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Authentication method

The Fiet Business API uses HTTP Basic Authentication (MVP). Credentials are issued per organisation and environment. Include an Authorization header on every request:
  • Authorization: Basic <base64(username:password)>

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Environments

EnvironmentBase URL
Production (example)https://api.fiet.finance
SandboxComing soon

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Example request

curl -sS \
  -H "Authorization: Basic <base64(username:password)>" \
  "https://api.fiet.finance/health"

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Error responses

Common responses you should handle:
  • 401 Unauthorized: missing or invalid credentials
  • 403 Forbidden: credentials are valid, but access is not permitted
  • 400 Bad Request: invalid parameters or request body (see Problem schema)
Where applicable, error responses follow an RFC 7807-style shape: 
{
  "type": "string",
  "title": "string",
  "status": 400,
  "detail": "string"
}