"UML" matching MCP connectors:

url smoke / headless QA: desktop+phone → pass/fail JSON. MCP shelf.kymac.co

Regex matching, email/URL format validation, and JSON Schema validation.

XML well-formed check, body discarded

Check whether a URL can be opened. No browser is launched.

bulk-url-checkerA

io.github.carlosofscience

Validate up to 75,000 URLs per job (status, redirects, response times). OAuth 2.1.