Contasimples · Authentication Profile

Contasimples Authentication

Authentication

OAuth 2.0 Client Credentials flow

Contasimples declares 1 security scheme(s) across its OpenAPI definitions.

Company
Methods: Schemes: 1 OAuth flows: API key in:

Security Schemes

OAuth 2.0 Client Credentials oauth2
· flows:

Source

Authentication Profile

Raw ↑ 
generated: '2026-10-10'
method: searched
generator: extract-docs-artifacts.py (local)
source: https://developers.contasimples.com/br/api-reference/post-oauth-v1-access-token
sources:
- https://developers.contasimples.com/br/api-reference/post-oauth-v1-access-token
- https://developers.contasimples.com/en/api-reference/post-oauth-v1-access-token
- https://developers.contasimples.com/br/comece-aqui/quickstart
- https://developers.contasimples.com/en/comece-aqui/quickstart
description: OAuth 2.0 Client Credentials flow
schemes:
- type: oauth2
  name: OAuth 2.0 Client Credentials
  evidence: 'Obtém um token de acesso (JWT) via OAuth 2.0 Client Credentials. As credenciais api_key e api_secret devem ser enviadas no header
    Authorization: Basic , com o valor em base64 da string api_key:api_secret .'
  location: header
  header: Authorization
  flows:
  - client_credentials
  token_url: https://api-sandbox.contasimples.com/oauth/v1/access-token
  how_to_obtain: 'Credenciais são gerenciadas no Internet Banking da Conta Simples; forneça api_key e api_secret codificados em base64 no cabeçalho
    Authorization: Basic.'
docs: https://developers.contasimples.com/br/api-reference/post-oauth-v1-access-token

Work with this as data

Every security artifact here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for security posture

4 MCP tools reach this
  • find_securityBrowse and filter every security artifact in the catalog.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This security artifact 
curl "https://apis.io/api/v1/security/contasimples-authentication"
All security posture 
curl "https://apis.io/api/v1/security?limit=25"

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.