Data quality: filter invalid MCP endpoint URLs

[a6b8]

Summary

AgentProbe found several invalid MCP endpoint URLs in ERC-8004 agent registrations that should be filtered during import.

Examples of invalid URLs

• http://localhost:3000/create — localhost URLs
• http://test.mcp — domains without valid TLD
• http://100.103.140.84:8090/mcp — raw IP addresses
• http:// (not HTTPS) URLs — no SSL in 2026

Recommendation

Add URL validation during registry parsing:

1. Reject localhost, 127.0.0.1, 0.0.0.0 and private IPs
2. Reject http:// (non-HTTPS) endpoints
3. Reject URLs without valid TLD (e.g. test.mcp)
4. Warn on social media URLs used as MCP endpoints

Context

AgentProbe now filters these on import, but cleaner source data would benefit all consumers of the registry.