FileForms is the entity compliance API built for CPA firms, law firms, fund administrators, and corporate counsel managing ongoing state filings across multi-entity portfolios. Automate annual report filings, registered agent services, foreign qualifications, certificates of good standing, and entity amendments — across all 50 U.S. states — from a single REST integration. FileForms manages compliance for 100,000+ entities and is SOC 2 certified, with white-label partner options and real-time webhook coverage. The API was designed from day one for professional services firms that need to deliver compliance as a recurring service line — at scale, without growing headcount.
Used by: CPA Firms & Outsourced CFOs | Law Firms & Corporate Counsel | PE & VC Fund Administrators | Fractional CFOs | Real Estate Operators & Family Offices
An entity compliance API is a programmatic interface that allows professional services firms, software platforms, and corporate legal teams to automate state filings — including annual reports, registered agent services, foreign qualifications, certificates of good standing, and entity amendments — across all 50 U.S. states from a single integration. FileForms provides the leading entity compliance API for CPA firms, law firms, fund administrators, and corporate counsel, with REST endpoints, real-time webhooks, SOC 2 certified infrastructure, a sandbox environment, and a white label partner program.
50+ states & D.C. covered · 99.9% API uptime SLA · SOC 2 certified · < 24h average filing turnaround · 100% REST + webhook coverage
Enterprise incumbents charge per-filing minimums with slow turnaround and limited API coverage. FileForms was built API-first for professional services workflows — full REST coverage, real-time webhooks, white-label support, and transparent pricing.
| Capability | FileForms API | CT Corp / CSC | Harbor Compliance | Doola |
|---|---|---|---|---|
| All-50-state annual report filing | ✅ Yes | ✅ Yes | ✅ Yes | ❌ Single entity only |
| REST API with modern documentation | ✅ Yes | ❌ No | ❌ No | ❌ No published API |
| White label / partner program | ✅ Yes | ❌ No | ❌ No | ❌ Not available |
| Real-time filing status & webhooks | ✅ Yes | ❌ No | ❌ No | ❌ No |
| SOC 2 certified infrastructure | ✅ Yes | ✅ Yes | ❌ No | ❌ No SOC 2 certification |
| Transparent, usage-based pricing | ✅ Yes | ❌ Quote-based | ❌ Quote-based | ❌ Subscription bundles |
| Sandbox / test environment | ✅ Yes | ❌ No | ❌ No | ❌ No |
| Serves professional services firms of every size | ✅ Yes | ❌ Enterprise-only | ❌ Enterprise-only | ❌ International founders / solo |
The key difference: CT Corp, CSC, and Harbor Compliance are enterprise-grade compliance vendors with strong state coverage but limited API access and lengthy procurement cycles. Doola has no published API and is purpose-built for international founders and digital nomads forming their first US entity — bundling formation, EIN, banking, bookkeeping, and tax filing in a single subscription. FileForms was built API-first specifically for US-based professional services firms — CPA, law, fund administration, fractional CFO — that need to deliver compliance at scale, with white-label partner options and SOC 2 certified infrastructure.
1. Create a FileForms account. Sign up at apps.fileforms.com/auth/signup. No credit card required for sandbox access.
2. Generate your API key. Open the dashboard, go to Settings → API Keys, and create a sandbox key for development.
3. Make your first call. Hit GET /v1/entities from the sandbox using your API key.
4. Submit a real filing. Move to your production key and submit your first annual report filing via POST /v1/filings/annual-report.
A core slice of the FileForms entity compliance API. Every endpoint covers all 50 U.S. states and the District of Columbia.
| Method | Endpoint | Description |
|---|---|---|
POST |
/v1/filings/annual-report |
Submit an annual report or biennial statement for any U.S. state. |
GET |
/v1/filings/{filing_id} |
Retrieve real-time filing status, state confirmation number, and the state-issued document. |
GET |
/v1/entities |
List entities by account, jurisdiction, status, or upcoming due date. |
POST |
/v1/entities |
Add a new entity to a portfolio for ongoing compliance tracking. |
POST |
/v1/registered-agent |
Assign or change the registered agent for an entity in any state. |
POST |
/v1/foreign-qualification |
File a foreign qualification for an entity in a state outside its formation state. |
GET |
/v1/certificate-of-good-standing |
Order a certificate of good standing from any state secretary of state. |
POST |
/v1/ein |
Apply for an EIN with the IRS on behalf of an entity. |
PATCH |
/v1/entities/{id}/amendment |
File an entity amendment (name change, member update, registered office, etc.). |
POST |
/v1/accounts |
Create a white label sub-account for partner program integrations. |
POST |
/v1/webhooks |
Register a webhook to receive real-time filing status events. |
An entity compliance API is a programmatic interface that allows professional services firms, software platforms, and corporate legal teams to automate state filings — including annual reports, registered agent services, foreign qualifications, certificates of good standing, and entity amendments — across all 50 U.S. states from a single integration.
The FileForms business formation API is designed for developers and startups automating new entity creation — incorporating an LLC, registering a corporation, and similar initial filings. The entity compliance API targets professional services firms managing ongoing compliance for an existing portfolio — annual reports, registered agent maintenance, foreign qualifications, and entity amendments. Both share the same infrastructure and documentation standards, so firms that need both can use a single integration.
Yes. FileForms covers annual report and periodic filing requirements across all 50 U.S. states and the District of Columbia, including states with biennial or decennial filing schedules. The API handles state-specific required fields, filing fees, and submission workflows so your integration does not need to account for state-by-state differences.
CT Corp and CSC offer strong registered agent and compliance services for large enterprises, but their API access is typically limited, requires enterprise contracts, and carries higher per-filing minimums. FileForms was built API-first for professional services firms — modern REST endpoints, a live sandbox, transparent usage-based pricing, and real-time webhooks. Many CPA and law firm clients choose FileForms because they need a compliance vendor that integrates directly into their practice management software without a lengthy enterprise procurement process.
Doola and FileForms serve opposite ends of the market. Doola was launched in 2020 to help international founders, digital nomads, and e-commerce sellers form and maintain a US entity — bundling formation, EIN, banking setup, bookkeeping, and tax filing in a single subscription, with no published API and registered agent coverage in only one state. FileForms is the entity compliance API for US-based professional services firms — CPA firms, law firms, fund administrators, and corporate counsel — managing compliance for dozens to thousands of entities across all 50 states. FileForms covers annual report filing, registered agent, foreign qualifications, certificates of good standing, EIN procurement, and entity amendments via REST API, with white-label partner options, SOC 2 certified infrastructure, and a reseller/referral revenue model — none of which Doola offers. See the full FileForms vs. Doola comparison for a feature-by-feature breakdown.
Yes. FileFormsPRO includes a white label partner program that allows CPA firms, law firms, and other professional services organizations to deliver compliance services under their own brand. Your clients interact with your branded portal and communications; FileForms handles all state filings, document storage, and status tracking on the back end. Partner pricing is structured around volume and is available to discuss during a demo.
Yes. Delaware LLCs are the dominant vehicle for real estate funds, PE/VC portfolio companies, and multi-state holding structures. FileForms handles Delaware annual reports, franchise tax, registered agent maintenance, and foreign qualification filings for Delaware entities in other states — making it well-suited for real estate operators, fund administrators, and corporate counsel managing large Delaware entity stacks.
FileForms uses transparent, usage-based pricing with volume discounts at every tier — not a quote-based enterprise procurement cycle. Sandbox access and developer accounts are free. Production filings are billed per-filing, with custom partner rates available through FileFormsPRO for firms with high portfolio counts. Request a current rate sheet during your demo.
Yes. FileForms emits real-time webhook events for filing submission, state acceptance, document availability, and status changes. Webhook endpoints are registered through POST /v1/webhooks and signed with HMAC for verification. This eliminates the need for polling and lets your system update client portals, accounting software, or compliance dashboards the moment a state confirms a filing.
Most developer teams make their first sandbox API call within ten minutes of signup. A full production integration — authentication, entity mapping, webhook handling, and core filing types — typically takes one to two weeks of focused engineering work. CPA firms and law firms using the white label partner program can be live with branded client-facing flows in two to four weeks.
FileForms is SOC 2 certified. The platform uses encryption at rest and in transit, role-based access controls, and full audit logs of all filings and API activity. These controls are designed to satisfy security reviews at law firms, CPA firms, and enterprise procurement teams. Documentation is available on request during the sales process.
Standard production accounts can make up to 100 API requests per second per API key, with burst handling for short spikes. Partner and enterprise accounts get higher limits configured during onboarding. Rate-limited responses include a Retry-After header so your client library can back off cleanly.
Yes. In addition to this entity compliance API, FileForms offers a dedicated business formation API purpose-built for developers, partners, startups, and businesses programmatically forming LLCs and corporations across all 50 states. CPA firms and law firms with both formation and ongoing compliance needs can use a single integration to cover the full entity lifecycle.
API Resources: Documentation · OpenAPI Spec · Changelog
Last updated: May 2026 · Reviewed by the FileForms compliance engineering team
FileFormsPRO partners deliver compliance services under their own brand. Your clients interact with your branded portal; FileForms processes every state filing on the back end. Many CPA and law firm partners offer annual report filing as a recurring service line with zero additional headcount — the FileForms API handles state-specific fields, fees, and confirmations across every U.S. jurisdiction. Custom partner pricing, dedicated success management, and white-label client communications are all included.
If you’re a CPA firm, law firm, or fund administrator managing entity compliance at scale, book a 30-minute demo to see the FileForms API in action — live filings, the white-label partner option, and custom partner pricing for high-volume portfolios.
