# SPEI

> Source: https://docs.barcoder.ai/docs/payments/MX/spei
> extracted at 2026-10-03
> Publisher: Barcoder — encyclopedia of QR, barcode and payment-code standards

**Country:** Mexico (`MX`)
**Adoption:** 5.34B txns
**Primary use:** Transfers

## Technical standard

See [spei](https://docs.barcoder.ai/docs/standards/spei) for the underlying barcode/QR specification.

## Source

Extracted from [MX-mexico.md](https://docs.barcoder.ai/docs/payments/MX) — see that report for full banking landscape, technical specifications, and citations.