OpenFormatDB

Name: OpenFormatDB
Author: openformatdb

by openformatdbversion 0.3.0i★ –iRuns on your computer

Registry nameorg.openformatdb/openformatdb

Install

Overview

Description from the maker (original English)

Identify a file, find open tools for its format, convert it locally with WebAssembly.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Other

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
The registry lists no key to fill in.

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "openformatdb": {
      "command": "npx",
      "args": [
        "-y",
        "@openformatdb/mcp"
      ]
    }
  }
}

Run this in your terminal

claude mcp add openformatdb -- npx -y @openformatdb/mcp

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "openformatdb": {
      "command": "npx",
      "args": [
        "-y",
        "@openformatdb/mcp"
      ]
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

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

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 6, 2026

✓ Pass
Maker matches the repo
The registry name was verified against the domain openformatdb.org (the registry checks domain ownership)
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Otheri

More stars than 0% of the other 32380 servers in this category
Published to the registry more recently than 74% of the other 32380 servers in this category
Basic checks equal to or better than 100% of the other 32380 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is OpenFormatDB safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.3.0) reached the registry 12 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: Spec Driven Development, Remote Desktop Commander, Dechonet MCP

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README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

@openformatdb/mcp

MCP server for OpenFormatDB: before an agent writes a parser or reverse engineers a file, it asks what the file is, which software already reads, writes and converts it, and how far the format is documented.

tool	what it does
`identify_file(magic_hex?, tail_hex?, extension?, mime?)`	candidate formats, ranked: full PRONOM signature (with priorities), prefix, MIME type, extension. The agent reads the bytes itself (`xxd -p -l 1024 file`, `tail -c 512 file \	xxd -p`); the file never leaves the machine
`lookup_format(id \	puid \	wikidata \	mime)`	full record: identifiers, software (open source first, inherited from the family when marked `via`), grammars, specification, family and versions, live claims, advice
`search_formats(query, category?, status?)`	ranked matches by name, alias, extension, MIME, PUID or QID
`find_conversion(from, to?)`	cheapest chains of open tools from one format to another (lossless first), each step with its command and what is lost; formats as ids or extensions. Steps with an `engine` run with `convert_file`
`convert_file(path, to?, output?)`	converts a file of this machine with open-source converters compiled to WebAssembly: ImageMagick, resvg, FFmpeg, Pandoc, 7-Zip, GDAL, Assimp. Nothing is uploaded; each engine (2 to 59 MB) is downloaded once on first use, pinned and SHA-256 checked, into `~/.cache/openformatdb/engines` (`OFDB_ENGINES_DIR`). Without `to`, lists what the file can become. Writes next to the input and never overwrites
`list_sources()`	aggregated sources with counts, licences and snapshot dates
`claim_format(id \	name+category, who, contact, scope, days?)`	says you are documenting a format (up to 90 days), so nobody duplicates the work
`publish_findings(id, patch, release_claim_of?)`	merges structure, grammars, tools, conversions, spec, identifiers, verification; status only moves forward

convert_file is the only tool that reaches the network (an engine's first download) and writes outside the checkout (the converted file). The two write tools change data/formats/ .yaml in the checkout and print the git commands to open a pull request; they never run git. Text is screened against POLICY.md (no DRM removal, no keys, no copies of paywalled standards).

Install

npx -y @openformatdb/mcp

claude mcp add openformatdb -- npx -y @openformatdb/mcp # Claude Code

Release

Bump the version in package.json, server.json and src/server.ts, then run the Release MCP server workflow: it tests, publishes to npm (trusted publishing) and to the MCP Registry as org.openformatdb/openformatdb (secret MCP_REGISTRY_PRIVATE_KEY, whose public half is served at https://openformatdb.org/.well-known/mcp-registry-auth).

Run it

Without a checkout it reads the static API of openformatdb.org (read-only; OFDB_API_URL points elsewhere). From a checkout of the repository it reads the data files and can write:

npm install

npm run mcp # stdio; data from this checkout OFDB_REPO=/path/to/checkout npm run mcp

Claude Code: claude mcp add openformatdb -- node /path/to/openformatdb/packages/mcp/src/server.ts

Needs Node 22.18 or later (TypeScript sources run directly).

OpenFormatDB

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Otheri

Common questions

Alternatives

Spec Driven Development

Remote Desktop Commander

Dechonet MCP

README from the maker

@openformatdb/mcp

Install

Release

Run it