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Forest Agent Tools JSON Schema Validator
x402
Forest Agent Tools JSON Schema Validator is a paid API for AI agents from http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-22).
Validates caller-supplied JSON against the Forest bounded JSON Schema subset v1 and returns deterministic, machine-readable violation reports with stable paths — no network I/O, inference, or mutation.
Price / call$0.001
Success—
StatusUnknown
How this service works
Machine-readable contract for active Forest paid capabilities. Unsigned paid calls return HTTP 402 with a PAYMENT-REQUIRED x402 challenge.
Output
A deterministic, machine-readable report of schema violations found in the submitted JSON value, including stable dot-notation or JSON Pointer paths to each offending field and a description of each violation. Returns an empty violations list if the value is fully valid. No mutations are made to the input.
Example use cases
Validate LLM structured output before use
“The model just returned this JSON blob and I need to make sure it actually matches my expected schema before I send it downstream — can you run it through Forest's JSON validator and show me any violation paths?”
Guard agent pipeline against malformed payloads
“My agent is about to forward a structured payload to the next tool, but I want to verify it conforms to the contract schema first — validate this JSON value against the schema and tell me if anything is off.”
Audit third-party API response for contract compliance
“I got this response back from an external API and I want to confirm it matches the schema I defined — use the Forest JSON validator to check it and list every property that violates the schema.”
Technical details
Endpoint
POSThttps://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/json/validate?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, deterministic, side-effect-free JSON schema validation with stable violation paths — especially in agent pipelines where you must verify structured LLM output or third-party payloads before trusting or forwarding them. Prefer this over general-purpose validators when you need machine-readable violation paths and guaranteed no network I/O, remote $ref resolution, or regex evaluation, making it safe to call in sandboxed or latency-sensitive agent workflows.
Side effects
- Malformed JSON in the value or schema field returns a parse error
- Schema uses features outside the Forest bounded subset (e.g. remote $ref, regex patterns) — unsupported keywords are ignored or rejected
- Missing required fields (value or schema) returns a 400-level error
- Payment not included or invalid causes HTTP 402 response
- Extremely deeply nested schemas may hit processing limits
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| value | — | Public value value used to scope this lookup. |
| schema | object | Public schema value used to scope this lookup. |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"data": {
"valid": false,
"truncated": false,
"violations": [],
"input_bytes": 0,
"schema_nodes": 1,
"schema_scope": "forest_bounded_json_schema_subset_v1",
"violation_count": 0,
"value_nodes_visited": 0
},
"meta": {
"cache": "miss",
"provider": "local-json",
"checked_at": "2026-01-01T00:00:00.000Z",
"duration_ms": 0
},
"version": "1",
"capability": "json.validate"
}
}Tags
x402
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