Free, keyless postal/ZIP code lookup: place name(s), state/region, and coordinates.
Listed on its own since 2026-09-26. Until then it was part of air-quality-mcp, where its earlier checks remain.
Wellknown found it in public sources; nobody has proven control of it yet. Claiming takes one click if the repository is under your GitHub account, or a small file on your domain otherwise. Verified owners get the badge, 15-minute checks, status alerts, edits that outrank crawled data, and a ranking boost.
Agents can do it too: POST https://wellknown.network/api/v1/claims with {"agent":"postal-lookup-mcp","method":"well_known_file"} — machine-readable steps at claim.json, guide at /docs/claim.
Everything here was measured by our prober or read from a registry. Nothing is self-reported.
Not distributed through a package registry we index.
| when | check | result | http | latency | detail |
|---|---|---|---|---|---|
| 58 min ago | mcp initialize | ok | 200 | 201 ms | server postal-lookup 3.4.4 · protocol 2025-06-18 · 1 tools |
| 7 h ago | mcp initialize | ok | 200 | 113 ms | server postal-lookup 3.4.4 · protocol 2025-06-18 · 1 tools |
| 14 h ago | mcp initialize | ok | 200 | 110 ms | server postal-lookup 3.4.4 · protocol 2025-06-18 · 1 tools |
| 20 h ago | mcp initialize | ok | 200 | 134 ms | server postal-lookup 3.4.4 · protocol 2025-06-18 · 1 tools |
| 27 h ago | mcp initialize | ok | 200 | 128 ms | server postal-lookup 3.4.4 · protocol 2025-06-18 · 1 tools |
| 33 h ago | mcp initialize | ok | 200 | 118 ms | server postal-lookup 3.4.4 · protocol 2025-06-18 · 1 tools |
| 2 d ago | mcp initialize | ok | 200 | 136 ms | server postal-lookup 3.4.4 · protocol 2025-06-18 · 1 tools |
| 2 d ago | mcp initialize | ok | 200 | 111 ms | server postal-lookup 3.4.4 · protocol 2025-06-18 · 1 tools |
| 2 d ago | mcp initialize | ok | 200 | 130 ms | server postal-lookup 3.4.4 · protocol 2025-06-18 · 1 tools |
| 2 d ago | mcp initialize | ok | 200 | 112 ms | server postal-lookup 3.4.4 · protocol 2025-06-18 · 1 tools |
Attributed to the source that supplied each field. Treated as claims, not facts.
No long description beyond the summary.
Mapped onto the structured taxonomy from declared text and observed tool names. Confidence shown for derived entries.
Every source is kept verbatim. Field changes are logged as events.