x402 Gateway MCP (canonical host): discover the SML x402 payment contract + gateway status. Free.
Until 2026-09-25 this record combined several servers published from one repository. The others now have records of their own: GhostKey — Route Paid APIs with x402, x402 Pay — USDC API Payment Helper, Provider Trust — Verify a Source or Provider. Checks from before that date include them.
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":"scriptmasterlabs-mcp-x402","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.
| when | check | result | http | latency | detail |
|---|---|---|---|---|---|
| 5 h ago | mcp initialize | ok | 200 | 212 ms | server mcp-x402 2.1.11 · protocol 2025-06-18 · 3 tools |
| 5 d ago | mcp initialize | failed | 404 | 226 ms | http 404 |
| 12 d ago | mcp initialize | failed | 404 | 201 ms | http 404 |
| 19 d ago | mcp initialize | failed | 404 | 149 ms | http 404 |
| 25 d ago | mcp initialize | failed | 404 | 323 ms | http 404 |
| 1 mo ago | mcp initialize | ok | 200 | 175 ms | server provider-trust 1.0.1 · protocol 2025-06-18 · 6 tools |
| 1 mo ago | mcp initialize | ok | 200 | 510 ms | server ghostkey 1.0.1 · protocol 2025-06-18 · 4 tools |
| 1 mo ago | mcp initialize | ok | 200 | 558 ms | server x402-pay 1.0.1 · protocol 2025-06-18 · 4 tools |
| 1 mo ago | mcp initialize | ok | 200 | 214 ms | server provider-trust 1.0.1 · protocol 2025-06-18 · 6 tools |
| 1 mo ago | mcp initialize | ok | 200 | 570 ms | server x402-pay 1.0.1 · protocol 2025-06-18 · 4 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.