Verdict. Po6 Mailbox MCP server was the more reliable of the two over the last 30 days: 100% uptime against 99.81% (0.19 points). Po6 Mailbox MCP server answers faster (398 vs 1092 ms median). Both are graded on the same Glimind checks.
Data as of .
| Metric | Po6 Mailbox MCP server | Clearbounce Email Verification MCP server |
|---|---|---|
| Uptime, 30 days | 100% | 99.81% |
| Median handshake latency | 398 ms | 1092 ms |
| p95 handshake latency | 651 ms | 3282 ms |
| Checks in 30 days | 211 | 4,935 |
| Outages, 90 days | 0 | 3 |
| Median recovery | — | 7 min |
| Agent-readiness score | 96/100 (A) | 100/100 (A) |
| Tools | 39 | 6 |
| Tool-list size for an agent | ~5,883 tokens | ~1,010 tokens |
| Days observed | 28 | 29 |
Po6 Mailbox MCP server was the more reliable of the two over the last 30 days: 100% uptime against 99.81% (0.19 points). Po6 Mailbox MCP server answers faster (398 vs 1092 ms median). Both are graded on the same Glimind checks.
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 clearbounce-email-verification-mcp-serve https://clearbounce.net/mcp
Claude Desktop · Windsurf · Cline (mcpServers JSON)
{
"mcpServers": {
"clearbounce-email-verification-mcp-serve": {
"type": "http",
"url": "https://clearbounce.net/mcp"
}
}
}
Third-party servers, listed as discovered. Glimind is not affiliated with either. Figures are automated measurements from one region and may lag.