Pricing

from $1.50 / 1,000 document-validateds

LLM Output Validator: JSON Schema + Repair Hints

Validate LLM/tool-call JSON output against a JSON Schema (draft-07 or 2020-12). Returns machine-readable error paths plus concrete, actionable repair hints per error, and optional deterministic normalization/repair — so an agent can self-correct without an extra LLM round-trip.

Pricing

from $1.50 / 1,000 document-validateds

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0.0

(0)

Developer

Dennis

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Monthly active users

4 days ago

Last modified

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You can access the LLM Output Validator: JSON Schema + Repair Hints programmatically from your own applications by using the Apify API. You can also choose the language preference from below. To use the Apify API, you’ll need an Apify account and your API token, found in API & Integrations in Apify Console.

Python

JavaScript

CLI

OpenAPI

HTTP

MCP

1import { ApifyClient } from 'apify-client';
2
3// Initialize the ApifyClient with your Apify API token
4// Replace the '<YOUR_API_TOKEN>' with your token
5const client = new ApifyClient({
6    token: '<YOUR_API_TOKEN>',
7});
8
9// Prepare Actor input
10const input = {
11    "documents": [
12        "{\"name\": \"Alice\", \"age\": 30, \"email\": \"alice@example.com\"}"
13    ],
14    "schema": {
15        "type": "object",
16        "properties": {
17            "name": {
18                "type": "string"
19            },
20            "age": {
21                "type": "integer",
22                "minimum": 0
23            },
24            "email": {
25                "type": "string",
26                "format": "email"
27            }
28        },
29        "required": [
30            "name",
31            "age",
32            "email"
33        ],
34        "additionalProperties": false
35    }
36};
37
38// Run the Actor and wait for it to finish
39const run = await client.actor("codeclouds/llm-output-validator").call(input);
40
41// Fetch and print Actor results from the run's dataset (if any)
42console.log('Results from dataset');
43console.log(`💾 Check your data here: https://console.apify.com/storage/datasets/${run.defaultDatasetId}`);
44const { items } = await client.dataset(run.defaultDatasetId).listItems();
45items.forEach((item) => {
46    console.dir(item);
47});
48
49// 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/js/docs

LLM Output Validator — JSON Schema + Repair Hints API in JavaScript

The Apify API client for JavaScript is the official library that allows you to use LLM Output Validator: JSON Schema + Repair Hints API in JavaScript or TypeScript, providing convenience functions and automatic retries on errors.

Install the apify-client

$npm install apify-client

Other API clients include:

LLM Output Validator: JSON Schema + Repair Hints API in Python

LLM Output Validator: JSON Schema + Repair Hints API through CLI

LLM Output Validator: JSON Schema + Repair Hints OpenAPI definition

LLM Output Validator: JSON Schema + Repair Hints API

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Infer JSON Schema from sample JSON data and validate JSON documents against existing schemas. Supports Draft-04, Draft-07, and 2019-09. Features nested objects, array item type inference, enum detection, batch validation, and human-readable schema documentation generation.