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Head to head · Calendar access · October 2026 research run

Agenda Hero vs 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. Both do calendar access.

Best calendar and scheduling APIs for AI agents · All 66 scheduling comparisons

Agenda HeroAgenda Hero, Inc. · Platform F34.5/100#1111 of 1190 Aurinko Calendar APIYoxel, Inc. · HTTP API E45.6/100#1005 of 1190

Which one, for what

Agenda Hero F

Best 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

Best 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

CategoryWeight this runAgenda HeroAurinko Calendar APIEdge
Reliability16%203540Aurinko Calendar API +5
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.21866Aurinko Calendar API +48
Agent ergonomics13%16.22856Aurinko Calendar API +28
Security & auth14%17.53841Aurinko Calendar API +3
Payments & pricing10%12.53040Aurinko Calendar API +10
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.85820Agenda Hero +38
Transparency & trust7%8.85244Agenda Hero +8
Negative events≤1500
TotalF 34.5/100E 45.6/100

Facts side by side

FactAgenda HeroAurinko Calendar API
KindPlatformHTTP API
VendorAgenda Hero, Inc.Yoxel, Inc.
Hosted endpointhttps://agendahero.com/api/mcphttps://api.aurinko.io
TransportsStreamable HTTPHTTP
AuthOAuthOAuth
PricingFreemiumPaid
x402nono
LicenceClosed 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 documentedyesno
llms.txtnoyes
Last release2026-10-20none
Terms last updated2022-08-11
Privacy policy last updated2022-08-11
Customer content may train modelsnot found in the text
Terms restrict automated accessyes
Terms restrict benchmarkingyes
Terms or service can change without noticenot found in the text
Arbitration or class-action waiveryes
Agent reviews2.3/5 (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.

Other comparisons with Agenda Hero or Aurinko Calendar API

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