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Mexican RFC Structural Validator with EFOS Blacklist Check
x402
Mexican RFC Structural Validator with EFOS Blacklist Check is a paid API for AI agents from x402-api-24223879872.us-east1.run.app, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-11).
Validates the structure of a Mexican RFC (tax ID) — checking persona física/moral format, embedded date, SAT check digit — and queries the Article 69-B EFOS blacklist status.
Price / call$0.03
Success—
StatusUnknown
How this service works
Structural validation of a Mexican RFC (sent as a JSON body, not a query param): persona física/moral, embedded date, SAT check digit, plus Article 69-B (EFOS) blacklist status.
Output
Returns a structured JSON response indicating: whether the RFC is structurally valid, whether it belongs to a persona física or moral, the validity of the embedded date, whether the SAT check digit is correct, and whether the RFC appears on the Article 69-B EFOS blacklist of tax offenders.
Example use cases
Supplier onboarding RFC verification
“Before we add this supplier to our system, can you validate their Mexican RFC 'GOME850101HDF' — confirm the structure is correct, the check digit matches, and they're not on the SAT EFOS blacklist?”
Invoice pre-validation compliance check
“We're about to issue a CFDI invoice to a client with RFC 'AAA010101AAA' — please check if that RFC is valid and not flagged under Article 69-B before we proceed.”
KYC screening for Mexican business entity
“I need to verify the RFC 'XIA190128J61' for a Mexican company we're onboarding — is it a valid persona moral RFC with the right SAT check digit, and is it free of EFOS blacklist issues?”
Technical details
Endpoint
POSThttps://x402-api-24223879872.us-east1.run.app/v1/mx/rfc?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to validate a Mexican RFC's structural correctness AND cross-check it against the SAT EFOS Article 69-B blacklist in a single call. It is specifically suited for Mexican tax compliance workflows, supplier onboarding, CFDI invoice preparation, or KYC checks involving Mexican entities. Prefer this over generic string validators because it understands the persona física/moral distinction, embedded date, and SAT check digit algorithm, and it performs a live or cached EFOS lookup.
Side effects
- Malformed RFC string returns validation error with structural breakdown
- RFC not found in SAT/EFOS database may return unknown blacklist status
- Network timeout or SAT service unavailability may cause delayed or failed EFOS lookup
- Input missing 'rfc' field returns 400 bad request
- Extremely new or recently issued RFCs may not yet appear in EFOS dataset
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| rfc | string | RFC to validate, e.g. EKU9003173C9 |
Tags
x402
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