MCP For Claude Marketplace
LLM JSON Extractor

LLM JSON Extractor MCP Connector for Claude

A+

Isolates valid JSON objects from messy LLM text outputs.

3 tools Official Updated Oct 1, 2026 Official Vinkius Partner
More Details Connect to Claude

This MCP server provides specialized tools to extract structured JSON payloads from unstructured, conversational, or markdown-formatted Large Language Model (LLM) responses. It uses deterministic bracket-matching to identify the boundaries of the first valid JSON object or array, even when surrounded by conversational noise. Use extract_first_json_payload to find the payload, verify_json_integrity to check syntax, and get_extraction_metadata to retrieve character offsets and markdown wrapper information.

jsonllmparsingextractiondata-processing

3 tools expose this connector's capabilities to your AI agent.

verify_json_integrity

Validates if a specific substring is a syntactically correct JSON structure

extract_first_json_payload

Attempts to find and isolate the first valid JSON object or array within a raw string

get_extraction_metadata

Calculates the location and length properties of a detected JSON payload

See how to talk to your AI agent using LLM JSON Extractor.

Extract the JSON from this text: Here is your data: {"id": 123, "status": "ok"} hope this helps!

{"id": 123, "status": "ok"}

Find the JSON in this markdown: ```json [1, 2, 3] ```

[1, 2, 3]

Is this valid JSON: {"key": "value",}

No, it is invalid due to a trailing comma.

The server uses a scan-based approach with a counter to track opening and closing braces and brackets, ensuring nested structures are fully captured.

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