Social Security
Get NSS
Credits: 1 per call.
Retrieves a worker’s NSS (Número de Seguridad Social) from IMSS based on CURP. Returns the 11-digit NSS.
Use this endpoint when onboarding employees for payroll or social-security registration: a CURP is far easier to collect than asking the candidate for their NSS card, which is frequently misplaced.
First-time CURPs: for a CURP queried for the first time, use Get NSS (Async) — the synchronous lookup can answer SERVICE_UNAVAILABLE for it.
cURL
Response
Business Responses (Strict Envelope Pattern).