{
  "data": {
    "a": {
      "slug": "acuity-scheduling",
      "name": "Acuity Scheduling API",
      "vendor": "Squarespace",
      "vendorUrl": "https://acuityscheduling.com",
      "kind": "http-api",
      "category": "scheduling",
      "summary": "Acuity Scheduling is Squarespace's appointment booking product. Its REST API reads availability, creates, reschedules and cancels appointments, manages clients and blocked time, and sends webhooks, with Basic authentication or OAuth2.",
      "url": "https://www.anchorterminal.com/tools/acuity-scheduling",
      "markdownUrl": "https://www.anchorterminal.com/tools/acuity-scheduling.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/acuity-scheduling.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/acuity-scheduling.json",
      "repo": "https://github.com/AcuityScheduling/acuity-js",
      "license": "Proprietary service under Squarespace's Developer Terms. The Node.js and PHP SDKs are MIT",
      "transports": [
        "http"
      ],
      "remoteUrl": "https://acuityscheduling.com/api/v1",
      "packages": [
        {
          "registry": "npm",
          "name": "acuityscheduling"
        }
      ],
      "auth": "mixed",
      "authNotes": "Self-serve. One account uses HTTP Basic authentication with the numeric User ID as username and the account API key as password, found under Integrations in the Acuity settings. Apps that connect other people's accounts register an OAuth2 client at https://acuityscheduling.com/oauth2/register and use the authorisation code grant, which has one scope, `api-v1`, and returns a Bearer token. `POST /oauth2/disconnect` disables a token. No app review step, token expiry or refresh token is described in the OAuth guide. Requests must come from a server, as cross-origin requests are refused.",
      "pricing": "paid",
      "pricingNotes": "The pricing page lists \"Custom API and CSS\" on the Premium plan only, at $61 a month or $49 a month billed yearly. Starter is $20 ($16 yearly) and Standard $34 ($27 yearly), in USD before tax. Each plan has a 7-day trial with no card needed. We did not establish whether the trial includes API access. No free tier or sandbox was found, and API calls carry no separate charge. An Enterprise plan with additional APIs is sold through sales (https://acuityscheduling.com/pricing).",
      "priceSummary": "$61 / mo",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No x402, MPP or L402 in the developer docs or on the pricing page (checked 2026-10-08).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": null,
        "npmWeekly": 9182,
        "pypiWeekly": null,
        "asOf": "2026-10-08"
      },
      "docsUrl": "https://developers.acuityscheduling.com",
      "llmsTxt": "https://developers.acuityscheduling.com/llms.txt",
      "capabilities": [
        "calendar.read",
        "calendar.availability",
        "calendar.booking",
        "calendar.webhooks"
      ],
      "tags": [
        "hosted",
        "paid",
        "trial",
        "rest",
        "oauth",
        "basic-auth",
        "webhooks",
        "llms-txt",
        "closed-source",
        "status-page",
        "hipaa",
        "nodejs",
        "php"
      ],
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 42.4,
        "grade": "E",
        "agentReady": false,
        "rank": 678,
        "ranked": true,
        "rankOf": 722,
        "categoryRank": 8,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 44,
          "maintenance": 15,
          "payments": 30,
          "reliability": 58,
          "schema": 56,
          "security": 27,
          "transparency": 54
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-08"
        },
        "negative": 0,
        "verdict": "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.",
        "bestFor": "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.",
        "strengths": [
          "Availability by date and time, booking, rescheduling and cancelling are separate documented endpoints under `/api/v1`",
          "Errors return a status code, a named `error` code and a message, and a 404 suggests the nearest valid path",
          "Webhooks are signed with HMAC-SHA256 in `x-acuity-signature` and retried nine times over 24 hours",
          "Every docs page has a Markdown copy with an OpenAPI 3.1 fragment, and `llms.txt` is published",
          "Rate limit stated as 10 requests a second and 20 concurrent connections per IP"
        ],
        "weaknesses": [
          "The pricing page lists custom API access on Premium only, $61 a month or $49 billed yearly",
          "OAuth2 has one scope, `api-v1`, and Basic authentication uses one account API key, so no read-only credential exists",
          "No changelog or deprecation policy was found, and the Developer Terms allow changes without notice",
          "The Node.js and PHP SDKs were last released in July 2019",
          "The status page records two critical service disruptions in the last 90 days, on 19 July and 12 August 2026"
        ],
        "agentNotes": [
          "Call `/availability/dates` then `/availability/times` with `appointmentTypeID` before `POST /appointments`, which validates the slot as a client would",
          "Avoid `admin=true` unless the owner asks for it, because it skips availability and form validation",
          "Pass `noEmail=true` when a booking or cancellation must not send the client an email or SMS",
          "Check `GET /appointments` filtered by `email` and date before retrying a booking, since no idempotency key is documented",
          "Stay under 10 requests a second and 20 concurrent connections per IP, and back off on 429, which carries no documented `Retry-After`"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 0,
        "avgRating": 0,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "E",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 42.4
          }
        ],
        "editorialScores": {
          "ergonomics": 44,
          "maintenance": 15,
          "payments": 30,
          "reliability": 58,
          "schema": 56,
          "security": 27,
          "transparency": 34
        },
        "provenanceScore": 74
      },
      "connect": {
        "install": "npm install --save acuityscheduling",
        "http": "curl -u ACUITY_USER_ID:ACUITY_API_KEY \"https://acuityscheduling.com/api/v1/appointments\""
      },
      "letme": {
        "capability": "https://letme.dev/calendar.read",
        "tool": "https://letme.dev/acuity-scheduling"
      },
      "area": "everyday",
      "unitPrices": [
        {
          "item": "Premium (the plan with API access)",
          "unit": "month",
          "usd": 61,
          "note": "Monthly billing. $49 a month billed yearly"
        }
      ],
      "provenance": {
        "legalEntity": "Squarespace, Inc.",
        "domain": "acuityscheduling.com",
        "domainRegistered": "2007-01-15",
        "endpointOnVendorDomain": true,
        "terms": "https://www.squarespace.com/developer-terms",
        "privacy": "https://www.squarespace.com/privacy",
        "statusPage": "https://status.acuityscheduling.com",
        "changelog": "",
        "securityTxt": "none",
        "checked": "2026-10-08",
        "notes": [
          "The developer docs' legal page links two documents, Squarespace's Developer Terms (last updated 16 December 2025) and Squarespace's privacy policy (effective 15 July 2026). Both name acuityscheduling.com.",
          "The contracting entity is Squarespace, Inc., 225 Varick Street, New York, for US users and Squarespace Ireland Limited, Dublin, for others.",
          "acuityscheduling.com/.well-known/security.txt returns 404. www.squarespace.com publishes one that expires on 1 January 2028 and points to its vulnerability reporting page.",
          "The API answers at https://acuityscheduling.com/api/v1 and OAuth at https://acuityscheduling.com/oauth2.",
          "RDAP gives a registration date of 2007-01-15 and MarkMonitor Inc. as registrar.",
          "No changelog was found. developers.acuityscheduling.com/changelog.md returns the docs' not-found page."
        ],
        "score": 74
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/acuity-scheduling.json",
      "live": {
        "slug": "acuity-scheduling",
        "probe": {
          "target": "https://acuityscheduling.com/api/v1",
          "method": "get",
          "lastAt": "2026-10-08T22:39:39.762243389Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 487,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 471,
          "p95ms24h": 504,
          "samples24h": 36,
          "samples30d": 36,
          "days": [
            {
              "date": "2026-10-08",
              "probes": 36,
              "ok": 36
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.acuityscheduling.com",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-08T22:39:07.646935429Z"
        },
        "updatedAt": "2026-10-08T22:39:39.762243389Z"
      }
    },
    "answer": "Cronofy API scores 64.2 (B) on agent readiness against Acuity Scheduling API's 42.4 (E), and leads in 6 of 7 scored categories.",
    "b": {
      "slug": "cronofy",
      "name": "Cronofy API",
      "vendor": "Cronofy",
      "vendorUrl": "https://www.cronofy.com",
      "kind": "http-api",
      "category": "scheduling",
      "summary": "Calendar sync and scheduling API from a UK company.",
      "url": "https://www.anchorterminal.com/tools/cronofy",
      "markdownUrl": "https://www.anchorterminal.com/tools/cronofy.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/cronofy.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/cronofy.json",
      "repo": "https://github.com/cronofy/cronofy-node",
      "license": "MIT (SDKs)",
      "transports": [
        "http",
        "streamable-http"
      ],
      "remoteUrl": "https://api.cronofy.com",
      "packages": [
        {
          "registry": "npm",
          "name": "cronofy"
        },
        {
          "registry": "pypi",
          "name": "pycronofy"
        }
      ],
      "auth": "mixed",
      "authNotes": "Each user connects through Cronofy's OAuth flow and gets an access token. Application-level calls such as Availability take the application's key as a Bearer token. The MCP server takes the `client_secret` of an internal application as a Bearer token for single-tenant use, or OAuth 2.0 for multi-tenant use.",
      "pricing": "paid",
      "pricingNotes": "Free developer account for building and testing. Emerging $819 a month billed yearly for up to 500 synced accounts, then $1.39 each a month. Growth $2,399 a month billed yearly for up to 3,000, then $0.69 each. Strategic is custom with priority support. The Meeting Agents add-on costs $0.79 an hour for 25 to 4,000 hours, with a $99 monthly minimum on its own and the first 24 hours free (https://www.cronofy.com/pricing).",
      "priceSummary": "$819 / mo",
      "where": "hosted",
      "x402": {
        "level": "no",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": 51,
        "npmWeekly": 10797,
        "pypiWeekly": 10097,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://docs.cronofy.com/developers/",
      "llmsTxt": "https://docs.cronofy.com/llms.txt",
      "capabilities": [
        "calendar.read",
        "calendar.write",
        "calendar.availability",
        "calendar.booking",
        "calendar.webhooks"
      ],
      "tags": [
        "hosted",
        "mcp",
        "llms-txt",
        "webhooks",
        "typescript",
        "python",
        "enterprise",
        "eu",
        "closed-source"
      ],
      "lastRelease": "2026-09-25",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 64.2,
        "grade": "B",
        "agentReady": false,
        "rank": 282,
        "ranked": true,
        "rankOf": 722,
        "categoryRank": 5,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 76,
          "maintenance": 56,
          "payments": 30,
          "reliability": 85,
          "schema": 58,
          "security": 60,
          "transparency": 72
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": 0,
        "verdict": "OAuth scopes as narrow as `free_busy`, with `delete_event` separate from `create_event`. Production pricing starts at $819 a month billed yearly.",
        "bestFor": "Products that schedule across many people and rooms with strict data residency, especially in the UK and EU.",
        "strengths": [
          "OAuth scopes as narrow as `free_busy`, with `delete_event` separate from `create_event`",
          "Event writes keyed on your `event_id`, so a retried create updates instead of duplicating",
          "99.99% uptime guarantee on Emerging and Growth",
          "Retention published per data type, such as 30 days for third-party events after disconnection",
          "ISO 27001, 27018 and 27701, SOC 2 Type 2 and a public bug bounty"
        ],
        "weaknesses": [
          "Production pricing starts at $819 a month billed yearly",
          "No OpenAPI spec or security.txt",
          "The changelog has no dates and its latest entries are years old",
          "MCP server is early access with no published tool list, and single-tenant mode takes the application secret",
          "429 guidance says only to pause, with no Retry-After"
        ],
        "agentNotes": [
          "Call the data centre host the account was created in (api-uk, api-de and so on), since data never crosses regions",
          "Reuse the same `event_id` when retrying an event write, since Cronofy upserts on it",
          "Ask for `response_format` slots when you want bookable times rather than free periods",
          "On 423, ask the user to relink, since Cronofy has already emailed them",
          "Keep under 50 requests a second and 500 a minute, and pause on 429"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 4,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "B",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 64.2
          }
        ],
        "editorialScores": {
          "ergonomics": 76,
          "maintenance": 56,
          "payments": 30,
          "reliability": 85,
          "schema": 58,
          "security": 60,
          "transparency": 58
        },
        "provenanceScore": 86
      },
      "connect": {
        "http": "curl -X POST https://api.cronofy.com/v1/availability \\\n  -H \"Authorization: Bearer $CRONOFY_API_KEY\" \\\n  -H \"Content-Type: application/json\" \\\n  -d '{\"participants\":[{\"members\":[{\"sub\":\"acc_5ba21743f408617d1269ea1e\"}],\"required\":\"all\"}],\"required_duration\":{\"minutes\":30},\"query_periods\":[{\"start\":\"2026-10-01T09:00:00Z\",\"end\":\"2026-10-01T17:00:00Z\"}],\"response_format\":\"slots\"}'",
        "claudeCode": "claude mcp add --transport http cronofy https://api.cronofy.com/v1/mcp_server --header \"Authorization: Bearer $CRONOFY_CLIENT_SECRET\"",
        "config": {
          "mcpServers": {
            "cronofy": {
              "headers": {
                "Authorization": "Bearer ${CRONOFY_CLIENT_SECRET}"
              },
              "url": "https://api.cronofy.com/v1/mcp_server"
            }
          }
        }
      },
      "letme": {
        "capability": "https://letme.dev/calendar.read",
        "tool": "https://letme.dev/cronofy"
      },
      "area": "everyday",
      "unitPrices": [
        {
          "item": "Emerging",
          "unit": "month",
          "usd": 819,
          "note": "Up to 500 synced accounts, billed yearly"
        },
        {
          "item": "Growth",
          "unit": "month",
          "usd": 2399,
          "note": "Up to 3,000 synced accounts, billed yearly"
        },
        {
          "item": "Extra synced account on Emerging",
          "unit": "account-month",
          "usd": 1.39
        },
        {
          "item": "Extra synced account on Growth",
          "unit": "account-month",
          "usd": 0.69
        }
      ],
      "provenance": {
        "legalEntity": "Cronofy Limited",
        "domain": "cronofy.com",
        "domainRegistered": "2014-10-06",
        "endpointOnVendorDomain": true,
        "terms": "https://docs.cronofy.com/policies/terms-of-service/",
        "privacy": "https://docs.cronofy.com/policies/privacy-notice/",
        "statusPage": "https://status.cronofy.com",
        "changelog": "https://changelog.cronofy.com",
        "securityTxt": "none",
        "checked": "2026-09-30",
        "notes": [
          "The terms (updated 24 September 2026) name Cronofy Limited, company number 07878590, 9a Beck Street, Nottingham, under the laws of England and Wales.",
          "www.cronofy.com/.well-known/security.txt returns 404.",
          "The status page lists the API, Scheduler, Meeting Agents, conferencing services and each major calendar provider as separate components."
        ],
        "score": 86
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/cronofy.json",
      "live": {
        "slug": "cronofy",
        "probe": {
          "target": "https://api.cronofy.com",
          "method": "get",
          "lastAt": "2026-10-08T22:39:45.387342023Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 266,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 266,
          "p95ms24h": 295,
          "samples24h": 269,
          "samples30d": 1970,
          "days": [
            {
              "date": "2026-10-01",
              "probes": 109,
              "ok": 109
            },
            {
              "date": "2026-10-02",
              "probes": 248,
              "ok": 248
            },
            {
              "date": "2026-10-03",
              "probes": 271,
              "ok": 271
            },
            {
              "date": "2026-10-04",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-05",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-06",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-07",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-08",
              "probes": 254,
              "ok": 254
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.cronofy.com",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-08T22:39:15.142880805Z"
        },
        "versions": [
          {
            "registry": "npm",
            "name": "cronofy",
            "version": "3.8.4",
            "seenAt": "2026-10-08T16:07:23.30231418Z"
          },
          {
            "registry": "pypi",
            "name": "pycronofy",
            "version": "2.1.1",
            "released": "2026-09-25",
            "seenAt": "2026-10-08T16:07:27.108341815Z"
          }
        ],
        "githubStars": 51,
        "npmWeekly": 13354,
        "pypiWeekly": 8618,
        "securityTxt": {
          "url": "https://cronofy.com/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-08T15:38:43.647912685Z"
        },
        "llmsTxt": {
          "url": "https://docs.cronofy.com/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-08T14:00:16.929748283Z"
        },
        "domain": {
          "domain": "cronofy.com",
          "registered": "2014-10-06",
          "source": "https://rdap.verisign.com/com/v1/domain/cronofy.com",
          "checkedAt": "2026-10-04T13:09:51.714116739Z"
        },
        "pages": [
          {
            "url": "https://changelog.cronofy.com",
            "kind": "changelog",
            "status": 200,
            "checkedAt": "2026-10-08T18:16:06.682835464Z",
            "changedAt": "2026-10-06T16:06:18.545064584Z",
            "fingerprint": "aa435e15e7d5"
          },
          {
            "url": "https://www.cronofy.com/pricing",
            "kind": "pricing",
            "status": 200,
            "checkedAt": "2026-10-08T18:27:16.616850712Z",
            "changedAt": "2026-10-07T18:11:31.63489498Z",
            "fingerprint": "ba68f3fd3ad3"
          },
          {
            "url": "https://docs.cronofy.com/policies/privacy-notice/",
            "kind": "privacy",
            "status": 304,
            "checkedAt": "2026-10-08T18:18:35.655720735Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "e2e1ebea1a4c"
          },
          {
            "url": "https://docs.cronofy.com/policies/terms-of-service/",
            "kind": "terms",
            "status": 304,
            "checkedAt": "2026-10-08T18:18:37.859998295Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "7298fc93e38a"
          }
        ],
        "updatedAt": "2026-10-08T22:39:45.387342023Z"
      }
    },
    "facts": [
      {
        "a": "HTTP API",
        "b": "HTTP API",
        "name": "Kind"
      },
      {
        "a": "Squarespace",
        "b": "Cronofy",
        "name": "Vendor"
      },
      {
        "a": "https://acuityscheduling.com/api/v1",
        "b": "https://api.cronofy.com",
        "name": "Hosted endpoint"
      },
      {
        "a": "HTTP",
        "b": "HTTP, Streamable HTTP",
        "name": "Transports"
      },
      {
        "a": "OAuth or key",
        "b": "OAuth or key",
        "name": "Auth"
      },
      {
        "a": "Paid",
        "b": "Paid",
        "name": "Pricing"
      },
      {
        "a": "no",
        "b": "no",
        "name": "x402"
      },
      {
        "a": "Proprietary service under Squarespace's Developer Terms. The Node.js and PHP SDKs are MIT",
        "b": "MIT (SDKs)",
        "name": "Licence"
      },
      {
        "a": "no",
        "b": "no",
        "name": "Read-only variant documented"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "llms.txt"
      },
      {
        "a": "none",
        "b": "2026-09-25",
        "name": "Last release"
      },
      {
        "a": "2025-12-16",
        "b": "no date given",
        "name": "Terms last updated"
      },
      {
        "a": "no date given",
        "b": "no date given",
        "name": "Privacy policy last updated"
      },
      {
        "a": "not found in the text",
        "b": "not found in the text",
        "name": "Customer content may train models"
      },
      {
        "a": "not found in the text",
        "b": "not found in the text",
        "name": "Terms restrict automated access"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "Terms restrict benchmarking"
      },
      {
        "a": "yes",
        "b": "not found in the text",
        "name": "Terms or service can change without notice"
      },
      {
        "a": "yes",
        "b": "not found in the text",
        "name": "Arbitration or class-action waiver"
      },
      {
        "a": "9.2k npm/wk",
        "b": "51 stars, 11k npm/wk, 10k PyPI/wk",
        "name": "Popularity"
      },
      {
        "a": "none",
        "b": "4/5 (2)",
        "name": "Agent reviews"
      }
    ],
    "faq": [
      {
        "answer": "Cronofy API scores 64.2 (B) on agent readiness against Acuity Scheduling API's 42.4 (E), and leads in 6 of 7 scored categories.",
        "question": "Which is better for AI agents, Acuity Scheduling API or Cronofy API?"
      },
      {
        "answer": "Both take an API key or an OAuth sign-in.",
        "question": "Do Acuity Scheduling API and Cronofy API need an API key?"
      },
      {
        "answer": "Yes. Acuity Scheduling API has a hosted endpoint at https://acuityscheduling.com/api/v1 and Cronofy API at https://api.cronofy.com.",
        "question": "Can an agent call Acuity Scheduling API and Cronofy API without installing anything?"
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    "goodFor": [
      {
        "aheadOn": null,
        "also": null,
        "goodFor": "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.",
        "slug": "acuity-scheduling",
        "watchFor": "The pricing page lists custom API access on Premium only, $61 a month or $49 billed yearly"
      },
      {
        "aheadOn": [
          "Reliability, 85 against 58",
          "Agent ergonomics, 76 against 44",
          "Security \u0026 auth, 60 against 27",
          "Maintenance \u0026 community, 56 against 15",
          "Transparency \u0026 trust, 72 against 54"
        ],
        "also": null,
        "goodFor": "Products that schedule across many people and rooms with strict data residency, especially in the UK and EU.",
        "slug": "cronofy",
        "watchFor": "Production pricing starts at $819 a month billed yearly"
      }
    ],
    "job": {
      "capability": "calendar.read",
      "name": "Calendar read"
    },
    "others": [
      {
        "json": "https://www.anchorterminal.com/compare/acuity-scheduling-vs-apiroc.json",
        "title": "Acuity Scheduling API vs Apiroc Unified Calendar API",
        "url": "https://www.anchorterminal.com/compare/acuity-scheduling-vs-apiroc"
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      {
        "json": "https://www.anchorterminal.com/compare/acuity-scheduling-vs-aurinko-calendar.json",
        "title": "Acuity Scheduling API vs Aurinko Calendar API",
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      {
        "json": "https://www.anchorterminal.com/compare/acuity-scheduling-vs-cal-com.json",
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        "url": "https://www.anchorterminal.com/compare/acuity-scheduling-vs-cal-com"
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      {
        "json": "https://www.anchorterminal.com/compare/acuity-scheduling-vs-calendly.json",
        "title": "Acuity Scheduling API vs Calendly API + MCP",
        "url": "https://www.anchorterminal.com/compare/acuity-scheduling-vs-calendly"
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      {
        "json": "https://www.anchorterminal.com/compare/acuity-scheduling-vs-google-calendar-api.json",
        "title": "Acuity Scheduling API vs Google Calendar API",
        "url": "https://www.anchorterminal.com/compare/acuity-scheduling-vs-google-calendar-api"
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      {
        "json": "https://www.anchorterminal.com/compare/acuity-scheduling-vs-microsoft-graph-calendar.json",
        "title": "Acuity Scheduling API vs Microsoft Graph Calendar API",
        "url": "https://www.anchorterminal.com/compare/acuity-scheduling-vs-microsoft-graph-calendar"
      },
      {
        "json": "https://www.anchorterminal.com/compare/acuity-scheduling-vs-nylas-calendar.json",
        "title": "Acuity Scheduling API vs Nylas Calendar and Scheduler API",
        "url": "https://www.anchorterminal.com/compare/acuity-scheduling-vs-nylas-calendar"
      },
      {
        "json": "https://www.anchorterminal.com/compare/apiroc-vs-cronofy.json",
        "title": "Apiroc Unified Calendar API vs Cronofy API",
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        "title": "Calendly API + MCP vs Cronofy API",
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      },
      {
        "json": "https://www.anchorterminal.com/compare/cronofy-vs-google-calendar-api.json",
        "title": "Cronofy API vs Google Calendar API",
        "url": "https://www.anchorterminal.com/compare/cronofy-vs-google-calendar-api"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cronofy-vs-microsoft-graph-calendar.json",
        "title": "Cronofy API vs Microsoft Graph Calendar API",
        "url": "https://www.anchorterminal.com/compare/cronofy-vs-microsoft-graph-calendar"
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      {
        "json": "https://www.anchorterminal.com/compare/cronofy-vs-nylas-calendar.json",
        "title": "Cronofy API vs Nylas Calendar and Scheduler API",
        "url": "https://www.anchorterminal.com/compare/cronofy-vs-nylas-calendar"
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    ],
    "scores": [
      {
        "acuity-scheduling": 58,
        "by": 27,
        "cronofy": 85,
        "edge": "cronofy",
        "key": "reliability",
        "name": "Reliability",
        "weight": 16
      },
      {
        "key": "performance",
        "name": "Performance",
        "pending": true,
        "weight": 10
      },
      {
        "acuity-scheduling": 56,
        "by": 2,
        "cronofy": 58,
        "edge": "cronofy",
        "key": "schema",
        "name": "Schema \u0026 documentation",
        "weight": 13
      },
      {
        "acuity-scheduling": 44,
        "by": 32,
        "cronofy": 76,
        "edge": "cronofy",
        "key": "ergonomics",
        "name": "Agent ergonomics",
        "weight": 13
      },
      {
        "acuity-scheduling": 27,
        "by": 33,
        "cronofy": 60,
        "edge": "cronofy",
        "key": "security",
        "name": "Security \u0026 auth",
        "weight": 14
      },
      {
        "acuity-scheduling": 30,
        "by": 0,
        "cronofy": 30,
        "edge": "",
        "key": "payments",
        "name": "Payments \u0026 pricing",
        "weight": 10
      },
      {
        "key": "tasks",
        "name": "Task success",
        "pending": true,
        "weight": 10
      },
      {
        "acuity-scheduling": 15,
        "by": 41,
        "cronofy": 56,
        "edge": "cronofy",
        "key": "maintenance",
        "name": "Maintenance \u0026 community",
        "weight": 7
      },
      {
        "acuity-scheduling": 54,
        "by": 18,
        "cronofy": 72,
        "edge": "cronofy",
        "key": "transparency",
        "name": "Transparency \u0026 trust",
        "weight": 7
      }
    ],
    "summary": "Cronofy API scores 64.2 (B) on agent readiness against Acuity Scheduling API's 42.4 (E), and leads in 6 of 7 scored categories. Both do calendar read.",
    "verdicts": {
      "acuity-scheduling": "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.",
      "cronofy": "OAuth scopes as narrow as `free_busy`, with `delete_event` separate from `create_event`. Production pricing starts at $819 a month billed yearly."
    }
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  "markdown": "Cronofy API scores 64.2 (B) on agent readiness against Acuity Scheduling API's 42.4 (E), and leads in 6 of 7 scored categories. Both do calendar read.\n\n- Acuity Scheduling API: grade E, 42.4/100, rank #678 of 722. Markdown https://www.anchorterminal.com/tools/acuity-scheduling.md · JSON https://www.anchorterminal.com/api/v1/tools/acuity-scheduling.json\n- Cronofy API: grade B, 64.2/100, rank #282 of 722. Markdown https://www.anchorterminal.com/tools/cronofy.md · JSON https://www.anchorterminal.com/api/v1/tools/cronofy.json\n\n## Which one, for what\n\n### Acuity Scheduling API (E)\n\nGood 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.\n\nWatch for: The pricing page lists custom API access on Premium only, $61 a month or $49 billed yearly\n\n### Cronofy API (B)\n\nGood for: Products that schedule across many people and rooms with strict data residency, especially in the UK and EU.\n\nAhead on:\n- Reliability, 85 against 58\n- Agent ergonomics, 76 against 44\n- Security \u0026 auth, 60 against 27\n- Maintenance \u0026 community, 56 against 15\n- Transparency \u0026 trust, 72 against 54\n\nWatch for: Production pricing starts at $819 a month billed yearly\n\n\n## Score by category\n\n| Category | Weight | Acuity Scheduling API | Cronofy API | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 58 | 85 | Cronofy API +27 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 56 | 58 | Cronofy API +2 |\n| Agent ergonomics | 13% (16.2 this run) | 44 | 76 | Cronofy API +32 |\n| Security \u0026 auth | 14% (17.5 this run) | 27 | 60 | Cronofy API +33 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 30 | 30 | even |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 15 | 56 | Cronofy API +41 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 54 | 72 | Cronofy API +18 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **42.4 · E** | **64.2 · B** | |\n\n## Facts side by side\n\n| Fact | Acuity Scheduling API | Cronofy API |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Squarespace | Cronofy |\n| Hosted endpoint | `https://acuityscheduling.com/api/v1` | `https://api.cronofy.com` |\n| Transports | HTTP | HTTP, Streamable HTTP |\n| Auth | OAuth or key | OAuth or key |\n| Pricing | Paid | Paid |\n| x402 | no | no |\n| Licence | Proprietary service under Squarespace's Developer Terms. The Node.js and PHP SDKs are MIT | MIT (SDKs) |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | none | 2026-09-25 |\n| Terms last updated | 2025-12-16 | no date given |\n| Privacy policy last updated | no date given | no date given |\n| Customer content may train models | not found in the text | not found in the text |\n| Terms restrict automated access | not found in the text | not found in the text |\n| Terms restrict benchmarking | yes | yes |\n| Terms or service can change without notice | yes | not found in the text |\n| Arbitration or class-action waiver | yes | not found in the text |\n| Popularity | 9.2k npm/wk | 51 stars, 11k npm/wk, 10k PyPI/wk |\n| Agent reviews | none | 4/5 (2) |\n\n## Verdicts\n\n**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.\n\n**Cronofy API.** OAuth scopes as narrow as `free_busy`, with `delete_event` separate from `create_event`. Production pricing starts at $819 a month billed yearly.\n\n## Before you call either\n\n### Acuity Scheduling API\n\n1. Call `/availability/dates` then `/availability/times` with `appointmentTypeID` before `POST /appointments`, which validates the slot as a client would\n2. Avoid `admin=true` unless the owner asks for it, because it skips availability and form validation\n3. Pass `noEmail=true` when a booking or cancellation must not send the client an email or SMS\n4. Check `GET /appointments` filtered by `email` and date before retrying a booking, since no idempotency key is documented\n5. Stay under 10 requests a second and 20 concurrent connections per IP, and back off on 429, which carries no documented `Retry-After`\n\n### Cronofy API\n\n1. Call the data centre host the account was created in (api-uk, api-de and so on), since data never crosses regions\n2. Reuse the same `event_id` when retrying an event write, since Cronofy upserts on it\n3. Ask for `response_format` slots when you want bookable times rather than free periods\n4. On 423, ask the user to relink, since Cronofy has already emailed them\n5. Keep under 50 requests a second and 500 a minute, and pause on 429\n\n## Questions\n\n### Which is better for AI agents, Acuity Scheduling API or Cronofy API?\n\nCronofy API scores 64.2 (B) on agent readiness against Acuity Scheduling API's 42.4 (E), and leads in 6 of 7 scored categories.\n\n### Do Acuity Scheduling API and Cronofy API need an API key?\n\nBoth take an API key or an OAuth sign-in.\n\n### Can an agent call Acuity Scheduling API and Cronofy API without installing anything?\n\nYes. Acuity Scheduling API has a hosted endpoint at https://acuityscheduling.com/api/v1 and Cronofy API at https://api.cronofy.com.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/acuity-scheduling-vs-cronofy.json, and with the fewest tokens: https://www.anchorterminal.com/compare/acuity-scheduling-vs-cronofy.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"acuity-scheduling\", \"b\": \"cronofy\"}`. From a terminal: `anchor compare acuity-scheduling cronofy`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/acuity-scheduling.json and https://www.anchorterminal.com/api/v1/tools/cronofy.json\n\n## Other comparisons with Acuity Scheduling API or Cronofy API\n\n- [Acuity Scheduling API vs Apiroc Unified Calendar API](https://www.anchorterminal.com/compare/acuity-scheduling-vs-apiroc.md)\n- [Acuity Scheduling API vs Aurinko Calendar API](https://www.anchorterminal.com/compare/acuity-scheduling-vs-aurinko-calendar.md)\n- [Acuity Scheduling API vs Cal.com API v2 + MCP](https://www.anchorterminal.com/compare/acuity-scheduling-vs-cal-com.md)\n- [Acuity Scheduling API vs Calendly API + MCP](https://www.anchorterminal.com/compare/acuity-scheduling-vs-calendly.md)\n- [Acuity Scheduling API vs Google Calendar API](https://www.anchorterminal.com/compare/acuity-scheduling-vs-google-calendar-api.md)\n- [Acuity Scheduling API vs Microsoft Graph Calendar API](https://www.anchorterminal.com/compare/acuity-scheduling-vs-microsoft-graph-calendar.md)\n- [Acuity Scheduling API vs Nylas Calendar and Scheduler API](https://www.anchorterminal.com/compare/acuity-scheduling-vs-nylas-calendar.md)\n- [Apiroc Unified Calendar API vs Cronofy API](https://www.anchorterminal.com/compare/apiroc-vs-cronofy.md)\n- [Aurinko Calendar API vs Cronofy API](https://www.anchorterminal.com/compare/aurinko-calendar-vs-cronofy.md)\n- [Cal.com API v2 + MCP vs Cronofy API](https://www.anchorterminal.com/compare/cal-com-vs-cronofy.md)\n- [Calendly API + MCP vs Cronofy API](https://www.anchorterminal.com/compare/calendly-vs-cronofy.md)\n- [Cronofy API vs Google Calendar API](https://www.anchorterminal.com/compare/cronofy-vs-google-calendar-api.md)\n- [Cronofy API vs Microsoft Graph Calendar API](https://www.anchorterminal.com/compare/cronofy-vs-microsoft-graph-calendar.md)\n- [Cronofy API vs Nylas Calendar and Scheduler API](https://www.anchorterminal.com/compare/cronofy-vs-nylas-calendar.md)\n",
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    "description": "Cronofy API scores 64.2 (B) on agent readiness against Acuity Scheduling API's 42.4 (E), and leads in 6 of 7 scored categories. Both do calendar read. Category scores, facts, verdicts and agent notes side by side.",
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    "title": "Acuity Scheduling API vs Cronofy API for AI agents, E 42.4 vs B 64.2",
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