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Head to head · Booking availability · October 2026 research run

Square Appointments (Bookings API) vs TableCheck API

Square Appointments (Bookings API) scores 68.1 (B) on agent readiness against TableCheck API's 57.1 (C), and leads in 6 of 7 scored categories. TableCheck API leads on reliability. Both do booking availability.

Best restaurant reservation and local appointment APIs for AI agents · All 36 bookings comparisons

Square Appointments (Bookings API)Block, Inc. · HTTP API B68.1/100#242 of 1076 TableCheck APITableCheck Inc. · HTTP API C57.1/100#661 of 1076

Which one, for what

Square Appointments (Bookings API) B

Best for Venue-side appointment booking for salons, clinics and other service businesses already on Square.

Ahead on

  • Schema & documentation, 89 against 77
  • Agent ergonomics, 80 against 72
  • Security & auth, 70 against 46
  • Payments & pricing, 40 against 0
  • Maintenance & community, 71 against 35

Also in its favour

  • Runs on your own machine

Watch for

Seller-level create, update and cancel fail with 403 unless the seller pays for Plus ($49) or Premium ($149) per location

TableCheck API C

Best for Restaurants and groups in Japan and Asia on TableCheck, and booking or concierge platforms wanting their inventory.

Ahead on

  • Reliability, 80 against 55

Watch for

Access needs an emailed application, case-by-case approval and fees quoted privately

Score by category

CategoryWeight this runSquare Appointments (Bookings API)TableCheck APIEdge
Reliability16%205580TableCheck API +25
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28977Square Appointments (Bookings API) +12
Agent ergonomics13%16.28072Square Appointments (Bookings API) +8
Security & auth14%17.57046Square Appointments (Bookings API) +24
Payments & pricing10%12.5400Square Appointments (Bookings API) +40
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.87135Square Appointments (Bookings API) +36
Transparency & trust7%8.87066Square Appointments (Bookings API) +4
Negative events≤1500
TotalB 68.1/100C 57.1/100

Facts side by side

FactSquare Appointments (Bookings API)TableCheck API
KindHTTP APIHTTP API
VendorBlock, Inc.TableCheck Inc.
Hosted endpointhttps://connect.squareup.com/v2/bookingshttps://api.tablecheck.com/api/
TransportsHTTP, Streamable HTTP, stdioHTTP, Streamable HTTP
AuthOAuth or keyAPI key
PricingFreemiumPaid
x402nono
LicenceProprietary service under the Square Developer Terms of Service. The OpenAPI specification and MCP server are Apache 2.0Proprietary service under the TableCheck API Terms of Service
Tools exposed320
Read-only variant documentednoyes
llms.txtyesno
Last release2026-09-16none
Terms last updated2026-09-102022-10-11
Privacy policy last updated2026-09-152016-12-14
Customer content may train modelsnot found in the textnot found in the text
Terms restrict automated accessyesnot found in the text
Terms restrict benchmarkingyesyes
Terms or service can change without noticenot found in the textnot found in the text
Arbitration or class-action waiveryesnot found in the text

Verdicts

Square Appointments (Bookings API)

The Bookings API lets an agent working for a Square seller search availability and create, change and cancel appointments, with a public OpenAPI spec, appointment OAuth scopes and idempotency keys. It acts for the venue. Seller-level writes need Plus or Premium, services with a no-show fee can't be booked through it, and it hasn't changed since September 2024.

TableCheck API

TableCheck publishes OpenAPI specs for availability, booking, CRM and POS components and a merchant MCP server with read-only keys, idempotent writes and personal data hidden by default. Access is by email application with case-by-case approval and unpublished fees, the MCP server is still under development, and no audit log or dated changelog was found.

Before you call either

Square Appointments (Bookings API)

  1. Act for the seller. This API books into one Square seller's calendar, not across businesses
  2. Call RetrieveBusinessBookingProfile and check support_seller_level_writes before trying to create or cancel a seller-level booking
  3. Call SearchAvailability first, then CreateBooking with the service variation ID and version, team member, location and customer
  4. Send a fresh idempotency_key on each create, update or cancel, and pass booking_version when cancelling
  5. Check no_show_fee on the service. A service with a non-zero fee must be booked by the customer elsewhere

TableCheck API

  1. Decide which side you act for. Distribution and Web Booking serve diner-facing platforms, while Booking, CRM, POS and the MCP serve the venue
  2. Ask the operator for a read-only key before using the MCP, as TableCheck recommends, and avoid cancellations through it
  3. Call hold_table (MCP) or POST /blockages (REST) before booking, since availability is a snapshot and a blockage expires in 5 minutes
  4. Send dates as YYYY-MM-DD and convert the UTC times returned to the venue's time zone from list_shops
  5. Stay under 10,000 requests per 5 minutes per component and wait for the next window after a 429

Questions

Which is better for AI agents, Square Appointments (Bookings API) or TableCheck API?

Square Appointments (Bookings API) scores 68.1 (B) on agent readiness against TableCheck API's 57.1 (C), and leads in 6 of 7 scored categories. TableCheck API leads on reliability.

Do Square Appointments (Bookings API) and TableCheck API need an API key?

Square Appointments (Bookings API) takes an API key or an OAuth sign-in. TableCheck API needs an API key.

Can an agent call Square Appointments (Bookings API) and TableCheck API without installing anything?

Yes. Square Appointments (Bookings API) has a hosted endpoint at https://connect.squareup.com/v2/bookings and TableCheck API at https://api.tablecheck.com/api/.

Other comparisons with Square Appointments (Bookings API) or TableCheck API

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