Billing & Plans

Chronary has a free plan, a paid Pro plan, and a Custom plan for larger teams. Everything about your subscription lives on the Billing page of the console.

Plans at a glance

Pro costs $29/month or $290/year (two months free). Prices exclude tax; any applicable tax is added at checkout. In countries where checkout asks for a business tax ID (including the EU, EEA, UK, Canada and Australia), paid plans are for businesses only, and you’ll need your VAT, GST or business number. Elsewhere, including the US, anyone can subscribe. Custom plans are priced by contract — contact sales.

Metric	Free	Pro	Custom
Agents	3	50	Custom
Calendars	10	250	Custom
iCal Subscriptions	5	100	Custom
Webhook Endpoints	3	25	Custom
Per-Agent API Keys	Not available	50	Custom
Recurring Event Series	5	250	Custom
Events created	2,500/mo	125,000/mo	Custom
API Calls	50,000/mo	1,000,000/mo	Custom
Webhook Deliveries	5,000/mo	250,000/mo	Custom
Availability Queries	10,000/mo	1,000,000/mo	Custom
Scheduling Proposals	Not available	Unlimited	Custom

Pro also unlocks scheduling proposals, temporal holds, cross-agent availability, and agent-scoped API keys. See Plans for the machine-readable catalog.

Upgrade to Pro

1. Open Settings → Billing in the console.
2. Choose Monthly or Annual and select Upgrade to Pro.
3. Complete the secure checkout.

Your account switches to Pro as soon as the payment is confirmed: immediately in the console, and within a few seconds for API keys. The subscription renews automatically each month or year until you cancel.

Note

Only a human can pay. An AI agent that hits a plan limit can request an upgrade — you get an email and approve it from the console.

Manage your subscription

The Billing page shows your plan, price, renewal date and payment status, with these actions:

• Update payment method — change the card used for renewals.
• Invoices & receipts — view and download past invoices. Receipts are also emailed after each payment.
• Switch to annual / monthly — see Switching between monthly and annual.
• Cancel subscription — see Cancelling.

Switching between monthly and annual

• Monthly → annual: takes effect immediately. You’re charged for the year, minus credit for the unused part of the current month.
• Annual → monthly: takes effect immediately. The unused part of your annual plan becomes account credit, which is applied to your next monthly invoices. If your subscription ends, or you close your account, with credit left, we refund it to your original payment method within 30 days.

Cancelling

Cancelling keeps Pro until the end of the period you’ve already paid for, then the account moves to the free plan. Until that date the Billing page shows when Pro ends, and you can resume the subscription with one click. Nothing is charged after you cancel.

Payments are non-refundable except as our Terms of Service describe: for example, if we end your paid plan without cause, or if you close your account because you reject a change to the Terms. To ask for a refund or report a billing error, write to [email protected].

Failed payments

If a renewal payment fails, your account stays on Pro while we retry the card over about two weeks. The console shows a banner asking you to update your payment method, and you’ll get an email. The next retry uses your updated card. If every retry fails, the subscription is cancelled and the account moves to the free plan.

What happens when you move to Free

Whether you cancel or a payment can’t be collected, moving to the free plan never deletes anything:

• Everything you created stays — agents, calendars, events, webhooks and keys keep working.
• New creates over the free limits are blocked until you’re back under them or upgrade again (for example, a new calendar when you already have more than the free allowance).
• You can still clean up Pro features: list and revoke agent-scoped API keys, list and cancel scheduling proposals, and release holds. Existing agent-scoped keys keep authenticating until you revoke them.
• Creating new Pro-only resources (proposals, holds, scoped keys) requires Pro again.

How quotas reset

Monthly quotas (events, API calls, webhook deliveries, availability queries) reset at the start of each calendar month (UTC) — independent of the day your subscription renews. Check your current usage with GET /v1/usage or on the console’s Usage page. See Rate Limits & Quotas for what counts against which limit.

On Pro, the monthly event, availability-query, proposal and webhook-delivery limits are soft: requests past them are still served, and we email the account owner. The monthly API-call limit is enforced on every plan.

Founding members

Accounts that joined during early access become founding members at launch: Pro stays free for at least 60 days, and you can lock in 50% off Pro for your first 12 months by subscribing before that window closes. The Billing page shows your offer and its end date. If you don’t subscribe, the account moves to the free plan when the window ends — with everything kept, as described above.

If you do subscribe, we email you about 18 days before your free period ends with the date and what you’ll be charged, so you can cancel first if you want to. If your billing address is in Washington, DC, we won’t charge you at all unless you choose Continue to paid Pro on the Billing page before the free period ends; otherwise the account moves to the free plan with nothing charged.

For AI agents

Agents can read the account’s plan and billing status, and ask their human to upgrade, but can never pay, cancel, or change payment methods. See Billing API for GET /v1/billing, upgrade requests, and the matching MCP tools. A 403 plan_required or 429 quota_exceeded error links here and includes an upgrade_url (or contact_url on paid plans) to hand to a human.

Questions

Billing and account questions: [email protected]. Custom plans and volume pricing: [email protected].