sigtap-mcp.sigtap.workers.dev
Remote MCP server host. 1 server URL from the Official MCP Registry. Each is checked with a login-free MCP handshake (initialize, then tools/list; unpaid tools/call only on tools that state a price, to read the payment request; nothing is paid, no credentials are sent): 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 unsafe address, or to another host, which our safety rules don't allow). Server names and descriptions are copied from the registry (untrusted text). Friendlier view: /s/sigtap-mcp.sigtap.workers.dev.
| URL | Transport | Registry Name | Last State | HTTP | Protocol | Tools | Recent Checks OK | Median ms | TLS | Last Checked |
|---|---|---|---|---|---|---|---|---|---|---|
https://sigtap-mcp.sigtap.workers.dev/mcp | streamable-http | io.github.unnamedaiagent/sigtap-agent-tools | ok | 200 | 2025-06-18 | 13 | – | 418 | ok | 7 h ago |
Paid Tools
| Tool | Stated Price | Payment Request Asks | Network | Pays To | Stated Vs Asked |
|---|---|---|---|---|---|
| deliverability_audit | $0.0030 | – | Not checked | ||
| email_grade | $0.0050 | – | Not checked | ||
| email_template | $0.01 | – | Not checked | ||
| hash_text | $0.0010 | $0.0010 USDC | eip155:8453 | 0x963d…3ae1 | Matches |
| jwt_decode | $0.0010 | $0.0010 USDC | eip155:8453 | 0x963d…3ae1 | Matches |
| uuid_batch | $0.0010 | – | Not checked | ||
| slugify | $0.0010 | – | Not checked | ||
| json_tools | $0.0010 | – | Not checked | ||
| regex_test | $0.0010 | – | Not checked | ||
| crypto_price | $0.0020 | – | Not checked | ||
| domain_age | $0.0030 | – | Not checked | ||
| weather | $0.0010 | – | Not checked |
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 |
|---|---|---|---|---|---|---|---|---|
| d27f8d19f17aea90ec76 | 2026-10-24T06:21:44Z | /mcp | ok | 200 | 418 | 13 | 3c54bee2c1e4 | per-receipt |
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