Call-up validation errors now come in the message
08/09/2026
When POST /llamamientos did not pass our validation, the response message was always the same literal —validation_errors— and the real detail lived only in errors. Anyone showing message straight to their user was showing a text that says nothing.
{
"success": false,
"message": "Hubo un error al enviar la comunicación. validation_errors",
"status": 422,
"errors": {
"employees.0.nss": [
"El campo NSS del empleado n# 1 debe ser de 12 dígitos."
]
}
}The message now carries the field errors, separated by | when there is more than one:
{
"success": false,
"message": "Hubo un error al enviar la comunicación. El campo NSS del empleado n# 1 debe ser de 12 dígitos.",
"status": 422,
"errors": {
"employees.0.nss": [
"El campo NSS del empleado n# 1 debe ser de 12 dígitos."
]
}
}errors does not change: it is still indexed by the worker's position within employees, starting at 0. Every other SEPE endpoint answers exactly as before.
A single worker's rejection follows the same rule: when SEPE does not have them in its database and data is missing to create them, data.data[].message names the missing field instead of validation_errors.
Rejections from SEPE itself have never travelled in errors: when the agency rejects one specific worker, the reason comes in data.data[].message. It is explained in Report call-ups.