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Tool Result Schema Validator
x402
Tool Result Schema Validator is a paid API for AI agents from phion.systems, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-23).
Validates AI tool output JSON against a bounded top-level JSON Schema subset to ensure structural correctness and safety
Price / call$0.002
Success—
StatusUnknown
How this service works
Validate tool output against a bounded top-level JSON Schema subset
Output
Returns a validation outcome indicating whether the provided tool output JSON conforms to the specified bounded top-level JSON Schema subset, including pass/fail status and any specific schema violations or errors encountered.
Example use cases
Agentic pipeline schema gate
“Before passing this tool's JSON output to the next stage, validate it against my expected schema to make sure the structure is correct and nothing unexpected is in there.”
Tool output safety check
“My agent just got back a result from an external tool — can you run it through the schema validator to confirm it matches the bounded JSON Schema I defined and flag any fields that don't comply?”
Multi-agent handoff validation
“I'm handing off data between two agents and I need to verify the outgoing tool result conforms to the agreed JSON schema before the receiving agent tries to process it — can you check it now?”
Technical details
Endpoint
POSThttps://phion.systems/v1/paid/trust/tool-result-schema-validator?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, deterministic, paid-integrity validation of agent tool output against a structured JSON Schema — particularly in agentic pipelines where schema compliance must be verified before downstream processing, and where a signed or auditable validation result adds trust over a local validation library.
Side effects
- Invalid or malformed JSON submitted as tool output returns a parse error
- Schema definition itself is outside the bounded subset and is rejected as unsupported
- Tool output contains fields that violate schema constraints, returning detailed error paths
- Empty or missing payload results in a 400-level error
- Schema version mismatch or unsupported draft directive causes rejection
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| outputrequired | object |
Output
Schema · Response
{
"type": "json"
}Tags
x402
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