ABC Trainerize is a personal-training and fitness-coaching software platform for trainers, studios, and gyms - online training, workout programming, nutrition and meal planning, habit and goal tracking, in-app messaging, and a custom-branded client app. Its partner API lets integrators add, modify, and retrieve client data - clients, programs and workouts, goals, habits, body stats, nutrition, appointments, tags, and groups - and register webhooks for business events.
Access model (read first). The ABC Trainerize API is a partner / private API, not open self-serve. API access and webhook registration are available only on the Studio and Enterprise plans. Credentials (an API key and/or an OAuth2 connection) are provisioned from the ABC Trainerize account settings. ABC Trainerize support explicitly does not help build API calls, and the full API reference lives behind the authenticated help center - there is no openly published OpenAPI document. Enterprise plans add dedicated integration support.
Parent company. ABC Trainerize is a product of ABC Fitness Solutions, which acquired Trainerize in 2021. ABC Fitness also runs its own separate developer program at
developers.abcfitness.com; that is a different API surface and is not conflated with the Trainerize API cataloged here.
Grounding & honesty note. The API host and version prefix (
https://api.trainerize.com/v03) were confirmed live by direct probing on 2026-07-12 (TLS 1.3, Microsoft-IIS 10 / ASP.NET Web API, behind Cloudflare + AWS ELB; the/v03prefix returns 200, and unknown sub-paths return ASP.NET "No HTTP resource was found" 404s). The individual operation paths and request/response schemas in the OpenAPI and collections are MODELED from ABC Trainerize's publicly documented capabilities (the help center API/webhooks article and the published Zapier / Latenode partner action catalog) - they are representative, not copied from a public reference. Treat exact paths, parameter names, and payloads as illustrative and verify against the gated docs before implementation.
APIs.json: https://raw.githubusercontent.com/api-evangelist/trainerize/refs/heads/main/apis.yml
- Fitness
- Personal Training
- Coaching
- Fitness Software
- Client Management
- SaaS
- Created: 2026-07-12
- Modified: 2026-07-12
Create, update, find, deactivate, and reactivate clients; assign clients to trainers; and manage client tags and group membership. Used to onboard clients from a form or sync them with a CRM.
- Human URL: Using API and Webhooks With ABC Trainerize
- Base URL:
https://api.trainerize.com/v03
- Clients
- Client Management
- CRM
- Documentation
- OpenAPI — OpenAPI Specification
- Postman Collection — Postman Collection 2.1
- Open Collection — Open Collection 1.0
Assign training to clients - copy a master program onto a client, subscribe a client to a main or add-on program, unsubscribe from programs, add the next training phase, and retrieve a client's workouts.
- Human URL: Using API and Webhooks With ABC Trainerize
- Base URL:
https://api.trainerize.com/v03
- Workout Programming
- Programs
- Workouts
- Documentation
- OpenAPI — OpenAPI Specification
- Postman Collection — Postman Collection 2.1
- Open Collection — Open Collection 1.0
Add, modify, and retrieve a client's goals, habits, body stats, nutrition, and appointments.
- Human URL: Using API and Webhooks With ABC Trainerize
- Base URL:
https://api.trainerize.com/v03
- Goals
- Habits
- Nutrition
- Documentation
- OpenAPI — OpenAPI Specification
- Postman Collection — Postman Collection 2.1
- Open Collection — Open Collection 1.0
Send in-app messages to clients and upload attachments such as meal-plan PDFs.
- Human URL: Using API and Webhooks With ABC Trainerize
- Base URL:
https://api.trainerize.com/v03
- Messaging
- Attachments
- Communication
- Documentation
- OpenAPI — OpenAPI Specification
- Postman Collection — Postman Collection 2.1
- Open Collection — Open Collection 1.0
Register, list, and delete webhook subscriptions that notify an external system when a business event occurs - workout completed, cardio completed, habit completed, daily nutrition goal hit, weight goal hit, new client, new purchase, product start/end, auto-renew cancelled, and tag added/removed. Webhooks are one-way, server-to-endpoint HTTP POSTs.
- Human URL: Using API and Webhooks With ABC Trainerize
- Base URL:
https://api.trainerize.com/v03
- Webhooks
- Events
- Notifications
- Documentation
- OpenAPI — OpenAPI Specification
- Postman Collection — Postman Collection 2.1
- Open Collection — Open Collection 1.0
FN: Kin Lane Email: kin@apievangelist.com