LLM JSON Repair Utility Connector for AI agents.
3 live capabilities
Fix malformed JSON and broken data structures
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Why people use LLM JSON Repair Utility
Fix broken JSON syntax with LLM JSON Repair Utility
With this MCP, that cycle stops. Instead of fighting with syntax, you just hand the messy string to your agent and get back a clean, valid object. It turns a brittle process into a reliable one.
What Vinkius changes
You get valid, parsable JSON every time, even when the model's output is a mess.
Use it from Claude, ChatGPT, Cursor or another AI client you already have.
One account · 6,100+ Connectors
- Real-world use case 01
Fixing truncated model responses
When an agent hits a token limit and leaves a JSON object half-finished, use repair_json_string to close the brackets and save the data.
- Real-world use case 02
Parsing conversational data
When a model wraps its answer in 'Here is the data: .
- Real-world use case 03
Cleaning up messy LLM syntax
If a model uses single quotes or adds trailing commas, use repair_json_string to make it RFC compliant.
Complete set · 3capabilities
The complete LLM JSON Repair Utility capability set.
These are the exact actions your AI can choose when you ask it to work with LLM JSON Repair Utility.
01—03
3 capabilities in this set.
Part of 3 available through LLM JSON Repair Utility.
- 01 Capability
Extract json from text
Finds and pulls JSON objects out of conversational filler or markdown blocks. It's perfect for isolating data from a long chat response.
- 02 Capability
Repair json string
Fixes broken structures like missing braces or trailing commas. It turns invalid strings into valid JSON objects.
- 03 Capability
Validate json integrity
Checks if a JSON string meets strict syntax standards. Use this to confirm data is safe to parse before running your logic.
Set up in minutes
One URL. Then ask LLM JSON Repair Utility to work.
Claude and ChatGPT only need the Connector URL. Copy it once, add it in settings, and use LLM JSON Repair Utility from the conversation.
Choose your client
Live previewAdvanced clients IDE · CLI
Claude · Web + desktop
Connector URL · ready to paste
Streamable HTTPhttps://edge.vinkius.com/vk_preview_ZzkK2sMb63roNsDq7PgNLGQ6BP95NpuKBwpjhljI/mcp - Step 01
Open Connectors
In Claude Web or Claude Desktop, open Settings and choose Connectors.
- Step 02
Add the URL
Choose Add custom connector, name it LLM JSON Repair Utility, and paste the URL above.
- Step 03
Turn it on in chat
Select +, open Connectors, and enable LLM JSON Repair Utility for the conversation.
ChatGPT · Web + desktop
Connector URL · ready to paste
Streamable HTTPhttps://edge.vinkius.com/vk_preview_ZzkK2sMb63roNsDq7PgNLGQ6BP95NpuKBwpjhljI/mcp - Step 01
Open MCP settings
On desktop, open Settings and MCP servers. On web, open your workspace app or connector settings.
- Step 02
Add the URL
Choose Add server with Streamable HTTP, or create a custom MCP app, then paste the LLM JSON Repair Utility URL.
- Step 03
Save and start
Save the connection and enable LLM JSON Repair Utility in your conversation. Desktop may ask you to restart once.
Cursor · IDE configuration
Advanced setup
{
"mcpServers": {
"llm-json-repair-utility": {
"url": "https://edge.vinkius.com/vk_preview_ZzkK2sMb63roNsDq7PgNLGQ6BP95NpuKBwpjhljI/mcp"
}
}
}- Step 01
Open MCP Settings
Press Cmd+Shift+P (macOS) or Ctrl+Shift+P (Windows/Linux) → search "MCP Settings"
- Step 02
Add the server config
Paste the JSON configuration above into the mcp.json file that opens
- Step 03
Save the file
Cursor will automatically detect the new Connector
- Step 04
Start using LLM JSON Repair Utility
Open Agent mode in chat and ask: "Using LLM JSON Repair Utility, help me...". 3 tools available
VS Code Copilot · IDE configuration
Advanced setup
{
"mcpServers": {
"llm-json-repair-utility": {
"url": "https://edge.vinkius.com/vk_preview_ZzkK2sMb63roNsDq7PgNLGQ6BP95NpuKBwpjhljI/mcp"
}
}
}- Step 01
Create MCP config
Create a .vscode/mcp.json file in your project root
- Step 02
Add the server config
Paste the JSON configuration above
- Step 03
Enable Agent mode
Open GitHub Copilot Chat and switch to Agent mode using the dropdown
- Step 04
Start using LLM JSON Repair Utility
Ask Copilot: "Using LLM JSON Repair Utility, help me...". 3 tools available
Windsurf · IDE configuration
Advanced setup
{
"mcpServers": {
"llm-json-repair-utility": {
"url": "https://edge.vinkius.com/vk_preview_ZzkK2sMb63roNsDq7PgNLGQ6BP95NpuKBwpjhljI/mcp"
}
}
}- Step 01
Open MCP Settings
Go to Settings → MCP Configuration or press Cmd+Shift+P and search "MCP"
- Step 02
Add the server
Paste the JSON configuration above into mcp_config.json
- Step 03
Save and reload
Windsurf will detect the new server automatically
- Step 04
Start using LLM JSON Repair Utility
Open Cascade and ask: "Using LLM JSON Repair Utility, help me...". 3 tools available
Cline · IDE configuration
Advanced setup
{
"mcpServers": {
"llm-json-repair-utility": {
"url": "https://edge.vinkius.com/vk_preview_ZzkK2sMb63roNsDq7PgNLGQ6BP95NpuKBwpjhljI/mcp"
}
}
}- Step 01
Open Cline MCP Settings
Click the Connectors icon in the Cline sidebar panel
- Step 02
Add remote server
Click "Add Connector" and paste the configuration above
- Step 03
Enable the server
Toggle the server switch to ON
- Step 04
Start using LLM JSON Repair Utility
Ask Cline: "Using LLM JSON Repair Utility, help me...". 3 tools available
Claude Code · Terminal command
Advanced setup
claude mcp add llm-json-repair-utility --transport http "https://edge.vinkius.com/vk_preview_ZzkK2sMb63roNsDq7PgNLGQ6BP95NpuKBwpjhljI/mcp"- Step 01
Install Claude Code
Run npm install -g @anthropic-ai/claude-code if not already installed
- Step 02
Add the Connector
Run the command above in your terminal
- Step 03
Verify the connection
Run claude mcp to list connected servers, or type /mcp inside a session
- Step 04
Start using LLM JSON Repair Utility
Ask Claude: "Using LLM JSON Repair Utility, show me...". 3 tools are ready
Where the request belongs
Work LLM JSON Repair can move forward.
This is for developers and data engineers who are tired of their automation scripts crashing because an LLM forgot a closing bracket.
Backend Engineer
Fixing API responses that rely on model-generated structured data.
Data Scientist
Cleaning up messy datasets extracted from unstructured text logs.
AI Automation Engineer
Ensuring agentic workflows don't fail due to syntax errors in capability calls.
Build the capability set
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Bring your own AI
Change the model, client or framework. Keep LLM JSON Repair connected.
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Claude -
ChatGPT -
Gemini -
Cursor -
VS Code -
Windsurf -
ZCode -
Cline -
Zed -
Continue -
Kiro -
Roo Code -
Zencoder -
Goose -
Void -
Augment Code -
Amp -
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Pieces -
Sourcegraph Cody -
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Amazon Q -
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Raycast -
Jan -
LM Studio -
AnythingLLM -
Open WebUI -
Msty -
Cherry Studio -
LibreChat -
TypingMind -
Chorus -
5ire -
n8n -
LangChain -
LlamaIndex -
CrewAI -
Vercel AI SDK
Before you connect
Questions about LLM JSON Repair.
The practical details behind the request, access and result.
How can I fix broken JSON from my AI agent using LLM JSON Repair Utility?
You can use the repair capability to automatically fix missing brackets, unquoted keys, or trailing commas, turning invalid text into valid JSON.
Can LLM JSON Repair Utility pull data out of a long chat response?
Yes, it has a specific capability to find and extract JSON objects from within larger blocks of conversational text or markdown.
Will LLM JSON Repair Utility add fake data to my JSON?
No, it uses a deterministic state-machine approach to fix structural issues without hallucinating or inventing new data fields.
How do I check if a JSON string is valid with LLM JSON Repair Utility?
You can use the validation capability to check if a string meets strict RFC 8259 standards before you attempt to parse it in your code.
Does LLM JSON Repair Utility work with Claude or Cursor?
Yes, it works with any MCP-compatible client, including Claude, Cursor, and Windsurf.
How does this differ from using an LLM to fix JSON?
Unlike probabilistic LLMs, this server uses a deterministic state machine. This means it only fixes structural issues like missing brackets or trailing commas without inventing or changing the actual data content.
Can I extract JSON from a long chat response?
Yes, you can use the extract_json_from_text capability to locate and isolate the JSON object or array within a larger block of conversational text.
What happens if the JSON is truncated due to token limits?
The repair_json_string capability tracks the nesting depth of all open braces and brackets and automatically appends the necessary closing characters to restore structural integrity.
One connection away
Give your agent a direct line to LLM JSON Repair.
Connect LLM JSON Repair once. Keep it beside 6,100+ managed Connectors when the next task needs more.
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