"Understanding Abstract Syntax Trees (AST)" matching MCP connectors:

Abstract Phone MCP — wraps Abstract API Phone Validation

Fast email validation at the edge: syntax, MX records, disposable-domain detection.

Verify email addresses in bulk: syntax, domain, MX, disposable and role addresses, SPF and DMARC

Detects catastrophic-backtracking (ReDoS) regex risk via AST parsing, with JS-safe rewrites.