chronary 0.4.1

Python client library for the Chronary calendar-as-a-service API

Chronary Python SDK

The official Python client for the Chronary calendar-as-a-service API.

Installation

pip install chronary

Requires Python 3.10+.

Quickstart

Synchronous

from chronary import Chronary

client = Chronary(api_key="chr_sk_...")

# Create a calendar
calendar = client.calendars.create(name="Sales Team", timezone="America/New_York")

# Create an event
event = client.events.create(
    calendar.id,
    title="Strategy Sync",
    start_time="2026-03-28T14:00:00Z",
    end_time="2026-03-28T14:30:00Z",
)

# Check availability
free_slots = client.availability.get(
    "agt_abc123",
    start="2026-03-28T09:00:00Z",
    end="2026-03-28T17:00:00Z",
    slot_duration="30m",
)

Asynchronous

from chronary import AsyncChronary

async with AsyncChronary(api_key="chr_sk_...") as client:
    agent = await client.agents.create(name="Support Bot", type="ai")
    calendars = await client.agents.calendars.list(agent.id)

Configuration

Environment variable

export CHRONARY_API_KEY="chr_sk_..."

# No api_key argument needed when the env var is set
client = Chronary()

Custom options

client = Chronary(
    api_key="chr_sk_...",
    base_url="https://api.chronary.ai",  # default
    timeout=60.0,                         # seconds, default 60
    max_retries=2,                        # default 2
)

Custom httpx client

import httpx

transport = httpx.HTTPTransport(retries=3)
http_client = httpx.Client(transport=transport)

client = Chronary(api_key="chr_sk_...", httpx_client=http_client)

Resources

Resource	Accessor	Methods
Agents	client.agents	create, list, get, update, delete
Calendars	client.calendars	create, list, get, update, delete
Events	client.events	create, list, get, update, delete
Webhooks	client.webhooks	create, list, get, update, delete
iCal Subscriptions	client.ical_subscriptions	create, list, get, update, delete, sync
Availability	client.availability	get, get_calendar, find_meeting_time
Usage	client.usage	get

Agent-scoped resources

# Calendars owned by an agent
client.agents.calendars.create("agt_abc123", name="My Cal", timezone="UTC")
client.agents.calendars.list("agt_abc123")

# Events across all of an agent's calendars
client.agents.events.list("agt_abc123", start_after="2026-03-01T00:00:00Z")

# Agent availability
client.agents.availability.get("agt_abc123", start="...", end="...")

Pagination

List methods return a pager with auto_paging_iter() for transparent pagination:

pager = client.agents.list()

# Iterate through all pages automatically
for agent in pager.auto_paging_iter():
    print(agent.name)

# Or access the current page directly
print(pager.data)       # list of items
print(pager.total)      # total count
print(pager.has_more)   # whether more pages exist

Error handling

from chronary import Chronary, NotFoundError, RateLimitError, APIError

client = Chronary()

try:
    agent = client.agents.get("agt_nonexistent")
except NotFoundError:
    print("Agent not found")
except RateLimitError:
    print("Slow down")
except APIError as e:
    print(f"{e.status_code}: {e.message}")

All errors carry .status_code, .message, .request_id, .error_type, and .body.

Per-request options

Override retries on a per-call basis:

agent = client.agents.get("agt_abc123", max_retries=5)

Webhook verification

Verify incoming webhook signatures using HMAC-SHA256:

from chronary.webhook import verify_signature, SignatureVerificationError

try:
    verify_signature(
        payload=request.body,
        headers=request.headers,
        secret=webhook_secret,
    )
    # signature valid — process the event
except SignatureVerificationError:
    # reject the request (e.g. return 401)
    ...

Request IDs

Every response model carries an _request_id attribute for correlating with server logs:

agent = client.agents.get("agt_abc123")
print(agent._request_id)  # "req_..."

Plans & limits

Chronary enforces a per-key rate limit and per-org monthly quotas that vary by plan:

	Free	Pro
Rate limit	10 req/s	50 req/s
Webhook delivery retries	4	8
Agents	3	50
Calendars	10	250
Events / mo	2,500	125,000
API calls / mo	50,000	1,000,000
Pro-only features	—	Scheduling proposals, temporal holds, cross-calendar availability, per-agent API keys (chr_ak_*)

Pro-only feature calls raise APIError (status 403) on Free. The SDK automatically retries 429 and 5xx responses with exponential backoff (max_retries). See https://docs.chronary.ai/resources/rate-limits/ for the full matrix.

License

Apache-2.0