MCP server

JsonMend

dev.workers.mike-tusa.jsonmend/jsonmend

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

Repair broken JSON from LLM output and validate it against a JSON Schema.

Website

At a glance

Type

MCP server

Publisher

Not verified

Status

Working at last check

Tools

2

Token cost

About 1,000 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 jsonmend https://jsonmend.mike-tusa.workers.dev/mcp

Claude Desktop

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

Codex (config.toml)

[mcp_servers.jsonmend]
url = "https://jsonmend.mike-tusa.workers.dev/mcp"

Gemini CLI

{"mcpServers":{"jsonmend":{"httpUrl":"https://jsonmend.mike-tusa.workers.dev/mcp"}}}

Cursor

{"mcpServers":{"jsonmend":{"url":"https://jsonmend.mike-tusa.workers.dev/mcp"}}}

VS Code

{"servers":{"jsonmend":{"type":"http","url":"https://jsonmend.mike-tusa.workers.dev/mcp"}}}

Antigravity

agy mcp add jsonmend https://jsonmend.mike-tusa.workers.dev/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":"jsonmend","server_url":"https://jsonmend.mike-tusa.workers.dev/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"jsonmend","server_url":"https://jsonmend.mike-tusa.workers.dev/mcp"}

Tools

• repair_json ~549 tokens
  Turn broken or messy JSON text into valid JSON. Strips Markdown code fences and prose before/after the JSON, removes comments and trailing commas, converts single/curly quotes, quotes unquoted keys, maps Python None/True/False, inserts missing commas, closes truncated strings/arrays/objects, and wra
• validate_json ~451 tokens
  Check JSON against a JSON Schema and get every error with its JSON Pointer path. Send the JSON either as text ("input"; broken text is repaired first, and the fixes are listed) or as an already-parsed value ("data"). Optional coerce converts "42" → 42, "true" → true, etc. toward the schema's types b

Browse

• Converting to Markdown
• Calling other AI models

Related MCP servers

• Jsonaut
  Repair malformed JSON from LLM/agent output; optional JSON Schema coercion. Free + x402 paid.
• NOVA
  Paid NOVA research, company intelligence, and output recovery for agents.
• Diogenes Dev & Data Utilities MCP
  JSON healing, O(n) ReDoS defense, XML prompt compilation, and schema verification tools.
• FixMyJSON
  Repair broken LLM JSON and check it against a JSON Schema. Flags cut-off output. Free trial.
• JSONShelf
  Deterministic JSON repair, validate, example-gen, schema-coerce for agents. Zero LLM, sub-10ms.
• Llm Output Quality Monitor
  Cloudflare Workers MCP server: llm-output-quality-monitor
• VerifyLite
  Pay-per-call website safety and URL checks for AI agents. USDC on Base via x402, no API keys.
• BOZOS
  Exact source text, not summaries: check citations and quotes in one call; read pages and PDFs.

Badge for your README

[![AptLynx](https://aptlynx.net/badge/dev.workers.mike-tusa.jsonmend/jsonmend.svg)](https://aptlynx.net/servers/dev.workers.mike-tusa.jsonmend/jsonmend)

Listing text is written by the maker; AptLynx lists tools and does not vouch for them. Find another tool · Browse by topic · For agents