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Agent402 SQL Guard
x402
Agent402 SQL Guard is a paid API for AI agents from agent402.tools, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-15).
Validates and risk-audits a SQL statement before execution, returning a signed certificate and verdict indicating whether the query is safe to run.
Price / call$0.004
Success—
StatusUnknown
How this service works
Review a SQL statement before running it against production: a pass / warn / block verdict naming concrete risks (unbounded UPDATE or DELETE, tautological WHERE, DROP, TRUNCATE, statement stacking, privilege changes, catalog writes) and, on pass, an Ed25519 certificate bound to the statement's SHA-256 that a database layer can verify before executing. Use it as the last check between an agent and a destructive query.
Output
Returns a JSON object with a verdict ('pass', 'warn', or 'block'), a list of detected risks with IDs, a SHA-256 hash of the submitted statement, a flag indicating whether the statement is mutating, the count of statements detected, and a signed certificate token with an expiry timestamp that downstream systems can use to prove the SQL was pre-audited.
Example use cases
Guard agent-generated SQL before execution
“I'm about to let my AI agent run this SQL it generated — can you audit it for safety and give me a signed certificate I can attach to the execution request? The query is: DELETE FROM orders WHERE status = 'cancelled'”
Enforce read-only SQL in a multi-tenant app
“Before running this query from a user submission, check it for any mutating or destructive operations and block it if it does anything other than SELECT — the SQL is: UPDATE accounts SET balance = 0 WHERE user_id = 99”
Pre-approve a batch of analyst SQL queries
“I need to validate this SQL query before handing it off to the analytics pipeline — scan it for injection risks or missing WHERE clauses and give me a 10-minute certificate if it passes: SELECT revenue, region FROM sales WHERE quarter = 'Q1'”
Technical details
Endpoint
POSThttps://agent402.tools/api/sql-guardWhen to prefer
Use this endpoint when an AI agent or application dynamically generates SQL and needs a security checkpoint before execution — especially to prevent injection attacks, accidental destructive queries, or unauthorized mutations. Prefer this over manual review when you need a machine-readable verdict and a cryptographically signed certificate to enforce pre-approval in downstream systems. Ideal for agentic pipelines where SQL is generated from natural language and must be audited before touching a production database.
Side effects
- SQL contains multiple statements without allowMultiStatement=true → returns block verdict or error
- High-risk operation (e.g. DROP, TRUNCATE) not in allow list → verdict='block'
- Invalid or empty SQL string → validation error response
- TTL outside 30–3600 range → parameter error
- Payment not received or insufficient → x402 payment required response
- Malformed JSON body → HTTP 400 bad request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| sql | string | the exact statement you are about to execute |
| allow | array | risk ids to downgrade from block to warn (see riskCatalogue in the response) |
| ttlSeconds | number | certificate lifetime, 30-3600 (default 300) |
| allowMultiStatement | boolean | permit more than one statement in the submission (default false) |
Output
Schema · Response
{
"type": "json",
"example": {
"risks": [],
"sha256": "635cf20a…",
"verdict": "pass",
"mutating": true,
"certificate": {
"token": "eyJ2Ijox….signature",
"expiresAt": "2026-07-28T20:05:00Z"
},
"statementCount": 1
}
}Tags
x402
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