Zod schemas and types for the Chronary calendar API — use them to validate incoming webhook payloads at runtime, or to share request/response shapes between your client and server code.

Installation

npm install @chronary/schemas zod
# pnpm add @chronary/schemas zod
# yarn add @chronary/schemas zod

zod is a peer of this package and is already a transitive dep of @chronary/sdk and @chronary/toolkit, so you likely have it installed.

Webhook payload validation

Chronary webhooks put the event type in the X-Chronary-Event-Type header and the payload in the body. Pass both to parseWebhookEvent to get a typed, discriminated result.

import { parseWebhookEvent } from '@chronary/schemas/events';
import { verifySignature } from '@chronary/sdk';

app.post('/webhook', async (req, res) => {
  const rawBody = await req.text();

  // 1. Authenticate with the HMAC signature before trusting anything.
  //    verifySignature reads X-Signature/X-Timestamp from the headers and
  //    throws on a bad/missing signature or a stale timestamp.
  try {
    await verifySignature(rawBody, req.headers, process.env.CHRONARY_WEBHOOK_SECRET!);
  } catch {
    return res.status(401).end();
  }

  // 2. Parse into a typed event (the event type comes from the header).
  const event = parseWebhookEvent(
    req.header('x-chronary-event-type'),
    JSON.parse(rawBody),
  );

  if (!event.success) {
    console.warn('webhook parse failed:', event.error);
    return res.status(400).json({ error: event.error });
  }

  // 3. Narrow by event.type.
  switch (event.event.type) {
    case 'event.created':
      //             ^ TypeScript narrows `event.event.data` to the created payload
      console.log('New event:', event.event.data.event);
      break;
    case 'event.deleted':
      console.log('Deleted:', event.event.data.event_id);
      break;
    case 'proposal.responded':
      console.log(
        `Agent ${event.event.data.agent_id} responded: ${event.event.data.response}`,
      );
      break;
    default:
      console.log('Unhandled event:', event.event.type);
  }

  res.status(200).end();
});

Wire format contract

HTTP method: POST to your webhook URL.
Headers:
- X-Signature — HMAC-SHA256 signature of timestamp + "." + body (verify with @chronary/sdk's verifySignature).
- X-Timestamp — Unix epoch seconds (decimal string, e.g. 1745784205) used in the signature.
- X-Delivery-Id — unique delivery ID (useful for idempotency + debugging).
- X-Chronary-Event-Type — one of the 18 event types in WEBHOOK_EVENT_TYPES.
Body: raw JSON payload (schema depends on the event type).

Forward compatibility

Every payload schema uses .passthrough(). Fields added server-side in the future won't cause existing consumer code to fail parsing — the unknown fields are preserved on the result so you can opt in to reading them.

Request / response schemas

The package re-exports the Zod schemas used by the REST API for creating and updating resources:

import { CreateEventSchema, CreateCalendarSchema } from '@chronary/schemas';

const parsed = CreateEventSchema.parse(req.body);
// parsed is typed as CreateEventInput

Available:

CreateCalendarSchema, UpdateCalendarSchema, ListCalendarsQuerySchema
CreateEventSchema, UpdateEventSchema, ListEventsQuerySchema
CreateAgentSchema, UpdateAgentSchema, ListAgentsQuerySchema
CreateWebhookSchema, UpdateWebhookSchema, ListWebhooksQuerySchema, ListDeliveriesQuerySchema
CreateICalSubscriptionSchema, UpdateICalSubscriptionSchema, ListICalSubscriptionsQuerySchema
CreateProposalSchema, RespondToProposalSchema
WorkingHoursSchema, UpdateAvailabilityRulesSchema, AvailabilityQuerySchema, CrossAgentAvailabilityQuerySchema