JSON to Types MCP server

• json_to_typesFree

  Convert a JSON sample into TypeScript interfaces and a matching Zod schema, and report where a single sample cannot establish the real type. Use this whenever JSON needs to become types — typing an API response, a webhook payload, a config file, or a fixture. Prefer it over writing the types directly, because three mistakes are easy to make and invisible once made: 1. ARRAYS. Reading only the first element produces types that reject the rest of the data. This merges every element into a union. 2. NULL VS ABSENT. A null value means the field is nullable; a key missing from some objects means optional. Different types, routinely conflated. 3. EMPTY CONTAINERS. Nothing can be inferred from [] or {}. This emits unknown and says so instead of inventing a plausible shape. It is also far cheaper in output tokens than generating types inline for a large payload, and the result is deterministic. Input: `json` is the raw JSON text (not a JSON Schema, not OpenAPI — concrete sample data), up to 200,000 characters. `rootName` optionally names the top-level interface and defaults to "Root". Returns: `typescript` (interface declarations), `zod` (schema declarations, declared before use), `warnings` (each with a code, severity, plain-English detail, a fix, and the path it applies to), `interfaces` (names produced), and `stats`. Read the warnings before trusting the output — they are the part a model generating types inline cannot give you.

• –Code scanremote-only server, no package to scann/a
• Live reliabilityremote reachable in 1466ms20/20
• Tool poisoning1 tool descriptions checked15/15
• Auth qualityopen endpoint, read-only tools10/15
• Maintenancerepository not readable: repo not found3/15
• Maintainer identityverified namespace with website, no repo4/10

JSON to Types: common questions

Is JSON to Types MCP server safe?

With care: it is graded C, so read the findings first (69/100). Read the JSON to Types safety report

How do I install JSON to Types?

It runs remotely at json-to-types.gumballtools.com. Add it to Claude Code, Claude Desktop or Cursor with the snippets above, or call it through the mcp.market gateway without installing anything.

Does JSON to Types need an API key?

Not as far as the registry entry and our scan can tell: no credentials are declared or required.

Is JSON to Types maintained?

The latest release is v0.1.0.

Is JSON to Types up?

100% of our last 6 checks got an answer. We check remote servers about four times a day.