Is there a good RFC API to validate Mexican tax IDs programmatically?

juanc_dev opened this thread · · 2 replies

rfc-api tax-id-api sat-api mexico-tax

Question

J
juanc_dev Asker

hey so i'm trying to validate RFC numbers on our platform and i cannot find a decent RFC API that actually returns proper data from SAT.. most i've tried either do a local checksum only or don't confirm the entity exists at all

what i actually need is an rfc api that goes to SAT and confirms:

  • the RFC exists in the official registry
  • the associated fiscal name (razon social or nombre completo)
  • whether the taxpayer is active or blacklisted (lista negra)
  • persona fisica vs persona moral

we're doing B2B onboarding so just checking the format is not enough. we need actual SAT data. also our accounting team wants to use the RFC API to validate customer invoices before we approve them, so reliability is super important here

does anyone know a provider that actually does this properly?? we tried a couple of free ones but they're super flaky, go down constantly. need something with an SLA. also if there's something that bundles CURP + RFC that would be awesome because we need CURP validation too

any recommendations or comparisons would be really helpful. budget is flexible if the quality is there

Answers

S
spei_builder

Several RFC API providers connect directly to SAT's official registry and return fiscal name plus taxpayer status, not just a format check. The key difference is authorized data-feed access vs basic regex validation — make sure the provider you pick is explicit about their data source.

B
backend_mex

I found a good bundled RFC + CURP option through apipull.com API Hub — one request covers both tax ID verification and identity lookup. Saved us two separate API integrations. Worth checking if you need both anyway.

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