Verdict. Po6 Mailbox MCP server and Qualisend Email Verification MCP server had the same 30-day uptime in Glimind's checks (100%). Po6 Mailbox MCP server answers faster (399 vs 597 ms median). Compare readiness below.
Data as of .
| Metric | Po6 Mailbox MCP server | Qualisend Email Verification MCP server |
|---|---|---|
| Uptime, 30 days | 100% | 100% |
| Median handshake latency | 399 ms | 597 ms |
| p95 handshake latency | 628 ms | 2698 ms |
| Checks in 30 days | 219 | 4,969 |
| Outages, 90 days | 0 | 0 |
| Median recovery | — | — |
| Agent-readiness score | 96/100 (A) | 96/100 (A) |
| Tools | 39 | 12 |
| Tool-list size for an agent | ~5,883 tokens | ~1,951 tokens |
| Days observed | 28 | 29 |
Po6 Mailbox MCP server and Qualisend Email Verification MCP server had the same 30-day uptime in Glimind's checks (100%). Po6 Mailbox MCP server answers faster (399 vs 597 ms median). Compare readiness below.
Claude Code
claude mcp add --transport http po6-mailbox-mcp-server https://mcp.po6.com
Claude Desktop · Windsurf · Cline (mcpServers JSON)
{
"mcpServers": {
"po6-mailbox-mcp-server": {
"type": "http",
"url": "https://mcp.po6.com"
}
}
}
Claude Code
claude mcp add --transport http qualisend-email-verification-mcp-server https://app.qualisend.com/api/mcp
Claude Desktop · Windsurf · Cline (mcpServers JSON)
{
"mcpServers": {
"qualisend-email-verification-mcp-server": {
"type": "http",
"url": "https://app.qualisend.com/api/mcp"
}
}
}
Third-party servers, listed as discovered. Glimind is not affiliated with either. Figures are automated measurements from one region and may lag.