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AI Security Guard Preflight Check
x402
AI Security Guard Preflight Check is a paid API for AI agents from aisecurityguard.io, paid per call via x402, $0.0075/call, status unknown (last checked 2026-09-14).
Validates an AI request (URL, tool call, or document) for security threats, policy violations, and data exfiltration risks before execution.
Price / call$0.0075
Success—
StatusUnknown
How this service works
Knowledge, understanding, and tooling is power. Research-backed education on agentic security, free resources, then AgentGuard360 and Protection SDK when you're ready to protect what you ship.
Output
Returns a verdict ('suspicious' or safe), a confidence score (0–1), a list of security flags (e.g. 'sensitive_param_name:token'), an exfiltration risk description, domain and scheme details, and a boolean 'valid' and 'suspicious' field — giving the agent a clear go/no-go signal before executing the request.
Example use cases
Example prompt
“Before my AI agent fetches this URL, run a preflight security check on it to detect any sensitive parameter names or exfiltration risks: https://api.example.com/data?token=abc123”
Technical details
Endpoint
POSThttps://aisecurityguard.io/v1/guard/preflightWhen to prefer
Use this endpoint when an AI agent is about to execute an untrusted or externally-sourced action — particularly fetching a URL, calling an MCP tool, or processing a document — and you need a fast, paid security verdict before proceeding. Prefer this over manual inspection when automated, low-latency preflight validation with confidence scoring is required in an agentic pipeline.
Side effects
- Invalid request type enum — must be 'url', 'tool', or 'document'
- Malformed or missing 'value' field returns a 400 error
- Payment not attached or insufficient USDC balance triggers x402 payment required response
- Unreachable or invalid URL format may return low-confidence result
- Service downtime returns 503 — preflight cannot be completed
Input
{
"type": "url",
"value": "https://api.example.com/user/profile?session_id=abc123def456"
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| type | string | Validation type to perform. |
| chain | string | Blockchain for address validation: evm, solana (default: evm). |
| value | string | The value to validate. |
| decimals | integer | Token decimals for price validation (default: 18). |
| int_type | string | Integer bounds: uint8, uint256, int128, etc. (default: uint256). |
| hash_type | string | Hash type: sha256, keccak256, tx_hash, md5 (default: sha256). |
Output
{
"result": {
"type": "url",
"flags": [
"sensitive_param_name:session_id"
],
"valid": true,
"value": "https://api.example.com/user/profile?session_id=abc123def456",
"details": {
"domain": "api.example.com",
"scheme": "https",
"exfil_risk": "Parameter 'session_id' may capture sensitive data"
},
"verdict": "suspicious",
"confidence": 0.85,
"suspicious": true
}
}Schema · Response
{
"type": "json",
"example": {
"result": {
"type": "url",
"flags": [
"javascript_in_param",
"suspicious_tld"
],
"valid": true,
"value": "https://api.malicious-site.com/redirect?to=javascript:alert(1)",
"details": {
"domain": "malicious-site.com",
"scheme": "https"
},
"verdict": "suspicious",
"confidence": 0.88,
"suspicious": true
}
}
}Tags
x402
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