app.callendar.de
https://app.callendar.de/mcp
61
trust
0.55
confidence
medium
risk
trust-2026-08-12.2
observed 2d ago
Why this score
| tls_present_and_valid | +12 |
| mcp.unauthenticated_consequential_tools | -8 |
| reachable | +6 |
| mcp_capabilities_discoverable | +4 |
| headers.missing_hsts | -3 |
Findings (2)
| medium | Capabilities are listable without authentication, including 1 whose name suggests state change (create_callendar_contact_link) — inferred from tool names, not confirmed mcp.unauthenticated_consequential_tools @ 1.0.0 |
| low | No Strict-Transport-Security header headers.missing_hsts @ 1.0.0 |
Evidence (7)
| Type | Observed | SHA-256 |
|---|---|---|
| dns_resolution_observation | 2d ago | cbcadc39b2338c1b… |
| http_response_observation | 2d ago | 5ed9bb3cc03ceaaf… |
| availability_observation | 2d ago | 481f13bf4572945a… |
| tls_certificate_observation | 2d ago | 18979ccfb8d7426d… |
| oauth_metadata_observation | 2d ago | f29c5cb2fc8f61ac… |
| mcp_protocol_observation | 2d ago | 360a030ca73e5c91… |
| mcp_capability_observation | 2d ago | 389788c2f04731eb… |
Every record is append-only and content-hashed. Corrections supersede; nothing is overwritten.
Operate this service?
Prove control of app.callendar.de to correct the record and request a rescan after fixing a finding. One DNS record — no account needed.