# Eat App Partner API vs Square Appointments (Bookings API)

> Square Appointments scores 68.1 (B) to Eat App Partner's 53.4 (D) for booking availability. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/eat-app-vs-square-appointments
- Markdown: https://www.anchorterminal.com/compare/eat-app-vs-square-appointments.md (~2,400 tokens)
- Slim: https://www.anchorterminal.com/compare/eat-app-vs-square-appointments.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/eat-app-vs-square-appointments.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-14

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.

- Eat App Partner API: grade D, 53.4/100, rank #752 of 1076. Markdown https://www.anchorterminal.com/tools/eat-app.md · JSON https://www.anchorterminal.com/api/v1/tools/eat-app.json
- Square Appointments (Bookings API): grade B, 68.1/100, rank #242 of 1076. Markdown https://www.anchorterminal.com/tools/square-appointments.md · JSON https://www.anchorterminal.com/api/v1/tools/square-appointments.json
- Best restaurant reservation and local appointment APIs for AI agents: https://www.anchorterminal.com/best/local-bookings/index.md
- All 36 bookings comparisons: https://www.anchorterminal.com/compare/local-bookings/index.md

## Which one, for what

### Eat App Partner API (D)

Good 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)

Good 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

| Category | Weight | Eat App Partner API | Square Appointments (Bookings API) | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 78 | 55 | Eat App Partner API +23 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 59 | 89 | Square Appointments (Bookings API) +30 |
| Agent ergonomics | 13% (16.2 this run) | 66 | 80 | Square Appointments (Bookings API) +14 |
| Security & auth | 14% (17.5 this run) | 43 | 70 | Square Appointments (Bookings API) +27 |
| Payments & pricing | 10% (12.5 this run) | 15 | 40 | Square Appointments (Bookings API) +25 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 40 | 71 | Square Appointments (Bookings API) +31 |
| Transparency & trust | 7% (8.8 this run) | 52 | 70 | Square Appointments (Bookings API) +18 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **53.4 · D** | **68.1 · B** | |

## Facts side by side

| Fact | Eat App Partner API | Square Appointments (Bookings API) |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Eat App (EAT APPLICATION DMCC) | Block, Inc. |
| Hosted endpoint | `https://api.eatapp.co/partners/v2` | `https://connect.squareup.com/v2/bookings` |
| Transports | HTTP | HTTP, Streamable HTTP, stdio |
| Auth | OAuth or key | OAuth or key |
| Pricing | Paid | Freemium |
| x402 | no | no |
| Licence | Proprietary service under Eat App's terms of service (effective 10 September 2025) and partner agreements | Proprietary service under the Square Developer Terms of Service. The OpenAPI specification and MCP server are Apache 2.0 |
| Tools exposed | none | 3 |
| Read-only variant documented | yes | no |
| llms.txt | no | yes |
| Last release | 2026-10-13 | 2026-09-16 |
| Terms last updated | 2025-09-10 | 2026-09-10 |
| Privacy policy last updated | no date given | 2026-09-15 |
| Customer content may train models | not found in the text | not found in the text |
| Terms restrict automated access | not found in the text | yes |
| Terms restrict benchmarking | yes | yes |
| Terms or service can change without notice | not found in the text | not found in the text |
| Arbitration or class-action waiver | not found in the text | yes |

## 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.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/eat-app-vs-square-appointments.json, and with the fewest tokens: https://www.anchorterminal.com/compare/eat-app-vs-square-appointments.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "eat-app", "b": "square-appointments"}`. From a terminal: `anchor compare eat-app square-appointments`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/eat-app.json and https://www.anchorterminal.com/api/v1/tools/square-appointments.json

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