# Aurinko Calendar API vs Truto Unified Calendar API (slim)

> Truto Unified Calendar scores 60.4 (C) to Aurinko Calendar's 31.7 (F) for calendar access. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/aurinko-calendar-vs-truto-calendar.md (~5,100 tokens) · this version ~2,830 tokens · JSON https://www.anchorterminal.com/compare/aurinko-calendar-vs-truto-calendar.json · canonical https://www.anchorterminal.com/compare/aurinko-calendar-vs-truto-calendar
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-11-07
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)

Truto Unified Calendar API scores 60.4 (C) on agent readiness against Aurinko Calendar API's 31.7 (F), and leads in 6 of 7 scored categories. Aurinko Calendar API leads on payments & pricing. Both do calendar access.

- Aurinko Calendar API: F 31.7, rank #1392 of 1486 · https://www.anchorterminal.com/tools/aurinko-calendar.min.md
- Truto Unified Calendar API: C 60.4, rank #652 of 1486 · https://www.anchorterminal.com/tools/truto-calendar.min.md
- Aurinko Calendar API, 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 Payments & pricing, 40 against 20. Also A hosted endpoint, with nothing to install.
- Truto Unified Calendar API, good for Software companies that need their product's agent to read and book across customers' Google, Outlook, Cal.com and Calendly accounts. Ahead on Reliability, 77 against 15; Schema & documentation, 75 against 33; Agent ergonomics, 71 against 42; Security & auth, 52 against 41; Maintenance & community, 50 against 5; Transparency & trust, 61 against 45.

| Category | Aurinko Calendar API | Truto Unified Calendar API |
| --- | --- | --- |
| Reliability (16%) | 15 | 77 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 33 | 75 |
| Agent ergonomics (13%) | 42 | 71 |
| Security & auth (14%) | 41 | 52 |
| Payments & pricing (10%) | 40 | 20 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 5 | 50 |
| Transparency & trust (7%) | 45 | 61 |

| Fact (where they differ) | Aurinko Calendar API | Truto Unified Calendar API |
| --- | --- | --- |
| Vendor | Yoxel, Inc. | Yin Yang Inc. |
| Hosted endpoint | `https://api.aurinko.io` | no (local only) |
| Transports | HTTP |  |
| Auth | OAuth | API key |
| Licence | Proprietary service under Yoxel's Terms of Services Agreement | none |
| Last release | none | 2026-10-26 |
| Terms last updated | 2022-08-11 | no date given |
| Privacy policy last updated | 2022-08-11 | 2024-10-19 |
| Terms restrict automated access | yes | not found in the text |
| Terms restrict benchmarking | yes | not found in the text |
| Agent reviews | 3.5/5 (4) | none |

Why the edge:
- Reliability, Truto Unified Calendar API +62: Aurinko Calendar API 15 (Per the 8 October check, not re-read on 5 November (Yoxel's terms bar robots and data extraction in connection with the Site and Services, so nothing on aurinko.io beyond the terms was requested). Graded as a hosted API. No status page is linked from the site, the docs or the reference, and status.aurinko.io did not resolve on 8 October (0). With no readable incident history the record scores 5. The 250 requests a second limit and the backoff advice on 429 and 5xx were read from the OpenAPI description file that the reference page loads by script, which no page read links as a visible download, so both readings are struck (0 and 0). No SLA found, and the terms supply the service as is (0). The API is at `/v1` with no beta label (10). 0 + 5 + 0 + 0 + 0 + 10 = 15.); Truto Unified Calendar API 77 (Graded as a hosted service on the Unified Calendar API. Better Stack status page with components for api.truto.one health, ping and link-token endpoints and the static IP proxy, with incident history (20). The feed lists "APIs and Dashboard are down" on 29 October 2026 and delayed sync jobs and webhooks on 1 November, which counts as one major outage (10). Truto's own limit is 50 requests every 10 seconds per integrated account, in front of each vendor's (15). A vendor 429 comes back with Retry-After and normalised `ratelimit-limit`, `-remaining` and `-reset` headers, with no idempotency guidance for creates (12 of 15). The Enterprise plan lists an SLA guarantee (10). Generally available (10). 20 + 10 + 15 + 12 + 10 + 10 = 77.)
- Maintenance & community, Truto Unified Calendar API +45: Aurinko Calendar API 5 (Per the 8 October check, not re-read on 5 November (Yoxel's terms bar robots and data extraction in connection with the Site and Services, so nothing on aurinko.io beyond the terms was requested). No changelog or release notes found, so no API change can be dated. Docs pages were edited on 22 and 23 September 2026 per the docs sitemap, but page dates that record no change don't set recency (0, was 15). No dated changelog entries (0). Support is by email at support@aurinko.io, with no public forum or issue tracker found (3). No official SDK. `aurinko-sdk` on npm is unofficial (0). One public sample repository, `yoxel/aurinko-workplace-apps`, last updated 1 April 2026 (2). 0 + 0 + 3 + 0 + 2 = 5.); Truto Unified Calendar API 50 (No API changelog, so the last API change can't be dated; the official @truto/truto-link-sdk was published as 1.3.5 on 26 October 2026, which we take as the latest dated release (20 of 30, since it is the connection widget, not the calendar API). Six Link SDK versions since 8 August (10 of 20, for the same reason). Support through Slack on paid plans, with no public tracker (5 of 15). A CLI and the Link SDK are official, with no API client (10 of 15). Package health not checked (5 of 10). 20 + 10 + 5 + 10 + 5 = 50.)
- Schema & documentation, Truto Unified Calendar API +42: Aurinko Calendar API 33 (Per the 8 October check, not re-read on 5 November (Yoxel's terms bar robots and data extraction in connection with the Site and Services, so nothing on aurinko.io beyond the terms was requested). The OpenAPI 3.0.0 description file at apirefs.aurinko.io/assets/swagger.json is loaded by the Redoc reference page's script, and no page read links it as a visible download, so it isn't credited as a published contract and its counts are struck (0). `llms.txt` and a Markdown copy of every docs page (10). The Calendar, Booking and Group Booking guides say what each part of the API is for. The earlier operation and property counts came from the struck file, and the partial award is held on the guides (8 of 20). Enums and required fields were read only from the struck file (0 of 15). The guides carry cURL examples, some printing `https:/api.aurinko.io` with one slash. The partial award is held on them, and the error body reading from the struck file no longer counts (10 of 15). `/v1` in the path, with no changelog found (5). 0 + 10 + 8 + 0 + 10 + 5 = 33.); Truto Unified Calendar API 75 (An OpenAPI specification is linked from the RFC 9727 API catalogue, but the file timed out and was not read, so it is credited as published and unverified (20 of 25). llms.txt and a Markdown sibling for every page (10). Parameter descriptions say what each does and what it falls back to, such as `end_time` defaulting to the month of `start_time` (15 of 20). Types, required marks and allowed values such as `focus_time` and `out_of_office` (13 of 15). One documented error shape with provider and Truto fields; few request examples on the reference pages read (12 of 15). Deprecated admin endpoints are marked, but no API changelog was found (5 of 15). 20 + 10 + 15 + 13 + 12 + 5 = 75.)
- Agent ergonomics, Truto Unified Calendar API +29: Aurinko Calendar API 42 (Per the 8 October check, not re-read on 5 November (Yoxel's terms bar robots and data extraction in connection with the Site and Services, so nothing on aurinko.io beyond the terms was requested). Graded on the REST API. `returnRecord=false` trims write responses to an ID and reads take `timeMin` and `timeMax`, but no field selection was found (12). `pageToken` on lists, `limit` and `offset` on booking profiles, and delta tokens for incremental sync (16). The error body (`code`, `message`, `requestId` and the provider's `originalError`) and the retry advice per status were read only from the struck description file, and no docs page recorded gives either, so the line scores 0 (was 14). No idempotency keys. `If-Match` with an ETag is required on event updates, and `reserveForMinutes` holds a slot before a booking is confirmed (8). `primary` works as a calendar ID and few parameters are required, but no official SDK was found (6). 12 + 16 + 0 + 8 + 6 = 42.); Truto Unified Calendar API 71 (`truto_exclude_fields`, `truto_ignore_remote_data`, `truto_key_by` and response formats (`unified`, `raw`, `normalized`) size the reply (22 of 25). Query operators such as `[gt]` and `[in]`, `sort_by`, `limit` and cursors, with a meta endpoint that says which filters each vendor supports (18 of 20). Errors name the HTTP status and say whether Truto or the provider failed, with the provider's message extracted (18 of 20). No idempotency key found for creates (5 of 20). Every call needs only the token and `integrated_account_id`; a CLI and the Link SDK exist, with no general API SDK found (8 of 15). 22 + 18 + 18 + 5 + 8 = 71.)
- Payments & pricing, Aurinko Calendar API +20: Aurinko Calendar API 40 (Per the 8 October check, not re-read on 5 November (Yoxel's terms bar robots and data extraction in connection with the Site and Services, so nothing on aurinko.io beyond the terms was requested). No x402, MPP or L402 (0). Prices per active account a month published without login, $1, $1.50 and $2 (20). A 14-day trial with no card (20). Signup is in a browser at app.aurinko.io, and each calendar needs its owner's OAuth consent (0). 0 + 20 + 20 + 0 = 40.); Truto Unified Calendar API 20 (No x402, MPP or L402 (0). Plan prices per connector a year are public, with unlimited calls (10). A free 30-day sandbox is given after a work-email request reviewed within a business day (10 of 20). A person requests access or books a demo (0). 0 + 10 + 10 + 0 = 20.)
- Transparency & trust, Truto Unified Calendar API +16: Aurinko Calendar API 45 (Per the 8 October check, not re-read on 5 November (Yoxel's terms bar robots and data extraction in connection with the Site and Services, so nothing on aurinko.io beyond the terms was requested). Closed service under a Terms of Services Agreement naming Yoxel, Inc. of California, last updated 11 August 2022 (15). The docs say content is passed through and never stored, with only IDs cached, and the privacy policy commits to Google's Limited Use requirements. The policy gives no retention period, and no DPA was found (12). No deprecation policy or dated notices found (0). No sub-processor list or data location. The security statement names no cloud provider (0). 15 + 12 + 0 + 0 = 27. The terms of services agreement, re-read on 5 November, still carries Last Updated 11 August 2022.); Truto Unified Calendar API 61 (Closed service under terms naming Yin Yang Inc. (15 of 30). Truto says it stores no customer data and calls vendors live, logs are kept 30 or 90 days by plan, data is kept 15 days after termination, and a DPA is public (25 of 30). Deprecated admin endpoints are marked with no policy or dates (6 of 20). Enterprise customers can choose a data region and tokens can be stored regionally; no subprocessor list was found (8 of 20). 15 + 25 + 6 + 8 = 54.)