NSS validation API — verify Mexican social security numbers
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Most NSS validation API providers handle both format check and IMSS lookup. The existence check returns minimal data by default — name matching requires an additional field in the request, and not all providers support it.
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What's the difference between NSS format validation and NSS validation via IMSS? I can validate the NSS format locally (11 digits, Luhn algorithm), but I also need to confirm the NSS exists in IMSS records and belongs to the person I think it does.
Is there an NSS validation API that does both format and IMSS existence check? And does it also return the associated worker's name so I can cross-check?