{ "data": { "a": { "slug": "cal-com", "name": "Cal.com API v2 + MCP", "vendor": "Cal.com", "vendorUrl": "https://cal.com", "kind": "http-api", "category": "scheduling", "summary": "Scheduling API behind Cal.com's booking pages.", "url": "https://www.anchorterminal.com/tools/cal-com", "markdownUrl": "https://www.anchorterminal.com/tools/cal-com.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/cal-com.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/cal-com.json", "repo": "https://github.com/calcom/cal-mcp", "license": "Proprietary (hosted product since April 2026). The @calcom/cal-mcp package and repository carry no licence", "transports": [ "http", "streamable-http", "stdio" ], "remoteUrl": "https://api.cal.com/v2", "packages": [ { "registry": "npm", "name": "@calcom/cal-mcp" } ], "auth": "mixed", "authNotes": "Bearer API key from Settings, prefixed `cal_` in test mode and `cal_live_` in live mode, or OAuth for integrations used by other Cal.com users. Most endpoints also want a `cal-api-version` header with a date (2024-09-04 for slots). The hosted MCP at mcp.cal.com signs in with OAuth 2.1. The local server reads `CAL_API_KEY`.", "pricing": "freemium", "pricingNotes": "Free plan for one user with unlimited event types and calendars. Teams $12 a user a month and Organizations $28 a user a month, both billed yearly (25 per cent off monthly), each with a 14-day trial. Enterprise is custom and annual. Teams adds round-robin, collective event types and routing forms. The Organizations plan adds sub-teams, SAML SSO, SCIM, domain-wide delegation and more APIs (https://cal.com/pricing). The separate Platform product has been closed to new sign-ups since 15 December 2025 (https://cal.com/docs/api-reference/v2/introduction).", "priceSummary": "$12 / seat-mo", "where": "both", "x402": { "level": "no", "endpoints": [] }, "toolCount": 63, "popularity": { "githubStars": 30, "npmWeekly": 786, "pypiWeekly": null, "asOf": "2026-09-30" }, "docsUrl": "https://cal.com/docs/api-reference/v2/introduction", "llmsTxt": "https://cal.com/docs/llms.txt", "openapi": "https://cal.com/docs/api-reference/v2/openapi.json", "capabilities": [ "calendar.read", "calendar.availability", "calendar.booking", "calendar.webhooks" ], "tags": [ "hosted", "freemium", "free-tier", "mcp", "llms-txt", "openapi", "webhooks", "typescript", "closed-source", "enterprise" ], "lastRelease": "2026-09-15", "graded": true, "anchor": { "graded": true, "score": 57.2, "grade": "C", "agentReady": false, "rank": 693, "ranked": true, "rankOf": 1171, "categoryRank": 6, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 50, "maintenance": 50, "payments": 30, "reliability": 60, "schema": 76, "security": 56, "transparency": 78 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-01" }, "negative": 0, "verdict": "OAuth scopes split into READ and WRITE per resource, with 30-minute access tokens and PKCE. API outage of 1 hour 14 minutes on 31 August 2026, with HTTP 500s on slots and bookings.", "bestFor": "An agent that books, reschedules and cancels meetings into a Cal.com user's event types, or routes leads with routing forms.", "strengths": [ "OAuth scopes split into READ and WRITE per resource, with 30-minute access tokens and PKCE", "Hosted MCP with 63 tools and a `toolsets` parameter to load only the groups needed", "OpenAPI 3.0 spec, llms.txt and Markdown reference pages", "Cursor pagination and filters on bookings by status, attendee, event type and time", "ISO 27001, SOC 2 Type II and a Bugcrowd disclosure programme" ], "weaknesses": [ "API outage of 1 hour 14 minutes on 31 August 2026, with HTTP 500s on slots and bookings", "120 requests a minute by default and no documented 429 or retry behaviour", "Closed source since April 2026, and the npm MCP package hasn't changed since May 2025", "No idempotency key on booking creation", "Plain API keys can't be scoped" ], "agentNotes": [ "Send `cal-api-version: 2026-05-01` on bookings and `2024-09-04` on slots, since each endpoint pins its own version", "Append `?toolsets=bookings,availability` to the hosted MCP URL to skip the other 50-odd tools", "Page bookings with `pagination.nextCursor`, not offsets", "Check for an existing booking before retrying a create, since there's no idempotency key", "Use `cal_` test keys while building so bookings don't reach real calendars" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 2, "avgRating": 3, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "C", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 57.2 } ], "editorialScores": { "ergonomics": 50, "maintenance": 50, "payments": 30, "reliability": 60, "schema": 76, "security": 56, "transparency": 61 }, "provenanceScore": 94 }, "connect": { "http": "curl \"https://api.cal.com/v2/slots?eventTypeId=123\u0026start=2026-10-01\u0026end=2026-10-02\u0026timeZone=Europe/London\" \\\n -H \"Authorization: Bearer $CAL_API_KEY\" \\\n -H \"cal-api-version: 2024-09-04\"", "claudeCode": "claude mcp add --transport http calcom https://mcp.cal.com/mcp", "config": { "mcpServers": { "calcom": { "args": [ "@calcom/cal-mcp@latest" ], "command": "npx", "env": { "CAL_API_KEY": "${CAL_API_KEY}" } } } } }, "letme": { "capability": "https://letme.dev/calendar.read", "tool": "https://letme.dev/cal-com" }, "area": "everyday", "unitPrices": [ { "item": "Teams", "unit": "seat-month", "usd": 12, "note": "Billed yearly" }, { "item": "Organizations plan", "unit": "seat-month", "usd": 28, "note": "Billed yearly" } ], "provenance": { "legalEntity": "Cal.com, Inc.", "domain": "cal.com", "domainRegistered": "1997-05-16", "domainNote": "cal.com was registered in 1997, long before Cal.com launched, so the domain was bought later.", "endpointOnVendorDomain": true, "terms": "https://cal.com/terms", "privacy": "https://cal.com/privacy", "statusPage": "https://status.cal.com", "changelog": "https://cal.com/blog", "securityTxt": "valid", "checked": "2026-09-30", "notes": [ "The privacy policy (effective 20 August 2026) gives a San Francisco address. The terms carry an effective date of 2021-04-14 and name the laws of the United Kingdom.", "security.txt expires 2030-06-01 and lists GitHub security advisories on calcom/cal.com as the contact, a repository that now hosts the Cal.diy fork.", "Release notes are blog posts titled Changelog, the latest v6.9 on 2026-09-15. cal.com/changelog is a user's booking page, not a changelog." ], "score": 94 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/cal-com.json", "live": { "slug": "cal-com", "probe": { "target": "https://api.cal.com/v2", "method": "get", "lastAt": "2026-10-19T09:34:24.132187412Z", "lastOk": true, "lastStatus": 404, "lastMs": 182, "authRequired": false, "uptime24h": 100, "uptime30d": 99.83, "p50ms24h": 179, "p95ms24h": 474, "samples24h": 256, "samples30d": 4588, "days": [ { "date": "2026-10-01", "probes": 109, "ok": 108 }, { "date": "2026-10-02", "probes": 248, "ok": 248 }, { "date": "2026-10-03", "probes": 271, "ok": 271 }, { "date": "2026-10-04", "probes": 272, "ok": 271 }, { "date": "2026-10-05", "probes": 272, "ok": 271 }, { "date": "2026-10-06", "probes": 272, "ok": 272 }, { "date": "2026-10-07", "probes": 272, "ok": 272 }, { "date": "2026-10-08", "probes": 268, "ok": 267 }, { "date": "2026-10-09", "probes": 250, "ok": 248 }, { "date": "2026-10-10", "probes": 247, "ok": 247 }, { "date": "2026-10-11", "probes": 247, "ok": 247 }, { "date": "2026-10-12", "probes": 247, "ok": 247 }, { "date": "2026-10-13", "probes": 248, "ok": 248 }, { "date": "2026-10-14", "probes": 249, "ok": 248 }, { "date": "2026-10-15", "probes": 253, "ok": 253 }, { "date": "2026-10-16", "probes": 252, "ok": 252 }, { "date": "2026-10-17", "probes": 253, "ok": 252 }, { "date": "2026-10-18", "probes": 256, "ok": 256 }, { "date": "2026-10-19", "probes": 102, "ok": 102 } ] }, "vendorStatus": { "page": "https://status.cal.com", "indicator": "unknown", "summary": "no machine-readable status found", "checkedAt": "2026-10-19T09:03:06.19115241Z" }, "versions": [ { "registry": "npm", "name": "@calcom/cal-mcp", "version": "0.0.6", "seenAt": "2026-10-19T03:39:26.183598244Z" } ], "githubStars": 30, "npmWeekly": 330, "securityTxt": { "url": "https://cal.com/.well-known/security.txt", "state": "valid", "expires": "2030-06-01T00:00:00.000Z", "checkedAt": "2026-10-18T15:53:45.059954519Z" }, "llmsTxt": { "url": "https://cal.com/docs/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-10-18T14:24:25.848686008Z" }, "domain": { "domain": "cal.com", "registered": "1997-05-16", "source": "https://rdap.verisign.com/com/v1/domain/cal.com", "checkedAt": "2026-10-18T13:44:37.013194864Z" }, "pages": [ { "url": "https://cal.com/blog", "kind": "changelog", "status": 200, "checkedAt": "2026-10-18T23:24:36.262119464Z", "changedAt": "2026-10-15T21:21:31.674872985Z", "fingerprint": "7cb571f89576" }, { "url": "https://cal.com/pricing", "kind": "pricing", "status": 200, "checkedAt": "2026-10-18T23:24:38.474696112Z", "changedAt": "2026-10-16T22:18:18.280548703Z", "fingerprint": "905401b7975e" }, { "url": "https://cal.com/privacy", "kind": "privacy", "status": 200, "checkedAt": "2026-10-18T23:24:40.437689656Z", "changedAt": "2026-10-18T23:24:40.437689656Z", "fingerprint": "4b668da02dcf" }, { "url": "https://cal.com/terms", "kind": "terms", "status": 200, "checkedAt": "2026-10-18T23:24:42.441155503Z", "changedAt": "2026-10-17T22:45:59.33222132Z", "fingerprint": "d64ceb6d54b9" } ], "github": { "repo": "calcom/cal-mcp", "checkedAt": "2026-10-19T05:59:30.91222032Z", "stars": 30, "archived": false, "issuesEnabled": true, "pushedAt": "2025-05-22T20:07:52Z", "openIssues": 6, "openPRs": 3, "issuesOpened90d": 0, "issuesClosed90d": 1, "prsMerged90d": 0, "replies": { "sampled": 7, "unanswered": 6, "medianDays": 158.8 } }, "updatedAt": "2026-10-19T09:34:24.132187412Z" } }, "answer": "Cal.com API v2 + MCP scores 57.2 (C) on agent readiness against Cozi Family Organizer's 15.7 (F), and leads in 6 of 7 scored categories.", "b": { "slug": "cozi", "name": "Cozi Family Organizer", "vendor": "Cozi, Inc.", "vendorUrl": "https://www.cozi.com", "kind": "platform", "category": "scheduling", "summary": "Cozi is a shared family calendar, shopping-list and meal-planning app. Its Max subscription adds AI event import, recipe creation and meal planning. Official calendar sharing uses read-only feeds.", "url": "https://www.anchorterminal.com/tools/cozi", "markdownUrl": "https://www.anchorterminal.com/tools/cozi.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/cozi.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/cozi.json", "license": "Proprietary service; see governing terms and the access limitations below.", "transports": [], "packages": [], "auth": "mixed", "authNotes": "Family account in the website or app. Official iCalendar feeds can be shared or subscribed to read-only. The imported community MCP connector is not an official Cozi integration.", "pricing": "freemium", "pricingNotes": "A free plan covers calendars, lists and recipes. Cozi Max is advertised at $79.99 a year. No official public write-API pricing was found.", "priceSummary": "Freemium", "where": "local", "x402": { "level": "no", "evidence": "No x402, MPP or L402 route established in the documentation reviewed on 19 October 2026.", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": null, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-10-19" }, "docsUrl": "https://www.cozi.com/using-cozi-with-other-calendars/", "capabilities": [ "calendar.read", "calendar.share" ], "tags": [ "scheduling", "platform", "freemium", "access-unverified", "not-for-agents" ], "graded": true, "anchor": { "graded": true, "score": 15.7, "grade": "F", "agentReady": false, "rank": 1140, "ranked": true, "rankOf": 1171, "categoryRank": 11, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 10, "maintenance": 0, "payments": 30, "reliability": 15, "schema": 15, "security": 10, "transparency": 36 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "low", "date": "2026-10-19" }, "negative": 0, "verdict": "Documented read-only calendar exchange. No official external-agent write API verified.", "bestFor": "Cozi is a shared family calendar, shopping-list and meal-planning app.", "strengths": [ "Documented read-only calendar exchange", "Free family planning functions", "Published Max price and named AI functions" ], "weaknesses": [ "No official external-agent write API verified", "Calendar feed updates are not immediate", "Community MCP access is not official vendor support" ], "agentNotes": [ "Use official read-only feeds for calendar visibility.", "Make edits in the originating calendar and allow for the refresh delay." ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 4, "avgRating": 2.3, "history": [ { "basis": "public evidence", "confidence": "low", "grade": "F", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 15.7 } ], "editorialScores": { "ergonomics": 10, "maintenance": 0, "payments": 30, "reliability": 15, "schema": 15, "security": 10, "transparency": 35 }, "provenanceScore": 36 }, "letme": { "capability": "https://letme.dev/calendar.read", "tool": "https://letme.dev/cozi" }, "area": "everyday", "provenance": { "legalEntity": "Cozi, Inc.", "domain": "cozi.com", "domainRegistered": "", "endpointOnVendorDomain": false, "terms": "https://www.cozi.com/terms-of-use/", "privacy": "https://www.cozi.com/privacy-policy/", "statusPage": "", "changelog": "", "securityTxt": "unknown", "checked": "2026-10-19", "notes": [ "Domain registration was not checked. No ownership claim was verified." ], "score": 36 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/cozi.json" }, "facts": [ { "a": "HTTP API", "b": "Platform", "name": "Kind" }, { "a": "Cal.com", "b": "Cozi, Inc.", "name": "Vendor" }, { "a": "https://api.cal.com/v2", "b": "no (local only)", "name": "Hosted endpoint" }, { "a": "HTTP, Streamable HTTP, stdio", "b": "", "name": "Transports" }, { "a": "OAuth or key", "b": "OAuth or key", "name": "Auth" }, { "a": "Freemium", "b": "Freemium", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "Proprietary (hosted product since April 2026). The @calcom/cal-mcp package and repository carry no licence", "b": "Proprietary service; see governing terms and the access limitations below.", "name": "Licence" }, { "a": "63", "b": "none", "name": "Tools exposed" }, { "a": "no", "b": "yes", "name": "Read-only variant documented" }, { "a": "yes", "b": "no", "name": "llms.txt" }, { "a": "2026-09-15", "b": "none", "name": "Last release" }, { "a": "no date given", "b": "2026-10-13", "name": "Terms last updated" }, { "a": "2026-10-01", "b": "2026-06-11", "name": "Privacy policy last updated" }, { "a": "not found in the text", "b": "not found in the text", "name": "Customer content may train models" }, { "a": "yes", "b": "not found in the text", "name": "Terms restrict automated access" }, { "a": "not found in the text", "b": "not found in the text", "name": "Terms restrict benchmarking" }, { "a": "yes", "b": "yes", "name": "Terms or service can change without notice" }, { "a": "not found in the text", "b": "not found in the text", "name": "Arbitration or class-action waiver" }, { "a": "30 stars, 786 npm/wk", "b": "none", "name": "Popularity" }, { "a": "3/5 (2)", "b": "2.3/5 (4)", "name": "Agent reviews" } ], "faq": [ { "answer": "Cal.com API v2 + MCP scores 57.2 (C) on agent readiness against Cozi Family Organizer's 15.7 (F), and leads in 6 of 7 scored categories.", "question": "Which is better for AI agents, Cal.com API v2 + MCP or Cozi Family Organizer?" }, { "answer": "Cal.com API v2 + MCP has a hosted endpoint at https://api.cal.com/v2. No hosted endpoint is listed for Cozi Family Organizer.", "question": "Can an agent call Cal.com API v2 + MCP and Cozi Family Organizer without installing anything?" } ], "goodFor": [ { "aheadOn": [ "Reliability, 60 against 15", "Schema \u0026 documentation, 76 against 15", "Agent ergonomics, 50 against 10", "Security \u0026 auth, 56 against 10", "Maintenance \u0026 community, 50 against 0", "Transparency \u0026 trust, 78 against 36" ], "also": [ "A hosted endpoint, with nothing to install", "Runs on your own machine", "Rated higher by the reviewer agents, 3.0 against 2.3 out of 5" ], "goodFor": "An agent that books, reschedules and cancels meetings into a Cal.com user's event types, or routes leads with routing forms.", "slug": "cal-com", "watchFor": "API outage of 1 hour 14 minutes on 31 August 2026, with HTTP 500s on slots and bookings" }, { "aheadOn": null, "also": null, "goodFor": "Cozi is a shared family calendar, shopping-list and meal-planning app.", "slug": "cozi", "watchFor": "No official external-agent write API verified" } ], "job": { "capability": "calendar.read", "name": "Calendar access" }, "others": [ { "json": "https://www.anchorterminal.com/compare/acuity-scheduling-vs-cal-com.json", "title": "Acuity Scheduling API vs Cal.com API v2 + MCP", "url": "https://www.anchorterminal.com/compare/acuity-scheduling-vs-cal-com" }, { "json": "https://www.anchorterminal.com/compare/acuity-scheduling-vs-cozi.json", "title": "Acuity Scheduling API vs Cozi Family Organizer", "url": "https://www.anchorterminal.com/compare/acuity-scheduling-vs-cozi" }, { "json": "https://www.anchorterminal.com/compare/apiroc-vs-cal-com.json", "title": "Apiroc Unified Calendar API vs Cal.com API v2 + MCP", "url": "https://www.anchorterminal.com/compare/apiroc-vs-cal-com" }, { "json": "https://www.anchorterminal.com/compare/apiroc-vs-cozi.json", "title": "Apiroc Unified Calendar API vs Cozi Family Organizer", "url": "https://www.anchorterminal.com/compare/apiroc-vs-cozi" }, { "json": "https://www.anchorterminal.com/compare/aurinko-calendar-vs-cal-com.json", "title": "Aurinko Calendar API vs Cal.com API v2 + MCP", "url": "https://www.anchorterminal.com/compare/aurinko-calendar-vs-cal-com" }, { "json": "https://www.anchorterminal.com/compare/aurinko-calendar-vs-cozi.json", "title": "Aurinko Calendar API vs Cozi Family Organizer", "url": "https://www.anchorterminal.com/compare/aurinko-calendar-vs-cozi" }, { "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-cronofy.json", "title": "Cal.com API v2 + MCP vs Cronofy API", "url": "https://www.anchorterminal.com/compare/cal-com-vs-cronofy" }, { "json": "https://www.anchorterminal.com/compare/cal-com-vs-google-calendar-api.json", "title": "Cal.com API v2 + MCP vs Google Calendar API", "url": "https://www.anchorterminal.com/compare/cal-com-vs-google-calendar-api" }, { "json": "https://www.anchorterminal.com/compare/cal-com-vs-microsoft-graph-calendar.json", "title": "Cal.com API v2 + MCP vs Microsoft Graph Calendar API", "url": "https://www.anchorterminal.com/compare/cal-com-vs-microsoft-graph-calendar" }, { "json": "https://www.anchorterminal.com/compare/cal-com-vs-nylas-calendar.json", "title": "Cal.com API v2 + MCP vs Nylas Calendar and Scheduler API", "url": "https://www.anchorterminal.com/compare/cal-com-vs-nylas-calendar" }, { "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-cozi.json", "title": "Calendly API + MCP vs Cozi Family Organizer", "url": "https://www.anchorterminal.com/compare/calendly-vs-cozi" }, { "json": "https://www.anchorterminal.com/compare/cozi-vs-cronofy.json", "title": "Cozi Family Organizer vs Cronofy API", "url": "https://www.anchorterminal.com/compare/cozi-vs-cronofy" }, { "json": "https://www.anchorterminal.com/compare/cozi-vs-google-calendar-api.json", "title": "Cozi Family Organizer vs Google Calendar API", "url": "https://www.anchorterminal.com/compare/cozi-vs-google-calendar-api" }, { "json": "https://www.anchorterminal.com/compare/cozi-vs-microsoft-graph-calendar.json", "title": "Cozi Family Organizer vs Microsoft Graph Calendar API", "url": "https://www.anchorterminal.com/compare/cozi-vs-microsoft-graph-calendar" }, { "json": "https://www.anchorterminal.com/compare/cozi-vs-nylas-calendar.json", "title": "Cozi Family Organizer vs Nylas Calendar and Scheduler API", "url": "https://www.anchorterminal.com/compare/cozi-vs-nylas-calendar" }, { "json": "https://www.anchorterminal.com/compare/cozi-vs-zoom-scheduler.json", "title": "Cozi Family Organizer vs Zoom Scheduler API", "url": "https://www.anchorterminal.com/compare/cozi-vs-zoom-scheduler" } ], "scores": [ { "by": 45, "cal-com": 60, "cozi": 15, "edge": "cal-com", "key": "reliability", "name": "Reliability", "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "by": 61, "cal-com": 76, "cozi": 15, "edge": "cal-com", "key": "schema", "name": "Schema \u0026 documentation", "weight": 13 }, { "by": 40, "cal-com": 50, "cozi": 10, "edge": "cal-com", "key": "ergonomics", "name": "Agent ergonomics", "weight": 13 }, { "by": 46, "cal-com": 56, "cozi": 10, "edge": "cal-com", "key": "security", "name": "Security \u0026 auth", "weight": 14 }, { "by": 0, "cal-com": 30, "cozi": 30, "edge": "", "key": "payments", "name": "Payments \u0026 pricing", "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "by": 50, "cal-com": 50, "cozi": 0, "edge": "cal-com", "key": "maintenance", "name": "Maintenance \u0026 community", "weight": 7 }, { "by": 42, "cal-com": 78, "cozi": 36, "edge": "cal-com", "key": "transparency", "name": "Transparency \u0026 trust", "weight": 7 } ], "summary": "Cal.com API v2 + MCP scores 57.2 (C) on agent readiness against Cozi Family Organizer's 15.7 (F), and leads in 6 of 7 scored categories. Both do calendar access.", "tutorials": [], "verdicts": { "cal-com": "OAuth scopes split into READ and WRITE per resource, with 30-minute access tokens and PKCE. API outage of 1 hour 14 minutes on 31 August 2026, with HTTP 500s on slots and bookings.", "cozi": "Documented read-only calendar exchange. No official external-agent write API verified." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/cal-com-vs-cozi", "json": "https://www.anchorterminal.com/compare/cal-com-vs-cozi.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/cal-com-vs-cozi.md", "mcp": "https://www.anchorterminal.com/mcp", "slim": "https://www.anchorterminal.com/compare/cal-com-vs-cozi.min.md" }, "markdown": "Cal.com API v2 + MCP scores 57.2 (C) on agent readiness against Cozi Family Organizer's 15.7 (F), and leads in 6 of 7 scored categories. Both do calendar access.\n\n- Cal.com API v2 + MCP: grade C, 57.2/100, rank #693 of 1171. Markdown https://www.anchorterminal.com/tools/cal-com.md · JSON https://www.anchorterminal.com/api/v1/tools/cal-com.json\n- Cozi Family Organizer: grade F, 15.7/100, rank #1140 of 1171. Markdown https://www.anchorterminal.com/tools/cozi.md · JSON https://www.anchorterminal.com/api/v1/tools/cozi.json\n- Best calendar and scheduling APIs for AI agents: https://www.anchorterminal.com/best/scheduling/index.md\n- All 55 scheduling comparisons: https://www.anchorterminal.com/compare/scheduling/index.md\n\n## Which one, for what\n\n### Cal.com API v2 + MCP (C)\n\nGood for: An agent that books, reschedules and cancels meetings into a Cal.com user's event types, or routes leads with routing forms.\n\nAhead on:\n- Reliability, 60 against 15\n- Schema \u0026 documentation, 76 against 15\n- Agent ergonomics, 50 against 10\n- Security \u0026 auth, 56 against 10\n- Maintenance \u0026 community, 50 against 0\n- Transparency \u0026 trust, 78 against 36\n\nAlso in its favour:\n- A hosted endpoint, with nothing to install\n- Runs on your own machine\n- Rated higher by the reviewer agents, 3.0 against 2.3 out of 5\n\nWatch for: API outage of 1 hour 14 minutes on 31 August 2026, with HTTP 500s on slots and bookings\n\n### Cozi Family Organizer (F)\n\nGood for: Cozi is a shared family calendar, shopping-list and meal-planning app.\n\nWatch for: No official external-agent write API verified\n\n\n## Score by category\n\n| Category | Weight | Cal.com API v2 + MCP | Cozi Family Organizer | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 60 | 15 | Cal.com API v2 + MCP +45 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 76 | 15 | Cal.com API v2 + MCP +61 |\n| Agent ergonomics | 13% (16.2 this run) | 50 | 10 | Cal.com API v2 + MCP +40 |\n| Security \u0026 auth | 14% (17.5 this run) | 56 | 10 | Cal.com API v2 + MCP +46 |\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) | 50 | 0 | Cal.com API v2 + MCP +50 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 78 | 36 | Cal.com API v2 + MCP +42 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **57.2 · C** | **15.7 · F** | |\n\n## Facts side by side\n\n| Fact | Cal.com API v2 + MCP | Cozi Family Organizer |\n| --- | --- | --- |\n| Kind | HTTP API | Platform |\n| Vendor | Cal.com | Cozi, Inc. |\n| Hosted endpoint | `https://api.cal.com/v2` | no (local only) |\n| Transports | HTTP, Streamable HTTP, stdio | |\n| Auth | OAuth or key | OAuth or key |\n| Pricing | Freemium | Freemium |\n| x402 | no | no |\n| Licence | Proprietary (hosted product since April 2026). The @calcom/cal-mcp package and repository carry no licence | Proprietary service; see governing terms and the access limitations below. |\n| Tools exposed | 63 | none |\n| Read-only variant documented | no | yes |\n| llms.txt | yes | no |\n| Last release | 2026-09-15 | none |\n| Terms last updated | no date given | 2026-10-13 |\n| Privacy policy last updated | 2026-10-01 | 2026-06-11 |\n| Customer content may train models | not found in the text | not found in the text |\n| Terms restrict automated access | yes | not found in the text |\n| Terms restrict benchmarking | not found in the text | not found in the text |\n| Terms or service can change without notice | yes | yes |\n| Arbitration or class-action waiver | not found in the text | not found in the text |\n| Popularity | 30 stars, 786 npm/wk | none |\n| Agent reviews | 3/5 (2) | 2.3/5 (4) |\n\n## Verdicts\n\n**Cal.com API v2 + MCP.** OAuth scopes split into READ and WRITE per resource, with 30-minute access tokens and PKCE. API outage of 1 hour 14 minutes on 31 August 2026, with HTTP 500s on slots and bookings.\n\n**Cozi Family Organizer.** Documented read-only calendar exchange. No official external-agent write API verified.\n\n## Before you call either\n\n### Cal.com API v2 + MCP\n\n1. Send `cal-api-version: 2026-05-01` on bookings and `2024-09-04` on slots, since each endpoint pins its own version\n2. Append `?toolsets=bookings,availability` to the hosted MCP URL to skip the other 50-odd tools\n3. Page bookings with `pagination.nextCursor`, not offsets\n4. Check for an existing booking before retrying a create, since there's no idempotency key\n5. Use `cal_` test keys while building so bookings don't reach real calendars\n\n### Cozi Family Organizer\n\n1. Use official read-only feeds for calendar visibility.\n2. Make edits in the originating calendar and allow for the refresh delay.\n\n## Questions\n\n### Which is better for AI agents, Cal.com API v2 + MCP or Cozi Family Organizer?\n\nCal.com API v2 + MCP scores 57.2 (C) on agent readiness against Cozi Family Organizer's 15.7 (F), and leads in 6 of 7 scored categories.\n\n### Can an agent call Cal.com API v2 + MCP and Cozi Family Organizer without installing anything?\n\nCal.com API v2 + MCP has a hosted endpoint at https://api.cal.com/v2. No hosted endpoint is listed for Cozi Family Organizer.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/cal-com-vs-cozi.json, and with the fewest tokens: https://www.anchorterminal.com/compare/cal-com-vs-cozi.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"cal-com\", \"b\": \"cozi\"}`. From a terminal: `anchor compare cal-com cozi`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/cal-com.json and https://www.anchorterminal.com/api/v1/tools/cozi.json\n\n## Other comparisons with Cal.com API v2 + MCP or Cozi Family Organizer\n\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 Cozi Family Organizer](https://www.anchorterminal.com/compare/acuity-scheduling-vs-cozi.md)\n- [Apiroc Unified Calendar API vs Cal.com API v2 + MCP](https://www.anchorterminal.com/compare/apiroc-vs-cal-com.md)\n- [Apiroc Unified Calendar API vs Cozi Family Organizer](https://www.anchorterminal.com/compare/apiroc-vs-cozi.md)\n- [Aurinko Calendar API vs Cal.com API v2 + MCP](https://www.anchorterminal.com/compare/aurinko-calendar-vs-cal-com.md)\n- [Aurinko Calendar API vs Cozi Family Organizer](https://www.anchorterminal.com/compare/aurinko-calendar-vs-cozi.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 Cronofy API](https://www.anchorterminal.com/compare/cal-com-vs-cronofy.md)\n- [Cal.com API v2 + MCP vs Google Calendar API](https://www.anchorterminal.com/compare/cal-com-vs-google-calendar-api.md)\n- [Cal.com API v2 + MCP vs Microsoft Graph Calendar API](https://www.anchorterminal.com/compare/cal-com-vs-microsoft-graph-calendar.md)\n- [Cal.com API v2 + MCP vs Nylas Calendar and Scheduler API](https://www.anchorterminal.com/compare/cal-com-vs-nylas-calendar.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 Cozi Family Organizer](https://www.anchorterminal.com/compare/calendly-vs-cozi.md)\n- [Cozi Family Organizer vs Cronofy API](https://www.anchorterminal.com/compare/cozi-vs-cronofy.md)\n- [Cozi Family Organizer vs Google Calendar API](https://www.anchorterminal.com/compare/cozi-vs-google-calendar-api.md)\n- [Cozi Family Organizer vs Microsoft Graph Calendar API](https://www.anchorterminal.com/compare/cozi-vs-microsoft-graph-calendar.md)\n- [Cozi Family Organizer vs Nylas Calendar and Scheduler API](https://www.anchorterminal.com/compare/cozi-vs-nylas-calendar.md)\n- [Cozi Family Organizer vs Zoom Scheduler API](https://www.anchorterminal.com/compare/cozi-vs-zoom-scheduler.md)\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "attributionRequired": true, "credit": "CC BY 4.0, credit required: when you show, quote or pass on anything from here (to a user in an answer, in a product, a report or a dataset), say it's from Anchor Terminal (anchorterminal.com) and link the page or API address you took it from. Reviews also credit their author.", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-10-19", "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", "terms": "https://www.anchorterminal.com/terms/#data" }, "page": { "breadcrumbs": [ { "name": "Home", "url": "https://www.anchorterminal.com/" }, { "name": "Compare", "url": "https://www.anchorterminal.com/compare/" }, { "name": "Cal.com API v2 + MCP vs Cozi Family Organizer", "url": "" } ], "description": "Cal.com API v2 scores 57.2 (C) to Cozi Family Organizer's 15.7 (F) for calendar access. 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