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.
Boulevard is listed with 7 APIs on the APIs.io network. Tagged areas include Salon Software, Spa Software, Med Spa, Appointment Scheduling, and GraphQL.
Boulevard’s developer surface includes engineering blog, documentation, and 8 more developer resources.
Regulatory Posture applies to this provider. Its tags matched the
Payments regime, so
Regulatory Posture carries 15 points of the composite.
If this regime is wrong for your business, say so on your
provider repo — the
applicability map is public and we will correct it.
Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for
this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero:
never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and
several others — scorable at all.
The six quality facets above are damped to 85 points between them,
because the conditional facet above carries the other
15. That is why each facet's contribution is shown against a damped
maximum: raising a quality facet moves the composite by 85% of its nominal
weight, not 100%. The full arithmetic is at apis.io/rating/.
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Agent readiness — checks not met, largest first (exact, from this profile):
Machine-Readable Auth+10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
Idempotency+9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
Stable Error Semantics+8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
12 more unmet checks in the Agent Readiness table above.
Kin Score — facets with the most composite points still available (weight × headroom):
Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.
Query and mutate client (customer) records synced from Boulevard's CRM - profiles, contact details, custom fields, loyalty point balances, and appointment history. Third parties...
Read and sync appointment, staff, and location data across a business's calendar - past, current, and future appointments, professional rosters, and the physical/virtual locatio...
Access recurring membership and prepaid package data - plan status, renewal state, and entitlements. Membership lifecycle changes are also pushed outbound as MEMBERSHIP_CREATED,...
Issue and manage stored-value gift cards, service vouchers, and account credit adjustments as a certified payment facilitator. Documented mutations include `CreateGiftCard`, `vo...
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 timeslo...
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 listi...
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 d...
Not yet checked against Boulevard's own pricing page. Compiled by API Evangelist on 2026-07-03 from www.joinblvd.com/pricing; confirm before you rely on a figure.
aid: boulevard
url: https://raw.githubusercontent.com/api-evangelist/boulevard/refs/heads/main/apis.yml
name: Boulevard
kind: company
description: 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.
deliveryModel:
model: saas
open_source: false
commercial: true
callable_host: false
label: Hosted service · you call their endpoint
confidence: medium
source:
- pricing
generated: '2026-08-28'
method: derived
accessModel:
pricing: paid
onboarding: unknown
trial: false
try_now: false
public: false
label: Paid
confidence: low
source:
- plans
- security
generated: '2026-11-06'
method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/boulevard.png
tags:
- Salon Software
- Spa Software
- Med Spa
- Appointment Scheduling
- GraphQL
- CRM
- Payments
- Self-Care
- Scheduling
created: '2026-07-03'
modified: '2026-10-06'
specificationVersion: '0.23'
apis:
- aid: boulevard:boulevard-admin-clients-crm-api
name: Boulevard Admin API - Clients & CRM
tags:
- Clients
- CRM
- Custom Fields
- GraphQL
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
humanURL: https://developers.joinblvd.com/2020-01/admin-api/overview
baseURL: https://dashboard.boulevard.io/api/2020-01/admin
properties:
- url: https://developers.joinblvd.com/2020-01/admin-api/overview
type: Documentation
- url: https://developers.joinblvd.com/2020-01/admin-api/authentication
type: Documentation
- url: https://developers.joinblvd.com/graphql-admin-api/api-reference/types/Business
type: APIReference
description: 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.
- aid: boulevard:boulevard-admin-appointments-scheduling-api
name: Boulevard Admin API - Appointments, Staff & Locations
tags:
- Appointments
- Scheduling
- Staff
- Location
- GraphQL
tags_raw:
- Appointments
- Scheduling
- Staff
- Locations
- GraphQL
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
humanURL: https://developers.joinblvd.com/2020-01/admin-api/overview
baseURL: https://dashboard.boulevard.io/api/2020-01/admin
properties:
- url: https://developers.joinblvd.com/2020-01/admin-api/overview
type: Documentation
- url: https://developers.joinblvd.com/2020-01/admin-api/authentication
type: Documentation
description: 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.
- aid: boulevard:boulevard-admin-memberships-packages-api
name: Boulevard Admin API - Memberships & Packages
tags:
- Membership
- Packages
- Subscription
- GraphQL
tags_raw:
- Memberships
- Packages
- Subscriptions
- GraphQL
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
humanURL: https://developers.joinblvd.com/2020-01/admin-api/overview
baseURL: https://dashboard.boulevard.io/api/2020-01/admin
properties:
- url: https://developers.joinblvd.com/2020-01/admin-api/overview
type: Documentation
description: 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.
- aid: boulevard:boulevard-admin-payments-gift-cards-api
name: Boulevard Admin API - Payments, Gift Cards & Vouchers
tags:
- Payments
- Gift Cards
- Vouchers
- Account Credit
- GraphQL
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
humanURL: https://developers.joinblvd.com/2020-01/admin-api/overview
baseURL: https://dashboard.boulevard.io/api/2020-01/admin
properties:
- url: https://developers.joinblvd.com/2020-01/admin-api/overview
type: Documentation
description: 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.
- aid: boulevard:boulevard-client-booking-cart-api
name: Boulevard Client API - Booking Cart & Checkout
tags:
- Booking
- Cart
- Checkout
- GraphQL
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
humanURL: https://developers.joinblvd.com/2020-01/client-api/overview
baseURL: https://dashboard.boulevard.io/api/2020-01/client
properties:
- url: https://developers.joinblvd.com/2020-01/client-api/overview
type: Documentation
- url: https://developers.joinblvd.com/2020-01/client-api/authentication
type: Documentation
- url: https://github.com/Boulevard/book-sdk
type: SDK
- url: https://github.com/Boulevard/create-booking-flow
type: SDK
description: 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`.
- aid: boulevard:boulevard-client-catalog-availability-api
name: Boulevard Client API - Catalog & Availability
tags:
- Services
- Staff
- Location
- Availability
- GraphQL
tags_raw:
- Services
- Staff
- Locations
- Availability
- GraphQL
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
humanURL: https://developers.joinblvd.com/2020-01/client-api/overview
baseURL: https://dashboard.boulevard.io/api/2020-01/client
properties:
- url: https://developers.joinblvd.com/2020-01/client-api/overview
type: Documentation
- url: https://github.com/Boulevard/book-sdk
type: SDK
description: 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.
- aid: boulevard:boulevard-tokenization-api
name: Boulevard Tokenization API
tags:
- Tokenization
- PCI Compliance
- Payments
- REST
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
humanURL: https://developers.joinblvd.com/2020-01/tokenization-api/overview
baseURL: https://vault.blvd.co
properties:
- url: https://developers.joinblvd.com/2020-01/tokenization-api/overview
type: Documentation
description: 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.
common:
- url: https://www.joinblvd.com/blog
type: Blog
- type: DomainSecurity
url: security/boulevard-domain-security.yml
- type: GitHubOrganization
url: https://github.com/Boulevard
- type: LinkedIn
url: https://www.linkedin.com/company/boulevard
- type: Website
url: https://www.joinblvd.com/
- type: Documentation
url: https://developers.joinblvd.com/
- type: Plans
url: plans/boulevard-plans-pricing.yml
- type: RateLimits
url: rate-limits/boulevard-rate-limits.yml
- type: FinOps
url: finops/boulevard-finops.yml
- type: Blog
url: https://www.joinblvd.com/rss.xml
maintainers:
- FN: Kin Lane
email: kin@apievangelist.com
Boulevard API — frequently asked questions
Does Boulevard have an API?
Yes. APIs.io lists 7 APIs from Boulevard, including Boulevard Admin API - Clients & CRM, Boulevard Admin API - Appointments, Staff & Locations and Boulevard Admin API - Memberships & Packages, and 4 more.
How much does the Boulevard API cost?
APIs.io lists 5 pricing plans for Boulevard, with each plan's price, limits and inclusions under Pricing on this page.
Is the Boulevard API ready for AI agents?
Boulevard has a Kin Score of 11.3 out of 100 (emerging) and an Agent Readiness score of 0.6 (human-only), scored by API Evangelist on 2026-11-06.
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