Use LLM Output JSON Extractor with your AI.
Connect your account once and let the AI you already use work with it, without building another integration. Isolates valid JSON objects from mixed markdown/text LLM outputs using deterministic bracket-matching.
Developed, maintained, and hosted by Vinkius.
MCP VERIFIED · PRODUCTION READY · VINKIUS GUARANTEED
Waiting for input…
Works with modern AI clients that support MCP, including ChatGPT, Claude, Cursor, and more.
Complete set · 3 capabilities
The complete LLM Output JSON Extractor capability set.
These are the exact actions your AI can choose when you ask it to work with LLM Output JSON Extractor.
01-03
3 capabilities in this set.
Part of 3 available through LLM Output JSON Extractor.
- 01
Extract JSON
Extracts the first valid JSON object from a raw string
- 02
Get extraction metadata
Provides metrics on the extraction process
- 03
Validate structure
Parse() without errors. Validates if a string is syntactically correct JSON
Observed, not estimated
631ms average. Fast in production.
LLM Output JSON Extractor is checked daily against the live service.
- Fastest day
- 500ms
- Slowest day
- 816ms
- 14-day trend
- Slowing+49%
Connect your client
One URL. Every client.
Activate the Connector, copy your link, and paste it into the client you already use. 3 capabilities arrive ready to run.
Preview access · not provider authentication
The vk_preview_* token belongs to Vinkius preview infrastructure. It lets Claude discover and display the capabilities of LLM Output JSON Extractor, so you can see the experience inside your AI.
It does not authenticate your account with LLM Output JSON Extractor. Actions requiring credentials or live account data may not run until you activate the Connector and authorize the service.
LLM Output JSON Extractor Connector
You're all set. Choose your MCP client and follow the setup instructions.
https://edge.vinkius.com/vk_preview_kdxskOFObqBjX4zZ3XIH72lIeNT65MbwKJYdv7jZ/mcpClaude Desktop
Follow the steps below to connect in seconds.
- 1In Claude Desktop, open Settings → Connectors.
- 2Click “Add custom connector” and paste the connector link above as the remote MCP server URL.
- 3Click Add and start a new chat — LLM Output JSON Extractor capabilities are ready to use.
{
"mcpServers": {
"llm-output-json-extractor-mcp": {
"url": "https://edge.vinkius.com/vk_preview_kdxskOFObqBjX4zZ3XIH72lIeNT65MbwKJYdv7jZ/mcp"
}
}
}
Claude
ChatGPT
Cursor
VS Code
Windsurf
Claude Code
JetBrains
Cline
Step-by-step instructions for each client are in the guide. How to connect
FAQ
Questions LLM Output JSON Extractor owners ask.
- 01
How does the extractor handle multiple JSON objects in one string?
The extractor scans from left to right and stops at the very first completed structure that passes structural validation.
- 02
Can I use this to check if a string is valid JSON?
Yes, you can use the validate_structure capability to confirm if a specific segment of text is syntactically correct and parsable.
- 03
What happens if the braces are unbalanced?
If the parser detects unbalanced braces, it will mark isValid as false and return an empty string for the extracted content.
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