{
  "$schema": "https://verifymcp.io/schemas/changelog.json",
  "server": "io-usefulapi-bird",
  "component": "bird",
  "generated_at": "2026-09-21T03:29:18.866Z",
  "tracking_since": "2026-07-26",
  "counts": {
    "critical": 0,
    "security": 52,
    "functional": 0,
    "cosmetic": 0
  },
  "events": [
    {
      "id": "chg_01a0ae72-0a74-7e38-a675-739a0f234d6f",
      "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": "2026-09-17",
      "occurred_at": "2026-09-17 08:18:24.10907+00",
      "observed_since": "2026-09-16",
      "source": "scan",
      "summary": "Authorization (unverified → pass)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_01a0ae72-0a74-7e38-a675-739a0f234d6f"
    },
    {
      "id": "chg_01a0ae72-0a77-71fb-aa54-ed7dc6e8001d",
      "kind": "check.reverified",
      "family": "tool-safety-injection",
      "subject_kind": "check",
      "subject": "tool-safety-injection",
      "subject_child": "",
      "from_code": "toolsafety.auth_gated",
      "to_code": "toolsafety.injection_clean",
      "from_value": "unverified",
      "to_value": "pass",
      "materiality": "security",
      "direction": "improvement",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-09-17",
      "occurred_at": "2026-09-17 08:18:24.10907+00",
      "observed_since": "2026-09-16",
      "source": "scan",
      "summary": "Injection markers (unverified → pass)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_01a0ae72-0a77-71fb-aa54-ed7dc6e8001d"
    },
    {
      "id": "chg_01a0ae72-0a77-78b0-9775-499afb3e3f08",
      "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": "2026-09-17",
      "occurred_at": "2026-09-17 08:18:24.10907+00",
      "observed_since": "2026-09-16",
      "source": "scan",
      "summary": "Stability (unverified → pass)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_01a0ae72-0a77-78b0-9775-499afb3e3f08"
    },
    {
      "id": "chg_01a0a94b-a3c8-75b3-a1ca-bbf42e287b24",
      "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": "2026-09-16",
      "occurred_at": "2026-09-16 08:18:21.489418+00",
      "observed_since": "2026-09-15",
      "source": "scan",
      "summary": "Transport (unverified → pass)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_01a0a94b-a3c8-75b3-a1ca-bbf42e287b24"
    },
    {
      "id": "chg_01a0a94b-a3cc-7ce8-ba37-506f36d73d87",
      "kind": "check.reason",
      "family": "tool-safety-injection",
      "subject_kind": "check",
      "subject": "tool-safety-injection",
      "subject_child": "",
      "from_code": "toolsafety.unreachable",
      "to_code": "toolsafety.auth_gated",
      "from_value": "unverified",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-09-16",
      "occurred_at": "2026-09-16 08:18:21.489418+00",
      "observed_since": "2026-09-15",
      "source": "scan",
      "summary": "Tool safety (Tool safety blocked by authentication: the endpoint requires auth we don't have to read its tools.)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_01a0a94b-a3cc-7ce8-ba37-506f36d73d87"
    },
    {
      "id": "chg_01a0a94b-a3d0-71b1-84a0-b100c785da61",
      "kind": "capture.status_changed",
      "family": "",
      "subject_kind": "server",
      "subject": "capture",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": "not_mcp",
      "to_value": "auth_gated",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "to": "auth_gated",
        "from": "not_mcp"
      },
      "occurred_on": "2026-09-16",
      "occurred_at": "2026-09-16 08:18:21.489418+00",
      "observed_since": "2026-09-15",
      "source": "scan",
      "summary": "Endpoint reachability (not serving MCP → behind authorisation)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_01a0a94b-a3d0-71b1-84a0-b100c785da61"
    },
    {
      "id": "chg_01a099d8-7b74-72c8-ad04-a5a7ad9e50a7",
      "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": "2026-09-13",
      "occurred_at": "2026-09-13 08:18:16.266389+00",
      "observed_since": "2026-09-12",
      "source": "scan",
      "summary": "Transport (pass → unverified)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_01a099d8-7b74-72c8-ad04-a5a7ad9e50a7"
    },
    {
      "id": "chg_01a099d8-7b75-7131-a2b0-244fe63580d8",
      "kind": "check.reason",
      "family": "tool-safety-injection",
      "subject_kind": "check",
      "subject": "tool-safety-injection",
      "subject_child": "",
      "from_code": "toolsafety.auth_gated",
      "to_code": "toolsafety.unreachable",
      "from_value": "unverified",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-09-13",
      "occurred_at": "2026-09-13 08:18:16.266389+00",
      "observed_since": "2026-09-12",
      "source": "scan",
      "summary": "Tool safety (Tool safety not yet verified: we couldn't read the endpoint's tools.)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_01a099d8-7b75-7131-a2b0-244fe63580d8"
    },
    {
      "id": "chg_01a099d8-7b77-76e3-b7f8-b58b7d0cb513",
      "kind": "capture.status_changed",
      "family": "",
      "subject_kind": "server",
      "subject": "capture",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": "auth_gated",
      "to_value": "not_mcp",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "to": "not_mcp",
        "from": "auth_gated"
      },
      "occurred_on": "2026-09-13",
      "occurred_at": "2026-09-13 08:18:16.266389+00",
      "observed_since": "2026-09-12",
      "source": "scan",
      "summary": "Endpoint reachability (behind authorisation → not serving MCP)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_01a099d8-7b77-76e3-b7f8-b58b7d0cb513"
    },
    {
      "id": "chg_01a094b1-7460-7c16-926d-7dadd5186edc",
      "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": "2026-09-12",
      "occurred_at": "2026-09-12 08:17:32.692528+00",
      "observed_since": "2026-09-11",
      "source": "scan",
      "summary": "Authorization (pass → unverified)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_01a094b1-7460-7c16-926d-7dadd5186edc"
    },
    {
      "id": "chg_01a094b1-7461-77ae-be51-46a49ea747ba",
      "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": "2026-09-12",
      "occurred_at": "2026-09-12 08:17:32.692528+00",
      "observed_since": "2026-09-11",
      "source": "scan",
      "summary": "Stability (pass → unverified)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_01a094b1-7461-77ae-be51-46a49ea747ba"
    },
    {
      "id": "chg_01a094b1-7461-7cb9-a038-11b4194683ed",
      "kind": "check.unverifiable",
      "family": "tool-safety-injection",
      "subject_kind": "check",
      "subject": "tool-safety-injection",
      "subject_child": "",
      "from_code": "toolsafety.injection_clean",
      "to_code": "toolsafety.auth_gated",
      "from_value": "pass",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-09-12",
      "occurred_at": "2026-09-12 08:17:32.692528+00",
      "observed_since": "2026-09-11",
      "source": "scan",
      "summary": "Tool safety (pass → unverified)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_01a094b1-7461-7cb9-a038-11b4194683ed"
    },
    {
      "id": "chg_01a094b1-7463-73d3-addd-b9c00fa6084b",
      "kind": "capture.status_changed",
      "family": "",
      "subject_kind": "server",
      "subject": "capture",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": "verified",
      "to_value": "auth_gated",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "to": "auth_gated",
        "from": "verified"
      },
      "occurred_on": "2026-09-12",
      "occurred_at": "2026-09-12 08:17:32.692528+00",
      "observed_since": "2026-09-11",
      "source": "scan",
      "summary": "Endpoint reachability (reachable → behind authorisation)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_01a094b1-7463-73d3-addd-b9c00fa6084b"
    },
    {
      "id": "chg_01a08f8d-f6f1-7833-b2be-1129374c0999",
      "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": "2026-09-11",
      "occurred_at": "2026-09-11 08:20:40.563396+00",
      "observed_since": "2026-09-10",
      "source": "scan",
      "summary": "Stability (0.97 → pass)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_01a08f8d-f6f1-7833-b2be-1129374c0999"
    },
    {
      "id": "chg_01a08a66-e267-7b4c-8bf5-06e7e683cffe",
      "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": "2026-09-10",
      "occurred_at": "2026-09-10 08:19:53.254888+00",
      "observed_since": "2026-09-09",
      "source": "scan",
      "summary": "Authorization (unverified → pass)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_01a08a66-e267-7b4c-8bf5-06e7e683cffe"
    },
    {
      "id": "chg_01a08a66-e269-7b74-932e-418396b7faa4",
      "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": "2026-09-10",
      "occurred_at": "2026-09-10 08:19:53.254888+00",
      "observed_since": "2026-09-09",
      "source": "scan",
      "summary": "Injection markers (unverified → pass)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_01a08a66-e269-7b74-932e-418396b7faa4"
    },
    {
      "id": "chg_01a08a66-e26a-74e5-a6bc-ad2d1deb13ce",
      "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": "16",
        "judged": "16"
      },
      "occurred_on": "2026-09-10",
      "occurred_at": "2026-09-10 08:19:53.254888+00",
      "observed_since": "2026-09-09",
      "source": "scan",
      "summary": "First check of Judged manipulation (pass)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_01a08a66-e26a-74e5-a6bc-ad2d1deb13ce"
    },
    {
      "id": "chg_01a0853e-bde1-7750-b067-45835fec36bb",
      "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": "28",
        "added": "0",
        "breaks": "0",
        "removed": "16",
        "auth_transport": "1"
      },
      "occurred_on": "2026-09-09",
      "occurred_at": "2026-09-09 08:17:56.637981+00",
      "observed_since": "2026-09-08",
      "source": "scan",
      "summary": "Stability (unverified → fail)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_01a0853e-bde1-7750-b067-45835fec36bb"
    },
    {
      "id": "chg_01a0853e-bde2-75d5-a569-a9dd179ca4c3",
      "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": "2026-09-09",
      "occurred_at": "2026-09-09 08:17:56.637981+00",
      "observed_since": "2026-09-08",
      "source": "scan",
      "summary": "Transport (unverified → pass)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_01a0853e-bde2-75d5-a569-a9dd179ca4c3"
    },
    {
      "id": "chg_01a051bc-6196-7bf4-9829-856657760c5e",
      "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": "2026-08-30",
      "occurred_at": "2026-08-30 08:14:55.180651+00",
      "observed_since": "2026-08-29",
      "source": "scan",
      "summary": "Transport (pass → unverified)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_01a051bc-6196-7bf4-9829-856657760c5e"
    },
    {
      "id": "chg_01a051bc-6197-7bab-a3ad-a4ac94f18543",
      "kind": "check.reason",
      "family": "tool-safety-injection",
      "subject_kind": "check",
      "subject": "tool-safety-injection",
      "subject_child": "",
      "from_code": "toolsafety.auth_gated",
      "to_code": "toolsafety.unreachable",
      "from_value": "unverified",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-08-30",
      "occurred_at": "2026-08-30 08:14:55.180651+00",
      "observed_since": "2026-08-29",
      "source": "scan",
      "summary": "Tool safety (Tool safety not yet verified: we couldn't read the endpoint's tools.)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_01a051bc-6197-7bab-a3ad-a4ac94f18543"
    },
    {
      "id": "chg_01a051bc-619a-72ab-9ab0-b8e9e7e39eb2",
      "kind": "capture.status_changed",
      "family": "",
      "subject_kind": "server",
      "subject": "capture",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": "auth_gated",
      "to_value": "not_mcp",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "to": "not_mcp",
        "from": "auth_gated"
      },
      "occurred_on": "2026-08-30",
      "occurred_at": "2026-08-30 08:14:55.180651+00",
      "observed_since": "2026-08-29",
      "source": "scan",
      "summary": "Endpoint reachability (behind authorisation → not serving MCP)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_01a051bc-619a-72ab-9ab0-b8e9e7e39eb2"
    },
    {
      "id": "chg_01a04c96-c4dc-79f4-b0ef-c7c69f4665c6",
      "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": "2026-08-29",
      "occurred_at": "2026-08-29 08:15:44.258944+00",
      "observed_since": "2026-08-28",
      "source": "scan",
      "summary": "Transport (unverified → pass)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_01a04c96-c4dc-79f4-b0ef-c7c69f4665c6"
    },
    {
      "id": "chg_01a04c96-c4de-77b8-9457-993d53d6671f",
      "kind": "check.reason",
      "family": "tool-safety-injection",
      "subject_kind": "check",
      "subject": "tool-safety-injection",
      "subject_child": "",
      "from_code": "toolsafety.unreachable",
      "to_code": "toolsafety.auth_gated",
      "from_value": "unverified",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "neutral",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-08-29",
      "occurred_at": "2026-08-29 08:15:44.258944+00",
      "observed_since": "2026-08-28",
      "source": "scan",
      "summary": "Tool safety (Tool safety blocked by authentication: the endpoint requires auth we don't have to read its tools.)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_01a04c96-c4de-77b8-9457-993d53d6671f"
    },
    {
      "id": "chg_01a04c96-c4df-7a64-b725-75ee58dc12cd",
      "kind": "capture.status_changed",
      "family": "",
      "subject_kind": "server",
      "subject": "capture",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": "not_mcp",
      "to_value": "auth_gated",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "to": "auth_gated",
        "from": "not_mcp"
      },
      "occurred_on": "2026-08-29",
      "occurred_at": "2026-08-29 08:15:44.258944+00",
      "observed_since": "2026-08-28",
      "source": "scan",
      "summary": "Endpoint reachability (not serving MCP → behind authorisation)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_01a04c96-c4df-7a64-b725-75ee58dc12cd"
    },
    {
      "id": "chg_01a01917-1409-7ab3-b3a0-d0f51e85e21a",
      "kind": "check.unverifiable",
      "family": "stability",
      "subject_kind": "check",
      "subject": "stability",
      "subject_child": "",
      "from_code": "stability.churn",
      "to_code": "stability.insufficient_history",
      "from_value": "fail",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-08-19",
      "occurred_at": "2026-08-19 08:15:37.860348+00",
      "observed_since": "2026-08-18",
      "source": "scan",
      "summary": "Stability (fail → unverified)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_01a01917-1409-7ab3-b3a0-d0f51e85e21a"
    },
    {
      "id": "chg_01a01917-140a-7a46-966a-981ce4f53e62",
      "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": "2026-08-19",
      "occurred_at": "2026-08-19 08:15:37.860348+00",
      "observed_since": "2026-08-18",
      "source": "scan",
      "summary": "Transport (pass → unverified)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_01a01917-140a-7a46-966a-981ce4f53e62"
    },
    {
      "id": "chg_01a01917-140b-75d4-ab1c-263daeb8b7f8",
      "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": "2026-08-19",
      "occurred_at": "2026-08-19 08:15:37.860348+00",
      "observed_since": "2026-08-18",
      "source": "scan",
      "summary": "Endpoint reachability (reachable → not serving MCP)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_01a01917-140b-75d4-ab1c-263daeb8b7f8"
    },
    {
      "id": "chg_01a013f0-4aad-74fd-a3de-fc814cd6150e",
      "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": "22",
        "added": "0",
        "breaks": "0",
        "removed": "16",
        "auth_transport": "1"
      },
      "occurred_on": "2026-08-18",
      "occurred_at": "2026-08-18 08:15:09.929211+00",
      "observed_since": "2026-08-17",
      "source": "scan",
      "summary": "Stability (unverified → fail)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_01a013f0-4aad-74fd-a3de-fc814cd6150e"
    },
    {
      "id": "chg_01a013f0-4aae-7249-9c1b-a3812d29cba1",
      "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": "2026-08-18",
      "occurred_at": "2026-08-18 08:15:09.929211+00",
      "observed_since": "2026-08-17",
      "source": "scan",
      "summary": "Transport (unverified → pass)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_01a013f0-4aae-7249-9c1b-a3812d29cba1"
    },
    {
      "id": "chg_01a00eca-38ca-7ce7-9d6f-19a4e0773bd9",
      "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": "2026-08-17",
      "occurred_at": "2026-08-17 08:15:28.840774+00",
      "observed_since": "2026-08-16",
      "source": "scan",
      "summary": "Transport (pass → unverified)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_01a00eca-38ca-7ce7-9d6f-19a4e0773bd9"
    },
    {
      "id": "chg_01a00eca-38cd-71cc-99a4-ae8a34e68ed6",
      "kind": "capture.status_changed",
      "family": "",
      "subject_kind": "server",
      "subject": "capture",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": "auth_gated",
      "to_value": "not_mcp",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "to": "not_mcp",
        "from": "auth_gated"
      },
      "occurred_on": "2026-08-17",
      "occurred_at": "2026-08-17 08:15:28.840774+00",
      "observed_since": "2026-08-16",
      "source": "scan",
      "summary": "Endpoint reachability (behind authorisation → not serving MCP)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_01a00eca-38cd-71cc-99a4-ae8a34e68ed6"
    },
    {
      "id": "chg_01a009a3-8c50-74d2-8eab-62a28890b5b2",
      "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 08:15:08.086728+00",
      "observed_since": "2026-08-15",
      "source": "scan",
      "summary": "Transport (unverified → pass)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_01a009a3-8c50-74d2-8eab-62a28890b5b2"
    },
    {
      "id": "chg_01a009a3-8c53-7f17-badf-922d02cbae04",
      "kind": "capture.status_changed",
      "family": "",
      "subject_kind": "server",
      "subject": "capture",
      "subject_child": "",
      "from_code": null,
      "to_code": null,
      "from_value": "not_mcp",
      "to_value": "auth_gated",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {
        "to": "auth_gated",
        "from": "not_mcp"
      },
      "occurred_on": "2026-08-16",
      "occurred_at": "2026-08-16 08:15:08.086728+00",
      "observed_since": "2026-08-15",
      "source": "scan",
      "summary": "Endpoint reachability (not serving MCP → behind authorisation)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_01a009a3-8c53-7f17-badf-922d02cbae04"
    },
    {
      "id": "chg_019fff56-85b3-78f6-a342-cc882c43a4f1",
      "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": "2026-08-14",
      "occurred_at": "2026-08-14 08:14:48.107965+00",
      "observed_since": "2026-08-13",
      "source": "scan",
      "summary": "Transport (fail → unverified)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_019fff56-85b3-78f6-a342-cc882c43a4f1"
    },
    {
      "id": "chg_019ffa30-12f3-7e01-b9a4-05443fafabdf",
      "kind": "check.unverifiable",
      "family": "stability",
      "subject_kind": "check",
      "subject": "stability",
      "subject_child": "",
      "from_code": "stability.building_history",
      "to_code": "stability.insufficient_history",
      "from_value": "0.53",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-08-13",
      "occurred_at": "2026-08-13 08:14:42.407751+00",
      "observed_since": "2026-08-12",
      "source": "scan",
      "summary": "Stability (0.53 → unverified)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_019ffa30-12f3-7e01-b9a4-05443fafabdf"
    },
    {
      "id": "chg_019ffa30-12f4-7a6c-b851-7324f1bf2e35",
      "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": "2026-08-13",
      "occurred_at": "2026-08-13 08:14:42.407751+00",
      "observed_since": "2026-08-12",
      "source": "scan",
      "summary": "Authorization (pass → unverified)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_019ffa30-12f4-7a6c-b851-7324f1bf2e35"
    },
    {
      "id": "chg_019ffa30-12f5-700c-9d3e-b8c430290aa6",
      "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": "2026-08-13",
      "occurred_at": "2026-08-13 08:14:42.407751+00",
      "observed_since": "2026-08-12",
      "source": "scan",
      "summary": "Transport (pass → fail)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_019ffa30-12f5-700c-9d3e-b8c430290aa6"
    },
    {
      "id": "chg_019ffa30-12f5-7c6b-8013-3f49d7be107c",
      "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": "2026-08-13",
      "occurred_at": "2026-08-13 08:14:42.407751+00",
      "observed_since": "2026-08-12",
      "source": "scan",
      "summary": "Endpoint reachability (reachable → not serving MCP)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_019ffa30-12f5-7c6b-8013-3f49d7be107c"
    },
    {
      "id": "chg_019ff509-9559-77a9-8e5f-2690a2c0aaaa",
      "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": "2026-08-12",
      "occurred_at": "2026-08-12 08:14:33.799168+00",
      "observed_since": "2026-08-11",
      "source": "scan",
      "summary": "Transport (unverified → pass)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_019ff509-9559-77a9-8e5f-2690a2c0aaaa"
    },
    {
      "id": "chg_019ff509-955a-773a-bddd-71c96f8687d4",
      "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": "2026-08-12",
      "occurred_at": "2026-08-12 08:14:33.799168+00",
      "observed_since": "2026-08-11",
      "source": "scan",
      "summary": "Authorization (unverified → pass)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_019ff509-955a-773a-bddd-71c96f8687d4"
    },
    {
      "id": "chg_019fdb49-c718-71f9-b5e6-d1bb3b12d2bd",
      "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": "2026-08-07",
      "occurred_at": "2026-08-07 08:14:33.225362+00",
      "observed_since": "2026-08-06",
      "source": "scan",
      "summary": "Transport (pass → unverified)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_019fdb49-c718-71f9-b5e6-d1bb3b12d2bd"
    },
    {
      "id": "chg_019fc6af-469c-7035-8ae2-d11b63a6bcd3",
      "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": "2026-08-03",
      "occurred_at": "2026-08-03 08:13:23.448612+00",
      "observed_since": "2026-08-02",
      "source": "scan",
      "summary": "Authorization (pass → unverified)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_019fc6af-469c-7035-8ae2-d11b63a6bcd3"
    },
    {
      "id": "chg_019fc6af-469c-7f3e-b75e-0ac10c58bc2d",
      "kind": "check.unverifiable",
      "family": "stability",
      "subject_kind": "check",
      "subject": "stability",
      "subject_child": "",
      "from_code": "stability.building_history",
      "to_code": "stability.insufficient_history",
      "from_value": "0.20",
      "to_value": "unverified",
      "materiality": "security",
      "direction": "regression",
      "score_delta": null,
      "detail": {},
      "occurred_on": "2026-08-03",
      "occurred_at": "2026-08-03 08:13:23.448612+00",
      "observed_since": "2026-08-02",
      "source": "scan",
      "summary": "Stability (0.20 → unverified)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_019fc6af-469c-7f3e-b75e-0ac10c58bc2d"
    },
    {
      "id": "chg_019fc6af-469d-7eb5-8ae3-8c05661016ae",
      "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": "2026-08-03",
      "occurred_at": "2026-08-03 08:13:23.448612+00",
      "observed_since": "2026-08-02",
      "source": "scan",
      "summary": "Endpoint reachability (reachable → not serving MCP)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_019fc6af-469d-7eb5-8ae3-8c05661016ae"
    },
    {
      "id": "chg_019fc492-2ce5-71c4-8ed7-bb85eda61951",
      "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": "2026-08-02",
      "occurred_at": "2026-08-02 22:22:21.901463+00",
      "observed_since": "2026-08-01",
      "source": "scan",
      "summary": "Authorization (unverified → pass)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_019fc492-2ce5-71c4-8ed7-bb85eda61951"
    },
    {
      "id": "chg_019fc492-2ce6-75dd-a10f-2dc1e4c76eac",
      "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 22:22:21.901463+00",
      "observed_since": "2026-08-01",
      "source": "scan",
      "summary": "Transport (fail → pass)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_019fc492-2ce6-75dd-a10f-2dc1e4c76eac"
    },
    {
      "id": "chg_019fbc60-6e4c-75bb-a2b9-e05e064e32b0",
      "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 08:11:04.127756+00",
      "observed_since": "2026-07-31",
      "source": "scan",
      "summary": "Stability (0.13 → unverified)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_019fbc60-6e4c-75bb-a2b9-e05e064e32b0"
    },
    {
      "id": "chg_019fbc60-6e4c-7d3b-917d-b3bdc790df0b",
      "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 08:11:04.127756+00",
      "observed_since": "2026-07-31",
      "source": "scan",
      "summary": "Authorization (pass → unverified)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_019fbc60-6e4c-7d3b-917d-b3bdc790df0b"
    },
    {
      "id": "chg_019fbc60-6e4d-73a3-8e84-f5d2a33d449e",
      "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 08:11:04.127756+00",
      "observed_since": "2026-07-31",
      "source": "scan",
      "summary": "Transport (pass → fail)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_019fbc60-6e4d-73a3-8e84-f5d2a33d449e"
    },
    {
      "id": "chg_019fbc60-6e4e-78a8-a2c6-b5e49fec52b8",
      "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 08:11:04.127756+00",
      "observed_since": "2026-07-31",
      "source": "scan",
      "summary": "Endpoint reachability (reachable → not serving MCP)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_019fbc60-6e4e-78a8-a2c6-b5e49fec52b8"
    },
    {
      "id": "chg_019faf95-25b3-7ecd-907c-49035b720ebc",
      "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": "2026-07-29",
      "occurred_at": "2026-07-29 20:33:35.138327+00",
      "observed_since": "2026-07-28",
      "source": "scan",
      "summary": "Authorization (pass → fail)",
      "link": "https://verifymcp.io/servers/io-usefulapi-bird/bird#chg-chg_019faf95-25b3-7ecd-907c-49035b720ebc"
    }
  ],
  "days": [
    {
      "date": "2026-09-19",
      "total": 76,
      "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": "2026-09-18",
        "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": "2026-09-18",
      "total": 75,
      "delta": -10,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 1
    },
    {
      "date": "2026-09-17",
      "total": 85,
      "delta": 57,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 6
    },
    {
      "date": "2026-09-16",
      "total": 28,
      "delta": 10,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 6
    },
    {
      "date": "2026-09-13",
      "total": 18,
      "delta": -10,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 6
    },
    {
      "date": "2026-09-12",
      "total": 28,
      "delta": -58,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 7
    },
    {
      "date": "2026-09-11",
      "total": 86,
      "delta": 1,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 1
    },
    {
      "date": "2026-09-10",
      "total": 85,
      "delta": 54,
      "tracked": true,
      "explained": true,
      "beyond_event_horizon": false,
      "attribution": null,
      "event_count": 10
    }
  ]
}