3LT Letter Mail
Give AI assistants hands: send real USPS letters via MCP.
endpoint: https://3lgrouptechnology.com/mcp
registry: com.3lgrouptechnology/3lt-letter-mail
A
recent success 100% (30 probes) ·
MCP handshake OK
· protocol 2025-06-18
TLS valid (80d left) · latency 214.0 ms ·
HTTP 406 · auth open ·
tools 3
manifest a2648479a2175db0
· drift events seen here: 0
Embed this grade
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Recent probes
| time (UTC) | ok | grade | mcp | latency | tls | tools | hash |
|---|---|---|---|---|---|---|---|
| 2026-10-12T06:29:52Z | ✓ | A | ✓ | 214.0 ms | 80d | 3 | a2648479a2175db0 |
| 2026-10-12T00:29:28Z | ✓ | A | ✓ | 207.0 ms | 80d | 3 | a2648479a2175db0 |
| 2026-10-11T18:29:03Z | ✓ | A | ✓ | 197.0 ms | 81d | 3 | a2648479a2175db0 |
| 2026-10-11T12:28:43Z | ✓ | A | ✓ | 187.0 ms | 81d | 3 | a2648479a2175db0 |
| 2026-10-11T06:28:06Z | ✓ | A | ✓ | 218.0 ms | 81d | 3 | a2648479a2175db0 |
| 2026-10-11T00:26:25Z | ✓ | A | ✓ | 279.0 ms | 81d | 3 | a2648479a2175db0 |
| 2026-10-10T18:24:59Z | ✓ | A | ✓ | 155.0 ms | 82d | 3 | a2648479a2175db0 |
| 2026-10-10T12:23:38Z | ✓ | A | ✓ | 240.0 ms | 82d | 3 | a2648479a2175db0 |
| 2026-10-10T06:21:43Z | ✓ | A | ✓ | 172.0 ms | 82d | 3 | a2648479a2175db0 |
| 2026-10-10T00:21:23Z | ✓ | A | ✓ | 243.0 ms | 82d | 3 | a2648479a2175db0 |
| 2026-10-09T18:21:18Z | ✓ | A | ✓ | 219.0 ms | 83d | 3 | a2648479a2175db0 |
| 2026-10-09T12:20:41Z | ✓ | A | ✓ | 201.0 ms | 83d | 3 | a2648479a2175db0 |
| 2026-10-09T06:20:32Z | ✓ | A | ✓ | 337.0 ms | 83d | 3 | a2648479a2175db0 |
| 2026-10-09T00:20:24Z | ✓ | A | ✓ | 200.0 ms | 83d | 3 | a2648479a2175db0 |
| 2026-10-08T18:19:30Z | ✓ | A | ✓ | 154.0 ms | 84d | 3 | a2648479a2175db0 |
| 2026-10-08T12:18:35Z | ✓ | A | ✓ | 192.0 ms | 84d | 3 | a2648479a2175db0 |
| 2026-10-08T06:17:49Z | ✓ | A | ✓ | 203.0 ms | 84d | 3 | a2648479a2175db0 |
| 2026-10-08T00:17:19Z | ✓ | A | ✓ | 192.0 ms | 84d | 3 | a2648479a2175db0 |
| 2026-10-07T18:16:41Z | ✓ | A | ✓ | 228.0 ms | 85d | 3 | a2648479a2175db0 |
| 2026-10-07T12:15:19Z | ✓ | A | ✓ | 170.0 ms | 85d | 3 | a2648479a2175db0 |
| 2026-10-07T06:14:43Z | ✓ | A | ✓ | 230.0 ms | 85d | 3 | a2648479a2175db0 |
| 2026-10-07T00:14:04Z | ✓ | A | ✓ | 166.0 ms | 85d | 3 | a2648479a2175db0 |
| 2026-10-06T18:13:13Z | ✓ | A | ✓ | 221.0 ms | 86d | 3 | a2648479a2175db0 |
| 2026-10-06T12:12:35Z | ✓ | A | ✓ | 265.0 ms | 86d | 3 | a2648479a2175db0 |
| 2026-10-06T06:11:17Z | ✓ | A | ✓ | 207.0 ms | 86d | 3 | a2648479a2175db0 |
| 2026-10-06T00:10:35Z | ✓ | A | ✓ | 320.0 ms | 86d | 3 | a2648479a2175db0 |
| 2026-10-05T18:10:01Z | ✓ | A | ✓ | 151.0 ms | 87d | 3 | a2648479a2175db0 |
| 2026-10-05T12:09:01Z | ✓ | A | ✓ | 261.0 ms | 87d | 3 | a2648479a2175db0 |
| 2026-10-05T06:08:24Z | ✓ | A | ✓ | 216.0 ms | 87d | 3 | a2648479a2175db0 |
| 2026-10-05T00:07:38Z | ✓ | A | ✓ | 218.0 ms | 87d | 3 | a2648479a2175db0 |