{ "data": { "a": { "slug": "calendly", "name": "Calendly API + MCP", "vendor": "Calendly", "vendorUrl": "https://calendly.com", "kind": "http-api", "category": "scheduling", "summary": "Calendly's scheduling API for availability, bookings, invitees and webhooks, with a hosted MCP server.", "url": "https://www.anchorterminal.com/tools/calendly", "markdownUrl": "https://www.anchorterminal.com/tools/calendly.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/calendly.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/calendly.json", "transports": [ "http", "streamable-http" ], "remoteUrl": "https://api.calendly.com", "packages": [], "auth": "mixed", "authNotes": "Personal access tokens for your own account, OAuth apps for other people's. Both go in the `Authorization: Bearer` header. The hosted MCP uses OAuth 2.1 with PKCE and dynamic client registration only. Only 8 OAuth tokens per user can be requested in a minute.", "pricing": "freemium", "pricingNotes": "Free plan. The pricing page lists Standard at $10 a seat a month and Teams at $16, and says yearly billing saves 17 and 20 per cent. Enterprise starts at $15,000 a year with a 50-seat minimum, in USD only (https://calendly.com/pricing). Booking through the API needs Standard or above (https://developer.calendly.com/api-docs/calendly-api/scheduled-events/create-event-invitee.md).", "priceSummary": "$10 / seat-mo", "where": "hosted", "x402": { "level": "no", "endpoints": [] }, "toolCount": 36, "popularity": { "githubStars": null, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-09-30" }, "docsUrl": "https://developer.calendly.com", "llmsTxt": "https://developer.calendly.com/llms.txt", "openapi": "https://developer.calendly.com/openapi.json", "capabilities": [ "calendar.read", "calendar.availability", "calendar.booking", "calendar.webhooks" ], "tags": [ "hosted", "freemium", "free-tier", "mcp", "llms-txt", "openapi", "webhooks", "oauth", "closed-source", "enterprise" ], "lastRelease": "2026-08-25", "graded": true, "anchor": { "graded": true, "score": 68.3, "grade": "B", "agentReady": false, "rank": 218, "ranked": true, "rankOf": 950, "categoryRank": 3, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 61, "maintenance": 50, "payments": 30, "reliability": 85, "schema": 86, "security": 70, "transparency": 80 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-01" }, "negative": 0, "verdict": "Per-resource OAuth scopes for new apps and personal access tokens, plus read and write scopes on the MCP. Booking through the API needs a paid seat, and Free users get a 403.", "bestFor": "Best when the host already schedules through Calendly and the agent needs to find a slot and book or cancel it.", "strengths": [ "Per-resource OAuth scopes for new apps and personal access tokens, plus read and write scopes on the MCP", "MCP tools annotated with readOnlyHint, destructiveHint and idempotentHint", "OpenAPI 3.1 in JSON and YAML, llms.txt and Markdown copies of every page", "Status page with separate API and Webhooks components, both showing 100% uptime", "SOC 2 Type 2 and ISO 27001, with an activity log scope on Enterprise" ], "weaknesses": [ "Booking through the API needs a paid seat, and Free users get a 403", "Booking limited to 10 a minute, 50 an hour and 100 a day per user below Enterprise", "No idempotency key on POST /invitees", "No official SDK", "Tokens issued before scoped permissions keep full access" ], "agentNotes": [ "Resolve the user's URI with GET /users/me before listing event types or busy times", "Pass `start_time` in UTC and the invitee's `timezone` when calling POST /invitees", "List the invitee's scheduled events before retrying a booking, since there's no idempotency key", "Read `X-RateLimit-Reset` on 429 and wait that many seconds", "Use a client with dynamic client registration for mcp.calendly.com, since it has no static client ID" ], "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": 68.3 } ], "editorialScores": { "ergonomics": 61, "maintenance": 50, "payments": 30, "reliability": 85, "schema": 86, "security": 70, "transparency": 61 }, "provenanceScore": 99 }, "connect": { "http": "curl https://api.calendly.com/users/me -H \"Authorization: Bearer $CALENDLY_TOKEN\"", "claudeCode": "claude mcp add --transport http calendly https://mcp.calendly.com", "config": { "mcpServers": { "calendly": { "url": "https://mcp.calendly.com" } } } }, "letme": { "capability": "https://letme.dev/calendar.read", "tool": "https://letme.dev/calendly" }, "area": "everyday", "unitPrices": [ { "item": "Standard", "unit": "seat-month", "usd": 10, "note": "Headline price on the pricing page, which toggles yearly and monthly billing" }, { "item": "Teams", "unit": "seat-month", "usd": 16, "note": "Headline price on the pricing page, which toggles yearly and monthly billing" } ], "provenance": { "legalEntity": "Calendly, LLC", "domain": "calendly.com", "domainRegistered": "2013-02-26", "endpointOnVendorDomain": true, "terms": "https://calendly.com/legal/customer-terms-conditions", "privacy": "https://calendly.com/legal/privacy-notice", "statusPage": "https://www.calendlystatus.com", "changelog": "https://developer.calendly.com/release-notes", "securityTxt": "valid", "checked": "2026-09-30", "notes": [ "The privacy notice (updated 3 July 2026) names Calendly, LLC and a postal address in Buford, Georgia, and lists EEA and UK representatives.", "security.txt lists security@calendly.com and expires 2027-04-10.", "A developer policy sits at calendly.com/legal/developer-policy alongside the customer terms." ], "score": 99 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/calendly.json", "live": { "slug": "calendly", "probe": { "target": "https://api.calendly.com", "method": "get", "lastAt": "2026-10-10T03:53:23.082396104Z", "lastOk": true, "lastStatus": 401, "lastMs": 108, "lastNote": "asks for credentials", "authRequired": true, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 125, "p95ms24h": 195, "samples24h": 249, "samples30d": 2274, "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": 268, "ok": 268 }, { "date": "2026-10-09", "probes": 250, "ok": 250 }, { "date": "2026-10-10", "probes": 40, "ok": 40 } ] }, "vendorStatus": { "page": "https://www.calendlystatus.com", "indicator": "none", "summary": "All Systems Operational", "checkedAt": "2026-10-10T03:58:02.202364759Z" }, "securityTxt": { "url": "https://calendly.com/.well-known/security.txt", "state": "valid", "expires": "2027-04-10T00:00:00.000Z", "checkedAt": "2026-10-09T15:39:25.246093871Z" }, "llmsTxt": { "url": "https://developer.calendly.com/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-10-09T14:01:34.526907376Z" }, "domain": { "domain": "calendly.com", "registered": "2013-02-26", "source": "https://rdap.verisign.com/com/v1/domain/calendly.com", "checkedAt": "2026-10-04T13:07:34.738480938Z" }, "pages": [ { "url": "https://developer.calendly.com/release-notes", "kind": "changelog", "status": 304, "checkedAt": "2026-10-09T18:35:09.537225527Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "6b8c2bf3ffd2" }, { "url": "https://calendly.com/pricing", "kind": "pricing", "status": 200, "checkedAt": "2026-10-09T18:33:37.217301468Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "d5a9d70a2911" }, { "url": "https://calendly.com/legal/privacy-notice", "kind": "privacy", "status": 200, "checkedAt": "2026-10-09T18:33:35.227482403Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "881ce0a81fb2" }, { "url": "https://calendly.com/legal/customer-terms-conditions", "kind": "terms", "status": 200, "checkedAt": "2026-10-09T18:33:32.896073824Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "b8ae1bf79b38" } ], "updatedAt": "2026-10-10T03:58:02.202364759Z" } }, "answer": "Calendly API + MCP scores 68.3 (B) on agent readiness against Zoom Scheduler API's 50.6 (D), and leads in every scored category.", "b": { "slug": "zoom-scheduler", "name": "Zoom Scheduler API", "vendor": "Zoom Communications, Inc.", "vendorUrl": "https://www.zoom.com", "kind": "http-api", "category": "scheduling", "summary": "Zoom's REST API for Zoom Scheduler, its appointment booking product. It reads schedules, availability and scheduled events, lists open slots, creates and cancels bookings and sends booking webhooks, with OAuth access on api.zoom.us.", "url": "https://www.anchorterminal.com/tools/zoom-scheduler", "markdownUrl": "https://www.anchorterminal.com/tools/zoom-scheduler.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/zoom-scheduler.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/zoom-scheduler.json", "license": "Proprietary service under the Zoom API Licence and Terms of Use", "transports": [ "http" ], "remoteUrl": "https://api.zoom.us/v2", "packages": [], "auth": "oauth", "authNotes": "OAuth 2.0 only. A person creates an app in the Zoom App Marketplace and picks Scheduler scopes. User apps use the authorisation code grant (PKCE supported) and get one-hour access tokens with 90-day refresh tokens. Server-to-Server OAuth apps exchange an account ID, client ID and client secret for a one-hour token with no user step, and an account administrator authorises the scopes. Granular scopes exist per operation, each with an `:admin` variant. The docs show refresh tokens and device codes sent as URL query parameters as one option.", "pricing": "paid", "pricingNotes": "Scheduler costs $5.99 a user a month, or $4.99 billed yearly, and is included in Workplace Business ($21.99 monthly). The pricing page lists \"Connect to Scheduler APIs\" under the paid Scheduler plan. Scheduler Basic is free with no card, with one booking page and one calendar, and whether it can call the API was not established. A 14-day trial is advertised. No per-call charge was found (checked 2026-10-09).", "priceSummary": "$5.99 / seat-mo", "where": "hosted", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the Scheduler reference, the rate limit and OAuth docs or the pricing page (checked 2026-10-09).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": null, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-10-09" }, "docsUrl": "https://developers.zoom.us/docs/api/scheduler/", "llmsTxt": "https://developers.zoom.us/llms.txt", "capabilities": [ "calendar.read", "calendar.availability", "calendar.booking", "calendar.webhooks" ], "tags": [ "hosted", "paid", "free-plan", "rest", "oauth", "webhooks", "llms-txt", "closed-source", "status-page", "soc2", "bug-bounty" ], "lastRelease": "2026-08-17", "graded": true, "anchor": { "graded": true, "score": 50.6, "grade": "D", "agentReady": false, "rank": 767, "ranked": true, "rankOf": 950, "categoryRank": 7, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 43, "maintenance": 28, "payments": 25, "reliability": 63, "schema": 61, "security": 54, "transparency": 69 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-09" }, "negative": 0, "verdict": "Each of the 24 operations has its own granular OAuth scope, and Zoom Scheduler and the REST API are separate components on the status page. No operation moves a booking, no official SDK covers Scheduler, and Zoom's API terms forbid benchmarking or monitoring the service.", "bestFor": "An agent booking into a Zoom Scheduler user's or team's booking pages, with slot lookup, booking, cancellation and two webhooks.", "strengths": [ "Granular OAuth scopes per operation, with separate read, write, update and delete scopes and user and admin variants", "A slot lookup (`GET /scheduler/schedules/{scheduleId}/available_times`) and a booking call (`POST /scheduler/attendee`), added in July and June 2026", "llms.txt and a Markdown copy of the full reference, with request examples and 400, 401, 404, 409, 429 and 500 responses listed", "Rate limits published by plan. Every Scheduler operation is labelled Light, 30 requests a second on Pro", "SOC 2 Type 2 report (October 2024 to October 2025) names Zoom Scheduler and Zoom APIs in scope, and security.txt is valid to 2029" ], "weaknesses": [ "Zoom's API terms (section 3.7.9) forbid using the APIs to monitor availability or performance, or for benchmarking. This matters before any probe is run", "No operation moves a booking. `PATCH /scheduler/events/{eventId}` changes status, notes and no-show marks only", "No idempotency key or safe-retry guidance for booking writes was found in the reviewed documentation", "No official SDK covers Scheduler. Zoom Rivet 0.3.0 has no Scheduler module", "No downloadable OpenAPI file is linked, and the Markdown reference omits query and path parameters", "The API terms allow Zoom to change or deprecate APIs without prior notice and disclaim any uptime guarantee" ], "agentNotes": [ "Call `GET /scheduler/schedules/{scheduleId}/available_times` and book only a spot whose status is `available`", "Send `start_date_time` in ISO 8601 with the booker's IANA `time_zone` to `POST /scheduler/attendee`. Expect 409 on a conflict", "To move a booking, cancel it with `PATCH /scheduler/events/{eventId}` and `status` set to `cancelled`, then book the new slot", "List scheduled events before retrying a booking, because no idempotency key is documented", "Request a new Server-to-Server OAuth token every hour. That grant issues no refresh token" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "D", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 50.6 } ], "editorialScores": { "ergonomics": 43, "maintenance": 28, "payments": 25, "reliability": 63, "schema": 61, "security": 54, "transparency": 59 }, "provenanceScore": 79 }, "connect": { "http": "curl -H \"Authorization: Bearer $ZOOM_ACCESS_TOKEN\" \"https://api.zoom.us/v2/scheduler/schedules\"" }, "letme": { "capability": "https://letme.dev/calendar.read", "tool": "https://letme.dev/zoom-scheduler" }, "area": "everyday", "unitPrices": [ { "item": "Zoom Scheduler (the plan that lists Scheduler API access)", "unit": "seat-month", "usd": 5.99, "note": "Monthly billing. $4.99 a user a month billed yearly" } ], "provenance": { "legalEntity": "Zoom Communications, Inc.", "domain": "zoom.us", "domainRegistered": "", "endpointOnVendorDomain": true, "terms": "https://www.zoom.com/en/trust/legal/zoom-api-license-and-tou/", "privacy": "https://www.zoom.com/en/trust/privacy/privacy-statement/", "statusPage": "https://status.zoom.us", "changelog": "https://developers.zoom.us/changelog/", "securityTxt": "valid", "checked": "2026-10-09", "notes": [ "The Zoom API Licence and Terms of Use (last updated 16 July 2025) and the Privacy Statement (last updated 17 September 2026) both name Zoom Communications, Inc., 55 Almaden Blvd, Suite 600, San Jose, CA 95113.", "The API answers at https://api.zoom.us/v2 and tokens are issued at https://zoom.us/oauth/token. Legal pages sit on www.zoom.com.", "zoom.us/.well-known/security.txt gives a report form, security-reports@zoom.us, a PGP key and an expiry of 31 December 2029.", "status.zoom.us redirects to www.zoomstatus.com, an Atlassian Statuspage site.", "The registration date of zoom.us was not established. rdap.org answered 404 for the domain.", "The account holder's use of Scheduler itself falls under the Zoom Terms of Service (effective 11 August 2023), which the API terms cite for the definition of Customer Content." ], "score": 79 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/zoom-scheduler.json", "live": { "slug": "zoom-scheduler", "probe": { "target": "https://api.zoom.us/v2", "method": "get", "lastAt": "2026-10-10T03:53:51.07216497Z", "lastOk": true, "lastStatus": 404, "lastMs": 173, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 175, "p95ms24h": 303, "samples24h": 125, "samples30d": 125, "days": [ { "date": "2026-10-09", "probes": 85, "ok": 85 }, { "date": "2026-10-10", "probes": 40, "ok": 40 } ] }, "vendorStatus": { "page": "https://status.zoom.us", "indicator": "minor", "summary": "Partially Degraded Service", "checkedAt": "2026-10-10T03:58:52.848555173Z" }, "pages": [ { "url": "https://developers.zoom.us/changelog/", "kind": "changelog", "status": 200, "checkedAt": "2026-10-09T18:36:20.102873356Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "e3b0c44298fc" }, { "url": "https://www.zoom.com/en/trust/privacy/privacy-statement/", "kind": "privacy", "status": 200, "checkedAt": "2026-10-09T18:56:06.989690084Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "91c109d39062" }, { "url": "https://www.zoom.com/en/trust/legal/zoom-api-license-and-tou/", "kind": "terms", "status": 200, "checkedAt": "2026-10-09T18:56:04.552901735Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "c294e7e03b58" } ], "updatedAt": "2026-10-10T03:58:52.848555173Z" } }, "facts": [ { "a": "HTTP API", "b": "HTTP API", "name": "Kind" }, { "a": "Calendly", "b": "Zoom Communications, Inc.", "name": "Vendor" }, { "a": "https://api.calendly.com", "b": "https://api.zoom.us/v2", "name": "Hosted endpoint" }, { "a": "HTTP, Streamable HTTP", "b": "HTTP", "name": "Transports" }, { "a": "OAuth or key", "b": "OAuth", "name": "Auth" }, { "a": "Freemium", "b": "Paid", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "none", "b": "Proprietary service under the Zoom API Licence and Terms of Use", "name": "Licence" }, { "a": "36", "b": "none", "name": "Tools exposed" }, { "a": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "yes", "b": "yes", "name": "llms.txt" }, { "a": "2026-08-25", "b": "2026-08-17", "name": "Last release" }, { "a": "2026-08-05", "b": "2025-07-16", "name": "Terms last updated" }, { "a": "2026-07-03", "b": "2026-09-17", "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": "yes", "name": "Terms restrict automated access" }, { "a": "not found in the text", "b": "yes", "name": "Terms restrict benchmarking" }, { "a": "not found in the text", "b": "yes", "name": "Terms or service can change without notice" }, { "a": "yes", "b": "yes", "name": "Arbitration or class-action waiver" }, { "a": "4/5 (2)", "b": "none", "name": "Agent reviews" } ], "faq": [ { "answer": "Calendly API + MCP scores 68.3 (B) on agent readiness against Zoom Scheduler API's 50.6 (D), and leads in every scored category.", "question": "Which is better for AI agents, Calendly API + MCP or Zoom Scheduler API?" }, { "answer": "Calendly API + MCP takes an API key or an OAuth sign-in. Zoom Scheduler API uses an OAuth sign-in.", "question": "Do Calendly API + MCP and Zoom Scheduler API need an API key?" }, { "answer": "Yes. Calendly API + MCP has a hosted endpoint at https://api.calendly.com and Zoom Scheduler API at https://api.zoom.us/v2.", "question": "Can an agent call Calendly API + MCP and Zoom Scheduler API without installing anything?" } ], "goodFor": [ { "aheadOn": [ "Reliability, 85 against 63", "Schema \u0026 documentation, 86 against 61", "Agent ergonomics, 61 against 43", "Security \u0026 auth, 70 against 54", "Payments \u0026 pricing, 30 against 25", "Maintenance \u0026 community, 50 against 28", "Transparency \u0026 trust, 80 against 69" ], "also": null, "goodFor": "Best when the host already schedules through Calendly and the agent needs to find a slot and book or cancel it.", "slug": "calendly", "watchFor": "Booking through the API needs a paid seat, and Free users get a 403" }, { "aheadOn": null, "also": null, "goodFor": "An agent booking into a Zoom Scheduler user's or team's booking pages, with slot lookup, booking, cancellation and two webhooks.", "slug": "zoom-scheduler", "watchFor": "Zoom's API terms (section 3.7.9) forbid using the APIs to monitor availability or performance, or for benchmarking. This matters before any probe is run" } ], "job": { "capability": "calendar.read", "name": "Calendar access" }, "others": [ { "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" }, { "json": "https://www.anchorterminal.com/compare/acuity-scheduling-vs-zoom-scheduler.json", "title": "Acuity Scheduling API vs Zoom Scheduler API", "url": "https://www.anchorterminal.com/compare/acuity-scheduling-vs-zoom-scheduler" }, { "json": "https://www.anchorterminal.com/compare/apiroc-vs-calendly.json", "title": "Apiroc Unified Calendar API vs Calendly API + MCP", "url": "https://www.anchorterminal.com/compare/apiroc-vs-calendly" }, { "json": "https://www.anchorterminal.com/compare/apiroc-vs-zoom-scheduler.json", "title": "Apiroc Unified Calendar API vs Zoom Scheduler API", "url": "https://www.anchorterminal.com/compare/apiroc-vs-zoom-scheduler" }, { "json": "https://www.anchorterminal.com/compare/aurinko-calendar-vs-calendly.json", "title": "Aurinko Calendar API vs Calendly API + MCP", "url": "https://www.anchorterminal.com/compare/aurinko-calendar-vs-calendly" }, { "json": "https://www.anchorterminal.com/compare/aurinko-calendar-vs-zoom-scheduler.json", "title": "Aurinko Calendar API vs Zoom Scheduler API", "url": "https://www.anchorterminal.com/compare/aurinko-calendar-vs-zoom-scheduler" }, { "json": "https://www.anchorterminal.com/compare/cal-com-vs-calendly.json", "title": "Cal.com API v2 + MCP vs Calendly API + MCP", "url": "https://www.anchorterminal.com/compare/cal-com-vs-calendly" }, { "json": "https://www.anchorterminal.com/compare/cal-com-vs-zoom-scheduler.json", "title": "Cal.com API v2 + MCP vs Zoom Scheduler API", "url": "https://www.anchorterminal.com/compare/cal-com-vs-zoom-scheduler" }, { "json": "https://www.anchorterminal.com/compare/calendly-vs-cronofy.json", "title": "Calendly API + MCP vs Cronofy API", "url": "https://www.anchorterminal.com/compare/calendly-vs-cronofy" }, { "json": "https://www.anchorterminal.com/compare/calendly-vs-google-calendar-api.json", "title": "Calendly API + MCP vs Google Calendar API", "url": "https://www.anchorterminal.com/compare/calendly-vs-google-calendar-api" }, { "json": "https://www.anchorterminal.com/compare/calendly-vs-microsoft-graph-calendar.json", "title": "Calendly API + MCP vs Microsoft Graph Calendar API", "url": "https://www.anchorterminal.com/compare/calendly-vs-microsoft-graph-calendar" }, { "json": "https://www.anchorterminal.com/compare/calendly-vs-nylas-calendar.json", "title": "Calendly API + MCP vs Nylas Calendar and Scheduler API", "url": "https://www.anchorterminal.com/compare/calendly-vs-nylas-calendar" }, { "json": "https://www.anchorterminal.com/compare/cronofy-vs-zoom-scheduler.json", "title": "Cronofy API vs Zoom Scheduler API", "url": "https://www.anchorterminal.com/compare/cronofy-vs-zoom-scheduler" }, { "json": "https://www.anchorterminal.com/compare/google-calendar-api-vs-zoom-scheduler.json", "title": "Google Calendar API vs Zoom Scheduler API", "url": "https://www.anchorterminal.com/compare/google-calendar-api-vs-zoom-scheduler" }, { "json": "https://www.anchorterminal.com/compare/microsoft-graph-calendar-vs-zoom-scheduler.json", "title": "Microsoft Graph Calendar API vs Zoom Scheduler API", "url": "https://www.anchorterminal.com/compare/microsoft-graph-calendar-vs-zoom-scheduler" }, { "json": "https://www.anchorterminal.com/compare/nylas-calendar-vs-zoom-scheduler.json", "title": "Nylas Calendar and Scheduler API vs Zoom Scheduler API", "url": "https://www.anchorterminal.com/compare/nylas-calendar-vs-zoom-scheduler" } ], "scores": [ { "by": 22, "calendly": 85, "edge": "calendly", "key": "reliability", "name": "Reliability", "weight": 16, "zoom-scheduler": 63 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "by": 25, "calendly": 86, "edge": "calendly", "key": "schema", "name": "Schema \u0026 documentation", "weight": 13, "zoom-scheduler": 61 }, { "by": 18, "calendly": 61, "edge": "calendly", "key": "ergonomics", "name": "Agent ergonomics", "weight": 13, "zoom-scheduler": 43 }, { "by": 16, "calendly": 70, "edge": "calendly", "key": "security", "name": "Security \u0026 auth", "weight": 14, "zoom-scheduler": 54 }, { "by": 5, "calendly": 30, "edge": "calendly", "key": "payments", "name": "Payments \u0026 pricing", "weight": 10, "zoom-scheduler": 25 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "by": 22, "calendly": 50, "edge": "calendly", "key": "maintenance", "name": "Maintenance \u0026 community", "weight": 7, "zoom-scheduler": 28 }, { "by": 11, "calendly": 80, "edge": "calendly", "key": "transparency", "name": "Transparency \u0026 trust", "weight": 7, "zoom-scheduler": 69 } ], "summary": "Calendly API + MCP scores 68.3 (B) on agent readiness against Zoom Scheduler API's 50.6 (D), and leads in every scored category. Both do calendar access.", "verdicts": { "calendly": "Per-resource OAuth scopes for new apps and personal access tokens, plus read and write scopes on the MCP. Booking through the API needs a paid seat, and Free users get a 403.", "zoom-scheduler": "Each of the 24 operations has its own granular OAuth scope, and Zoom Scheduler and the REST API are separate components on the status page. No operation moves a booking, no official SDK covers Scheduler, and Zoom's API terms forbid benchmarking or monitoring the service." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/calendly-vs-zoom-scheduler", "json": "https://www.anchorterminal.com/compare/calendly-vs-zoom-scheduler.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/calendly-vs-zoom-scheduler.md", "slim": "https://www.anchorterminal.com/compare/calendly-vs-zoom-scheduler.min.md" }, "markdown": "Calendly API + MCP scores 68.3 (B) on agent readiness against Zoom Scheduler API's 50.6 (D), and leads in every scored category. Both do calendar access.\n\n- Calendly API + MCP: grade B, 68.3/100, rank #218 of 950. Markdown https://www.anchorterminal.com/tools/calendly.md · JSON https://www.anchorterminal.com/api/v1/tools/calendly.json\n- Zoom Scheduler API: grade D, 50.6/100, rank #767 of 950. Markdown https://www.anchorterminal.com/tools/zoom-scheduler.md · JSON https://www.anchorterminal.com/api/v1/tools/zoom-scheduler.json\n- Best calendar and scheduling APIs for AI agents: https://www.anchorterminal.com/best/scheduling/index.md\n- All 45 scheduling comparisons: https://www.anchorterminal.com/compare/scheduling/index.md\n\n## Which one, for what\n\n### Calendly API + MCP (B)\n\nGood for: Best when the host already schedules through Calendly and the agent needs to find a slot and book or cancel it.\n\nAhead on:\n- Reliability, 85 against 63\n- Schema \u0026 documentation, 86 against 61\n- Agent ergonomics, 61 against 43\n- Security \u0026 auth, 70 against 54\n- Payments \u0026 pricing, 30 against 25\n- Maintenance \u0026 community, 50 against 28\n- Transparency \u0026 trust, 80 against 69\n\nWatch for: Booking through the API needs a paid seat, and Free users get a 403\n\n### Zoom Scheduler API (D)\n\nGood for: An agent booking into a Zoom Scheduler user's or team's booking pages, with slot lookup, booking, cancellation and two webhooks.\n\nWatch for: Zoom's API terms (section 3.7.9) forbid using the APIs to monitor availability or performance, or for benchmarking. This matters before any probe is run\n\n\n## Score by category\n\n| Category | Weight | Calendly API + MCP | Zoom Scheduler API | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 85 | 63 | Calendly API + MCP +22 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 86 | 61 | Calendly API + MCP +25 |\n| Agent ergonomics | 13% (16.2 this run) | 61 | 43 | Calendly API + MCP +18 |\n| Security \u0026 auth | 14% (17.5 this run) | 70 | 54 | Calendly API + MCP +16 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 30 | 25 | Calendly API + MCP +5 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 50 | 28 | Calendly API + MCP +22 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 80 | 69 | Calendly API + MCP +11 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **68.3 · B** | **50.6 · D** | |\n\n## Facts side by side\n\n| Fact | Calendly API + MCP | Zoom Scheduler API |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Calendly | Zoom Communications, Inc. |\n| Hosted endpoint | `https://api.calendly.com` | `https://api.zoom.us/v2` |\n| Transports | HTTP, Streamable HTTP | HTTP |\n| Auth | OAuth or key | OAuth |\n| Pricing | Freemium | Paid |\n| x402 | no | no |\n| Licence | none | Proprietary service under the Zoom API Licence and Terms of Use |\n| Tools exposed | 36 | none |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | 2026-08-25 | 2026-08-17 |\n| Terms last updated | 2026-08-05 | 2025-07-16 |\n| Privacy policy last updated | 2026-07-03 | 2026-09-17 |\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 | yes |\n| Terms restrict benchmarking | not found in the text | yes |\n| Terms or service can change without notice | not found in the text | yes |\n| Arbitration or class-action waiver | yes | yes |\n| Agent reviews | 4/5 (2) | none |\n\n## Verdicts\n\n**Calendly API + MCP.** Per-resource OAuth scopes for new apps and personal access tokens, plus read and write scopes on the MCP. Booking through the API needs a paid seat, and Free users get a 403.\n\n**Zoom Scheduler API.** Each of the 24 operations has its own granular OAuth scope, and Zoom Scheduler and the REST API are separate components on the status page. No operation moves a booking, no official SDK covers Scheduler, and Zoom's API terms forbid benchmarking or monitoring the service.\n\n## Before you call either\n\n### Calendly API + MCP\n\n1. Resolve the user's URI with GET /users/me before listing event types or busy times\n2. Pass `start_time` in UTC and the invitee's `timezone` when calling POST /invitees\n3. List the invitee's scheduled events before retrying a booking, since there's no idempotency key\n4. Read `X-RateLimit-Reset` on 429 and wait that many seconds\n5. Use a client with dynamic client registration for mcp.calendly.com, since it has no static client ID\n\n### Zoom Scheduler API\n\n1. Call `GET /scheduler/schedules/{scheduleId}/available_times` and book only a spot whose status is `available`\n2. Send `start_date_time` in ISO 8601 with the booker's IANA `time_zone` to `POST /scheduler/attendee`. Expect 409 on a conflict\n3. To move a booking, cancel it with `PATCH /scheduler/events/{eventId}` and `status` set to `cancelled`, then book the new slot\n4. List scheduled events before retrying a booking, because no idempotency key is documented\n5. Request a new Server-to-Server OAuth token every hour. That grant issues no refresh token\n\n## Questions\n\n### Which is better for AI agents, Calendly API + MCP or Zoom Scheduler API?\n\nCalendly API + MCP scores 68.3 (B) on agent readiness against Zoom Scheduler API's 50.6 (D), and leads in every scored category.\n\n### Do Calendly API + MCP and Zoom Scheduler API need an API key?\n\nCalendly API + MCP takes an API key or an OAuth sign-in. Zoom Scheduler API uses an OAuth sign-in.\n\n### Can an agent call Calendly API + MCP and Zoom Scheduler API without installing anything?\n\nYes. Calendly API + MCP has a hosted endpoint at https://api.calendly.com and Zoom Scheduler API at https://api.zoom.us/v2.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/calendly-vs-zoom-scheduler.json, and with the fewest tokens: https://www.anchorterminal.com/compare/calendly-vs-zoom-scheduler.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"calendly\", \"b\": \"zoom-scheduler\"}`. From a terminal: `anchor compare calendly zoom-scheduler`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/calendly.json and https://www.anchorterminal.com/api/v1/tools/zoom-scheduler.json\n\n## Other comparisons with Calendly API + MCP or Zoom Scheduler API\n\n- [Acuity Scheduling API vs Calendly API + MCP](https://www.anchorterminal.com/compare/acuity-scheduling-vs-calendly.md)\n- [Acuity Scheduling API vs Zoom Scheduler API](https://www.anchorterminal.com/compare/acuity-scheduling-vs-zoom-scheduler.md)\n- [Apiroc Unified Calendar API vs Calendly API + MCP](https://www.anchorterminal.com/compare/apiroc-vs-calendly.md)\n- [Apiroc Unified Calendar API vs Zoom Scheduler API](https://www.anchorterminal.com/compare/apiroc-vs-zoom-scheduler.md)\n- [Aurinko Calendar API vs Calendly API + MCP](https://www.anchorterminal.com/compare/aurinko-calendar-vs-calendly.md)\n- [Aurinko Calendar API vs Zoom Scheduler API](https://www.anchorterminal.com/compare/aurinko-calendar-vs-zoom-scheduler.md)\n- [Cal.com API v2 + MCP vs Calendly API + MCP](https://www.anchorterminal.com/compare/cal-com-vs-calendly.md)\n- [Cal.com API v2 + MCP vs Zoom Scheduler API](https://www.anchorterminal.com/compare/cal-com-vs-zoom-scheduler.md)\n- [Calendly API + MCP vs Cronofy API](https://www.anchorterminal.com/compare/calendly-vs-cronofy.md)\n- [Calendly API + MCP vs Google Calendar API](https://www.anchorterminal.com/compare/calendly-vs-google-calendar-api.md)\n- [Calendly API + MCP vs Microsoft Graph Calendar API](https://www.anchorterminal.com/compare/calendly-vs-microsoft-graph-calendar.md)\n- [Calendly API + MCP vs Nylas Calendar and Scheduler API](https://www.anchorterminal.com/compare/calendly-vs-nylas-calendar.md)\n- [Cronofy API vs Zoom Scheduler API](https://www.anchorterminal.com/compare/cronofy-vs-zoom-scheduler.md)\n- [Google Calendar API vs Zoom Scheduler API](https://www.anchorterminal.com/compare/google-calendar-api-vs-zoom-scheduler.md)\n- [Microsoft Graph Calendar API vs Zoom Scheduler API](https://www.anchorterminal.com/compare/microsoft-graph-calendar-vs-zoom-scheduler.md)\n- [Nylas Calendar and Scheduler API vs Zoom Scheduler API](https://www.anchorterminal.com/compare/nylas-calendar-vs-zoom-scheduler.md)\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-10-10", "license": "CC-BY-4.0", "method": "https://www.anchorterminal.com/benchmark/", "methodology": "0.4", "openapi": "https://www.anchorterminal.com/openapi.json", "preview": false, "run": "2026-10-01", "runLabel": "October 2026 research run" }, "page": { "breadcrumbs": [ { "name": "Home", "url": "https://www.anchorterminal.com/" }, { "name": "Compare", "url": "https://www.anchorterminal.com/compare/" }, { "name": "Calendly API + MCP vs Zoom Scheduler API", "url": "" } ], "description": "Calendly scores 68.3 (B) to Zoom Scheduler's 50.6 (D) for calendar access. Prices, MCP, x402, uptime and agent notes side by side.", "facts": [ "Calendly API + MCP B 68.3", "Zoom Scheduler API D 50.6", "scores" ], "h1": "Calendly API + MCP vs Zoom Scheduler API", "image": "https://www.anchorterminal.com/assets/og/compare-calendly-vs-zoom-scheduler.png", "path": "/compare/calendly-vs-zoom-scheduler", "published": "2026-10-01", "section": "tools", "title": "Calendly vs Zoom Scheduler for AI agents in 2026: scores and prices", "toc": null, "updated": "2026-10-09", "url": "https://www.anchorterminal.com/compare/calendly-vs-zoom-scheduler" }, "tokens": { "markdown": 2250, "slim": 630 }, "version": 1 }