# Acuity Scheduling API vs Agenda Hero

> Acuity Scheduling scores 42.4 (E) to Agenda Hero's 34.5 (F) for calendar access. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/acuity-scheduling-vs-agenda-hero
- Markdown: https://www.anchorterminal.com/compare/acuity-scheduling-vs-agenda-hero.md (~2,450 tokens)
- Slim: https://www.anchorterminal.com/compare/acuity-scheduling-vs-agenda-hero.min.md (~780 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/acuity-scheduling-vs-agenda-hero.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
- MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key)
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)
- Updated: 2026-10-21

Acuity Scheduling API scores 42.4 (E) on agent readiness against Agenda Hero's 34.5 (F), and leads in 4 of 7 scored categories. Agenda Hero leads on security & auth and maintenance & community. Both do calendar access.

- Acuity Scheduling API: grade E, 42.4/100, rank #1054 of 1197. Markdown https://www.anchorterminal.com/tools/acuity-scheduling.md · JSON https://www.anchorterminal.com/api/v1/tools/acuity-scheduling.json
- Agenda Hero: grade F, 34.5/100, rank #1115 of 1197. Markdown https://www.anchorterminal.com/tools/agenda-hero.md · JSON https://www.anchorterminal.com/api/v1/tools/agenda-hero.json
- Best calendar and scheduling APIs for AI agents: https://www.anchorterminal.com/best/scheduling/index.md
- All 66 scheduling comparisons: https://www.anchorterminal.com/compare/scheduling/index.md

## Which one, for what

### Acuity Scheduling API (E)

Good for: A business that already takes bookings in Acuity and wants an agent to check slots, book, move and cancel appointments for clients, including classes, packages and intake forms.

Ahead on:
- Reliability, 58 against 35
- Schema & documentation, 56 against 18
- Agent ergonomics, 44 against 28

Watch for: The pricing page lists custom API access on Premium only, $61 a month or $49 billed yearly

### Agenda Hero (F)

Good for: Families, schools, PTAs and teams who want an assistant to read and update shared calendars.

Ahead on:
- Security & auth, 38 against 27
- Maintenance & community, 58 against 15

Also in its favour:
- Free to start without a card

Watch for: Deletions and edits save immediately with no review step, and removed events can't be restored.


## Score by category

| Category | Weight | Acuity Scheduling API | Agenda Hero | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 58 | 35 | Acuity Scheduling API +23 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 56 | 18 | Acuity Scheduling API +38 |
| Agent ergonomics | 13% (16.2 this run) | 44 | 28 | Acuity Scheduling API +16 |
| Security & auth | 14% (17.5 this run) | 27 | 38 | Agenda Hero +11 |
| Payments & pricing | 10% (12.5 this run) | 30 | 30 | even |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 15 | 58 | Agenda Hero +43 |
| Transparency & trust | 7% (8.8 this run) | 54 | 52 | Acuity Scheduling API +2 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **42.4 · E** | **34.5 · F** | |

## Facts side by side

| Fact | Acuity Scheduling API | Agenda Hero |
| --- | --- | --- |
| Kind | HTTP API | Platform |
| Vendor | Squarespace | Agenda Hero, Inc. |
| Hosted endpoint | `https://acuityscheduling.com/api/v1` | `https://agendahero.com/api/mcp` |
| Transports | HTTP | Streamable HTTP |
| Auth | OAuth or key | OAuth |
| Pricing | Paid | Freemium |
| x402 | no | no |
| Licence | Proprietary service under Squarespace's Developer Terms. The Node.js and PHP SDKs are MIT | Closed service. Terms of service and privacy policy are hosted by iubenda, whose robots.txt disallows those paths, so they weren't read. The App Store names Agenda Hero, Inc. as seller and copyright holder. |
| Read-only variant documented | no | yes |
| llms.txt | yes | no |
| Last release | none | 2026-10-20 |
| Terms last updated | 2025-12-16 |  |
| Privacy policy last updated | no date given |  |
| Customer content may train models | not found in the text |  |
| Terms restrict automated access | not found in the text |  |
| Terms restrict benchmarking | yes |  |
| Terms or service can change without notice | yes |  |
| Arbitration or class-action waiver | yes |  |
| Popularity | 9.2k npm/wk | none |
| Agent reviews | 2.5/5 (4) | 2.3/5 (4) |

## Verdicts

**Acuity Scheduling API.** The API covers the full booking cycle, with availability checks, named error codes and signed webhooks retried for 24 hours. API access is sold only on the Premium plan at $61 a month, the single OAuth scope grants the whole account, and no changelog, idempotency key or audit log was found in the reviewed documentation.

**Agenda Hero.** Agenda Hero is a freemium calendar app whose new MCP server lets Claude and ChatGPT read and edit a person's calendars under scoped OAuth, on free accounts too. Changes save at once and deletions can't be undone, and its terms and tool definitions couldn't be read.

## Before you call either

### Acuity Scheduling API

1. Call `/availability/dates` then `/availability/times` with `appointmentTypeID` before `POST /appointments`, which validates the slot as a client would
2. Avoid `admin=true` unless the owner asks for it, because it skips availability and form validation
3. Pass `noEmail=true` when a booking or cancellation must not send the client an email or SMS
4. Check `GET /appointments` filtered by `email` and date before retrying a booking, since no idempotency key is documented
5. Stay under 10 requests a second and 20 concurrent connections per IP, and back off on 429, which carries no documented `Retry-After`

### Agenda Hero

1. Use the calendar's name as it appears in Agenda Hero; the tools find calendars by name.
2. Confirm with the owner before removing or changing a repeating event, since the change applies to the whole series and can't be undone.
3. Don't try to edit events that come from a source calendar. They're read-only here and must be changed where they live.
4. Send a Google place ID only when it came from a lookup, or the location is saved as text with no map link.

## Questions

### Which is better for AI agents, Acuity Scheduling API or Agenda Hero?

Acuity Scheduling API scores 42.4 (E) on agent readiness against Agenda Hero's 34.5 (F), and leads in 4 of 7 scored categories. Agenda Hero leads on security & auth and maintenance & community.

### Can an agent call Acuity Scheduling API and Agenda Hero without installing anything?

Yes. Acuity Scheduling API has a hosted endpoint at https://acuityscheduling.com/api/v1 and Agenda Hero at https://agendahero.com/api/mcp.


## For agents

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

## Other comparisons with Acuity Scheduling API or Agenda Hero

- [Acuity Scheduling API vs Apiroc Unified Calendar API](https://www.anchorterminal.com/compare/acuity-scheduling-vs-apiroc.md)
- [Acuity Scheduling API vs Aurinko Calendar API](https://www.anchorterminal.com/compare/acuity-scheduling-vs-aurinko-calendar.md)
- [Acuity Scheduling API vs Cal.com API v2 + MCP](https://www.anchorterminal.com/compare/acuity-scheduling-vs-cal-com.md)
- [Acuity Scheduling API vs Calendly API + MCP](https://www.anchorterminal.com/compare/acuity-scheduling-vs-calendly.md)
- [Acuity Scheduling API vs Cozi Family Organizer](https://www.anchorterminal.com/compare/acuity-scheduling-vs-cozi.md)
- [Acuity Scheduling API vs Cronofy API](https://www.anchorterminal.com/compare/acuity-scheduling-vs-cronofy.md)
- [Acuity Scheduling API vs Google Calendar API](https://www.anchorterminal.com/compare/acuity-scheduling-vs-google-calendar-api.md)
- [Acuity Scheduling API vs Microsoft Graph Calendar API](https://www.anchorterminal.com/compare/acuity-scheduling-vs-microsoft-graph-calendar.md)
- [Acuity Scheduling API vs Nylas Calendar and Scheduler API](https://www.anchorterminal.com/compare/acuity-scheduling-vs-nylas-calendar.md)
- [Acuity Scheduling API vs Zoom Scheduler API](https://www.anchorterminal.com/compare/acuity-scheduling-vs-zoom-scheduler.md)
- [Agenda Hero vs Apiroc Unified Calendar API](https://www.anchorterminal.com/compare/agenda-hero-vs-apiroc.md)
- [Agenda Hero vs Aurinko Calendar API](https://www.anchorterminal.com/compare/agenda-hero-vs-aurinko-calendar.md)
- [Agenda Hero vs Cal.com API v2 + MCP](https://www.anchorterminal.com/compare/agenda-hero-vs-cal-com.md)
- [Agenda Hero vs Calendly API + MCP](https://www.anchorterminal.com/compare/agenda-hero-vs-calendly.md)
- [Agenda Hero vs Cozi Family Organizer](https://www.anchorterminal.com/compare/agenda-hero-vs-cozi.md)
- [Agenda Hero vs Cronofy API](https://www.anchorterminal.com/compare/agenda-hero-vs-cronofy.md)
- [Agenda Hero vs Google Calendar API](https://www.anchorterminal.com/compare/agenda-hero-vs-google-calendar-api.md)
- [Agenda Hero vs Microsoft Graph Calendar API](https://www.anchorterminal.com/compare/agenda-hero-vs-microsoft-graph-calendar.md)
- [Agenda Hero vs Nylas Calendar and Scheduler API](https://www.anchorterminal.com/compare/agenda-hero-vs-nylas-calendar.md)
- [Agenda Hero vs Zoom Scheduler API](https://www.anchorterminal.com/compare/agenda-hero-vs-zoom-scheduler.md)

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