Untappd — 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": "untappd-mcp",
"source": {
"kind": "package",
"origin": "untappd-mcp"
},
"server": {
"name": "untappd-mcp"
}
},
"grade": "A",
"score": {
"score": 94,
"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": "high",
"label": "capability blast radius (high) — client exposure if the model is manipulated",
"appliedPenalty": 6
},
{
"kind": "client",
"term": "verification-discount",
"level": "source",
"label": "publisher verification (provenance) — cryptographic build provenance ties the artifact to its source",
"appliedPenalty": 0
},
{
"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": "high",
"reasons": [
"ingests untrusted external content (a prompt-injection entry point)",
"can execute shell commands or code"
],
"tags": [
"untrusted-input",
"code-exec"
]
},
"coverage": {
"level": "source",
"inputs": {
"toolSurface": true,
"implementationSource": true,
"packageMetadata": true,
"liveTransport": false
},
"caveats": [
"Tools were statically extracted from the published source (41 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-001",
"title": "Dynamic code execution in server code (dist/bundle.js)",
"category": "permissions",
"severity": "high",
"confidence": "strong",
"description": "In the server's implementation (`dist/bundle.js:2946`): Evaluating strings as code is the most direct RCE primitive; if any tool input reaches it, the server executes attacker-chosen code. 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": "dist/bundle.js"
},
"evidence": "const makeValidate = new Function(`${names_1.default.self}`, `${names_1.default.scope}`, sourceCode); const v",
"owasp": "LLM05:2025 Improper Output Handling",
"data": {
"rule": "MTC-SRC-001",
"file": "dist/bundle.js",
"line": 2946,
"nonRuntime": false
}
},
{
"ruleId": "MTC-CAP-007",
"title": "Unconstrained URL/host parameter \"url\" on \"untappd_open_url\"",
"category": "network",
"severity": "medium",
"confidence": "heuristic",
"description": "Tool \"untappd_open_url\" takes a URL/host parameter \"url\" with no allowlist/pattern. An outbound-request tool with an unbounded destination enables SSRF and cloud-metadata access (e.g. 169.254.169.254).",
"remediation": "Allowlist destinations or constrain the parameter; block private/link-local addresses server-side.",
"location": {
"kind": "tool",
"name": "untappd_open_url",
"field": "inputSchema.properties.url"
},
"owasp": "LLM06:2025 Excessive Agency",
"data": {
"param": "url"
}
}
],
"toxicFlows": [],
"capabilities": [
{
"tool": "untappd_search_beer",
"tags": [],
"reasons": {}
},
{
"tool": "untappd_beer_info",
"tags": [],
"reasons": {}
},
{
"tool": "untappd_beer_activity",
"tags": [],
"reasons": {}
},
{
"tool": "untappd_search_brewery",
"tags": [],
"reasons": {}
},
{
"tool": "untappd_brewery_info",
"tags": [],
"reasons": {}
},
{
"tool": "untappd_brewery_beers",
"tags": [],
"reasons": {}
},
{
"tool": "untappd_sync_checkins",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "untappd_sync_user_beers",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "untappd_cache_has_had",
"tags": [],
"reasons": {}
},
{
"tool": "untappd_cache_has_had_many",
"tags": [],
"reasons": {}
},
{
"tool": "untappd_cache_not_had",
"tags": [],
"reasons": {}
},
{
"tool": "untappd_cache_query",
"tags": [],
"reasons": {}
},
{
"tool": "untappd_top_not_had",
"tags": [],
"reasons": {}
},
{
"tool": "untappd_toast",
"tags": [],
"reasons": {}
},
{
"tool": "untappd_add_comment",
"tags": [],
"reasons": {}
},
{
"tool": "untappd_delete_comment",
"tags": [],
"reasons": {}
},
{
"tool": "untappd_delete_checkin",
"tags": [],
"reasons": {}
},
{
"tool": "untappd_checkin",
"tags": [],
"reasons": {}
},
{
"tool": "untappd_trending",
"tags": [],
"reasons": {}
},
{
"tool": "untappd_notifications",
"tags": [],
"reasons": {}
},
{
"tool": "untappd_local_checkins",
"tags": [],
"reasons": {}
},
{
"tool": "untappd_activity_feed",
"tags": [],
"reasons": {}
},
{
"tool": "untappd_checkin_info",
"tags": [],
"reasons": {}
},
{
"tool": "untappd_resolve",
"tags": [],
"reasons": {}
},
{
"tool": "untappd_open_url",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "untappd_user_info",
"tags": [],
"reasons": {}
},
{
"tool": "untappd_user_checkins",
"tags": [],
"reasons": {}
},
{
"tool": "untappd_user_wishlist",
"tags": [],
"reasons": {}
},
{
"tool": "untappd_user_beers",
"tags": [],
"reasons": {}
},
{
"tool": "untappd_user_badges",
"tags": [],
"reasons": {}
},
{
"tool": "untappd_user_friends",
"tags": [],
"reasons": {}
},
{
"tool": "untappd_user_venues",
"tags": [],
"reasons": {}
},
{
"tool": "untappd_pending_friends",
"tags": [],
"reasons": {}
},
{
"tool": "untappd_healthcheck",
"tags": [],
"reasons": {}
},
{
"tool": "untappd_search_venue",
"tags": [],
"reasons": {}
},
{
"tool": "untappd_venue_info",
"tags": [],
"reasons": {}
},
{
"tool": "untappd_venue_menu",
"tags": [],
"reasons": {}
},
{
"tool": "untappd_venue_by_foursquare",
"tags": [],
"reasons": {}
},
{
"tool": "untappd_venue_activity",
"tags": [],
"reasons": {}
},
{
"tool": "untappd_wishlist_add",
"tags": [],
"reasons": {}
},
{
"tool": "untappd_wishlist_remove",
"tags": [],
"reasons": {}
}
],
"surfaceDigest": "84eb944be6a21512f1f4c57765c13d8e02b8d102c6941996fbad9b3e370cc4dc",
"stats": {
"tools": 41,
"prompts": 0,
"resources": 0,
"findingsBySeverity": {
"critical": 0,
"high": 1,
"medium": 1,
"low": 0,
"info": 0
}
}
}