# Gaplessly Appointments engine API

**Canonical:** https://apis.io/apis/gaplessly-com/gaplessly-com-appointments-engine-api/  
**Provider:** Gaplessly — https://apis.io/providers/gaplessly-com/  
**Base URL:** https://gaplessly.com  
**Documentation:** https://gaplessly.com/docs/api-reference

Gaplessly Appointments engine API is one of 7 APIs that [Gaplessly](https://apis.io/providers/gaplessly-com/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Appointments engine. The published artifact set on APIs.io includes an OpenAPI specification.

Read an appointments business's services, staff and appointments, and book, move or cancel appointments, with an API key. A key from a table-reservations organization gets `403 wrong_vertical`.

## Operations (6)

| Method | Path | Summary |
|---|---|---|
| GET | `/api/v1/appointments` | List appointments |
| POST | `/api/v1/appointments` | Book an appointment |
| GET | `/api/v1/services` | List services |
| GET | `/api/v1/providers` | List staff |
| PATCH | `/api/v1/appointments/{id}` | Change an appointment |
| POST | `/api/v1/appointments/{id}/cancel` | Cancel an appointment |

## Machine-readable artifacts (1)

- **OpenAPI** — https://artifacts.apis.io/gaplessly-com/openapi/gaplessly-com-appointments-engine-api-openapi.yml

## Other Gaplessly APIs (6)

- [Gaplessly Agent (MCP) API](https://apis.io/apis/gaplessly-com/gaplessly-com-agent-mcp-api/)
- [Gaplessly Guest self-service API](https://apis.io/apis/gaplessly-com/gaplessly-com-guest-self-service-api/)
- [Gaplessly Hospitality engine API](https://apis.io/apis/gaplessly-com/gaplessly-com-hospitality-engine-api/)
- [Gaplessly Public booking (appointments) API](https://apis.io/apis/gaplessly-com/gaplessly-com-public-booking-appointments-api/)
- [Gaplessly Public booking (hospitality) API](https://apis.io/apis/gaplessly-com/gaplessly-com-public-booking-hospitality-api/)
- [Gaplessly Shared API](https://apis.io/apis/gaplessly-com/gaplessly-com-shared-api/)

## Tags

Appointments engine

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/gaplessly-com/gaplessly-com-appointments-engine-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/gaplessly-com/.