Compeller — the complete, unedited output of the deterministic mcptrustchecker engine v1.12.1, scanned . Every finding, capability tag and score component below is exactly what the engine produced — no AI, no post-processing.
{
"tool": {
"name": "mcptrustchecker",
"version": "1.12.1",
"methodologyVersion": "mcptrustchecker-1.12"
},
"target": {
"id": "https://compeller.ai/api/mcp",
"source": {
"kind": "http",
"origin": "https://compeller.ai/api/mcp"
},
"server": {
"name": "compeller-mcp",
"version": "0.5.0"
}
},
"grade": "A",
"score": {
"score": 97,
"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": "coverage-honesty",
"level": "live",
"label": "inspection depth (live) — how much of the target the scan could see",
"appliedPenalty": 0
}
],
"gatesFired": [],
"methodologyVersion": "mcptrustchecker-1.12"
},
"capability": {
"level": "moderate",
"reasons": [
"ingests untrusted external content (a prompt-injection entry point)",
"can send data / act on an external service"
],
"tags": [
"external-sink",
"untrusted-input"
]
},
"coverage": {
"level": "live",
"inputs": {
"toolSurface": true,
"implementationSource": false,
"packageMetadata": false,
"liveTransport": true
},
"caveats": []
},
"findings": [
{
"ruleId": "MTC-FLOW-005",
"title": "Untrusted input can drive an external action",
"category": "exfiltration",
"severity": "medium",
"confidence": "strong",
"description": "Untrusted-input tools ([get_lighting_cue]) co-exist with external-action tools ([register_webhook, delete_webhook, test_webhook_delivery, update_webhook, rotate_webhook_secret]). A prompt injection could cause unwanted external actions, though no direct sensitive-data leak path was found.",
"remediation": "Require confirmation for state-changing/egress actions triggered after processing untrusted content.",
"location": {
"kind": "flow",
"name": "get_lighting_cue → register_webhook"
},
"evidence": "untrusted [get_lighting_cue] → sinks [register_webhook, delete_webhook, test_webhook_delivery, update_webhook, rotate_webhook_secret]",
"owasp": "LLM06:2025 Excessive Agency",
"references": [],
"data": {
"untrusted": [
"get_lighting_cue"
],
"sinks": [
"register_webhook",
"delete_webhook",
"test_webhook_delivery",
"update_webhook",
"rotate_webhook_secret"
]
}
},
{
"ruleId": "MTC-CAP-007",
"title": "Unconstrained URL/host parameter \"url\" on \"register_webhook\"",
"category": "network",
"severity": "medium",
"confidence": "heuristic",
"description": "Tool \"register_webhook\" 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": "register_webhook",
"field": "inputSchema.properties.url"
},
"owasp": "LLM06:2025 Excessive Agency",
"data": {
"param": "url"
}
},
{
"ruleId": "MTC-CAP-007",
"title": "Unconstrained URL/host parameter \"url\" on \"update_webhook\"",
"category": "network",
"severity": "medium",
"confidence": "heuristic",
"description": "Tool \"update_webhook\" 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": "update_webhook",
"field": "inputSchema.properties.url"
},
"owasp": "LLM06:2025 Excessive Agency",
"data": {
"param": "url"
}
},
{
"ruleId": "MTC-NET-005",
"title": "Remote HTTP MCP endpoint",
"category": "network",
"severity": "info",
"confidence": "strong",
"description": "Remote endpoint compeller.ai. MCP Trust Checker does not test server-side authentication/authorization; verify the endpoint requires auth.",
"location": {
"kind": "transport"
}
}
],
"toxicFlows": [
{
"id": "flow-1",
"severity": "medium",
"confidence": "strong",
"untrustedInput": [
"get_lighting_cue"
],
"sensitiveSource": [],
"externalSink": [
"register_webhook",
"delete_webhook",
"test_webhook_delivery",
"update_webhook",
"rotate_webhook_secret"
],
"selfContained": false,
"description": "Untrusted input can drive an external action even though no sensitive source is exposed."
}
],
"capabilities": [
{
"tool": "get_capabilities",
"tags": [],
"reasons": {}
},
{
"tool": "get_pricing",
"tags": [],
"reasons": {}
},
{
"tool": "list_styles",
"tags": [],
"reasons": {}
},
{
"tool": "upload_media",
"tags": [],
"reasons": {}
},
{
"tool": "search_music",
"tags": [],
"reasons": {}
},
{
"tool": "create_compel_from_music",
"tags": [],
"reasons": {}
},
{
"tool": "create_compel",
"tags": [],
"reasons": {}
},
{
"tool": "get_compel",
"tags": [],
"reasons": {}
},
{
"tool": "start_render",
"tags": [],
"reasons": {}
},
{
"tool": "list_compels",
"tags": [],
"reasons": {}
},
{
"tool": "search_compels",
"tags": [],
"reasons": {}
},
{
"tool": "list_renderings",
"tags": [],
"reasons": {}
},
{
"tool": "get_rendering",
"tags": [],
"reasons": {}
},
{
"tool": "search_media",
"tags": [],
"reasons": {}
},
{
"tool": "register_webhook",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"webhook\""
]
}
},
{
"tool": "list_webhooks",
"tags": [],
"reasons": {}
},
{
"tool": "delete_webhook",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"webhook\"",
"parameter \"webhook\""
]
}
},
{
"tool": "test_webhook_delivery",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"webhook\"",
"parameter \"webhook\""
]
}
},
{
"tool": "update_webhook",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"webhook\"",
"parameter \"webhook\""
]
}
},
{
"tool": "rotate_webhook_secret",
"tags": [
"external-sink"
],
"reasons": {
"external-sink": [
"keyword \"webhook\"",
"parameter \"webhook\""
]
}
},
{
"tool": "cancel_compel",
"tags": [],
"reasons": {}
},
{
"tool": "get_account_credits",
"tags": [],
"reasons": {}
},
{
"tool": "list_lighting_effects",
"tags": [],
"reasons": {}
},
{
"tool": "launch_lighting_cue",
"tags": [],
"reasons": {}
},
{
"tool": "list_lighting_cues",
"tags": [],
"reasons": {}
},
{
"tool": "get_lighting_cue",
"tags": [
"untrusted-input"
],
"reasons": {
"untrusted-input": [
"keyword \"fetch\""
]
}
},
{
"tool": "stop_lighting_cue",
"tags": [],
"reasons": {}
},
{
"tool": "set_lighting_cue_variables",
"tags": [],
"reasons": {}
},
{
"tool": "ack_lighting_cue",
"tags": [],
"reasons": {}
},
{
"tool": "report_lighting_cue",
"tags": [],
"reasons": {}
}
],
"surfaceDigest": "90a9b2691c8b58725c675aa11df79277fb6e343f79535abdee151f3aae611015",
"stats": {
"tools": 30,
"prompts": 0,
"resources": 0,
"findingsBySeverity": {
"critical": 0,
"high": 0,
"medium": 3,
"low": 0,
"info": 1
}
}
}