# Resy vs Square Appointments (Bookings API)

> Square Appointments scores 68.1 (B) to Resy's 10.3 (F) for booking availability. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/resy-vs-square-appointments
- Markdown: https://www.anchorterminal.com/compare/resy-vs-square-appointments.md (~2,200 tokens)
- Slim: https://www.anchorterminal.com/compare/resy-vs-square-appointments.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/resy-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 Resy's 10.3 (F), and leads in every scored category. Both do booking availability.

- Resy: grade F, 10.3/100, rank #1068 of 1076. Markdown https://www.anchorterminal.com/tools/resy.md · JSON https://www.anchorterminal.com/api/v1/tools/resy.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

### Resy (F)

Good for: Diners booking in person through the app.

Watch for: No public API or MCP server an outside agent can call. The Amex dining MCP endpoint takes only pre-registered OAuth clients

### Square Appointments (Bookings API) (B)

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

Ahead on:
- Reliability, 55 against 25
- Schema & documentation, 89 against 0
- Agent ergonomics, 80 against 0
- Security & auth, 70 against 3
- Payments & pricing, 40 against 0
- Maintenance & community, 71 against 25
- Transparency & trust, 70 against 30

Also in its favour:
- A hosted endpoint, with nothing to install
- 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 | Resy | Square Appointments (Bookings API) | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 25 | 55 | Square Appointments (Bookings API) +30 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 0 | 89 | Square Appointments (Bookings API) +89 |
| Agent ergonomics | 13% (16.2 this run) | 0 | 80 | Square Appointments (Bookings API) +80 |
| Security & auth | 14% (17.5 this run) | 3 | 70 | Square Appointments (Bookings API) +67 |
| Payments & pricing | 10% (12.5 this run) | 0 | 40 | Square Appointments (Bookings API) +40 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 25 | 71 | Square Appointments (Bookings API) +46 |
| Transparency & trust | 7% (8.8 this run) | 30 | 70 | Square Appointments (Bookings API) +40 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **10.3 · F** | **68.1 · B** | |

## Facts side by side

| Fact | Resy | Square Appointments (Bookings API) |
| --- | --- | --- |
| Kind | Platform | HTTP API |
| Vendor | Resy (American Express) | Block, Inc. |
| Hosted endpoint | no (local only) | `https://connect.squareup.com/v2/bookings` |
| Transports |  | HTTP, Streamable HTTP, stdio |
| Auth | OAuth | OAuth or key |
| Pricing | Paid | Freemium |
| x402 | no | no |
| Licence | Proprietary service. Resy Network, Inc. publishes separate privacy and merchant terms for Resy and Tock | 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 | no | no |
| llms.txt | no | yes |
| Last release | none | 2026-09-16 |
| Terms last updated | no document linked | 2026-09-10 |
| Privacy policy last updated | couldn't be read | 2026-09-15 |
| Customer content may train models |  | not found in the text |
| Terms restrict automated access |  | yes |
| Terms restrict benchmarking |  | yes |
| Terms or service can change without notice |  | not found in the text |
| Arbitration or class-action waiver |  | yes |

## Verdicts

**Resy.** Resy is a large diner reservation network, now including Tock's venues, with American Express behind it. There is no public API or MCP server an outside agent can call today. An Amex-hosted MCP endpoint exists but accepts only pre-registered clients and has no public documentation, and Resy's own terms and privacy pages 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

### Resy

1. Don't plan to call Resy from another agent. Hand the booking to the person in the Resy app, or use a client that American Express has approved for its dining MCP
2. Do not automate the Resy website or app, since Resy runs a bot-detection programme against automated booking

### 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, Resy or Square Appointments (Bookings API)?

Square Appointments (Bookings API) scores 68.1 (B) on agent readiness against Resy's 10.3 (F), and leads in every scored category.

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

No hosted endpoint is listed for Resy. Square Appointments (Bookings API) has a hosted endpoint at https://connect.squareup.com/v2/bookings.


## For agents

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

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- [SevenRooms vs Square Appointments (Bookings API)](https://www.anchorterminal.com/compare/sevenrooms-vs-square-appointments.md)
- [Square Appointments (Bookings API) vs Tock](https://www.anchorterminal.com/compare/square-appointments-vs-tock.md)