{
  "$schema": "https://verifymcp.io/schemas/changelog.json",
  "server": "io-usefulapi-clinicaltrialsgov",
  "component": "clinicaltrialsgov",
  "generated_at": "2026-10-04T10:58:33.234Z",
  "tracking_since": "2026-09-29",
  "counts": {
    "critical": 0,
    "security": 13,
    "functional": 0,
    "cosmetic": 0
  },
  "events": [
    {
      "id": "chg_01a0ff97-0b8c-7d0c-abad-f1540f7060aa",
      "kind": "check.verdict",
      "family": "transport",
      "subject_kind": "check",
      "subject": "transport",
      "subject_child": "",
      "from_code": "transport.verified",
      "to_code": "transport.http_error",
      "from_value": "pass",
      "to_value": "fail",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "status": "429",
        "transport": "streamable-http"
      },
      "occurred_on": "2026-10-03",
      "occurred_at": "2026-10-03 02:28:04.042568+00",
      "observed_since": "2026-10-02",
      "source": "scan",
      "summary": "Transport (pass → fail)",
      "link": "https://verifymcp.io/servers/io-usefulapi-clinicaltrialsgov/clinicaltrialsgov#chg-chg_01a0ff97-0b8c-7d0c-abad-f1540f7060aa"
    },
    {
      "id": "chg_01a0ff97-0b8d-775c-bff3-5a37d9702277",
      "kind": "check.unverifiable",
      "family": "tool-safety-injection",
      "subject_kind": "check",
      "subject": "tool-safety-injection",
      "subject_child": "",
      "from_code": "toolsafety.injection_clean",
      "to_code": "toolsafety.unreachable",
      "from_value": "pass",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-10-03",
      "occurred_at": "2026-10-03 02:28:04.042568+00",
      "observed_since": "2026-10-02",
      "source": "scan",
      "summary": "Tool safety (pass → unverified)",
      "link": "https://verifymcp.io/servers/io-usefulapi-clinicaltrialsgov/clinicaltrialsgov#chg-chg_01a0ff97-0b8d-775c-bff3-5a37d9702277"
    },
    {
      "id": "chg_01a0ff97-0b8d-7d05-90f9-7b68d8ebadaf",
      "kind": "check.unverifiable",
      "family": "https",
      "subject_kind": "check",
      "subject": "https",
      "subject_child": "",
      "from_code": "https.enforced",
      "to_code": "https.inconclusive",
      "from_value": "pass",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "reason": "plaintext_status",
        "status": "429"
      },
      "occurred_on": "2026-10-03",
      "occurred_at": "2026-10-03 02:28:04.042568+00",
      "observed_since": "2026-10-02",
      "source": "scan",
      "summary": "HTTPS (pass → unverified)",
      "link": "https://verifymcp.io/servers/io-usefulapi-clinicaltrialsgov/clinicaltrialsgov#chg-chg_01a0ff97-0b8d-7d05-90f9-7b68d8ebadaf"
    },
    {
      "id": "chg_01a0ff97-0b8e-71f7-aeb7-a86e50d4243f",
      "kind": "check.unverifiable",
      "family": "auth-oauth",
      "subject_kind": "check",
      "subject": "auth-oauth",
      "subject_child": "",
      "from_code": "auth.rfc9728_invoke",
      "to_code": "auth.unreachable",
      "from_value": "pass",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-10-03",
      "occurred_at": "2026-10-03 02:28:04.042568+00",
      "observed_since": "2026-10-02",
      "source": "scan",
      "summary": "Authorization (pass → unverified)",
      "link": "https://verifymcp.io/servers/io-usefulapi-clinicaltrialsgov/clinicaltrialsgov#chg-chg_01a0ff97-0b8e-71f7-aeb7-a86e50d4243f"
    },
    {
      "id": "chg_01a0ff97-0b8e-7ea5-bae7-e6e127ce4bf9",
      "kind": "capture.status_changed",
      "family": "",
      "subject_kind": "server",
      "subject": "capture",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": "verified",
      "to_value": "not_mcp",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "to": "not_mcp",
        "from": "verified"
      },
      "occurred_on": "2026-10-03",
      "occurred_at": "2026-10-03 02:28:04.042568+00",
      "observed_since": "2026-10-02",
      "source": "scan",
      "summary": "Endpoint reachability (reachable → not serving MCP)",
      "link": "https://verifymcp.io/servers/io-usefulapi-clinicaltrialsgov/clinicaltrialsgov#chg-chg_01a0ff97-0b8e-7ea5-bae7-e6e127ce4bf9"
    },
    {
      "id": "chg_01a0fa70-d08d-7999-b58e-0b0b54a02e7c",
      "kind": "check.reverified",
      "family": "auth-oauth",
      "subject_kind": "check",
      "subject": "auth-oauth",
      "subject_child": "",
      "from_code": "auth.none_unlisted",
      "to_code": "auth.rfc9728_invoke",
      "from_value": "unverified",
      "to_value": "pass",
      "materiality": "security",
      "direction": "improvement",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-10-02",
      "occurred_at": "2026-10-02 02:28:12.455684+00",
      "observed_since": "2026-10-01",
      "source": "scan",
      "summary": "Authorization (unverified → pass)",
      "link": "https://verifymcp.io/servers/io-usefulapi-clinicaltrialsgov/clinicaltrialsgov#chg-chg_01a0fa70-d08d-7999-b58e-0b0b54a02e7c"
    },
    {
      "id": "chg_01a0fa70-d08e-700e-bc8b-ac7868d3d7bc",
      "kind": "check.reverified",
      "family": "tool-safety-injection",
      "subject_kind": "check",
      "subject": "tool-safety-injection",
      "subject_child": "",
      "from_code": "toolsafety.unreachable",
      "to_code": "toolsafety.injection_clean",
      "from_value": "unverified",
      "to_value": "pass",
      "materiality": "security",
      "direction": "improvement",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-10-02",
      "occurred_at": "2026-10-02 02:28:12.455684+00",
      "observed_since": "2026-10-01",
      "source": "scan",
      "summary": "Injection markers (unverified → pass)",
      "link": "https://verifymcp.io/servers/io-usefulapi-clinicaltrialsgov/clinicaltrialsgov#chg-chg_01a0fa70-d08e-700e-bc8b-ac7868d3d7bc"
    },
    {
      "id": "chg_01a0fa70-d08e-7bf6-a7ce-04e6e2e15cb8",
      "kind": "check.appeared",
      "family": "tool-safety-manipulation",
      "subject_kind": "check",
      "subject": "tool-safety-manipulation",
      "subject_child": "",
      "from_code": null,
      "to_code": "toolsafety.manipulation_clean",
      "from_value": null,
      "to_value": "pass",
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "units": "7",
        "judged": "7"
      },
      "occurred_on": "2026-10-02",
      "occurred_at": "2026-10-02 02:28:12.455684+00",
      "observed_since": "2026-10-01",
      "source": "scan",
      "summary": "First check of Judged manipulation (pass)",
      "link": "https://verifymcp.io/servers/io-usefulapi-clinicaltrialsgov/clinicaltrialsgov#chg-chg_01a0fa70-d08e-7bf6-a7ce-04e6e2e15cb8"
    },
    {
      "id": "chg_01a0fa70-d08f-732b-98d9-06e82b4a9123",
      "kind": "check.appeared",
      "family": "auth-registration",
      "subject_kind": "check",
      "subject": "auth-registration",
      "subject_child": "",
      "from_code": null,
      "to_code": "auth.registration_dcr_only",
      "from_value": null,
      "to_value": "partial",
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-10-02",
      "occurred_at": "2026-10-02 02:28:12.455684+00",
      "observed_since": "2026-10-01",
      "source": "scan",
      "summary": "First check of Authorization (partial)",
      "link": "https://verifymcp.io/servers/io-usefulapi-clinicaltrialsgov/clinicaltrialsgov#chg-chg_01a0fa70-d08f-732b-98d9-06e82b4a9123"
    },
    {
      "id": "chg_01a0f54a-19cd-7e34-81d8-6c8124b679d5",
      "kind": "check.reverified",
      "family": "transport",
      "subject_kind": "check",
      "subject": "transport",
      "subject_child": "",
      "from_code": "transport.auth_gated",
      "to_code": "transport.verified",
      "from_value": "unverified",
      "to_value": "pass",
      "materiality": "security",
      "direction": "improvement",
      "score_delta": null,
      "detail": {
        "transport": "streamable-http"
      },
      "occurred_on": "2026-10-01",
      "occurred_at": "2026-10-01 02:27:49.246236+00",
      "observed_since": "2026-09-30",
      "source": "scan",
      "summary": "Transport (unverified → pass)",
      "link": "https://verifymcp.io/servers/io-usefulapi-clinicaltrialsgov/clinicaltrialsgov#chg-chg_01a0f54a-19cd-7e34-81d8-6c8124b679d5"
    },
    {
      "id": "chg_01a0f54a-19cf-74aa-8a21-a8f995f500b6",
      "kind": "check.reverified",
      "family": "https",
      "subject_kind": "check",
      "subject": "https",
      "subject_child": "",
      "from_code": "https.inconclusive",
      "to_code": "https.enforced",
      "from_value": "unverified",
      "to_value": "pass",
      "materiality": "security",
      "direction": "improvement",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-10-01",
      "occurred_at": "2026-10-01 02:27:49.246236+00",
      "observed_since": "2026-09-30",
      "source": "scan",
      "summary": "HTTPS (unverified → pass)",
      "link": "https://verifymcp.io/servers/io-usefulapi-clinicaltrialsgov/clinicaltrialsgov#chg-chg_01a0f54a-19cf-74aa-8a21-a8f995f500b6"
    },
    {
      "id": "chg_01a0f54a-19cf-7b50-bf52-7a52416d25b1",
      "kind": "check.reason",
      "family": "auth-oauth",
      "subject_kind": "check",
      "subject": "auth-oauth",
      "subject_child": "",
      "from_code": "auth.unreachable",
      "to_code": "auth.none_unlisted",
      "from_value": "unverified",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-10-01",
      "occurred_at": "2026-10-01 02:27:49.246236+00",
      "observed_since": "2026-09-30",
      "source": "scan",
      "summary": "Authorization (Authorisation not fully verified: no authorisation is required to connect, but we couldn't read the whole tool list to see what that exposes.)",
      "link": "https://verifymcp.io/servers/io-usefulapi-clinicaltrialsgov/clinicaltrialsgov#chg-chg_01a0f54a-19cf-7b50-bf52-7a52416d25b1"
    },
    {
      "id": "chg_01a0f024-1258-703a-8f0f-9414bd47247b",
      "kind": "check.unverifiable",
      "family": "transport",
      "subject_kind": "check",
      "subject": "transport",
      "subject_child": "",
      "from_code": "transport.http_error",
      "to_code": "transport.auth_gated",
      "from_value": "fail",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "transport": "streamable-http"
      },
      "occurred_on": "2026-09-30",
      "occurred_at": "2026-09-30 02:28:10.87256+00",
      "observed_since": "2026-09-29",
      "source": "scan",
      "summary": "Transport (fail → unverified)",
      "link": "https://verifymcp.io/servers/io-usefulapi-clinicaltrialsgov/clinicaltrialsgov#chg-chg_01a0f024-1258-703a-8f0f-9414bd47247b"
    }
  ],
  "days": [
    {
      "date": "2026-10-03",
      "total": 18,
      "delta": -57,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 7
    },
    {
      "date": "2026-10-02",
      "total": 75,
      "delta": 42,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 11
    },
    {
      "date": "2026-10-01",
      "total": 33,
      "delta": 15,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 3
    },
    {
      "date": "2026-09-30",
      "total": 18,
      "delta": 0,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 1
    },
    {
      "date": "2026-09-29",
      "total": 18,
      "delta": null,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 0
    }
  ]
}