Tool detail
SQLPermit
Checks a PostgreSQL statement against a policy using Postgres's own parser and can issue a signed, statement-bound execution permit.
Categories: Security
Use when
- check if an agent-written SQL statement is safe to run
- get a signed permit authorizing one exact SQL statement
- block stacked statements or writes hidden in a CTE
Not for
- never connects to or executes against your database
Inputs
POST JSON body: dialect='postgresql', target_pg_major=18, sql (required); policy object, audience, subject, issue_permit (optional)
Admitted input schema
{
"type": "object",
"properties": {
"audience": {
"type": "string",
"minLength": 0,
"maxLength": 4096,
"description": "Identity of the ONE executor the permit is for. Required when issue_permit is true. Wildcards are rejected."
},
"dialect": {
"type": "string",
"minLength": 0,
"maxLength": 4096,
"enum": [
"postgresql"
]
},
"issue_permit": {
"type": "boolean"
},
"policy": {
"type": "object",
"properties": {
"allow_multi_statement": {
"type": "boolean",
"description": "Permit more than one statement in the input. Defaults to false."
},
"allow_returning": {
"type": "boolean",
"description": "Accept RETURNING on a permitted write without a warning."
},
"allow_row_locks": {
"type": "boolean",
"description": "Accept SELECT ... FOR UPDATE without a warning."
},
"allowed_functions": {
"type": "array",
"items": {
"type": "string",
"minLength": 0,
"maxLength": 4096
},
"minItems": 0,
"maxItems": 100,
"description": "Added to the built-in allowlist. Bare name, or schema.function to admit one of your own."
},
"allowed_languages": {
"type": "array",
"items": {
"type": "string",
"minLength": 0,
"maxLength": 4096
},
"minItems": 0,
"maxItems": 100,
"description": "Permitted CREATE FUNCTION languages. Defaults to none."
},
"allowed_schemas": {
"type": "array",
"items": {
"type": "string",
"minLength": 0,
"maxLength": 4096
},
"minItems": 0,
"maxItems": 100,
"description": "Schemas the statement may reference."
},
"allowed_tables": {
"type": "array",
"items": {
"type": "string",
"minLength": 0,
"maxLength": 4096
},
"minItems": 0,
"maxItems": 100,
"description": "Permitted relations as schema.table, or a bare name to match an unqualified reference."
},
"max_rows": {
"type": "integer",
"minimum": 1,
"maximum": 9007199254740991,
"description": "Row ceiling. Becomes a permit obligation the executor enforces."
},
"read_only": {
"type": "boolean",
"description": "Reject anything that can change data or schema, including writes reached through a CTE."
},
"statement_timeout_ms": {
"type": "integer",
"minimum": 1,
"maximum": 9007199254740991,
"description": "Timeout written into the permit obligations. Defaults to 30000."
}
},
"required": [],
"additionalProperties": false
},
"sql": {
"type": "string",
"minLength": 1,
"maxLength": 4096
},
"subject": {
"type": "string",
"minLength": 0,
"maxLength": 4096,
"description": "Opaque caller label recorded as the permit subject."
},
"target_pg_major": {
"type": "integer",
"minimum": -9007199254740991,
"maximum": 9007199254740991,
"enum": [
18
],
"description": "Required. The PostgreSQL major the statement will run on. Only 18 is supported in v1: a permit issued under one grammar and verified against another is a parser differential."
}
},
"required": [
"dialect",
"target_pg_major",
"sql"
],
"additionalProperties": false
}Endpoint
- Method
POST- URL
https://sqlpermit.schemasure.com/v1/guard/sql
Payment
- Protocol
- x402
- Listed price
- 0.01 USDC per call on Base
- Payment method
- exact
- Network
- eip155:8453
- Asset
- 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Listed terms are catalog metadata. The caller supplies inputs and calls the tool outside Onelayer. If payment is required, the caller uses a compatible wallet to pay.
Source
- Directory
- Coinbase x402 Bazaar
- Record
- POST https://sqlpermit.schemasure.com/v1/guard/sql
- Retrieved
- 2026-09-30T20:37:07.382Z
- Catalog file SHA-256
6837ccddf886f0007cf3727ea9d27faaa5047b51b4f425345c554ce1c271a524- Catalog built
- 2026-09-30T22:31:58.034Z