Send real, postmarked US physical mail — letters, certified letters, postcards. No signup: pay-per-piece via Stripe Shared Payment Tokens over the Machine Payments Protocol (HTTP 402). Interact via the Mailsnail MCP server (npx -y mailsnail, stdio) or the REST API at https://api.mailsnail.dev (Open…
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":"mailsnail-mailsnail","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 |
|---|---|---|---|---|---|
| 17 h ago | a2a card | failed | 404 | 311 ms | http 404 |
| 2 d ago | a2a card | failed | 404 | 242 ms | http 404 |
| 2 d ago | a2a card | failed | 404 | 306 ms | http 404 |
Attributed to the source that supplied each field. Treated as claims, not facts.
Send real, postmarked US physical mail — letters, certified letters, postcards. No signup: pay-per-piece via Stripe Shared Payment Tokens over the Machine Payments Protocol (HTTP 402). Interact via the Mailsnail MCP server (npx -y mailsnail, stdio) or the REST API at https://api.mailsnail.dev (OpenAPI: https://mailsnail.dev/openapi.json). This card is discovery metadata; the service speaks MCP and REST rather than A2A JSON-RPC.
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.