Factorial API Sdks

Factorial API SDKs

Official SDKs that wrap the Factorial public API with a domain-namespaced client, pagination helpers, and clean auth. This skill teaches an agent how to use them and how to work with Factorial webhooks. Generated reference data lives in reference/ (see References).

• TypeScript: @factorialco/api-client (npm)
• Python: factorial-api-client (PyPI)
• Ruby: factorial_api (RubyGems)

Install

npm install @factorialco/api-client     # TypeScript
pip install factorial-api-client          # Python
gem install factorial_api                 # Ruby

Authentication

Provide either an API key or an OAuth token (or both):

The Factorial API key is JWT-formatted but is sent as x-api-key, not as a bearer token.

Credentials can be passed explicitly or read from the environment (FACTORIAL_API_KEY, FACTORIAL_TOKEN, optional FACTORIAL_BASE_URL).

import { FactorialClient } from "@factorialco/api-client";
const client = new FactorialClient({ apiKey: process.env.FACTORIAL_API_KEY });

from factorial_api_client import FactorialClient
client = FactorialClient(api_key="YOUR_KEY")   # or token="...", or from env

require "factorial_api"
api = F::Api.new(api_key: ENV["FACTORIAL_API_KEY"])   # or token:, or from env

Calling endpoints

The client is organized as client.<namespace>.<resource>.<method>. Namespaces and resources mirror the REST path /api/<version>/resources/<namespace>/<resource>.

Method naming is deterministic:

const { data } = await client.employees.employees.list();
const created = await client.apiPublic.webhookSubscriptions.create({ /* body */ });

employees = client.employees.employee.list()
sub = client.api_public.webhook_subscription.create(body={...})

Ruby follows the same shape in snake_case, with required params — path, query or form alike — as named keywords; optional query params go in a query_params: hash and bodies under their *_request keyword. (The raw low-level accessors, e.g. api.employees_employee.employees_employees_get(true, false), keep working underneath.)

employees = api.employees.employee.list(only_active: true, only_managers: false).data
team = api.teams.team.create(teams_teams_post_request: { name: "Platform" })

To discover the exact namespace/resource/method for any endpoint, consult reference/sdk-methods.md (every endpoint with its TS and Ruby calls, grouped) or the online API reference.

Pagination

List endpoints return { data: T[], meta: { end_cursor?, has_next_page, ... } }.

• list() — one raw page
• paginate() — async iterator (TS) / sync or async generator (Python)
• all() (TS) / collect_all() (Python) — fetch every page into one array/list
• Ruby: paginate (lazy Enumerator, caps via limit:/max_items:) and all on every listable resource; F::Api.paginate { |page| ... } wraps raw calls

for await (const emp of client.employees.employees.paginate()) { /* ... */ }
const everyone = await client.employees.employees.all({ maxItems: 500 });

for emp in client.employees.employee.paginate(max_items=50): ...
everyone = client.employees.employee.all()

High-volume retrieval

Pages are capped at 100 items — a server-side hard max, not a default (see the pagination docs). Passing a larger limit has no effect. Cursor pagination is sequential (page N+1 needs page N's end_cursor), so all() on a big dataset (e.g. a full company-month of attendance/worked_times) means dozens of sequential requests. To keep request counts and latency sane:

• Filter first. Use the endpoint's query params (date ranges, ids, employee_ids, …) instead of pulling everything and filtering locally.
• Sync incrementally. Where an endpoint supports updated_at-style filters, fetch only what changed since your last run and cache locally — don't re-pull the full dataset per report.
• Shard big pulls. Split one large query into filtered sub-queries (by date window or id chunks) and run those concurrently — each sub-query still paginates sequentially, but wall-clock time drops. Total request count is unchanged, so watch rate limits.
• Cap defensively. Pass max_items / maxItems so a bug or unexpected data volume can't turn into an unbounded crawl.

There is no server-side aggregation endpoint; totals (e.g. hours per employee per period) must be computed client-side from the raw records.

Errors

The client throws on any non-2xx response (bad/expired token, wrong base URL, server errors) instead of silently returning empty data. Wrap calls in try/catch (TS) or try/except (Python).

API versioning

The SDK targets a specific Factorial API date version (e.g. 2026-04-01), pinned by the SDK's major version. Newer API versions ship as new SDK majors.

Webhooks

Webhooks are HTTP POSTs Factorial sends to your target_url when an event happens.

How delivery works

• You create a webhook subscription for a subscription_type (e.g. ats/application/create), pointing at a target_url, with your company_id.
• When the event fires, Factorial sends a POST to target_url. The payload is the resource object at the top level — it is not wrapped in a { type, data } envelope. Use a distinct URL per event if you need to tell them apart easily.
• If you set a challenge when subscribing, Factorial echoes it back in the x-factorial-wh-challenge request header so you can verify the source.
• Optional author headers x-factorial-author-id / x-factorial-author-type (employee or company) identify who triggered the event, when safe to expose.
• Retry policy: up to 20 retries over 48h; after that the subscription is disabled and you are emailed. Re-enable with a PUT { enabled: true }.

Manage subscriptions via the SDK

await client.apiPublic.webhookSubscriptions.create({
  subscription_type: "ats/application/create",
  target_url: "https://example.com/webhooks/factorial",
  challenge: "a-secret-you-choose",
  company_id: 55,
});

client.api_public.webhook_subscription.create(body={
    "subscription_type": "ats/application/create",
    "target_url": "https://example.com/webhooks/factorial",
    "challenge": "a-secret-you-choose",
    "company_id": 55,
})

Type the handler payload with the exported webhook types:

import type { AtsApplicationCreateWebhook, WebhookPayloadMap, WebhookSubscriptionType }
  from "@factorialco/api-client";

// Direct alias
function onApplicationCreated(payload: AtsApplicationCreateWebhook) { /* ... */ }

// Typed dispatch keyed on the runtime subscription_type
function handle<T extends WebhookSubscriptionType>(type: T, payload: WebhookPayloadMap[T]) { /* ... */ }

from factorial_api_client import AtsApplicationCreateWebhook, WEBHOOK_PAYLOAD_TYPES

def on_application_created(payload: AtsApplicationCreateWebhook) -> None: ...

# Runtime lookup of the model class for a subscription_type
model_cls = WEBHOOK_PAYLOAD_TYPES["ats/application/create"]

The full list of events, their subscription_type, and payload fields is in reference/webhooks.md.

References

Generated, SDK-specific lookup tables (consult these for exact names/shapes):

• reference/webhooks.md — every webhook event, its subscription_type, and payload fields.
• reference/sdk-methods.md — every REST endpoint grouped by namespace/resource, with the SDK call.

For prose guides (OAuth flows, API keys, versioning, webhook policies, etc.), use the live docs — always current, not vendored here:

• Getting started: https://apidoc.factorialhr.com/docs/getting-started
• Full API reference: https://apidoc.factorialhr.com/reference