Veterinary API: Integration Architecture & Developer Guide
A comprehensive technical reference for software teams building on veterinary clinic data. Covers PIMS integration architecture, normalized data models, webhook delivery, write-back workflows, and how the DataHub Vet unified API layer works.
What Is a Veterinary API?
A veterinary API is a programmatic interface that allows software applications to read and write data from veterinary practice management systems (PIMS). Most PIMS platforms — AVImark, Cornerstone, ImproMed — were not designed with external API access in mind. They store data in relational databases (typically SQL Server) and expose no REST API. Accessing their data requires direct ODBC or SQL access, or a locally-deployed agent running at the clinic.
Why Veterinary Software Integrations Are Difficult
Legacy PIMS systems have no standard API protocol, require on-premise deployment, exhibit schema variance across installations, and change with vendor updates without warning. Write-back to these systems requires deep knowledge of each PIMS's internal validation rules. Teams that build direct integrations typically find that maintenance becomes a significant ongoing engineering cost.
Legacy Veterinary PIMS: AVImark, Cornerstone, ImproMed
The three most common on-premise PIMS in the U.S. market share a similar client/server architecture backed by SQL Server. None expose a native REST API. See the integration guides for AVImark, Cornerstone, and ImproMed.
Normalized Veterinary Data Models
A normalized data model maps AVImark, Cornerstone, and ImproMed schemas to a single consistent structure. The DataHub Vet data model covers clients, patients, appointments, invoices, transactions, medical records (SOAP notes), and providers. Each entity carries both an integrationId and a pimsId for idempotent upserts.
Real-Time Sync vs. Polling
Polling-based integrations query the PIMS on a fixed interval, producing stale data windows, database load, and redundant processing. A webhook-based architecture pushes normalized data to your endpoint when changes occur — typically within 60 seconds of the source event. See Polling vs Webhooks in Veterinary PIMS Integrations.
Write-Back Workflows
Writing data back to legacy PIMS requires correct handling of PIMS-internal validation rules, idempotent record creation, and atomic operations. This is critical for AI scribe applications that need to write SOAP notes back to the clinic's system. See The AI Scribe Integration Gap.
Veterinary API Use Cases
Common integration categories: AI scribes and clinical documentation, scheduling and appointment management, client communication platforms, payments and invoicing, data migration, and practice analytics. See Veterinary AI Scribe and PIMS Integration.
Why DataHub Vet Exists
DataHub Vet provides a unified veterinary API layer — a local agent at the clinic, a cloud delivery pipeline, and a single REST API for your application. You write one integration and gain access to every supported PIMS. DataHub Vet handles PIMS version updates, schema quirks, local agent maintenance, and delivery guarantees. See all supported integrations.