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TinyPNG MCP by usefulapi

by usefulapi.io · remote · no sign-in to list tools · v1.3.3 · published by io.usefulapi

Compress, resize and convert images with TinyPNG by URL, and check this month's compression count.

Changes · 2
CompareRegistry entry

4 tools: 2 change things and 2 only read.

Scanned Oct 21, 2026

No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http tinypng https://tinypng.usefulapi.io/mcp

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

4 tools

Changes things 2Claude Code: ask
  • tinypng_compress_imageWRITE (uses quota): ask TinyPNG (Tinify) to fetch a public image by URL and compress it (JPEG, PNG, WebP, AVIF or JPEG XL).No findings

    Why it is in this group

    • The description's first verb is "write": a word for a change.
    Description, as the server wrote it
    WRITE (uses quota): ask TinyPNG (Tinify) to fetch a public image by URL and compress it (JPEG, PNG, WebP, AVIF or JPEG XL). Returns the output_url (Tinify's Location address of the compressed image), the compressed size and type, the savings when the input size is known, and the Compression-Count header (compressions used this month). The image is stored by Tinify for about 48 hours; output_url needs your API key, so use tinypng_download_image to get the bytes and tinypng_transform_image to resize, convert or keep metadata. Each compression counts against the monthly quota of your Tinify API key (the free plan includes 500 per month); resizing and converting count one extra compression each. POST /shrink.

    Annotations the server declares

    • title: Compress an image from a URL
    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: true
  • tinypng_transform_imageWRITE (uses quota): apply a resize, a format conversion and/or metadata preservation to an image compressed earlier (the output_url from tinypng_compress_image, valid about 48 hour…No findings

    Why it is in this group

    • The description's first verb is "write": a word for a change.
    Description, as the server wrote it
    WRITE (uses quota): apply a resize, a format conversion and/or metadata preservation to an image compressed earlier (the output_url from tinypng_compress_image, valid about 48 hours). Returns the resulting type, byte size, width, height and Compression-Count; the image itself is returned too when include_image is true and it is under 1 MB. Resize: method scale (give width OR height), or fit / cover / thumb (give width AND height); images are never scaled up. Convert: one or more of image/webp, image/jpeg, image/png, image/avif, image/jxl (several = the smallest is returned) or */* (the smallest of WebP, JPEG, PNG); converting a transparent image to JPEG needs a background colour. Preserve: copyright, creation, location (location is JPEG only) keeps that metadata, which makes the file slightly larger. Each call is a fresh request: resize and convert each count one extra compression on your monthly Tinify quota, preserve is free. Tinify returns the bytes only (no new URL), so only include_image gives you the transformed file, and only when it is under 1 MB. POST /output/{id}.

    Annotations the server declares

    • title: Resize, convert or keep metadata of a compressed image
    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: true
Only reads 2Claude Code: allow
  • tinypng_download_imageFetch the compressed image of an earlier tinypng_compress_image (its output_url, valid about 48 hours) and return it as an image with its type, byte size, width and height.No findings

    Why it is in this group

    • The description's first verb is "fetch": a word for reading.
    Description, as the server wrote it
    Fetch the compressed image of an earlier tinypng_compress_image (its output_url, valid about 48 hours) and return it as an image with its type, byte size, width and height. Images over 1 MB are described but not returned inline. Downloading does not use extra compression quota. GET /output/{id}.

    Annotations the server declares

    • title: Download a compressed image
    • readOnlyHint: true
    • destructiveHint: false
    • openWorldHint: true
  • tinypng_get_usageHow many compressions your Tinify API key has used this calendar month (the Compression-Count header), and whether the key is valid.No findings

    Why it is in this group

    • The name "tinypng_get_usage" says "get": a word for reading.
    Description, as the server wrote it
    How many compressions your Tinify API key has used this calendar month (the Compression-Count header), and whether the key is valid. The check sends an empty request that Tinify refuses, so nothing is compressed and no quota is used. Compare with your Tinify plan (the free plan includes 500 per month). POST /shrink with no body.

    Annotations the server declares

    • title: Get compression usage this month
    • readOnlyHint: true
    • destructiveHint: false
    • openWorldHint: true

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 1.3.3. Values in angle brackets are yours to fill in.

claude mcp add --transport http tinypng https://tinypng.usefulapi.io/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__tinypng__tinypng_download_image",
      "mcp__tinypng__tinypng_get_usage"
    ],
    "ask": [
      "mcp__tinypng__tinypng_compress_image",
      "mcp__tinypng__tinypng_transform_image"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as tinypng. Review it before you use it.