CNPJAPI

CNPJ Lookup for SaaS and Onboarding

When registering a new business customer, every field the user types is friction - and a chance for error. CNPJAPI reduces onboarding to entering the CNPJ: the rest of the form fills itself in with official Receita Federal data.

The problem

  • Long registration forms hurt onboarding conversion.
  • Mistyped data pollutes the database from day one.
  • No validation of the company entered.

How the API solves it

When the CNPJ is entered, your SaaS queries the API and automatically fills in:

  • Company name and trade name
  • Full address
  • Primary activity (CNAE) and legal nature
  • Registration status, to confirm the company is active

JSON response, in seconds - the user reviews and moves on. See the guides by language to integrate with your stack.

Where to start

  1. Generate your API key at https://app.cnpjapi.com.br (see Authentication).
  2. On the onboarding CNPJ field, trigger the lookup and fill in the form with the response.
  3. Handle errors (e.g.: CNPJ not found) with a friendly message.

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