jsonshim-mcp

A one-file MCP stdio server that provides two tools, recover_json and classify_json_failure, to handle cases where an LLM returns malformed JSON instead of valid output. It uses only the standard library, requires no installation or network calls, and is released under CC0 1.0.

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Package and access

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Vendor evidenceLocal stdioSource reviewed; not executedOperated by Toolkit Labs

Vendor documentation

What you can do with it

Recover valid JSON from malformed LLM responses
Classify the specific type of JSON failure in model output
Integrate JSON recovery into agent workflows via stdio

Source and maintenance

Vendor evidenceRegistry 1.0.2

mcp-registry: org.toolkitlabs/jsonshim@1.0.2 Project website

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

jsonshim-mcp 1.0.2

npm

jsonshim-mcp package definition

{
  "version": "1.0.2",
  "transport": "stdio",
  "identifier": "jsonshim-mcp",
  "registryType": "npm",
  "registryBaseUrl": "https://registry.npmjs.org"
}

Tools

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No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

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Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.

Cursor configuration

{
  "mcpServers": {
    "jsonshim-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "jsonshim-mcp@1.0.2"
      ]
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.

Cline configuration

{
  "mcpServers": {
    "jsonshim-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "jsonshim-mcp@1.0.2"
      ]
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.

VS Code configuration

{
  "servers": {
    "jsonshim-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "jsonshim-mcp@1.0.2"
      ]
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.

Claude Desktop configuration

{
  "mcpServers": {
    "jsonshim-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "jsonshim-mcp@1.0.2"
      ]
    }
  }
}

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