Connect FIEL credentials from a PFX file
POST
https://api.gigstack.io/v2/invoices/download/pfx
PKCS#12 / PFX bundle and its password.
⚠️ Sensitive credentials
pfxandpfx_passwordare live security credentials — the PFX embeds the FIEL
private key, and the password unlocks it. Together they can impersonate the taxpayer
before the SAT.Send them only over TLS, only to this endpoint. Never log them, never put them in a URL, never commit them, never paste them into a
shared document or ticket.The example values below are placeholders, not usable credentials. Do not treat
any example in this document as a real secret to copy.The server encrypts both values at rest and never returns them in any response.
password, must not be expired, and its RFC must match the team's configured RFC. Each
RFC needs its own team.
Request
Body Params application/jsonRequired
Responses
Request Request Example
Shell
JavaScript
Java
Swift
curl --location 'https://api.gigstack.io/v2/invoices/download/pfx' \
--header 'Content-Type: application/json' \
--data '{
"pfx": "<BASE64_PFX_PLACEHOLDER>",
"pfx_password": "<PFX_PASSWORD_PLACEHOLDER>"
}'Response Response Example
200 - Success Example
{
"success": true,
"message": "FIEL credentials connected successfully",
"data": {
"rfc": "MEE200101ABC",
"expires_at": 1893456000000,
"expires_at_readable": "31/12/2029",
"serial_number": "00001000000512345678",
"sync_start_date": "2023-08-05",
"registered": true,
"registered_at": 1767225600000
}
}Modified at 2026-08-05 21:48:25