MCP server

FixMyJSON

io.github.tonbifun/fixmyjson

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

Repair broken LLM JSON and check it against a JSON Schema. Flags cut-off output. Free trial.

Website

At a glance

Type

MCP server

Publisher

Not verified

Status

Working at last check

Tools

1

Token cost

About 239 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http fixmyjson https://fixmyjson-api.onrender.com/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.fixmyjson]
url = "https://fixmyjson-api.onrender.com/mcp"

Gemini CLI

{"mcpServers":{"fixmyjson":{"httpUrl":"https://fixmyjson-api.onrender.com/mcp"}}}

Cursor

{"mcpServers":{"fixmyjson":{"url":"https://fixmyjson-api.onrender.com/mcp"}}}

VS Code

{"servers":{"fixmyjson":{"type":"http","url":"https://fixmyjson-api.onrender.com/mcp"}}}

Antigravity

agy mcp add fixmyjson https://fixmyjson-api.onrender.com/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"fixmyjson","server_url":"https://fixmyjson-api.onrender.com/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"fixmyjson","server_url":"https://fixmyjson-api.onrender.com/mcp"}

Tools

• repair_json ~239 tokens
  Repair malformed JSON produced by an LLM or agent (trailing commas, missing quotes, code fences, chatty text around the JSON, <think> blocks, double-encoded JSON) and check the result against a JSON Schema. Returns the repaired value, what was changed, what could not be fixed (unresolved_errors), an

Browse

• GitHub tools
• GitHub and code hosting
• Calling other AI models

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