Reverse lookup
Reverse lookup: find every Brazilian company where a given person or entity appears as partner/shareholder, by name (full-text, accent-insensitive). Returns partner name, company CNPJ and legal name, role and entry date. The highest-value query for due diligence — data straight from the official Receita Federal CNPJ registry (personal tax IDs come pre-masked from the source). Free sample, no payment: https://api.brazilayer.com/v1/cnpj/amostra
Answeringour last check, 2026-09-24
1 of 1checks answered this week
989 msmedian answer time
$0.02listed price per call
$0.02price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://api.brazilayer.com/v1/cnpj/socio/busca
| Category | Company and compliance |
|---|---|
| Provider host | api.brazilayer.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 3 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.02 | 989 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"nome": "fulano de tal",
"por_pagina": 20
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"nome": {
"description": "person or entity name, min 3 chars",
"type": "string"
},
"pagina": {
"type": "integer"
},
"por_pagina": {
"type": "integer"
}
},
"required": [
"nome"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}