{
  "$schema": "https://verifymcp.io/schemas/changelog.json",
  "server": "arcar-org-arcar-mcp",
  "component": "mcp-arcar-org",
  "generated_at": "2026-09-20T16:05:00.258Z",
  "tracking_since": "2026-07-26",
  "counts": {
    "critical": 0,
    "security": 21,
    "functional": 0,
    "cosmetic": 0
  },
  "events": [
    {
      "id": "chg_01a0a33e-9d6a-7bd9-8e38-f8b533fd5d75",
      "kind": "check.verdict",
      "family": "transport",
      "subject_kind": "check",
      "subject": "transport",
      "subject_child": "",
      "from_code": "transport.http_error",
      "to_code": "transport.verified",
      "from_value": "fail",
      "to_value": "pass",
      "materiality": "security",
      "direction": "improvement",
      "score_delta": null,
      "detail": {
        "transport": "sse"
      },
      "occurred_on": "2026-09-15",
      "occurred_at": "2026-09-15 04:06:24.716308+00",
      "observed_since": "2026-09-14",
      "source": "scan",
      "summary": "Transport (fail → pass)",
      "link": "https://verifymcp.io/servers/arcar-org-arcar-mcp/mcp-arcar-org#chg-chg_01a0a33e-9d6a-7bd9-8e38-f8b533fd5d75"
    },
    {
      "id": "chg_01a0a33e-9d6c-7b14-94de-4cd811204580",
      "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": "2026-09-15",
      "occurred_at": "2026-09-15 04:06:24.716308+00",
      "observed_since": "2026-09-14",
      "source": "scan",
      "summary": "Injection markers (unverified → pass)",
      "link": "https://verifymcp.io/servers/arcar-org-arcar-mcp/mcp-arcar-org#chg-chg_01a0a33e-9d6c-7b14-94de-4cd811204580"
    },
    {
      "id": "chg_01a0a33e-9d6d-7a7d-bb5c-8c743dc46917",
      "kind": "check.reverified",
      "family": "stability",
      "subject_kind": "check",
      "subject": "stability",
      "subject_child": "",
      "from_code": "stability.insufficient_history",
      "to_code": "stability.stable",
      "from_value": "unverified",
      "to_value": "pass",
      "materiality": "security",
      "direction": "improvement",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-09-15",
      "occurred_at": "2026-09-15 04:06:24.716308+00",
      "observed_since": "2026-09-14",
      "source": "scan",
      "summary": "Stability (unverified → pass)",
      "link": "https://verifymcp.io/servers/arcar-org-arcar-mcp/mcp-arcar-org#chg-chg_01a0a33e-9d6d-7a7d-bb5c-8c743dc46917"
    },
    {
      "id": "chg_01a0a33e-9d6e-7ac2-b893-80560dfcd2eb",
      "kind": "check.reason",
      "family": "auth-oauth",
      "subject_kind": "check",
      "subject": "auth-oauth",
      "subject_child": "",
      "from_code": "auth.none_unlisted",
      "to_code": "auth.none_undeclared",
      "from_value": "unverified",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "auth": "none",
        "undeclared_tools": "6"
      },
      "occurred_on": "2026-09-15",
      "occurred_at": "2026-09-15 04:06:24.716308+00",
      "observed_since": "2026-09-14",
      "source": "scan",
      "summary": "Authorization (Authorisation not fully verified: no authorisation is required to call this server, and 6 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe.)",
      "link": "https://verifymcp.io/servers/arcar-org-arcar-mcp/mcp-arcar-org#chg-chg_01a0a33e-9d6e-7ac2-b893-80560dfcd2eb"
    },
    {
      "id": "chg_01a09e17-939a-7d3e-8fe8-a3752d5b2d79",
      "kind": "check.unverifiable",
      "family": "stability",
      "subject_kind": "check",
      "subject": "stability",
      "subject_child": "",
      "from_code": "stability.stable",
      "to_code": "stability.insufficient_history",
      "from_value": "pass",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-09-14",
      "occurred_at": "2026-09-14 04:05:40.275947+00",
      "observed_since": "2026-09-13",
      "source": "scan",
      "summary": "Stability (pass → unverified)",
      "link": "https://verifymcp.io/servers/arcar-org-arcar-mcp/mcp-arcar-org#chg-chg_01a09e17-939a-7d3e-8fe8-a3752d5b2d79"
    },
    {
      "id": "chg_01a09e17-939b-7f23-86f4-18d746729de0",
      "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": "502",
        "transport": "sse"
      },
      "occurred_on": "2026-09-14",
      "occurred_at": "2026-09-14 04:05:40.275947+00",
      "observed_since": "2026-09-13",
      "source": "scan",
      "summary": "Transport (pass → fail)",
      "link": "https://verifymcp.io/servers/arcar-org-arcar-mcp/mcp-arcar-org#chg-chg_01a09e17-939b-7f23-86f4-18d746729de0"
    },
    {
      "id": "chg_01a09e17-939c-7647-9b47-a146e7a16b90",
      "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": "2026-09-14",
      "occurred_at": "2026-09-14 04:05:40.275947+00",
      "observed_since": "2026-09-13",
      "source": "scan",
      "summary": "Tool safety (pass → unverified)",
      "link": "https://verifymcp.io/servers/arcar-org-arcar-mcp/mcp-arcar-org#chg-chg_01a09e17-939c-7647-9b47-a146e7a16b90"
    },
    {
      "id": "chg_01a09e17-939c-7ca8-aea7-88d167f1e70c",
      "kind": "check.reason",
      "family": "auth-oauth",
      "subject_kind": "check",
      "subject": "auth-oauth",
      "subject_child": "",
      "from_code": "auth.none_undeclared",
      "to_code": "auth.none_unlisted",
      "from_value": "unverified",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-09-14",
      "occurred_at": "2026-09-14 04:05:40.275947+00",
      "observed_since": "2026-09-13",
      "source": "scan",
      "summary": "Authorization (Authorisation not fully verified: no authorisation is required to connect, but we couldn't read the tool list to see what that exposes.)",
      "link": "https://verifymcp.io/servers/arcar-org-arcar-mcp/mcp-arcar-org#chg-chg_01a09e17-939c-7ca8-aea7-88d167f1e70c"
    },
    {
      "id": "chg_01a09e17-939d-7d4e-80bf-1127c4e7a358",
      "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": "2026-09-14",
      "occurred_at": "2026-09-14 04:05:40.275947+00",
      "observed_since": "2026-09-13",
      "source": "scan",
      "summary": "Endpoint reachability (reachable → not serving MCP)",
      "link": "https://verifymcp.io/servers/arcar-org-arcar-mcp/mcp-arcar-org#chg-chg_01a09e17-939d-7d4e-80bf-1127c4e7a358"
    },
    {
      "id": "chg_01a08ea4-b065-7b77-a9d3-012475f914a6",
      "kind": "check.reverified",
      "family": "hsts",
      "subject_kind": "check",
      "subject": "hsts",
      "subject_child": "",
      "from_code": "headers.inconclusive",
      "to_code": "headers.hsts_absent",
      "from_value": "unverified",
      "to_value": "fail",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-09-11",
      "occurred_at": "2026-09-11 04:05:52.655801+00",
      "observed_since": "2026-09-10",
      "source": "scan",
      "summary": "HSTS header (unverified → fail)",
      "link": "https://verifymcp.io/servers/arcar-org-arcar-mcp/mcp-arcar-org#chg-chg_01a08ea4-b065-7b77-a9d3-012475f914a6"
    },
    {
      "id": "chg_01a08ea4-b067-739e-ae22-5a37e902f9fc",
      "kind": "check.verdict",
      "family": "transport",
      "subject_kind": "check",
      "subject": "transport",
      "subject_child": "",
      "from_code": "transport.unreachable",
      "to_code": "transport.verified",
      "from_value": "fail",
      "to_value": "pass",
      "materiality": "security",
      "direction": "improvement",
      "score_delta": null,
      "detail": {
        "transport": "sse"
      },
      "occurred_on": "2026-09-11",
      "occurred_at": "2026-09-11 04:05:52.655801+00",
      "observed_since": "2026-09-10",
      "source": "scan",
      "summary": "Transport (fail → pass)",
      "link": "https://verifymcp.io/servers/arcar-org-arcar-mcp/mcp-arcar-org#chg-chg_01a08ea4-b067-739e-ae22-5a37e902f9fc"
    },
    {
      "id": "chg_01a08ea4-b067-7b1f-9367-195dd72d7de6",
      "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": "2026-09-11",
      "occurred_at": "2026-09-11 04:05:52.655801+00",
      "observed_since": "2026-09-10",
      "source": "scan",
      "summary": "Injection markers (unverified → pass)",
      "link": "https://verifymcp.io/servers/arcar-org-arcar-mcp/mcp-arcar-org#chg-chg_01a08ea4-b067-7b1f-9367-195dd72d7de6"
    },
    {
      "id": "chg_01a08ea4-b068-70fa-ba31-8c34d0583558",
      "kind": "check.reverified",
      "family": "stability",
      "subject_kind": "check",
      "subject": "stability",
      "subject_child": "",
      "from_code": "stability.insufficient_history",
      "to_code": "stability.stable",
      "from_value": "unverified",
      "to_value": "pass",
      "materiality": "security",
      "direction": "improvement",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-09-11",
      "occurred_at": "2026-09-11 04:05:52.655801+00",
      "observed_since": "2026-09-10",
      "source": "scan",
      "summary": "Stability (unverified → pass)",
      "link": "https://verifymcp.io/servers/arcar-org-arcar-mcp/mcp-arcar-org#chg-chg_01a08ea4-b068-70fa-ba31-8c34d0583558"
    },
    {
      "id": "chg_01a08ea4-b068-7801-a95a-3c0b68c253ee",
      "kind": "check.reason",
      "family": "auth-oauth",
      "subject_kind": "check",
      "subject": "auth-oauth",
      "subject_child": "",
      "from_code": "auth.unreachable",
      "to_code": "auth.none_undeclared",
      "from_value": "unverified",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "auth": "none",
        "undeclared_tools": "6"
      },
      "occurred_on": "2026-09-11",
      "occurred_at": "2026-09-11 04:05:52.655801+00",
      "observed_since": "2026-09-10",
      "source": "scan",
      "summary": "Authorization (Authorisation not fully verified: no authorisation is required to call this server, and 6 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe.)",
      "link": "https://verifymcp.io/servers/arcar-org-arcar-mcp/mcp-arcar-org#chg-chg_01a08ea4-b068-7801-a95a-3c0b68c253ee"
    },
    {
      "id": "chg_01a0897f-8db1-794b-b52c-67f82369d51b",
      "kind": "check.unverifiable",
      "family": "hsts",
      "subject_kind": "check",
      "subject": "hsts",
      "subject_child": "",
      "from_code": "headers.hsts_absent",
      "to_code": "headers.inconclusive",
      "from_value": "fail",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-09-10",
      "occurred_at": "2026-09-10 04:07:12.96795+00",
      "observed_since": "2026-09-09",
      "source": "scan",
      "summary": "HSTS header (fail → unverified)",
      "link": "https://verifymcp.io/servers/arcar-org-arcar-mcp/mcp-arcar-org#chg-chg_01a0897f-8db1-794b-b52c-67f82369d51b"
    },
    {
      "id": "chg_01a0897f-8db3-7248-bac9-29d504c31869",
      "kind": "check.unverifiable",
      "family": "stability",
      "subject_kind": "check",
      "subject": "stability",
      "subject_child": "",
      "from_code": "stability.stable",
      "to_code": "stability.insufficient_history",
      "from_value": "pass",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-09-10",
      "occurred_at": "2026-09-10 04:07:12.96795+00",
      "observed_since": "2026-09-09",
      "source": "scan",
      "summary": "Stability (pass → unverified)",
      "link": "https://verifymcp.io/servers/arcar-org-arcar-mcp/mcp-arcar-org#chg-chg_01a0897f-8db3-7248-bac9-29d504c31869"
    },
    {
      "id": "chg_01a0897f-8db3-7806-9bcf-d2be305a82e8",
      "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": "2026-09-10",
      "occurred_at": "2026-09-10 04:07:12.96795+00",
      "observed_since": "2026-09-09",
      "source": "scan",
      "summary": "Tool safety (pass → unverified)",
      "link": "https://verifymcp.io/servers/arcar-org-arcar-mcp/mcp-arcar-org#chg-chg_01a0897f-8db3-7806-9bcf-d2be305a82e8"
    },
    {
      "id": "chg_01a0897f-8db4-730b-91b9-e486555f52ca",
      "kind": "check.verdict",
      "family": "transport",
      "subject_kind": "check",
      "subject": "transport",
      "subject_child": "",
      "from_code": "transport.verified",
      "to_code": "transport.unreachable",
      "from_value": "pass",
      "to_value": "fail",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "transport": "sse"
      },
      "occurred_on": "2026-09-10",
      "occurred_at": "2026-09-10 04:07:12.96795+00",
      "observed_since": "2026-09-09",
      "source": "scan",
      "summary": "Transport (pass → fail)",
      "link": "https://verifymcp.io/servers/arcar-org-arcar-mcp/mcp-arcar-org#chg-chg_01a0897f-8db4-730b-91b9-e486555f52ca"
    },
    {
      "id": "chg_01a0897f-8db4-79f2-a69d-92f4a9ac8ae8",
      "kind": "check.reason",
      "family": "auth-oauth",
      "subject_kind": "check",
      "subject": "auth-oauth",
      "subject_child": "",
      "from_code": "auth.none_undeclared",
      "to_code": "auth.unreachable",
      "from_value": "unverified",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-09-10",
      "occurred_at": "2026-09-10 04:07:12.96795+00",
      "observed_since": "2026-09-09",
      "source": "scan",
      "summary": "Authorization (Authorisation not yet verified: we couldn't confirm whether this endpoint requires it.)",
      "link": "https://verifymcp.io/servers/arcar-org-arcar-mcp/mcp-arcar-org#chg-chg_01a0897f-8db4-79f2-a69d-92f4a9ac8ae8"
    },
    {
      "id": "chg_01a0897f-8db6-711d-a498-74fd42dfff4e",
      "kind": "capture.status_changed",
      "family": "",
      "subject_kind": "server",
      "subject": "capture",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": "verified",
      "to_value": "unreachable",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "to": "unreachable",
        "from": "verified"
      },
      "occurred_on": "2026-09-10",
      "occurred_at": "2026-09-10 04:07:12.96795+00",
      "observed_since": "2026-09-09",
      "source": "scan",
      "summary": "Endpoint reachability (reachable → unreachable)",
      "link": "https://verifymcp.io/servers/arcar-org-arcar-mcp/mcp-arcar-org#chg-chg_01a0897f-8db6-711d-a498-74fd42dfff4e"
    },
    {
      "id": "chg_01a03719-3065-76ba-9f68-455bef8dff41",
      "kind": "check.verdict",
      "family": "stability",
      "subject_kind": "check",
      "subject": "stability",
      "subject_child": "",
      "from_code": "stability.building_history",
      "to_code": "stability.stable",
      "from_value": "0.97",
      "to_value": "pass",
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-08-25",
      "occurred_at": "2026-08-25 04:06:32.703191+00",
      "observed_since": "2026-08-24",
      "source": "scan",
      "summary": "Stability (0.97 → pass)",
      "link": "https://verifymcp.io/servers/arcar-org-arcar-mcp/mcp-arcar-org#chg-chg_01a03719-3065-76ba-9f68-455bef8dff41"
    }
  ],
  "days": [
    {
      "date": "2026-09-15",
      "total": 69,
      "delta": 46,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 7
    },
    {
      "date": "2026-09-14",
      "total": 23,
      "delta": -46,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 7
    },
    {
      "date": "2026-09-11",
      "total": 69,
      "delta": 0,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 8
    },
    {
      "date": "2026-09-10",
      "total": 69,
      "delta": 0,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 9
    },
    {
      "date": "2026-08-26",
      "total": 69,
      "delta": 1,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 1
    },
    {
      "date": "2026-08-25",
      "total": 68,
      "delta": 1,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 1
    },
    {
      "date": "2026-08-23",
      "total": 67,
      "delta": 1,
      "tracked": true,
      "explained": false,
      "beyond_event_horizon": false,
      "attribution": {
        "category": "Stability & Change Management",
        "from": 90,
        "to": 93,
        "delta": 3,
        "others": [],
        "accrual": {
          "code": "stability.building_history",
          "from_days": 27,
          "to_days": 28
        },
        "partial": false,
        "compared_to": "2026-08-22",
        "summary": "No change was recorded against any check on this day. Stability & Change Management went from 90 to 93. That category is still filling its 30-day observation window: 27 days of observed history at the previous scan, 28 at this one. The score rises as the window fills, whether or not the server changes."
      },
      "event_count": 0
    },
    {
      "date": "2026-08-11",
      "total": 0,
      "delta": null,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 1
    }
  ]
}