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vrsai SQL Preflight Check
x402
vrsai SQL Preflight Check is a paid API for AI agents from api.vrsai.tech, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).
Validates PostgreSQL SQL statements immediately before execution to detect and block destructive or unsafe database operations by AI agents and automated systems.
Price / call$0.05
Success—
StatusUnknown
How this service works
Check PostgreSQL SQL immediately before execution to prevent destructive or unsafe database changes by AI agents and automated systems.
Output
The endpoint returns a safety assessment of the submitted SQL statement, indicating whether it is safe to execute or should be blocked, along with identified risk flags such as destructive operations (DROP, TRUNCATE, DELETE without WHERE), unscoped bulk modifications, or other unsafe patterns that could cause data loss or unintended state changes.
Example use cases
Guarding AI-generated schema migrations
“I'm letting an AI agent write and run database migrations automatically — before any SQL gets executed against our PostgreSQL database, run it through the vrsai SQL preflight check to block anything that could drop tables or wipe data.”
Blocking runaway DELETE in agentic workflow
“My automated agent just generated a DELETE statement with no WHERE clause — can you send it to the vrsai SQL preflight endpoint right now to check if it's safe before it runs?”
Compliance review for AI database writes
“We need every INSERT and UPDATE that our AI assistant produces to be checked for unsafe patterns before hitting production PostgreSQL — run this SQL through vrsai's preflight check and tell me if it's cleared or flagged.”
Technical details
Endpoint
POSThttps://api.vrsai.tech/v1/capabilities/sql_preflight/versions/1.0.0/executeWhen to prefer
Choose this endpoint when you need a real-time, pre-execution safety gate specifically for PostgreSQL SQL in agentic or automated pipelines. It is ideal when AI agents are generating or executing SQL autonomously and human review is not feasible before every query. Prefer it over generic SQL linters when you need a decision-ready approve/block signal rather than style feedback, and especially when the risk of data loss or destructive operations from AI-generated queries is a primary concern.
Side effects
- Malformed SQL input may return a parse error or rejection
- Non-PostgreSQL SQL dialects may not be accurately assessed
- Payment failure (402) if USDC balance is insufficient
- Schema validation error if required body fields are missing or incorrectly typed
- Network timeout if the API is temporarily unreachable
- False negatives on highly obfuscated or dynamically constructed SQL strings
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"checks": [
{
"id": "parse_validity",
"status": "PASS"
},
{
"id": "statement_count",
"status": "PASS",
"evidence": {
"count": 1
}
},
{
"id": "unbounded_delete",
"status": "BLOCK",
"reason_code": "DELETE_WITHOUT_WHERE",
"statement_index": 0
},
{
"id": "protected_relation_mutation",
"status": "BLOCK",
"evidence": {
"relations": [
{
"name": "customers"
}
]
},
"reason_code": "PROTECTED_RELATION_MUTATION",
"statement_index": 0
},
{
"id": "expected_statement_kind",
"status": "PASS",
"statement_index": 0
}
],
"coverage": {
"dialect": "postgresql",
"assessment_scope": [
"unbounded_delete",
"unbounded_update",
"truncate",
"destructive_drop",
"destructive_cascade",
"alter_table_hazards",
"nonconcurrent_index",
"create_extension",
"protected_relation_mutation",
"dynamic_or_procedural_sql",
"expected_statement_kind",
"multi_statement_evaluation"
],
"checks_performed": [
"unbounded_delete",
"unbounded_update",
"truncate",
"destructive_drop",
"destructive_cascade",
"alter_table_hazards",
"nonconcurrent_index",
"create_extension",
"protected_relation_mutation",
"dynamic_or_procedural_sql",
"expected_statement_kind",
"multi_statement_evaluation"
],
"checks_not_performed": [
"privilege_change",
"explicit_locking",
"alter_system",
"availability_maintenance",
"external_program_execution",
"drop_schema_or_database",
"read_cost_and_row_estimation",
"sensitive_data_access_and_exfiltration",
"tenant_isolation",
"semantic_correctness"
],
"complete_for_declared_scope": true
},
"decision": "BLOCK",
"statements": [
{
"kind": "DELETE",
"index": 0,
"decision": "BLOCK",
"relations": [
{
"name": "customers"
}
],
"mutates_data": true,
"reason_codes": [
"DELETE_WITHOUT_WHERE",
"PROTECTED_RELATION_MUTATION"
],
"administrative": false,
"changes_schema": false,
"changes_privileges": false
}
],
"reason_codes": [
"DELETE_WITHOUT_WHERE",
"PROTECTED_RELATION_MUTATION"
],
"machine_action": "DO_NOT_EXECUTE",
"ruleset_version": "1.0.0",
"statement_count": 1,
"input_fingerprint": "v1:4634deedb0970b042098df09e6f8bf365f2ddb635a18742c5ffa676844e4fa62"
}
}Tags
x402
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