loremfile MCP server

loremfile

Free, CC0, hotlink-friendly sample files for every file type. Lorem Picsum, but for PDFs, images, audio, video, office documents, data files, archives, fonts, text encodings, raw byte blobs and deliberately malformed edge cases.

https://loremfile.dev/pdf/a4-3pages.pdf
https://loremfile.dev/bin/10mb.bin
https://loremfile.dev/mp4/720p-5s.mp4
https://loremfile.dev/edge/jpg-truncated-50pct.jpg

No ads, no accounts, no rate-limit surprises, no attribution required. Open CORS, byte-range support, one-year immutable caching, and a machine-readable manifest.json with SHA-256 hashes for every file.

228 files across 78 formats plus the edge/ set are live, at catalog version 1.2.0. The specification lives in docs/.

Canonical host

The canonical host is https://loremfile.dev.

This README is the out-of-band pointer: if loremfile.dev is ever unavailable or moves, the current canonical host is stated here first. Do not rely on any other mirror.

What you can rely on

they are; a fix is a new path, and the old entry records supersededBy. A file may be withdrawn for legal reasons, and the manifest then keeps a tombstone for it. There is no promise of availability; see the terms.

• The bytes at a published path do not change. Hash, byte count and MIME type stay as

30 requests per second per client (the edge rate-limits at 300 requests / 10 s per IP).

• Hotlinking is welcome. That is what this is for. Please keep automated traffic under

• No tracking cookies, no analytics scripts, no accounts.

For agents and CI

sha256, MIME type, tags and format-specific properties.

• /llms.txt: what this service is, in one file.
• /manifest.json: every fixture with path, bytes,

sha256sum -c.

• /sha256sums.txt: verify downloads with

• /{format}/index.json: one format at a time.

GitHub Action

Pull fixtures into a workflow and check each one against its sha256 in the manifest:

- uses: kumarprabhashanand/loremfile/action@action-v1
  with:
    paths: pdf/minimal.pdf mp4/720p-5s.mp4
    formats: svg

It writes to loremfile-fixtures/ and outputs dir and count. A file whose bytes do not match the manifest fails the step and names the file. catalog-version: "1.2.0" refuses to run if loremfile.dev has moved on.

The action is shell only and talks to nothing but loremfile.dev. It downloads one file at a time with a pause between them and backs off on a 429, because the published rate limit applies to it like any other client. Linux and macOS runners only: it needs sha256sum or shasum, and Windows is not supported rather than half-supported.

action-v1 is a major tag that moves as the action changes; it is deliberately not a v* release tag, because those name a catalog version and are frozen once pushed. Pinning a commit SHA works too and is the strictest option.

Command-line clients

loremfile on PyPI (Python 3.11 or newer) and loremfile on npm take named files or a whole format, and write a file only after checking it against its sha256:

npx loremfile get --format pdf
loremfile get pdf/minimal.pdf mp4/720p-5s.mp4    # after pip install loremfile

MCP server

Both packages also run a Model Context Protocol server over stdio, with three read-only tools: listfixtures, describefixture and verify_file. With Node:

{ "mcpServers": { "loremfile": { "command": "npx", "args": ["-y", "loremfile", "mcp"] } } }

With Python, without an install:

{ "mcpServers": { "loremfile": { "command": "uvx", "args": ["loremfile", "mcp"] } } }

Shortened. The full README is on GitHub.