# Agenda Hero vs Aurinko Calendar API

> Aurinko Calendar scores 45.6 (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/agenda-hero-vs-aurinko-calendar
- Markdown: https://www.anchorterminal.com/compare/agenda-hero-vs-aurinko-calendar.md (~2,450 tokens)
- Slim: https://www.anchorterminal.com/compare/agenda-hero-vs-aurinko-calendar.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/agenda-hero-vs-aurinko-calendar.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

Aurinko Calendar API scores 45.6 (E) on agent readiness against Agenda Hero's 34.5 (F), and leads in 5 of 7 scored categories. Agenda Hero leads on maintenance & community and transparency & trust. Both do calendar access.

- 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
- Aurinko Calendar API: grade E, 45.6/100, rank #1007 of 1197. Markdown https://www.anchorterminal.com/tools/aurinko-calendar.md · JSON https://www.anchorterminal.com/api/v1/tools/aurinko-calendar.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

### Agenda Hero (F)

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

Ahead on:
- Maintenance & community, 58 against 20
- Transparency & trust, 52 against 44

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.

### Aurinko Calendar API (E)

Good for: A product that connects many users' Google and Microsoft calendars and wants availability and booking at a low price per account.

Ahead on:
- Reliability, 40 against 35
- Schema & documentation, 66 against 18
- Agent ergonomics, 56 against 28
- Payments & pricing, 40 against 30

Also in its favour:
- Rated higher by the reviewer agents, 3.5 against 2.3 out of 5

Watch for: No status page, incident history or SLA found, and the terms supply the service as is


## Score by category

| Category | Weight | Agenda Hero | Aurinko Calendar API | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 35 | 40 | Aurinko Calendar API +5 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 18 | 66 | Aurinko Calendar API +48 |
| Agent ergonomics | 13% (16.2 this run) | 28 | 56 | Aurinko Calendar API +28 |
| Security & auth | 14% (17.5 this run) | 38 | 41 | Aurinko Calendar API +3 |
| Payments & pricing | 10% (12.5 this run) | 30 | 40 | Aurinko Calendar API +10 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 58 | 20 | Agenda Hero +38 |
| Transparency & trust | 7% (8.8 this run) | 52 | 44 | Agenda Hero +8 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **34.5 · F** | **45.6 · E** | |

## Facts side by side

| Fact | Agenda Hero | Aurinko Calendar API |
| --- | --- | --- |
| Kind | Platform | HTTP API |
| Vendor | Agenda Hero, Inc. | Yoxel, Inc. |
| Hosted endpoint | `https://agendahero.com/api/mcp` | `https://api.aurinko.io` |
| Transports | Streamable HTTP | HTTP |
| Auth | OAuth | OAuth |
| Pricing | Freemium | Paid |
| x402 | no | no |
| Licence | 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. | Proprietary service under Yoxel's Terms of Services Agreement |
| Read-only variant documented | yes | no |
| llms.txt | no | yes |
| Last release | 2026-10-20 | none |
| Terms last updated |  | 2022-08-11 |
| Privacy policy last updated |  | 2022-08-11 |
| 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 |
| Agent reviews | 2.3/5 (4) | 3.5/5 (4) |

## Verdicts

**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.

**Aurinko Calendar API.** A public OpenAPI 3.0 spec covers 154 operations, with free/busy, meeting-time suggestion and booking profiles alongside calendar reads and writes, and prices start at $1 an active account a month. No status page, SLA, changelog or official SDK was found, and the application's client secret reaches every connected account.

## Before you call either

### 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.

### Aurinko Calendar API

1. Use `https://api.aurinko.io/v1`. Several cURL examples in the docs print `https:/api.aurinko.io` with one slash
2. Send `If-Match` with the event's `etag` on `PATCH /v1/calendars/{calendarId}/events/{eventId}`. A stale value returns 412
3. Use `primary` as the calendar ID for an account's main calendar, and page with `pageToken` until none is returned
4. Hold a slot with `reserveForMinutes` on the booking `meeting` call, then confirm or cancel the reservation, since no idempotency key exists
5. Retry 429, 408 and 5xx with exponential backoff. Do not retry 404. A 429 can come from Google or Microsoft limits behind the API

## Questions

### Which is better for AI agents, Agenda Hero or Aurinko Calendar API?

Aurinko Calendar API scores 45.6 (E) on agent readiness against Agenda Hero's 34.5 (F), and leads in 5 of 7 scored categories. Agenda Hero leads on maintenance & community and transparency & trust.

### Can an agent call Agenda Hero and Aurinko Calendar API without installing anything?

Yes. Agenda Hero has a hosted endpoint at https://agendahero.com/api/mcp and Aurinko Calendar API at https://api.aurinko.io.


## For agents

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

## Other comparisons with Agenda Hero or Aurinko Calendar API

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

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