Postproxy — the complete, unedited output of the deterministic mcptrustchecker engine v1.13.0, scanned . Every finding, capability tag and score component below is exactly what the engine produced — no AI, no post-processing.
{
"tool": {
"name": "mcptrustchecker",
"version": "1.13.0",
"methodologyVersion": "mcptrustchecker-1.13"
},
"target": {
"id": "postproxy-mcp",
"source": {
"kind": "package",
"origin": "postproxy-mcp"
},
"server": {
"name": "postproxy-mcp"
}
},
"grade": "A",
"score": {
"score": 99,
"threatScore": 100,
"grade": "A",
"band": "A",
"categorySubtotals": {
"injection": 0,
"exfiltration": 0,
"permissions": 0,
"supply-chain": 0,
"network": 0,
"hygiene": 0
},
"vector": [
{
"kind": "client",
"term": "capability-exposure",
"level": "minimal",
"label": "capability blast radius (minimal) — client exposure if the model is manipulated",
"appliedPenalty": 0
},
{
"kind": "client",
"term": "verification-discount",
"level": "repo",
"label": "publisher verification (public source) — no provenance, but the source is public and inspectable",
"appliedPenalty": 1
},
{
"kind": "client",
"term": "coverage-honesty",
"level": "source",
"label": "inspection depth (source) — how much of the target the scan could see",
"appliedPenalty": 0
}
],
"gatesFired": [],
"methodologyVersion": "mcptrustchecker-1.13"
},
"capability": {
"level": "minimal",
"reasons": [],
"tags": []
},
"coverage": {
"level": "source",
"inputs": {
"toolSurface": true,
"implementationSource": true,
"packageMetadata": true,
"liveTransport": false
},
"caveats": [
"Tools were statically extracted from the published source (64 recovered), not enumerated from a running server. Tool-poisoning, Unicode-smuggling, capability and toxic-flow analysis ran on this inferred surface, but a mis-parsed registration could be missed or mis-attributed, so tool-derived findings are capped below “confirmed”. To grade the real runtime surface, scan the running server: --command \"npx -y <package>\"."
]
},
"findings": [
{
"ruleId": "MTC-SRC-003",
"title": "Hardcoded egress to an external endpoint in packaging/dev tooling (test/worker-auth.test.mjs)",
"category": "exfiltration",
"severity": "low",
"confidence": "heuristic",
"description": "In a packaging/dev/install script (shipped, but not the server runtime) (`test/worker-auth.test.mjs:22`): A hardcoded outbound call to a fixed external host inside server code is a classic exfiltration/telemetry channel — especially paired with reads of local data. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.",
"remediation": "Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.",
"location": {
"kind": "server",
"name": "test/worker-auth.test.mjs"
},
"evidence": "aders = {}) => worker.fetch('https://mcp.postproxy.dev/mcp', { method: 'POST', headers: { 'Content-Type': 'app",
"owasp": "LLM02:2025 Sensitive Information Disclosure",
"data": {
"rule": "MTC-SRC-003",
"file": "test/worker-auth.test.mjs",
"line": 22,
"nonRuntime": true
}
}
],
"toxicFlows": [],
"capabilities": [
{
"tool": "auth_status",
"tags": [],
"reasons": {}
},
{
"tool": "summary_get",
"tags": [],
"reasons": {}
},
{
"tool": "profile_groups_list",
"tags": [],
"reasons": {}
},
{
"tool": "profile_groups_initialize_connection",
"tags": [],
"reasons": {}
},
{
"tool": "profiles_list",
"tags": [],
"reasons": {}
},
{
"tool": "upload_create",
"tags": [],
"reasons": {}
},
{
"tool": "post_publish",
"tags": [],
"reasons": {}
},
{
"tool": "post_status",
"tags": [],
"reasons": {}
},
{
"tool": "post_publish_draft",
"tags": [],
"reasons": {}
},
{
"tool": "post_update",
"tags": [],
"reasons": {}
},
{
"tool": "post_delete",
"tags": [],
"reasons": {}
},
{
"tool": "post_delete_on_platform",
"tags": [],
"reasons": {}
},
{
"tool": "history_list",
"tags": [],
"reasons": {}
},
{
"tool": "post_stats",
"tags": [],
"reasons": {}
},
{
"tool": "profiles_placements",
"tags": [],
"reasons": {}
},
{
"tool": "profiles_stats",
"tags": [],
"reasons": {}
},
{
"tool": "queues_list",
"tags": [],
"reasons": {}
},
{
"tool": "queues_get",
"tags": [],
"reasons": {}
},
{
"tool": "queues_create",
"tags": [],
"reasons": {}
},
{
"tool": "queues_update",
"tags": [],
"reasons": {}
},
{
"tool": "queues_delete",
"tags": [],
"reasons": {}
},
{
"tool": "queues_next_slot",
"tags": [],
"reasons": {}
},
{
"tool": "comments_list",
"tags": [],
"reasons": {}
},
{
"tool": "comments_get",
"tags": [],
"reasons": {}
},
{
"tool": "comments_create",
"tags": [],
"reasons": {}
},
{
"tool": "comments_delete",
"tags": [],
"reasons": {}
},
{
"tool": "comments_hide",
"tags": [],
"reasons": {}
},
{
"tool": "comments_unhide",
"tags": [],
"reasons": {}
},
{
"tool": "comments_like",
"tags": [],
"reasons": {}
},
{
"tool": "comments_unlike",
"tags": [],
"reasons": {}
},
{
"tool": "profile_comments_list",
"tags": [],
"reasons": {}
},
{
"tool": "profile_comments_get",
"tags": [],
"reasons": {}
},
{
"tool": "profile_comments_create",
"tags": [],
"reasons": {}
},
{
"tool": "profile_comments_delete",
"tags": [],
"reasons": {}
},
{
"tool": "dm_chats_list",
"tags": [],
"reasons": {}
},
{
"tool": "dm_chat_create",
"tags": [],
"reasons": {}
},
{
"tool": "dm_chat_get",
"tags": [],
"reasons": {}
},
{
"tool": "dm_messages_list",
"tags": [],
"reasons": {}
},
{
"tool": "dm_message_send",
"tags": [],
"reasons": {}
},
{
"tool": "dm_message_get",
"tags": [],
"reasons": {}
},
{
"tool": "dm_message_edit",
"tags": [],
"reasons": {}
},
{
"tool": "dm_message_react",
"tags": [],
"reasons": {}
},
{
"tool": "dm_message_unreact",
"tags": [],
"reasons": {}
},
{
"tool": "dm_chat_archive",
"tags": [],
"reasons": {}
},
{
"tool": "dm_chat_unarchive",
"tags": [],
"reasons": {}
},
{
"tool": "dm_comment_private_reply",
"tags": [],
"reasons": {}
},
{
"tool": "google_business_location_get",
"tags": [],
"reasons": {}
},
{
"tool": "google_business_location_update",
"tags": [],
"reasons": {}
},
{
"tool": "google_business_categories_list",
"tags": [],
"reasons": {}
},
{
"tool": "google_business_hours_update",
"tags": [],
"reasons": {}
},
{
"tool": "google_business_attributes_get",
"tags": [],
"reasons": {}
},
{
"tool": "google_business_attributes_available",
"tags": [],
"reasons": {}
},
{
"tool": "google_business_attributes_update",
"tags": [],
"reasons": {}
},
{
"tool": "google_business_service_list_get",
"tags": [],
"reasons": {}
},
{
"tool": "google_business_service_list_update",
"tags": [],
"reasons": {}
},
{
"tool": "google_business_food_menus_get",
"tags": [],
"reasons": {}
},
{
"tool": "google_business_food_menus_update",
"tags": [],
"reasons": {}
},
{
"tool": "google_business_place_action_links_list",
"tags": [],
"reasons": {}
},
{
"tool": "google_business_place_action_link_create",
"tags": [],
"reasons": {}
},
{
"tool": "google_business_place_action_link_update",
"tags": [],
"reasons": {}
},
{
"tool": "google_business_place_action_link_delete",
"tags": [],
"reasons": {}
},
{
"tool": "google_business_media_list",
"tags": [],
"reasons": {}
},
{
"tool": "google_business_media_create",
"tags": [],
"reasons": {}
},
{
"tool": "google_business_media_delete",
"tags": [],
"reasons": {}
}
],
"surfaceDigest": "382d69a5e19d184649d91e0bb6b0926554c2d247c6ec3032b43b8d9d3e440e57",
"stats": {
"tools": 64,
"prompts": 0,
"resources": 0,
"findingsBySeverity": {
"critical": 0,
"high": 0,
"medium": 0,
"low": 1,
"info": 0
}
}
}