https://www.tlaloc.sh/en/blog/ Guides and tutorials for the Tlaloc APIs: CURP, RFC, CEP, postal codes and MCP. en-us https://www.tlaloc.sh/en/blog/validate-rfc-without-tax-status-certificate.html https://www.tlaloc.sh/en/blog/validate-rfc-without-tax-status-certificate.html Thu, 04 Jun 2026 12:00:00 +0000 Mexico's SAT made it official: businesses can no longer require the Constancia de Situación Fiscal (tax status certificate) to issue an invoice, and there are fines for those who do. Stop asking for the CSF and validate the RFC in real time against the SAT registry before you issue your CFDI. https://www.tlaloc.sh/en/blog/validate-curps-batch.html https://www.tlaloc.sh/en/blog/validate-curps-batch.html Wed, 03 Jun 2026 12:00:00 +0000 Validate many CURPs at once with Tlaloc's batch endpoint. Send your full list in a single request and skip the orchestration code. https://www.tlaloc.sh/en/blog/validate-payment-receipts-ai.html https://www.tlaloc.sh/en/blog/validate-payment-receipts-ai.html Tue, 07 Apr 2026 12:00:00 +0000 Learn how to validate SPEI payment receipts using AI. Send an image to your AI assistant and verify the payment against Banxico in seconds. https://www.tlaloc.sh/en/blog/validate-spei-payments-cep.html https://www.tlaloc.sh/en/blog/validate-spei-payments-cep.html Tue, 07 Apr 2026 12:00:00 +0000 Learn how to verify SPEI bank transfers against official Banco de Mexico records using the Comprobante Electronico de Pago (CEP) and the Tlaloc API. https://www.tlaloc.sh/en/blog/mexico-api-mcp.html https://www.tlaloc.sh/en/blog/mexico-api-mcp.html Tue, 07 Apr 2026 12:00:00 +0000 Step-by-step guide to set up the Tlaloc MCP server in ChatGPT, Claude, and other AI assistants. Access CURP, RFC, CEP, and more official Mexican data.