# Acuity Scheduling API vs Truto Unified Calendar API (slim)

> Truto Unified Calendar scores 60.4 (C) to Acuity Scheduling's 42.5 (E) for calendar access. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/acuity-scheduling-vs-truto-calendar.md (~4,800 tokens) · this version ~2,580 tokens · JSON https://www.anchorterminal.com/compare/acuity-scheduling-vs-truto-calendar.json · canonical https://www.anchorterminal.com/compare/acuity-scheduling-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 Acuity Scheduling API's 42.5 (E), and leads in 6 of 7 scored categories. Acuity Scheduling API leads on payments & pricing. Both do calendar access.

- Acuity Scheduling API: E 42.5, rank #1276 of 1510 · https://www.anchorterminal.com/tools/acuity-scheduling.min.md
- Truto Unified Calendar API: C 60.4, rank #655 of 1510 · https://www.anchorterminal.com/tools/truto-calendar.min.md
- Acuity Scheduling API, 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 Payments & pricing, 30 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 58; Schema & documentation, 75 against 56; Agent ergonomics, 71 against 44; Security & auth, 52 against 27; Maintenance & community, 50 against 15; Transparency & trust, 61 against 55.

| Category | Acuity Scheduling API | Truto Unified Calendar API |
| --- | --- | --- |
| Reliability (16%) | 58 | 77 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 56 | 75 |
| Agent ergonomics (13%) | 44 | 71 |
| Security & auth (14%) | 27 | 52 |
| Payments & pricing (10%) | 30 | 20 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 15 | 50 |
| Transparency & trust (7%) | 55 | 61 |

| Fact (where they differ) | Acuity Scheduling API | Truto Unified Calendar API |
| --- | --- | --- |
| Vendor | Squarespace | Yin Yang Inc. |
| Hosted endpoint | `https://acuityscheduling.com/api/v1` | no (local only) |
| Transports | HTTP |  |
| Auth | OAuth or key | API key |
| Licence | Proprietary service under Squarespace's Developer Terms. The Node.js and PHP SDKs are MIT | none |
| Last release | none | 2026-10-26 |
| Terms last updated | 2025-12-16 | no date given |
| Privacy policy last updated | no date given | 2024-10-19 |
| Terms restrict benchmarking | yes | not found in the text |
| Terms or service can change without notice | yes | not found in the text |
| Popularity | 9.2k npm/wk | none |
| Agent reviews | 2.5/5 (4) | none |

Why the edge:
- Maintenance & community, Truto Unified Calendar API +35: Acuity Scheduling API 15 (No changelog or release notes found. The docs' own page dates show the OAuth guide edited on 1 October 2026 and the webhooks guide on 25 June 2026, which we count as the latest dated change (10). No three dated entries in 90 days (0). A developer email address and a support form, with no public issue tracker for the API (5). The Node.js and PHP SDKs were last tagged in July 2019 (0). No current package to assess (0). Total 15.); 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.)
- Agent ergonomics, Truto Unified Calendar API +27: Acuity Scheduling API 44 (`max` caps list size and `excludeForms` trims intake forms from appointments. No field selection (10). Filters by date, calendar, type and client, but no cursor or offset is documented, so long lists need date windows (10). Errors carry a status, a named code and a message, and a 404 suggests the nearest path (16). No idempotency key or safe-retry guidance for `POST /appointments` (0). Booking needs five fields and picks a calendar when none is given. SDKs exist for Node.js and PHP, both last released in 2019 (8). Total 44.); 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.)
- Security & auth, Truto Unified Calendar API +25: Acuity Scheduling API 27 (Basic authentication with one account API key, or OAuth2 with the single scope `api-v1`. Tokens can be disabled at `/oauth2/disconnect`. No scoped keys, expiry or rotation documented. Credentials travel in headers only (15). No read-only credential. Client-mode validation is the default and `admin=true` is opt-in (3). Client names, notes and intake form answers written by outsiders reach the model, with no injection guidance found (0). No API audit log found (0). Squarespace runs a vulnerability reporting form, states regular penetration testing and PCI-DSS compliant payment integrations, and signs a HIPAA BAA on Premium. No bug bounty, SOC 2 or ISO 27001 is named, and the product domain has no security.txt (9). Total 27.); Truto Unified Calendar API 52 (API tokens are per environment and sent as Bearer headers; no scopes or expiry for them were found (20 of 30). Per-account MCP servers can be limited to read methods or tags and set to expire, and the customer's connection form can restrict access to specific resources, but the REST token reaches every integrated account in its environment (14 of 20). Event titles, descriptions and attendee text from outside parties pass through, and no prompt-injection guidance was found (0). Plans keep request logs 30 or 90 days (10 of 15). SOC 2 is stated in a 2023 blog post, with no trust page, security.txt or disclosure policy found (8 of 20). 20 + 14 + 0 + 10 + 8 = 52.)
- Reliability, Truto Unified Calendar API +19: Acuity Scheduling API 58 (Graded as a hosted API. Statuspage site at status.acuityscheduling.com with incident history, though one component stands for the whole product (20). In the 90 days to 8 October 2026 the feed shows a critical disruption of 2 hours 5 minutes on 19 July and one of 18 minutes on 12 August, both marked as possibly affecting all users and services, plus a four-day iOS app fault and three minor integration incidents. Read as one major outage (10). 10 requests a second and 20 concurrent connections per IP (15). The 429 body is documented, with no `Retry-After`, backoff advice or idempotency key for booking writes (3). No SLA found, and the Developer Terms disclaim uninterrupted service (0). The v1 API is generally available (10). Total 58.); 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.)
- Schema & documentation, Truto Unified Calendar API +19: Acuity Scheduling API 56 (Each reference page carries an OpenAPI 3.1 fragment for its own operation, generated by the docs platform from hand-written pages. No single downloadable specification was found (15). `llms.txt` is published and every page has a Markdown copy, but the index lists only five of 36 reference pages (8). Pages explain client and admin booking modes and when availability is validated, without when-not-to-use guidance (10). Parameters are typed with required fields, but there are no enums and `datetime` is any string PHP's strtotime accepts (8). Request examples, an error table and per-endpoint error codes (12). The path is versioned as v1, with no changelog found (3). Total 56.); 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.)
- Payments & pricing, Acuity Scheduling API +10: Acuity Scheduling API 30 (No x402, MPP or L402 (0). Plan prices are public, $20, $34 and $61 a month, with nothing per call (10). A 7-day trial needs no card. Whether the trial includes API access was not established (20). A person signs up in a browser and copies the key or approves OAuth (0). Total 30.); 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.)