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Full detail: Where this data comes from
Boulevard is a client experience platform purpose-built for appointment-based self-care businesses - hair salons, spas, medspas, barbershops, and nail salons. The platform covers self-scheduling, CRM, marketing, payments (as a certified PayFac), and reporting. Boulevard exposes its integration surface as GraphQL - a Client API for building custom booking experiences and an Admin API for syncing business operations data (clients, appointments, staff, locations, memberships, gift cards) - plus a separate Tokenization API for PCI-scope-reducing card capture. API access is gated to the Enterprise tier and provisioned through a developer sandbox (business ID + API key) via the Boulevard Developer Portal.
APIs.json: https://raw.githubusercontent.com/api-evangelist/boulevard/refs/heads/main/apis.yml
- Salon Software
- Spa Software
- Med Spa
- Appointment Scheduling
- GraphQL
- CRM
- Payments
- Self-Care
- Created: 2026-07-03
- Modified: 2026-07-03
Query and mutate client (customer) records synced from Boulevard's CRM - profiles, contact details, custom fields, loyalty point balances, and appointment history. Third parties such as Klaviyo and Extole use this domain's updateClient mutation to write loyalty and referral state back into Boulevard.
- Human URL: https://developers.joinblvd.com/2020-01/admin-api/overview
- Base URL:
https://dashboard.boulevard.io/api/2020-01/admin
- Clients
- CRM
- Custom Fields
- GraphQL
- Documentation
- Documentation
- API Reference
- GraphQL
- GraphQL Schema
- Postman Collection — Postman Collection 2.1
- Open Collection — Open Collection 1.0
Read and sync appointment, staff, and location data across a business's calendar - past, current, and future appointments, professional rosters, and the physical/virtual locations services are delivered from. Backs webhook-driven integrations that react to APPOINTMENT_CREATED, APPOINTMENT_CONFIRMED, and APPOINTMENT_COMPLETED events.
- Human URL: https://developers.joinblvd.com/2020-01/admin-api/overview
- Base URL:
https://dashboard.boulevard.io/api/2020-01/admin
- Appointments
- Scheduling
- Staff
- Locations
- GraphQL
- Documentation
- Documentation
- GraphQL
- GraphQL Schema
- Postman Collection — Postman Collection 2.1
- Open Collection — Open Collection 1.0
Access recurring membership and prepaid package data - plan status, renewal state, and entitlements. Membership lifecycle changes are also pushed outbound as MEMBERSHIP_CREATED, MEMBERSHIP_CANCELLED, and MEMBERSHIP_RENEWAL_SUCCEEDED webhook events, which downstream tools like Klaviyo consume for lifecycle marketing.
- Human URL: https://developers.joinblvd.com/2020-01/admin-api/overview
- Base URL:
https://dashboard.boulevard.io/api/2020-01/admin
- Memberships
- Packages
- Subscriptions
- GraphQL
- Documentation
- GraphQL
- GraphQL Schema
- Postman Collection — Postman Collection 2.1
- Open Collection — Open Collection 1.0
Issue and manage stored-value gift cards, service vouchers, and account credit adjustments as a certified payment facilitator. Documented mutations include CreateGiftCard, vouchersCreate, and createAccountCreditAdjustment, used by referral/loyalty platforms (e.g. Extole) to fulfill rewards directly inside a business's Boulevard account.
- Human URL: https://developers.joinblvd.com/2020-01/admin-api/overview
- Base URL:
https://dashboard.boulevard.io/api/2020-01/admin
- Payments
- Gift Cards
- Vouchers
- Account Credit
- GraphQL
- Documentation
- GraphQL
- GraphQL Schema
- Postman Collection — Postman Collection 2.1
- Open Collection — Open Collection 1.0
Build custom, on-brand self-booking experiences on top of a cart workflow - create a cart for a location, add a selected purchasable (service) item, reserve an available timeslot, attach a tokenized card as the payment method, and check out. Confirmed mutations from the official book-sdk and promotion-demo reference clients include CreateCart, AddCartSelectedPurchasableItem, AddCartCardPaymentMethod, and CheckoutCart.
- Human URL: https://developers.joinblvd.com/2020-01/client-api/overview
- Base URL:
https://dashboard.boulevard.io/api/2020-01/client
- Booking
- Cart
- Checkout
- GraphQL
- Documentation
- Documentation
- SDK
- SDK
- GraphQL
- GraphQL Schema
- Postman Collection — Postman Collection 2.1
- Open Collection — Open Collection 1.0
Public-facing catalog reads that power a booking widget before a client ever creates a cart - business and location lookup, bookable service categories, staff/professional listings, and bookable dates/times for a chosen service and location. Mirrors the book-sdk modules Businesses, Locations, Services, Staff, and the cart's getBookableDates / getBookableTimes calls.
- Human URL: https://developers.joinblvd.com/2020-01/client-api/overview
- Base URL:
https://dashboard.boulevard.io/api/2020-01/client
- Services
- Staff
- Locations
- Availability
- GraphQL
- Documentation
- SDK
- GraphQL
- GraphQL Schema
- Postman Collection — Postman Collection 2.1
- Open Collection — Open Collection 1.0
A narrow, non-GraphQL REST endpoint (POST https://vault.blvd.co/cards/tokenize, confirmed in the public promotion-demo reference client's source) used to exchange raw card details for a reusable payment token client-side, before that token is attached to a cart via the Client API's AddCartCardPaymentMethod mutation. Keeps merchant integrations out of PCI DSS scope by ensuring card numbers never transit the integrator's own servers.
- Human URL: https://developers.joinblvd.com/2020-01/tokenization-api/overview
- Base URL:
https://vault.blvd.co
- Tokenization
- PCI Compliance
- Payments
- REST
FN: Kin Lane Email: kin@apievangelist.com