caliper.fit
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://caliper.fit/mcp | streamable-http | fit.caliper/caliper | ok | 200 | 2025-06-18 | 10 | 5/5 | 89 | ok | 10 h ago |
Paid Tools
| Tool | Stated Price | Payment Request Asks | Network | Pays To | Stated Vs Asked |
|---|---|---|---|---|---|
| format_auto | $0.02 | – | No payment request returned |
From our unpaid check: the tool list, plus at most 2 unpaid calls to tools that state a price, only to read the payment request. We never pay and never call tools that don't state a price. Stated prices are the server's own text or metadata. Full details: free quick check (JSON).
MCP Check Receipts (Newest First, Up To 10 Per Server)
| Receipt | UTC Time | Path | State | HTTP | ms | Tools | Tools sha256 | Signed |
|---|---|---|---|---|---|---|---|---|
| b340d6524ba6056ebbca | 2026-10-28T03:27:43Z | /mcp | ok | 200 | 494 | 10 | d7b613794af2 | per-receipt |
| fbb765ed708918586d09 | 2026-10-27T03:27:39Z | /mcp | ok | 200 | 76 | 10 | d7b613794af2 | per-receipt |
| f91aa81e4f0ce45f6125 | 2026-10-26T03:27:38Z | /mcp | ok | 200 | 72 | 10 | d7b613794af2 | per-receipt |
| 8a85ee0e0ed14b6f7b1a | 2026-10-24T08:21:52Z | /mcp | ok | 200 | 207 | 10 | d7b613794af2 | per-receipt |
| 54752117622b8c2c8435 | 2026-10-24T03:27:37Z | /mcp | ok | 200 | 89 | 10 | d7b613794af2 | per-receipt |
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