Pricing

from $1.00 / 1,000 record validateds

LLM Output Guard | JSON Schema Validation for Agent Output

Check that your model's JSON matches the schema you asked for. Every failure comes back with its path, the keyword it broke, and the repair that would fix it. Shape repairs are opt-in and never invent content, so a repair can never hide a real failure.

Pricing

from $1.00 / 1,000 record validateds

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Developer

Brandon Mensing

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Monthly active users

4 days ago

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Configure MCP server with JSON Schema Validator for LLM and Agent Output

The configuration above connects to the hosted Apify MCP server with the JSON Schema Validator for LLM and Agent Output Actor already loaded. It uses OAuth, so your client opens a browser window to sign you in to Apify on first use. No API token is needed. Clients without OAuth support can authenticate with an Authorization: Bearer header carrying an API token from API & Integrations in Apify Console.

Get a ready-to-use configuration for your MCP client with the JSON Schema Validator for LLM and Agent Output Actor preconfigured at https://mcp.apify.com/?tools=fetch-actor-details,broomwagon/llm-output-guard.

You can connect to the Apify MCP Server using clients like Tester MCP Client, or any other MCP client of your choice.

If you want to learn more about our Apify MCP implementation, check out our MCP documentation. To learn more about the Model Context Protocol in general, refer to the official MCP documentation or read our blog post.

JSON Schema Validator for AI Agents | validate_json_schema

scryptex_labs/validate-json-schema

Agent-ready: JSON string + optional schema in → valid/repair/errors with agentHints out. USE WHEN: pipeline validation, LLM output repair, tool chaining. MCP twin at scryptexlabs.com.

Paweł Józefowski

Agent Output Cleaner

yauponlabs/structured-output-cleaner

Fix messy LLM and agent outputs into clean, machine-usable JSON. Repair common structured-output breakage, return a repair report, and fail honestly on ambiguous cases.

Brian Rodriguez

Validate Dataset(s) with JSON Schema

jaroslavhejlek/validate-dataset-with-json-schema

This Actor validates items in one or more datasets against a provided JSON Schema. Use it if you planning to add a dataset validation schema to your actor and you want test it.

Jaroslav Hejlek

iFixit Repair Guide Scraper - DIY Repairs

lulzasaur/ifixit-scraper

Scrape iFixit repair guides and teardowns. Search by device or repair type. Extract step-by-step instructions, tools, parts, difficulty ratings, and images.

lulz bot

JSON Contract Guard MCP

q_services/json-contract-guard-mcp

Validate agent JSON against JSON Schema and return deterministic repairs as RFC 6902 patches.

Q Services

US Auto Repair Directory — Car Repair Shops Scraper

straightforward_hydra/us-auto-repair-directory

Extract auto repair shops in any US state: name, address, phone, website, hours & GPS. Clean B2B lead list from OpenStreetMap. No key.

Dev D

YouTube Transcript Scraper — Never Silent, LLM-Ready

catalini82/youtube-transcript-scraper

Public YouTube transcript scraper with full batch accounting: every input returns a transcript or a typed, actionable failure — the run is never silent. Supports direct videos plus playlist/channel expansion, caption-availability auditing, and LLM-ready output as JSON, text, SRT, WebVTT, or chunks.

Catalin Ionut Iliescu

Structured Data Extractor — URL to JSON

shelvick/structured-extractor

Extract structured data from a batch of URLs as schema-validated JSON. Send web pages and a JSON Schema; it scrapes each (stealth + residential proxy as needed), runs an LLM to convert the page to JSON matching your schema, and validates per URL. Omit schema for best-effort. Public pages only.

Scott Helvick

Auto Repair Shop Email Scraper

solid-scraper/auto-repair-shop-email-scraper

🔧 Auto Repair Shop Email Scraper finds verified email leads for repair businesses by location & keywords. 🚗⚡ Instantly build targeted lists for outreach, marketing, and partnerships—save time and boost conversions with high-accuracy results.

SolidScraper

Usa Home Repair Leads

b2b_lead_generation/usa-home-repair-leads

USA home repair leads finder that extracts verified contact details of local trade and contractor businesses, so sales and marketing teams can instantly build targeted outreach campaigns.