{
  "$schema": "https://verifymcp.io/schemas/changelog.json",
  "server": "io-usefulapi-sendgrid",
  "component": "sendgrid",
  "generated_at": "2026-09-20T20:21:05.644Z",
  "tracking_since": "2026-07-26",
  "counts": {
    "critical": 0,
    "security": 24,
    "functional": 0,
    "cosmetic": 0
  },
  "events": [
    {
      "id": "chg_01a0bd78-e8a0-749b-9968-6db330a6d38d",
      "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": "2026-09-20",
      "occurred_at": "2026-09-20 06:20:12.663553+00",
      "observed_since": "2026-09-19",
      "source": "scan",
      "summary": "Transport (pass → fail)",
      "link": "https://verifymcp.io/servers/io-usefulapi-sendgrid/sendgrid#chg-chg_01a0bd78-e8a0-749b-9968-6db330a6d38d"
    },
    {
      "id": "chg_01a0b852-f93a-7210-8e5f-9e3d26e0810e",
      "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": "2026-09-19",
      "occurred_at": "2026-09-19 06:20:40.522464+00",
      "observed_since": "2026-09-18",
      "source": "scan",
      "summary": "Transport (unverified → pass)",
      "link": "https://verifymcp.io/servers/io-usefulapi-sendgrid/sendgrid#chg-chg_01a0b852-f93a-7210-8e5f-9e3d26e0810e"
    },
    {
      "id": "chg_01a06b0f-8ed5-7822-9060-3f4675054d55",
      "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": "2026-09-04",
      "occurred_at": "2026-09-04 06:16:16.727894+00",
      "observed_since": "2026-09-03",
      "source": "scan",
      "summary": "Stability (pass → unverified)",
      "link": "https://verifymcp.io/servers/io-usefulapi-sendgrid/sendgrid#chg-chg_01a06b0f-8ed5-7822-9060-3f4675054d55"
    },
    {
      "id": "chg_01a06b0f-8ed6-7a31-b84b-d84867dc4c0e",
      "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": "2026-09-04",
      "occurred_at": "2026-09-04 06:16:16.727894+00",
      "observed_since": "2026-09-03",
      "source": "scan",
      "summary": "Tool safety (pass → unverified)",
      "link": "https://verifymcp.io/servers/io-usefulapi-sendgrid/sendgrid#chg-chg_01a06b0f-8ed6-7a31-b84b-d84867dc4c0e"
    },
    {
      "id": "chg_01a06b0f-8ed6-7ec9-a19c-630cf6d34d3f",
      "kind": "check.unverifiable",
      "family": "transport",
      "subject_kind": "check",
      "subject": "transport",
      "subject_child": "",
      "from_code": "transport.verified",
      "to_code": "transport.auth_gated",
      "from_value": "pass",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "transport": "streamable-http"
      },
      "occurred_on": "2026-09-04",
      "occurred_at": "2026-09-04 06:16:16.727894+00",
      "observed_since": "2026-09-03",
      "source": "scan",
      "summary": "Transport (pass → unverified)",
      "link": "https://verifymcp.io/servers/io-usefulapi-sendgrid/sendgrid#chg-chg_01a06b0f-8ed6-7ec9-a19c-630cf6d34d3f"
    },
    {
      "id": "chg_01a06b0f-8ed7-7563-8474-d108929e832a",
      "kind": "check.unverifiable",
      "family": "auth-oauth",
      "subject_kind": "check",
      "subject": "auth-oauth",
      "subject_child": "",
      "from_code": "auth.challenge_only_invoke",
      "to_code": "auth.none_unlisted",
      "from_value": "fail",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-09-04",
      "occurred_at": "2026-09-04 06:16:16.727894+00",
      "observed_since": "2026-09-03",
      "source": "scan",
      "summary": "Authorization (fail → unverified)",
      "link": "https://verifymcp.io/servers/io-usefulapi-sendgrid/sendgrid#chg-chg_01a06b0f-8ed7-7563-8474-d108929e832a"
    },
    {
      "id": "chg_01a06b0f-8ed9-7630-bad4-d8ed852c2441",
      "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": "2026-09-04",
      "occurred_at": "2026-09-04 06:16:16.727894+00",
      "observed_since": "2026-09-03",
      "source": "scan",
      "summary": "Endpoint reachability (reachable → not serving MCP)",
      "link": "https://verifymcp.io/servers/io-usefulapi-sendgrid/sendgrid#chg-chg_01a06b0f-8ed9-7630-bad4-d8ed852c2441"
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    {
      "id": "chg_01a065e9-30f7-7161-8a43-136db53c7cdd",
      "kind": "check.verdict",
      "family": "auth-oauth",
      "subject_kind": "check",
      "subject": "auth-oauth",
      "subject_child": "",
      "from_code": "auth.rfc9728_invoke",
      "to_code": "auth.challenge_only_invoke",
      "from_value": "pass",
      "to_value": "fail",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-09-03",
      "occurred_at": "2026-09-03 06:16:16.223667+00",
      "observed_since": "2026-09-02",
      "source": "scan",
      "summary": "Authorization (pass → fail)",
      "link": "https://verifymcp.io/servers/io-usefulapi-sendgrid/sendgrid#chg-chg_01a065e9-30f7-7161-8a43-136db53c7cdd"
    },
    {
      "id": "chg_01a060c2-54d1-754a-9b7a-6a7c3d8985a7",
      "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": "2026-09-02",
      "occurred_at": "2026-09-02 06:15:43.418627+00",
      "observed_since": "2026-09-01",
      "source": "scan",
      "summary": "Stability (0.97 → pass)",
      "link": "https://verifymcp.io/servers/io-usefulapi-sendgrid/sendgrid#chg-chg_01a060c2-54d1-754a-9b7a-6a7c3d8985a7"
    },
    {
      "id": "chg_01a00934-81c9-7161-b096-4e95e70177ec",
      "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": "2026-08-16",
      "occurred_at": "2026-08-16 06:13:51.035393+00",
      "observed_since": "2026-08-15",
      "source": "scan",
      "summary": "Transport (unverified → pass)",
      "link": "https://verifymcp.io/servers/io-usefulapi-sendgrid/sendgrid#chg-chg_01a00934-81c9-7161-b096-4e95e70177ec"
    },
    {
      "id": "chg_01a00934-81ca-70c3-ab55-25de5ad67851",
      "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": "2026-08-16",
      "occurred_at": "2026-08-16 06:13:51.035393+00",
      "observed_since": "2026-08-15",
      "source": "scan",
      "summary": "Authorization (unverified → pass)",
      "link": "https://verifymcp.io/servers/io-usefulapi-sendgrid/sendgrid#chg-chg_01a00934-81ca-70c3-ab55-25de5ad67851"
    },
    {
      "id": "chg_01a0040c-b97d-7eaf-8aa0-9ec88f5e39c4",
      "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": "2026-08-15",
      "occurred_at": "2026-08-15 06:12:17.905478+00",
      "observed_since": "2026-08-14",
      "source": "scan",
      "summary": "Transport (fail → unverified)",
      "link": "https://verifymcp.io/servers/io-usefulapi-sendgrid/sendgrid#chg-chg_01a0040c-b97d-7eaf-8aa0-9ec88f5e39c4"
    },
    {
      "id": "chg_019ff49a-b4db-7a69-a0a2-e0f993d7d5ce",
      "kind": "check.unverifiable",
      "family": "auth-oauth",
      "subject_kind": "check",
      "subject": "auth-oauth",
      "subject_child": "",
      "from_code": "auth.rfc9728_invoke",
      "to_code": "auth.none_unlisted",
      "from_value": "pass",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-08-12",
      "occurred_at": "2026-08-12 06:13:27.372966+00",
      "observed_since": "2026-08-11",
      "source": "scan",
      "summary": "Authorization (pass → unverified)",
      "link": "https://verifymcp.io/servers/io-usefulapi-sendgrid/sendgrid#chg-chg_019ff49a-b4db-7a69-a0a2-e0f993d7d5ce"
    },
    {
      "id": "chg_019ff49a-b4dc-797d-b987-4b8ab568b774",
      "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": "2026-08-12",
      "occurred_at": "2026-08-12 06:13:27.372966+00",
      "observed_since": "2026-08-11",
      "source": "scan",
      "summary": "Transport (pass → fail)",
      "link": "https://verifymcp.io/servers/io-usefulapi-sendgrid/sendgrid#chg-chg_019ff49a-b4dc-797d-b987-4b8ab568b774"
    },
    {
      "id": "chg_019ff49a-b4dd-75c4-be3d-4c40c9f47ad6",
      "kind": "check.unverifiable",
      "family": "stability",
      "subject_kind": "check",
      "subject": "stability",
      "subject_child": "",
      "from_code": "stability.building_history",
      "to_code": "stability.insufficient_history",
      "from_value": "0.50",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-08-12",
      "occurred_at": "2026-08-12 06:13:27.372966+00",
      "observed_since": "2026-08-11",
      "source": "scan",
      "summary": "Stability (0.50 → unverified)",
      "link": "https://verifymcp.io/servers/io-usefulapi-sendgrid/sendgrid#chg-chg_019ff49a-b4dd-75c4-be3d-4c40c9f47ad6"
    },
    {
      "id": "chg_019ff49a-b4de-75ce-91e5-9d1e49f9fe9c",
      "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": "2026-08-12",
      "occurred_at": "2026-08-12 06:13:27.372966+00",
      "observed_since": "2026-08-11",
      "source": "scan",
      "summary": "Endpoint reachability (reachable → not serving MCP)",
      "link": "https://verifymcp.io/servers/io-usefulapi-sendgrid/sendgrid#chg-chg_019ff49a-b4de-75ce-91e5-9d1e49f9fe9c"
    },
    {
      "id": "chg_019fe525-c1f4-79c8-9723-64456ce88073",
      "kind": "check.verdict",
      "family": "auth-oauth",
      "subject_kind": "check",
      "subject": "auth-oauth",
      "subject_child": "",
      "from_code": "auth.challenge_only_invoke",
      "to_code": "auth.rfc9728_invoke",
      "from_value": "fail",
      "to_value": "pass",
      "materiality": "security",
      "direction": "improvement",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-08-09",
      "occurred_at": "2026-08-09 06:11:24.71786+00",
      "observed_since": "2026-08-08",
      "source": "scan",
      "summary": "Authorization (fail → pass)",
      "link": "https://verifymcp.io/servers/io-usefulapi-sendgrid/sendgrid#chg-chg_019fe525-c1f4-79c8-9723-64456ce88073"
    },
    {
      "id": "chg_019fe000-4286-7676-a06a-a5c1a72f4aab",
      "kind": "check.verdict",
      "family": "auth-oauth",
      "subject_kind": "check",
      "subject": "auth-oauth",
      "subject_child": "",
      "from_code": "auth.rfc9728_invoke",
      "to_code": "auth.challenge_only_invoke",
      "from_value": "pass",
      "to_value": "fail",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-08-08",
      "occurred_at": "2026-08-08 06:12:21.162522+00",
      "observed_since": "2026-08-07",
      "source": "scan",
      "summary": "Authorization (pass → fail)",
      "link": "https://verifymcp.io/servers/io-usefulapi-sendgrid/sendgrid#chg-chg_019fe000-4286-7676-a06a-a5c1a72f4aab"
    },
    {
      "id": "chg_019fc643-a5f3-7e9c-a120-c0e21c3fe9f3",
      "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": "2026-08-03",
      "occurred_at": "2026-08-03 06:15:49.987354+00",
      "observed_since": "2026-08-02",
      "source": "scan",
      "summary": "Authorization (unverified → pass)",
      "link": "https://verifymcp.io/servers/io-usefulapi-sendgrid/sendgrid#chg-chg_019fc643-a5f3-7e9c-a120-c0e21c3fe9f3"
    },
    {
      "id": "chg_019fc4ad-01ba-7616-a7f6-43d96b3447f4",
      "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": "2026-08-02",
      "occurred_at": "2026-08-02 22:51:40.186091+00",
      "observed_since": "2026-08-01",
      "source": "scan",
      "summary": "Transport (fail → pass)",
      "link": "https://verifymcp.io/servers/io-usefulapi-sendgrid/sendgrid#chg-chg_019fc4ad-01ba-7616-a7f6-43d96b3447f4"
    },
    {
      "id": "chg_019fbbed-e77c-7eca-ba72-463b3c7fc72d",
      "kind": "check.unverifiable",
      "family": "stability",
      "subject_kind": "check",
      "subject": "stability",
      "subject_child": "",
      "from_code": "stability.building_history",
      "to_code": "stability.insufficient_history",
      "from_value": "0.13",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-08-01",
      "occurred_at": "2026-08-01 06:05:58.514359+00",
      "observed_since": "2026-07-31",
      "source": "scan",
      "summary": "Stability (0.13 → unverified)",
      "link": "https://verifymcp.io/servers/io-usefulapi-sendgrid/sendgrid#chg-chg_019fbbed-e77c-7eca-ba72-463b3c7fc72d"
    },
    {
      "id": "chg_019fbbed-e77d-7926-b21c-6be884d2aba4",
      "kind": "check.unverifiable",
      "family": "auth-oauth",
      "subject_kind": "check",
      "subject": "auth-oauth",
      "subject_child": "",
      "from_code": "auth.rfc9728_invoke",
      "to_code": "auth.none_unlisted",
      "from_value": "pass",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-08-01",
      "occurred_at": "2026-08-01 06:05:58.514359+00",
      "observed_since": "2026-07-31",
      "source": "scan",
      "summary": "Authorization (pass → unverified)",
      "link": "https://verifymcp.io/servers/io-usefulapi-sendgrid/sendgrid#chg-chg_019fbbed-e77d-7926-b21c-6be884d2aba4"
    },
    {
      "id": "chg_019fbbed-e77d-7e80-9233-b05b4f7db979",
      "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": "2026-08-01",
      "occurred_at": "2026-08-01 06:05:58.514359+00",
      "observed_since": "2026-07-31",
      "source": "scan",
      "summary": "Transport (pass → fail)",
      "link": "https://verifymcp.io/servers/io-usefulapi-sendgrid/sendgrid#chg-chg_019fbbed-e77d-7e80-9233-b05b4f7db979"
    },
    {
      "id": "chg_019fbbed-e77e-7d2f-b5ba-6b8831aee071",
      "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": "2026-08-01",
      "occurred_at": "2026-08-01 06:05:58.514359+00",
      "observed_since": "2026-07-31",
      "source": "scan",
      "summary": "Endpoint reachability (reachable → not serving MCP)",
      "link": "https://verifymcp.io/servers/io-usefulapi-sendgrid/sendgrid#chg-chg_019fbbed-e77e-7d2f-b5ba-6b8831aee071"
    }
  ],
  "days": [
    {
      "date": "2026-09-20",
      "total": 18,
      "delta": -10,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 1
    },
    {
      "date": "2026-09-19",
      "total": 28,
      "delta": 10,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 1
    },
    {
      "date": "2026-09-04",
      "total": 18,
      "delta": -65,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 7
    },
    {
      "date": "2026-09-03",
      "total": 83,
      "delta": -3,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 1
    },
    {
      "date": "2026-09-02",
      "total": 86,
      "delta": 0,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 1
    },
    {
      "date": "2026-09-01",
      "total": 86,
      "delta": 1,
      "tracked": true,
      "explained": false,
      "beyond_event_horizon": false,
      "attribution": {
        "category": "Stability & Change Management",
        "from": 93,
        "to": 97,
        "delta": 4,
        "others": [],
        "accrual": {
          "code": "stability.building_history",
          "from_days": 28,
          "to_days": 29
        },
        "partial": false,
        "compared_to": "2026-08-31",
        "summary": "No change was recorded against any check on this day. Stability & Change Management went from 93 to 97. That category is still filling its 30-day observation window: 28 days of observed history at the previous scan, 29 at this one. The score rises as the window fills, whether or not the server changes."
      },
      "event_count": 0
    },
    {
      "date": "2026-08-31",
      "total": 85,
      "delta": -1,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 1
    },
    {
      "date": "2026-08-26",
      "total": 86,
      "delta": 1,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 1
    }
  ]
}