Form businesses programmatically
The same engine we use for the dashboard, exposed as a REST API. Form entities, request EINs, track compliance, sync documents to your own product. Stable v1 with OAuth, webhooks, and SDKs in Python, Node, Ruby, Go, PHP.
Quickstart
$ pip install filebusiness
# Form an LLC
from filebusiness import Client
client = Client(api_key="fb_live_...")
formation = client.formations.create(
entity_type="llc",
state="DE",
name="Acme Holdings LLC",
members=[{"name": "Jane Smith", "role": "managing_member"}],
)
>>> formation.status
"submitted"
>>> formation.estimated_completion
"2026-06-05T14:00:00Z"
Resources
Create LLCs, C-Corps, S-Corps, nonprofits across 51 states.
POST /v1/formationsSubmit Form SS-4 to the IRS. Instant for US founders, 4 days international.
POST /v1/ein-requestsTrack and auto-file annual reports, BOI updates, state changes.
GET /v1/compliance/deadlinesRetrieve filed Articles, OAs, EIN letters, and state correspondence.
GET /v1/documents/{id}Subscribe to formation status changes, document delivery, compliance alerts.
POST /v1/webhooksBuild apps users can authorize to act on their File.Business account.
GET /oauth/authorizeSDKs and tools
pip install filebusinessnpm install filebusinessgem install filebusinessgo get filebusinesscomposer require filebusinessRun in Postman →Who uses the API
Accounting firms onboarding entire client books. Venture studios that form 30+ companies a year. Lawyers automating routine filings. ISVs embedding entity formation in their products.
Venture studios
Programmatic incorporation for portfolio companies. Single source of truth across 30+ entities.
Accounting platforms
Embedded entity formation inside their existing client onboarding flow.
Law firms
Automated annual report filings across entire client portfolios.
Every filing, traceable from submission to state seal
The same status view your customers see in the dashboard. Five stages, color-coded, with timestamps. No "we'll let you know" black box.
Your filing is in progress
State of Delaware Division of Corporations · Expected acceptance: same business day
The numbers behind a business operating system you can trust
Audited, accredited, encrypted, insured. The complete picture of what makes File.Business safe to run your business on.
Independent annual audit. Report available under NDA for enterprise customers.
Better Business Bureau accredited business with public dispute resolution policy.
Across all 50 states + DC. Single-member LLCs to multi-entity holding structures.
Customer rating from verified-formation customers, audited annually.
Professional liability coverage. Penalty-free guarantee covers state late fees from our error.
All 50 states plus DC. Filing direct with each Secretary of State; no middleman.
Countries. Foreign founders without SSN supported via IRS fax-EIN channel.
On the $129/yr Compliance Annual Filings plan, we cover state late fees.
When you autofile your annual report through the $129/yr plan and we miss the deadline, we pay the state's late fee. The guarantee applies to that specific plan and the filings it includes. Other File.Business services are billed at the prices on this page.