Introduction

CorpNet provides REST APIs that let partners embed business formation, employer tax registration, and ongoing compliance management directly into their own applications — under their own brand, in all 50 states. Three product lines are available, and you can license one or any combination depending on your partner agreement.

Available APIs

Business Formation API

Form LLCs, corporations, and other entity types in any state. Covers order creation, status polling, document retrieval, and request-for-information (RFI) handling through a single API surface.

Employer Tax Registration API

Register employers for state and federal tax accounts (unemployment insurance, withholding, and equivalents) across all 50 U.S. states. Common use case for payroll-service providers: collect a single payload from your customer and register them everywhere they need to be.

Compliance API

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Limited Availability — endpoints, request/response shapes, and field names may change before general availability. Contact your CorpNet account manager to confirm entitlement.

Manage ongoing compliance for entities already in CorpNet's system — surface upcoming compliance alerts (Annual Report, Registered Agent renewal, BOI), submit completed compliance form data on behalf of customers, and manage Registered Agent and other recurring subscriptions across all 50 states.

Getting Started

1. Request your credentials. Contact your CorpNet account manager. They will issue you an API key scoped to the products you have licensed. See API Key for guidance on storing and rotating it.
2. Set up authentication. Every request carries a Bearer token in the Authorization header. The same token authenticates against all three APIs; entitlement per product follows your partner agreement. See Authorization for the request format, host list, and error semantics.
3. Make your first call. Open the reference for the API you want to use:
   • Business Formation API Reference
   • Employer Tax Registration API Reference
   • Compliance API Reference

What's in each API reference

• Endpoint definitions with parameters, required fields, and conditional rules
• Sample requests and responses with status codes
• Order creation and order-status retrieval flows
• Document and RFI handling (Business Formation only)