{
  "$schema": "https://verifymcp.io/schemas/changelog.json",
  "server": "nexus-mcp-infra-useful-data-source-for-agents-doing-product-price-sdk",
  "component": "useful-data-source-for-agents-production",
  "generated_at": "2026-09-25T09:05:27.699Z",
  "tracking_since": "2026-07-26",
  "counts": {
    "critical": 0,
    "security": 17,
    "functional": 0,
    "cosmetic": 0
  },
  "events": [
    {
      "id": "chg_01a08aca-fc0c-7b1e-b7e5-e32d4a6eaaba",
      "kind": "check.unverifiable",
      "family": "stability",
      "subject_kind": "check",
      "subject": "stability",
      "subject_child": "",
      "from_code": "stability.building_history",
      "to_code": "stability.insufficient_history",
      "from_value": "0.43",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-09-10",
      "occurred_at": "2026-09-10 10:09:13.47082+00",
      "observed_since": "2026-09-09",
      "source": "scan",
      "summary": "Stability (0.43 → unverified)",
      "link": "https://verifymcp.io/servers/nexus-mcp-infra-useful-data-source-for-agents-doing-product-price-sdk/useful-data-source-for-agents-production#chg-chg_01a08aca-fc0c-7b1e-b7e5-e32d4a6eaaba"
    },
    {
      "id": "chg_01a08aca-fc0d-78d3-8f04-bbd8a4af8fde",
      "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": "404",
        "transport": "streamable-http"
      },
      "occurred_on": "2026-09-10",
      "occurred_at": "2026-09-10 10:09:13.47082+00",
      "observed_since": "2026-09-09",
      "source": "scan",
      "summary": "Transport (pass → fail)",
      "link": "https://verifymcp.io/servers/nexus-mcp-infra-useful-data-source-for-agents-doing-product-price-sdk/useful-data-source-for-agents-production#chg-chg_01a08aca-fc0d-78d3-8f04-bbd8a4af8fde"
    },
    {
      "id": "chg_01a08aca-fc0d-7cb3-94ce-ca3b1929d422",
      "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 10:09:13.47082+00",
      "observed_since": "2026-09-09",
      "source": "scan",
      "summary": "Tool safety (pass → unverified)",
      "link": "https://verifymcp.io/servers/nexus-mcp-infra-useful-data-source-for-agents-doing-product-price-sdk/useful-data-source-for-agents-production#chg-chg_01a08aca-fc0d-7cb3-94ce-ca3b1929d422"
    },
    {
      "id": "chg_01a08aca-fc0e-70fc-b2e7-4877833733f4",
      "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": "2026-09-10",
      "occurred_at": "2026-09-10 10:09:13.47082+00",
      "observed_since": "2026-09-09",
      "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/nexus-mcp-infra-useful-data-source-for-agents-doing-product-price-sdk/useful-data-source-for-agents-production#chg-chg_01a08aca-fc0e-70fc-b2e7-4877833733f4"
    },
    {
      "id": "chg_01a08aca-fc0e-7ca1-8f51-29e337b6c650",
      "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": "2026-09-10",
      "occurred_at": "2026-09-10 10:09:13.47082+00",
      "observed_since": "2026-09-09",
      "source": "scan",
      "summary": "Endpoint reachability (reachable → not serving MCP)",
      "link": "https://verifymcp.io/servers/nexus-mcp-infra-useful-data-source-for-agents-doing-product-price-sdk/useful-data-source-for-agents-production#chg-chg_01a08aca-fc0e-7ca1-8f51-29e337b6c650"
    },
    {
      "id": "chg_01a042b3-a1cb-7761-a651-dd61e10c2cf9",
      "kind": "check.reverified",
      "family": "stability",
      "subject_kind": "check",
      "subject": "stability",
      "subject_child": "",
      "from_code": "stability.insufficient_history",
      "to_code": "stability.churn",
      "from_value": "unverified",
      "to_value": "fail",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "days": "30",
        "added": "3",
        "breaks": "0",
        "removed": "2",
        "auth_transport": "0"
      },
      "occurred_on": "2026-08-27",
      "occurred_at": "2026-08-27 10:11:03.688946+00",
      "observed_since": "2026-08-26",
      "source": "scan",
      "summary": "Stability (unverified → fail)",
      "link": "https://verifymcp.io/servers/nexus-mcp-infra-useful-data-source-for-agents-doing-product-price-sdk/useful-data-source-for-agents-production#chg-chg_01a042b3-a1cb-7761-a651-dd61e10c2cf9"
    },
    {
      "id": "chg_01a042b3-a1cd-78eb-947e-0ec8b6b979cd",
      "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": "streamable-http"
      },
      "occurred_on": "2026-08-27",
      "occurred_at": "2026-08-27 10:11:03.688946+00",
      "observed_since": "2026-08-26",
      "source": "scan",
      "summary": "Transport (fail → pass)",
      "link": "https://verifymcp.io/servers/nexus-mcp-infra-useful-data-source-for-agents-doing-product-price-sdk/useful-data-source-for-agents-production#chg-chg_01a042b3-a1cd-78eb-947e-0ec8b6b979cd"
    },
    {
      "id": "chg_01a042b3-a1ce-70d6-97e4-f617933aa0d8",
      "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": "2026-08-27",
      "occurred_at": "2026-08-27 10:11:03.688946+00",
      "observed_since": "2026-08-26",
      "source": "scan",
      "summary": "Injection markers (unverified → pass)",
      "link": "https://verifymcp.io/servers/nexus-mcp-infra-useful-data-source-for-agents-doing-product-price-sdk/useful-data-source-for-agents-production#chg-chg_01a042b3-a1ce-70d6-97e4-f617933aa0d8"
    },
    {
      "id": "chg_01a042b3-a1ce-79d1-966b-86700b59a971",
      "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": "3",
        "judged": "3"
      },
      "occurred_on": "2026-08-27",
      "occurred_at": "2026-08-27 10:11:03.688946+00",
      "observed_since": "2026-08-26",
      "source": "scan",
      "summary": "First check of Judged manipulation (pass)",
      "link": "https://verifymcp.io/servers/nexus-mcp-infra-useful-data-source-for-agents-doing-product-price-sdk/useful-data-source-for-agents-production#chg-chg_01a042b3-a1ce-79d1-966b-86700b59a971"
    },
    {
      "id": "chg_01a042b3-a1cf-7ec0-b26c-3b8aa59e8f4d",
      "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": "3"
      },
      "occurred_on": "2026-08-27",
      "occurred_at": "2026-08-27 10:11:03.688946+00",
      "observed_since": "2026-08-26",
      "source": "scan",
      "summary": "Authorization (Authorisation not fully verified: no authorisation is required to call this server, and 3 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/nexus-mcp-infra-useful-data-source-for-agents-doing-product-price-sdk/useful-data-source-for-agents-production#chg-chg_01a042b3-a1cf-7ec0-b26c-3b8aa59e8f4d"
    },
    {
      "id": "chg_01a042b3-a1ed-7e96-af23-981dc793780a",
      "kind": "tool.removed",
      "family": "",
      "subject_kind": "tool",
      "subject": "nexus_useful_data_source_for_agents_doing_prod_fetch_buywhere_vendor_price_distribution",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "tool": "nexus_useful_data_source_for_agents_doing_prod_fetch_buywhere_vendor_price_distribution"
      },
      "occurred_on": "2026-08-27",
      "occurred_at": "2026-08-27 10:11:03.688946+00",
      "observed_since": "2026-08-04",
      "source": "scan",
      "summary": "Tool “nexus_useful_data_source_for_agents_doing_prod_fetch_buywhere_vendor_price_distribution” was removed",
      "link": "https://verifymcp.io/servers/nexus-mcp-infra-useful-data-source-for-agents-doing-product-price-sdk/useful-data-source-for-agents-production#chg-chg_01a042b3-a1ed-7e96-af23-981dc793780a"
    },
    {
      "id": "chg_01a042b3-a1ee-78f6-881a-5c970580fc7f",
      "kind": "tool.removed",
      "family": "",
      "subject_kind": "tool",
      "subject": "nexus_useful_data_source_for_agents_doing_prod_rank_buywhere_products_by_value_score",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": null,
      "to_value": null,
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "tool": "nexus_useful_data_source_for_agents_doing_prod_rank_buywhere_products_by_value_score"
      },
      "occurred_on": "2026-08-27",
      "occurred_at": "2026-08-27 10:11:03.688946+00",
      "observed_since": "2026-08-04",
      "source": "scan",
      "summary": "Tool “nexus_useful_data_source_for_agents_doing_prod_rank_buywhere_products_by_value_score” was removed",
      "link": "https://verifymcp.io/servers/nexus-mcp-infra-useful-data-source-for-agents-doing-product-price-sdk/useful-data-source-for-agents-production#chg-chg_01a042b3-a1ee-78f6-881a-5c970580fc7f"
    },
    {
      "id": "chg_01a042b3-a1f7-71a9-8827-9b552b3b82f9",
      "kind": "server.name_changed",
      "family": "",
      "subject_kind": "server",
      "subject": "mock-mcp-server",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": "nexus-useful-data-source-for-agents-doing-prod",
      "to_value": "mock-mcp-server",
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {
        "to": "mock-mcp-server",
        "from": "nexus-useful-data-source-for-agents-doing-prod"
      },
      "occurred_on": "2026-08-27",
      "occurred_at": "2026-08-27 10:11:03.688946+00",
      "observed_since": "2026-08-04",
      "source": "scan",
      "summary": "The server changed its declared name (nexus-useful-data-source-for-agents-doing-prod → mock-mcp-server)",
      "link": "https://verifymcp.io/servers/nexus-mcp-infra-useful-data-source-for-agents-doing-product-price-sdk/useful-data-source-for-agents-production#chg-chg_01a042b3-a1f7-71a9-8827-9b552b3b82f9"
    },
    {
      "id": "chg_019fd164-eb0a-79f9-931a-41044c75f77b",
      "kind": "check.unverifiable",
      "family": "stability",
      "subject_kind": "check",
      "subject": "stability",
      "subject_child": "",
      "from_code": "stability.building_history",
      "to_code": "stability.insufficient_history",
      "from_value": "0.30",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-08-05",
      "occurred_at": "2026-08-05 10:07:59.739529+00",
      "observed_since": "2026-08-04",
      "source": "scan",
      "summary": "Stability (0.30 → unverified)",
      "link": "https://verifymcp.io/servers/nexus-mcp-infra-useful-data-source-for-agents-doing-product-price-sdk/useful-data-source-for-agents-production#chg-chg_019fd164-eb0a-79f9-931a-41044c75f77b"
    },
    {
      "id": "chg_019fd164-eb0b-75cf-b945-206a79ede47b",
      "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": "404",
        "transport": "streamable-http"
      },
      "occurred_on": "2026-08-05",
      "occurred_at": "2026-08-05 10:07:59.739529+00",
      "observed_since": "2026-08-04",
      "source": "scan",
      "summary": "Transport (pass → fail)",
      "link": "https://verifymcp.io/servers/nexus-mcp-infra-useful-data-source-for-agents-doing-product-price-sdk/useful-data-source-for-agents-production#chg-chg_019fd164-eb0b-75cf-b945-206a79ede47b"
    },
    {
      "id": "chg_019fd164-eb0b-7ca4-889e-85235440afbd",
      "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": "2026-08-05",
      "occurred_at": "2026-08-05 10:07:59.739529+00",
      "observed_since": "2026-08-04",
      "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/nexus-mcp-infra-useful-data-source-for-agents-doing-product-price-sdk/useful-data-source-for-agents-production#chg-chg_019fd164-eb0b-7ca4-889e-85235440afbd"
    },
    {
      "id": "chg_019fd164-eb0d-71be-b471-8f2235857150",
      "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": "2026-08-05",
      "occurred_at": "2026-08-05 10:07:59.739529+00",
      "observed_since": "2026-08-04",
      "source": "scan",
      "summary": "Endpoint reachability (reachable → not serving MCP)",
      "link": "https://verifymcp.io/servers/nexus-mcp-infra-useful-data-source-for-agents-doing-product-price-sdk/useful-data-source-for-agents-production#chg-chg_019fd164-eb0d-71be-b471-8f2235857150"
    }
  ],
  "days": [
    {
      "date": "2026-09-10",
      "total": 23,
      "delta": -46,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 7
    },
    {
      "date": "2026-09-08",
      "total": 69,
      "delta": 1,
      "tracked": true,
      "explained": false,
      "beyond_event_horizon": false,
      "attribution": {
        "category": "Stability & Change Management",
        "from": 37,
        "to": 40,
        "delta": 3,
        "others": [],
        "accrual": {
          "code": "stability.building_history",
          "from_days": 11,
          "to_days": 12
        },
        "partial": false,
        "compared_to": "2026-09-07",
        "summary": "No change was recorded against any check on this day. Stability & Change Management went from 37 to 40. That category is still filling its 30-day observation window: 11 days of observed history at the previous scan, 12 at this one. The score rises as the window fills, whether or not the server changes."
      },
      "event_count": 0
    },
    {
      "date": "2026-09-06",
      "total": 68,
      "delta": 1,
      "tracked": true,
      "explained": false,
      "beyond_event_horizon": false,
      "attribution": {
        "category": "Stability & Change Management",
        "from": 30,
        "to": 33,
        "delta": 3,
        "others": [],
        "accrual": {
          "code": "stability.building_history",
          "from_days": 9,
          "to_days": 10
        },
        "partial": false,
        "compared_to": "2026-09-05",
        "summary": "No change was recorded against any check on this day. Stability & Change Management went from 30 to 33. That category is still filling its 30-day observation window: 9 days of observed history at the previous scan, 10 at this one. The score rises as the window fills, whether or not the server changes."
      },
      "event_count": 0
    },
    {
      "date": "2026-09-04",
      "total": 67,
      "delta": 4,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 1
    },
    {
      "date": "2026-08-27",
      "total": 63,
      "delta": 40,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 22
    },
    {
      "date": "2026-08-26",
      "total": 23,
      "delta": null,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 1
    },
    {
      "date": "2026-08-11",
      "total": 0,
      "delta": null,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 1
    },
    {
      "date": "2026-08-05",
      "total": 0,
      "delta": null,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 7
    }
  ]
}