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Head to head · Booking availability · October 2026 research run

OpenTable APIs vs Square Appointments (Bookings API)

Square Appointments (Bookings API) scores 68.1 (B) on agent readiness against OpenTable APIs's 38.6 (E), and leads in every scored category. Both do booking availability.

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

OpenTable APIsOpenTable · HTTP API E38.6/100#1010 of 1094 Square Appointments (Bookings API)Block, Inc. · HTTP API B68.1/100#245 of 1094

Which one, for what

OpenTable APIs E

Best for Approved affiliates, restaurant groups and voice AI vendors that need to book into OpenTable restaurants.

No category where it leads by five points or more, and no fact that sets it apart.

Watch for

Access needs an application, review by the partnerships team and an agreement, with no self-serve credentials

Square Appointments (Bookings API) B

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

Ahead on

  • Reliability, 55 against 35
  • Schema & documentation, 89 against 61
  • Agent ergonomics, 80 against 69
  • Security & auth, 70 against 33
  • Payments & pricing, 40 against 5
  • Maintenance & community, 71 against 5
  • Transparency & trust, 70 against 42

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

Score by category

CategoryWeight this runOpenTable APIsSquare Appointments (Bookings API)Edge
Reliability16%203555Square Appointments (Bookings API) +20
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.26189Square Appointments (Bookings API) +28
Agent ergonomics13%16.26980Square Appointments (Bookings API) +11
Security & auth14%17.53370Square Appointments (Bookings API) +37
Payments & pricing10%12.5540Square Appointments (Bookings API) +35
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.8571Square Appointments (Bookings API) +66
Transparency & trust7%8.84270Square Appointments (Bookings API) +28
Negative events≤1500
TotalE 38.6/100B 68.1/100

Facts side by side

FactOpenTable APIsSquare Appointments (Bookings API)
KindHTTP APIHTTP API
VendorOpenTableBlock, Inc.
Hosted endpointhttps://platform.opentable.comhttps://connect.squareup.com/v2/bookings
TransportsHTTPHTTP, Streamable HTTP, stdio
AuthOAuthOAuth or key
PricingYour planFreemium
x402nono
LicenceProprietary service under each partner's agreement with OpenTable and the Platform Policy published in the API documentationProprietary service under the Square Developer Terms of Service. The OpenAPI specification and MCP server are Apache 2.0
Tools exposednone3
Read-only variant documentednono
llms.txtnoyes
Last releasenone2026-09-16
Terms last updatedcouldn't be read2026-09-10
Privacy policy last updatedcouldn't be read2026-09-15
Customer content may train modelscouldn't be readnot found in the text
Terms restrict automated accesscouldn't be readyes
Terms restrict benchmarkingcouldn't be readyes
Terms or service can change without noticecouldn't be readnot found in the text
Arbitration or class-action waivercouldn't be readyes

Verdicts

OpenTable APIs

The public documentation covers diner-side and venue-side booking in detail, with slot locks, policy endpoints, error tables and an X-Request-Id header for safe retries. Access needs partner approval and a contract, rate limits and prices are not published, and the status page and main website could not be read.

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.

Before you call either

OpenTable APIs

  1. Lock the slot before calling Make Reservation, since the lock and its reservation_token expire within 5 minutes
  2. Send a unique X-Request-Id on every POST, PUT and PATCH so a retried booking is not duplicated
  3. Fetch booking and cancellation policies before booking and show any deposit, hold or service fee to the diner
  4. Use the Consumer API for diner bookings and the In-House Booking API only for a restaurant's own voice or phone channel
  5. Ask the OpenTable representative for the rate limit of each endpoint before going live

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

Questions

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

Square Appointments (Bookings API) scores 68.1 (B) on agent readiness against OpenTable APIs's 38.6 (E), and leads in every scored category.

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

OpenTable APIs uses an OAuth sign-in. Square Appointments (Bookings API) takes an API key or an OAuth sign-in.

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

Yes. OpenTable APIs has a hosted endpoint at https://platform.opentable.com and Square Appointments (Bookings API) at https://connect.squareup.com/v2/bookings.

Other comparisons with OpenTable APIs or Square Appointments (Bookings API)

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