Open Primitive — 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": "open-primitive-mcp",
"source": {
"kind": "package",
"origin": "open-primitive-mcp"
},
"server": {
"name": "open-primitive-mcp"
}
},
"grade": "A",
"score": {
"score": 96,
"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": "moderate",
"label": "capability blast radius (moderate) — client exposure if the model is manipulated",
"appliedPenalty": 3
},
{
"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": "moderate",
"reasons": [
"can send data / act on an external service"
],
"tags": [
"external-sink"
]
},
"coverage": {
"level": "source",
"inputs": {
"toolSurface": true,
"implementationSource": true,
"packageMetadata": true,
"liveTransport": false
},
"caveats": [
"Tools were statically extracted from the published source (34 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 (mcp.js)",
"category": "exfiltration",
"severity": "medium",
"confidence": "strong",
"description": "In the server's implementation (`mcp.js:343`): 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": "mcp.js"
},
"evidence": "); const resp = await fetch(`https://api.openprimitive.com/v1/reclaim/search?${params}`); const data = await resp.js",
"owasp": "LLM02:2025 Sensitive Information Disclosure",
"data": {
"rule": "MTC-SRC-003",
"file": "mcp.js",
"line": 343,
"nonRuntime": false
}
},
{
"ruleId": "MTC-CAP-007",
"title": "Unconstrained URL/host parameter \"webhook_url\" on \"create-subscription\"",
"category": "network",
"severity": "medium",
"confidence": "heuristic",
"description": "Tool \"create-subscription\" takes a URL/host parameter \"webhook_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": "create-subscription",
"field": "inputSchema.properties.webhook_url"
},
"owasp": "LLM06:2025 Excessive Agency",
"data": {
"param": "webhook_url"
}
}
],
"toxicFlows": [],
"capabilities": [
{
"tool": "get-flights",
"tags": [],
"reasons": {}
},
{
"tool": "get-car-safety",
"tags": [],
"reasons": {}
},
{
"tool": "get-food-recalls",
"tags": [],
"reasons": {}
},
{
"tool": "get-water-safety",
"tags": [],
"reasons": {}
},
{
"tool": "get-drug-safety",
"tags": [],
"reasons": {}
},
{
"tool": "get-hospital-quality",
"tags": [],
"reasons": {}
},
{
"tool": "get-health-evidence",
"tags": [],
"reasons": {}
},
{
"tool": "get-nutrition",
"tags": [],
"reasons": {}
},
{
"tool": "get-jobs",
"tags": [],
"reasons": {}
},
{
"tool": "get-demographics",
"tags": [],
"reasons": {}
},
{
"tool": "get-product-recalls",
"tags": [],
"reasons": {}
},
{
"tool": "get-sec-filings",
"tags": [],
"reasons": {}
},
{
"tool": "get-safety-profile",
"tags": [],
"reasons": {}
},
{
"tool": "get-weather",
"tags": [],
"reasons": {}
},
{
"tool": "get-location-profile",
"tags": [],
"reasons": {}
},
{
"tool": "get-comparison",
"tags": [],
"reasons": {}
},
{
"tool": "ask-question",
"tags": [],
"reasons": {}
},
{
"tool": "get-risk",
"tags": [],
"reasons": {}
},
{
"tool": "get-eligible",
"tags": [],
"reasons": {}
},
{
"tool": "get-air-quality",
"tags": [],
"reasons": {}
},
{
"tool": "get-alerts",
"tags": [],
"reasons": {}
},
{
"tool": "federated-query",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"open_pr\""
]
}
},
{
"tool": "get-meat-safety",
"tags": [],
"reasons": {}
},
{
"tool": "search-unclaimed-property",
"tags": [],
"reasons": {}
},
{
"tool": "search-court-records",
"tags": [],
"reasons": {}
},
{
"tool": "search-federal-register",
"tags": [],
"reasons": {}
},
{
"tool": "get-federal-register-document",
"tags": [],
"reasons": {}
},
{
"tool": "search-schools",
"tags": [],
"reasons": {}
},
{
"tool": "get-school",
"tags": [],
"reasons": {}
},
{
"tool": "get-electricity-price",
"tags": [],
"reasons": {}
},
{
"tool": "get-broadband",
"tags": [],
"reasons": {}
},
{
"tool": "query-entity-graph",
"tags": [],
"reasons": {}
},
{
"tool": "create-subscription",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"open_pr\"",
"parameter \"webhook\""
]
}
},
{
"tool": "assess-compliance",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"open_pr\""
]
}
}
],
"surfaceDigest": "8d3cbd070f669047c275e227dcc6f0438bbee89208fcdaf30640b75c00afbd2f",
"stats": {
"tools": 34,
"prompts": 0,
"resources": 0,
"findingsBySeverity": {
"critical": 0,
"high": 0,
"medium": 2,
"low": 0,
"info": 0
}
}
}