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Head to head · Booking availability · October 2026 research run

Eat App Partner API vs Square Appointments (Bookings API)

Square Appointments (Bookings API) scores 68.1 (B) on agent readiness against Eat App Partner API's 53.4 (D), and leads in 6 of 7 scored categories. Eat App Partner API leads on reliability. Both do booking availability.

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

Eat App Partner APIEat App (EAT APPLICATION DMCC) · HTTP API D53.4/100#752 of 1076 Square Appointments (Bookings API)Block, Inc. · HTTP API B68.1/100#242 of 1076

Which one, for what

Eat App Partner API D

Best for Booking channels and concierge services that want to book into Eat App restaurants, and for restaurants that want an assistant to read their data.

Ahead on

  • Reliability, 78 against 55

Watch for

A booking channel can book only at restaurants whose partnership Eat App has activated

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 59
  • Agent ergonomics, 80 against 66
  • Security & auth, 70 against 43
  • Payments & pricing, 40 against 15
  • Maintenance & community, 71 against 40
  • Transparency & trust, 70 against 52

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 runEat App Partner APISquare Appointments (Bookings API)Edge
Reliability16%207855Eat App Partner API +23
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.25989Square Appointments (Bookings API) +30
Agent ergonomics13%16.26680Square Appointments (Bookings API) +14
Security & auth14%17.54370Square Appointments (Bookings API) +27
Payments & pricing10%12.51540Square Appointments (Bookings API) +25
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.84071Square Appointments (Bookings API) +31
Transparency & trust7%8.85270Square Appointments (Bookings API) +18
Negative events≤1500
TotalD 53.4/100B 68.1/100

Facts side by side

FactEat App Partner APISquare Appointments (Bookings API)
KindHTTP APIHTTP API
VendorEat App (EAT APPLICATION DMCC)Block, Inc.
Hosted endpointhttps://api.eatapp.co/partners/v2https://connect.squareup.com/v2/bookings
TransportsHTTPHTTP, Streamable HTTP, stdio
AuthOAuth or keyOAuth or key
PricingPaidFreemium
x402nono
LicenceProprietary service under Eat App's terms of service (effective 10 September 2025) and partner agreementsProprietary service under the Square Developer Terms of Service. The OpenAPI specification and MCP server are Apache 2.0
Tools exposednone3
Read-only variant documentedyesno
llms.txtnoyes
Last release2026-10-132026-09-16
Terms last updated2025-09-102026-09-10
Privacy policy last updatedno date given2026-09-15
Customer content may train modelsnot found in the textnot found in the text
Terms restrict automated accessnot found in the textyes
Terms restrict benchmarkingyesyes
Terms or service can change without noticenot found in the textnot found in the text
Arbitration or class-action waivernot found in the textyes

Verdicts

Eat App Partner API

A diner-side Partner API with idempotent booking, a stated rate limit, per-API status monitoring and a changelog updated on 13 October 2026, plus a read-only MCP server for restaurants. Partnerships are activated restaurant by restaurant, API access is priced through sales, and the docs are a Postman collection without OpenAPI or llms.txt.

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

Eat App Partner API

  1. Send a unique idempotency_token with each new booking so a retry returns the first result
  2. Use POST /partners/v2/availability/range, not the legacy availability endpoint
  3. Keep include_tables ranges to 24 hours or less and pass covers with it
  4. Stay under 60 requests a minute and wait for the next minute after a 429
  5. Cancel by PATCH with status canceled, after which the reservation can no longer change

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, Eat App Partner API or Square Appointments (Bookings API)?

Square Appointments (Bookings API) scores 68.1 (B) on agent readiness against Eat App Partner API's 53.4 (D), and leads in 6 of 7 scored categories. Eat App Partner API leads on reliability.

Do Eat App Partner API and Square Appointments (Bookings API) need an API key?

Both take an API key or an OAuth sign-in.

Can an agent call Eat App Partner API and Square Appointments (Bookings API) without installing anything?

Yes. Eat App Partner API has a hosted endpoint at https://api.eatapp.co/partners/v2 and Square Appointments (Bookings API) at https://connect.squareup.com/v2/bookings.

Other comparisons with Eat App Partner API or Square Appointments (Bookings API)

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