classmarker.usefulapi.io
Raw data · 1 server URL from the Official MCP Registry · simple view
Login-free handshake (initialize → tools/list; unpaid tools/call only on priced tools, to read the payment request; never paid, no credentials): automatic unauthenticated MCP handshake (initialize + tools/list), aiming for about once a day per listed server while we are still working through the registry; priority tier (host looked up via BotsRated preflight/check/report, or also a covered x402 seller, in the last 7 days) about every 6 hours; servers with no MCP answer for 7 days about every 4 days. States are factual: ok (initialize and tools/list answered), auth_required (HTTP 401/403: the server wants a login), handshake_failed (HTTP answer without a valid MCP result), unreachable (no HTTP answer), blocked (not contacted: the URL, a redirect or its DNS points to a private, local or otherwise non-public address, or to another host, which our rules don't allow). Names and descriptions are the registry's text; we don't check it.
| URL | Transport | Registry Name | Last State | HTTP | Protocol | Tools | Recent Checks OK | Median ms | TLS | Last Checked |
|---|---|---|---|---|---|---|---|---|---|---|
https://classmarker.usefulapi.io/mcp | streamable-http | io.usefulapi/classmarker | handshake_failed | 405 | 2025-06-18 | 15 | 4/5 | 866 | ok | 32 h ago |
MCP Check Receipts (Newest First, Up To 10 Per Server)
| Receipt | UTC Time | Path | State | HTTP | ms | Tools | Tools sha256 | Signed |
|---|---|---|---|---|---|---|---|---|
| 27ecf4e211f946594ded | 2026-10-28T08:39:39Z | /mcp | handshake_failed | 405 | 155 | per-receipt | ||
| ede2f7f780eeee01e172 | 2026-10-27T08:39:49Z | /mcp | ok | 200 | 866 | 15 | f514b81cf494 | per-receipt |
| 3881aa63d0e0c3819801 | 2026-10-26T08:39:42Z | /mcp | ok | 200 | 877 | 15 | f514b81cf494 | per-receipt |
| 52db2c00f7eb34afee52 | 2026-10-25T08:39:43Z | /mcp | ok | 200 | 469 | 15 | f514b81cf494 | per-receipt |
| 2e25b365b1aee317c9a9 | 2026-10-24T08:39:46Z | /mcp | ok | 200 | 198 | 15 | f514b81cf494 | per-receipt |
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