guide to Avoid Risk
Most businesses meet the API integration cost question late — after the software is chosen and somebody finally asks how the new system will talk to the old one. This guide breaks the figure into its five real components, sets out UK price bands from a £2,000 one-way push to £80,000+ multi-system orchestration, compares fixed price against time and materials against a discovery-first engagement, lists the hidden costs that wreck integration budgets (rate limits, legacy authentication, sandbox access, vendor API licence tiers), prices the monthly platform fees a build quote never mentions, and gives you an endpoint-scoring method that reaches a defensible estimate in an afternoon — plus the 15–25% annual maintenance line that decides whether the integration survives year two.
