# API Ninja, free: Company discovery API

> Filtre por CNAE, Município, UF e Natureza Jurídica. Ideal para prospecção e enriquecimento de dados.

API Ninja's "Conta gratuita (bônus de R$ 10,00)" plan for the company discovery API costs $0.00 per 1,000 companies. We check each provider's docs for 13 fields. API Ninja's docs list 5: Industry, Type and status, Employees, Headquarters, Phones.
In [our company discovery API benchmark](https://datacircle.dev/best-company-discovery-api.txt), the best plan from API Ninja scores 0.0 out of 100. API Ninja ranks 77th of 105 providers.
This plan is free. We rank 1,165 plans for company discovery APIs by price. Half the plans cost $0.525 or less per 1,000 companies. [See the best free company discovery API plan.](https://datacircle.dev/best-company-discovery-api.txt)
[StackScan's $189 monthly plan](https://datacircle.dev/company-discovery-apis/stackscan/189-monthly-enterprise-post-v1-tech-lookup-lists/llms.txt) is the cheapest paid plan per 1,000 companies. StackScan's $189 monthly plan charges nothing per call. You get as many companies as StackScan's rate limit allows. [Seltz's pay-as-you-go plan](https://datacircle.dev/company-discovery-apis/seltz/pay-as-you-go-pay-as-you-go-post-v1-search-search-base/llms.txt) costs the least for 10,000 companies a month: $0.03.
[PeopleSearch.im's $5 pack](https://datacircle.dev/company-discovery-apis/peoplesearch-im/5-pack/llms.txt) covers any number of companies. PeopleSearch.im's $5 pack costs less up front than StackScan's $189 monthly plan.
[GetProspect](https://datacircle.dev/company-discovery-apis/getprospect/49-monthly/llms.txt), [Hunter](https://datacircle.dev/company-discovery-apis/hunter/49-monthly-starter-post-discover/llms.txt) and [PeopleSearch.im](https://datacircle.dev/company-discovery-apis/peoplesearch-im/5-pack/llms.txt) are the best company discovery API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/company-discovery-apis/api-ninja/free
- [Company discovery API: the best of 100+ providers compared](https://datacircle.dev/best-company-discovery-api.txt)
- Get it: https://apininja.com.br/api-cnpj?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- Request: `POST https://api.apininja.com.br/api/cnpj/busca`
- API key: with the plan, on https://apininja.com.br/api-cnpj?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- Its API docs: https://apininja.com.br/doc/openapi.html?api_id=0ca7cbb9-9e2a-4b0e-abd9-c2ccfa922904&basePath=https://api.apininja.com.br&utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- Sold by: API Ninja (https://apininja.com.br?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing)
- Checked: 2026-11-08

## In the answer

- Completeness: 38%
- Industry: ✓
- Type and status: ✓
- Employees: ✓
- Headquarters: ✓
- Phones: ✓

## Price

- $ per 1,000 companies: $0.00
- Per: page, size not stated
- Billing: free

## Aggregators

- Aggregators: none

## Charges

- Most per search: no limit
- Also pays for: from the same budget: Retorna dados de um CNPJ · Exporta CNPJs em formato CSV usando parâmetros de busca. · Busca um item na tabela NCM usando a descrição. · Retorn o último arquivo NCM gerado Siscomex em formato CSV. Com encode corrigido. · Retorn o último arquivo NCM gerado Siscomex compactado em formato JSONL. Com encode corrigido. · Extrai dados de documentos de identidade (RG e CNH).

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Filtre por CNAE, Município, UF e Natureza Jurídica. Ideal para prospecção e enriquecimento de dados.

## Data

- Freshness: 30 days
- Countries: Brazil
- Keep data: no limit
- Use data: 2.2: É proibido revender, sublicenciar, compartilhar ou redistribuir os dados obtidos de forma bruta ou massiva, caracterizando clonagem do serviço ou concorrência desleal. O uso é permitido para enriquecimento de suas próprias aplicações e serviços. 2.1: É estritamente proibido utilizar métodos automatizados (bots, crawlers, spiders ou scripts não autorizados) para extrair dados do site visualmente ou da documentação sem o uso das endpoints oficiais e devidamente autenticadas. 2.3: É estritamente proibido criar múltiplas contas por um mesmo indivíduo ou organização com o intuito de burlar o limite gratuito (Free Tier), receber bônus iniciais repetidamente ou contornar bloqueios. 8.3: O usuário assume total responsabilidade legal pelo uso que fará dos dados retornados, garantindo que possui base legal (LGPD) para processar tais informações em seus próprios sistemas ou de terceiros.

## Plan

- Pay: R$0
- You get: 10 credits
- Enough for: 500 pages

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: nothing required. Optional: page, cep, uf, cnae, codigo_situacao_cadastral, opcao_simples, opcao_mei, email
- Method: POST
- Path: /api/cnpj/busca

## About the plan

- Plan: Conta gratuita (bônus de R$ 10,00)
- Who can get it: anyone who creates an account, one account per individual or organization

## The 41 fields the plan's answer can hold

base CNPJ, CNPJ, street type, street, street number, district, postal code, state, municipality code, municipality, head office or branch, activity start date, registration status code, registration status, registration status date, registration status reason code, registration status reason, legal name, legal nature code, legal nature, responsible person qualification code, share capital, company size code, CNAE code, CNAE description, main CNAE, phone area code, phone number, partner type code, partner name, partner document, partner entry date, partner legal representative qualification, partner qualification code, partner qualification, Simples Nacional, MEI, Simples Nacional option date, Simples Nacional exclusion date, MEI option date, MEI exclusion date

## API Ninja's plans (2)

- [API Ninja, free](https://datacircle.dev/company-discovery-apis/api-ninja/free/llms.txt): $0.00 per 1,000, 38% complete, 30 days
- [API Ninja, top-up](https://datacircle.dev/company-discovery-apis/api-ninja/top-up/llms.txt): 38% complete, 30 days

## API Ninja's calls for this API (1)

- `POST /api/cnpj/busca`: [API Ninja, free](https://datacircle.dev/company-discovery-apis/api-ninja/free/llms.txt)

## API Ninja's APIs (2)

- [API Ninja: company discovery API pricing, 2 plans](https://datacircle.dev/company-discovery-apis/api-ninja/free/llms.txt)
- [API Ninja: company enrichment API pricing, 2 plans](https://datacircle.dev/company-enrichment-apis/api-ninja/free/llms.txt)

## API Ninja: company discovery API alternatives

- [AnVendor, free, POST /v1/scans](https://datacircle.dev/company-discovery-apis/anvendor/free-post-v1-scans/llms.txt): $0.00 per 1,000, 15% complete, 30 days
- [Loopster, free](https://datacircle.dev/company-discovery-apis/loopster/free/llms.txt): $0.00 per 1,000, 23% complete, 1 day
- [LeadMCP, free](https://datacircle.dev/company-discovery-apis/leadmcp/free/llms.txt): $0.00 per 1,000, 77% complete, 1 month
- [AnyAPI, free trial key, POST /v1/run/company_search.ai_ark](https://datacircle.dev/company-discovery-apis/anyapi/free-trial-key-post-v1-run-company-search-ai-ark/llms.txt): $0.00 per 1,000, 92% complete, 30 days

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-08.

- https://api.apininja.com.br/manager/api/id/0ca7cbb9-9e2a-4b0e-abd9-c2ccfa922904?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://api.apininja.com.br/manager/spec/0ca7cbb9-9e2a-4b0e-abd9-c2ccfa922904?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://apininja.com.br?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://apininja.com.br/api-cnpj?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://apininja.com.br/api-ncm?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://apininja.com.br/api-recog?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing
- https://apininja.com.br/termos-de-servico?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-discovery-api-pricing