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Nomos MCP Server Risk Check
x402
Nomos MCP Server Risk Check is a paid API for AI agents from base-agent-preflight.bytoken2023.workers.dev, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).
Performs a risk assessment on a given MCP server URL, returning a risk score, risk level, and any flags indicating suspicious or dangerous behavior.
Price / call$0.02
Success—
StatusUnknown
How this service works
Machine-payable service intelligence for discovering, verifying, and monitoring identity, risk, authorization, execution-preflight, and evidence APIs before autonomous agents spend.
Output
Returns a JSON object containing the network identifier (e.g. eip155:8453), the product name ('mcp-server-risk-check'), and an assessment object with a numeric risk_score (0–100), a risk_level string (e.g. 'low', 'medium', 'high'), and a flags array listing any specific risk signals detected. May also include identity, activity, and provenance objects with additional context.
Example use cases
Preflight check before agent tool use
“Before my agent connects to https://tools.acme.com/mcp and starts calling its tools, run a risk assessment on it — it uses SSE transport and bearer auth — and tell me the risk level and any flags.”
Screening unknown community MCP server
“I found a public MCP server at https://community-mcp.dev/server that exposes tools called 'execute_shell,read_file,write_file' over stdio with no auth — can you risk-check it before I let my agent use it?”
Agent safety gate in automated workflow
“My workflow is about to connect to https://partner-agent.io/mcp which uses HTTP transport and API key auth — check its risk score first and only proceed if the risk level comes back as low.”
Technical details
Endpoint
GEThttps://base-agent-preflight.bytoken2023.workers.dev/v1/x402/agent/mcp-server-risk-checkWhen to prefer
Use this endpoint when an AI agent needs to perform a security preflight check on an MCP server before connecting to or executing tools from it. Prefer this over generic URL scanners when you need MCP-specific risk signals (transport mode, auth mode, exposed tools) returned in a structured agent-readable format with a numeric risk score and actionable flags.
Side effects
- Invalid or unreachable server_url returns an error or degraded assessment
- Missing required 'server_url' query parameter results in a validation error
- Unknown or unsupported transport/auth enum values may yield incomplete scoring
- Payment not received (x402 flow incomplete) results in 402 Payment Required response
- Rate limiting or worker timeout for slow-responding MCP servers
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"network": "eip155:8453",
"product": "mcp-server-risk-check",
"assessment": {
"flags": [],
"risk_level": "low",
"risk_score": 0
}
}
}Tags
x402
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