MCP QUEEN
io.github.lonniev/excalibur-mcp A
FastMCP server for posting formatted content to X (Twitter) — Tollbooth-monetized, DPYC-native
Cloud & Infrav0.34.4streamable-httpexcalibur-mcp.fastmcp.app repository
Grade evidence — probed 2026-07-16 20:31 UTC
| Criterion | Points | Observed |
|---|---|---|
| reachability | 25 / 25 | HTTP 200, initialize accepted in 1686ms |
| protocol | 15 / 15 | valid JSON-RPC initialize result, protocolVersion 2025-06-18, serverInfo eXcalibur@3.0.2 |
| tooling | 35 / 35 | tools/list OK: 67 tools e.g. "excalibur_check_balance"; 67/67 described, 67/67 fully-typed schemas, median description 443 chars |
| latency | 4 / 10 | initialize round-trip 1686ms |
| provenance | 15 / 15 | description present; repository linked; version 0.34.4; namespace io.github.lonniev matches endpoint/repo |
Score 94/100 · latency 1686ms · 67 tools · protocol access: open ⓘ
Trust receipt
Security, data integrity, citation quality, and advertised claims are measured separately from protocol uptime. Missing evidence is marked unverified, never converted into a pass.
| Dimension | Metric | Status | Evidence | Source |
|---|---|---|---|---|
| citation_quality | citation_capability_advertised | unverified | Metadata/tool descriptions advertise citation or evidence capability: pon_id becomes a no-op (the constraint returns neutral on unknown ids) — the Studio surfaces orphan references as warnings. No response-level citation benchmark has verified this claim yet. | live_probe |
| security | sensitive_capabilities_declared | concern | 13 discovered tool(s) advertise potentially state-changing or privileged capabilities. Tool names: excalibur_get_operator_onboarding_status, excalibur_get_patron_onboarding_status, excalibur_request_credential_channel, excalibur_receive_credentials, excalibur_forget_credentials, excalibur_update_patron_credential, excalibur_delete_patron_credential, excalibur_get_patron_credential_fields, excalibur_request_npub_proof, excalibur_receive_npub_proof, excalibur_delete_coupon, excalibur_delete_post, excalibur_delete_snippet. Classification is description-based and does not prove exploitability. Observed value: excalibur_get_operator_onboarding_status, excalibur_get_patron_onboarding_status, excalibur_request_credential_channel, excalibur_receive_credentials, excalibur_forget_credentials, excalibur_update_patron_credential, excalibur_delete_patron_credential, excalibur_get_patron_credential_fields, excalibur_request_npub_proof, excalibur_receive_npub_proof, excalibur_delete_coupon, excalibur_delete_post, excalibur_delete_snippet Sample: n=13 | live_probe |
| security | authentication_boundary | observed | Live protocol probe observed auth_state=open. This describes discovery/access behavior; it is not by itself a vulnerability finding. Observed value: open | live_probe |
Machine-readable receipt: /api/trust/io.github.lonniev/excalibur-mcp.json
Connect your agent
Claude Code:
claude mcp add --transport http excalibur-mcp https://excalibur-mcp.fastmcp.app/mcp
Generic MCP client config:
{ "mcpServers": { "excalibur-mcp": { "type": "http", "url": "https://excalibur-mcp.fastmcp.app/mcp" } } }
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[](https://mcpqueen.com/s/io.github.lonniev/excalibur-mcp)
Think the grade is wrong? Fix the finding the evidence shows, then the next probe cycle picks it up automatically (full cycle ≈ 3 days) — or open a dispute via the MCP endpoint.
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Probe history
| When (UTC) | Grade | Score | Latency |
|---|---|---|---|
| 2026-07-16 20:31 | A | 94 | 1686ms |