# TinyPNG MCP by usefulapi (remote · tinypng.usefulapi.io)

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

- Trust score: 64/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-10-17

## Components

- remote · `tinypng.usefulapi.io`: 64/100 (this document), [markdown](https://verifymcp.io/servers/io-usefulapi-tinypng/tinypng.md), [page](https://verifymcp.io/servers/io-usefulapi-tinypng/tinypng)

## Channel facts

- Endpoint: `https://tinypng.usefulapi.io/mcp`
- Transports: `streamable-http`
- Auth: `required`
- Version: `1.0.0`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-10-17.

- **Endpoint Security**: 78/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation is enforced on tool calls, advertised via RFC 9728 protected-resource metadata. Discovery is public, which costs nothing: no tool can be invoked without a token.
  - HTTPS enforcement could not be verified: the plaintext port redirected somewhere other than https, so enforcement is unproven.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
  - The authorisation server offers only Dynamic Client Registration (RFC 7591), which MCP 2026-07-28 deprecated in favour of Client ID Metadata Documents.
- **Transport & Reachability**: 0/100
  - Transport check failed: declared streamable-http, but the endpoint redirected instead of responding directly.
- **Schema Quality & AI Usability**: 78/100
  - 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 1119 tokens (~279/item across 4 items; 4 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 17/100
  - Stability observed for 5 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 4 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 5 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 60/100
  - Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28.

## Install

### How do I install the TinyPNG MCP by usefulapi server?

TinyPNG MCP by usefulapi is a hosted endpoint at https://tinypng.usefulapi.io/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

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

### Cursor

```json
{
  "mcpServers": {
    "io-usefulapi-tinypng": {
      "url": "https://tinypng.usefulapi.io/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "io-usefulapi-tinypng": {
      "type": "http",
      "url": "https://tinypng.usefulapi.io/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.io-usefulapi-tinypng]
url = "https://tinypng.usefulapi.io/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "io-usefulapi-tinypng": {
      "type": "remote",
      "url": "https://tinypng.usefulapi.io/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add io-usefulapi-tinypng --url 'https://tinypng.usefulapi.io/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  io-usefulapi-tinypng:
    url: "https://tinypng.usefulapi.io/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "io-usefulapi-tinypng": {
      "Transport": "http",
      "Url": "https://tinypng.usefulapi.io/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add io-usefulapi-tinypng -t streamable-http -u 'https://tinypng.usefulapi.io/mcp'
```

### Other

```json
{
  "mcpServers": {
    "io-usefulapi-tinypng": {
      "type": "http",
      "url": "https://tinypng.usefulapi.io/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-10-17 (score 64, +1)

No change was recorded against any check on this day. Stability & Change Management went from 13 to 17. That category is still filling its 30-day observation window: 4 days of observed history at the previous scan, 5 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-14 (score 63, +3)

- [security] The server rewrote its instructions, which are the text every model session reads
- [functional] The server now declares the “prompts” capability
- [functional] First check of Schema quality: 100
- [functional] New prompt “getting_started”
- [functional] Server version: 1.0.0 → 1.1.0

### 2026-10-13 (score 60, +1)

- [functional improvement] Stability: unverified → 0.03

### 2026-10-12 (score 59)

First indexed and scored.

## MCP tools (4)

### `tinypng_compress_image` (~206 tokens)

Compress an image from a URL

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.

Input parameters:

- `url` (string, required): Public http(s) URL of the image to compress. Tinify's servers fetch it, so it must be reachable from the internet.

### `tinypng_transform_image` (~481 tokens)

Resize, convert or keep metadata of a compressed image

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}.

Input parameters:

- `background` (string): Background for transparent areas when converting to a type without transparency (JPEG): "#rrggbb", "white" or "black". Only with convert_to.
- `convert_to` (array): Target type(s), e.g. ["image/webp"]. Several = the smallest result is returned. ["*/*"] = the smallest of WebP, JPEG, PNG.
- `include_image` (boolean): Also return the resulting image (only when it is under 1 MB). Default false: sizes only.
- `output_url` (string, required): The output_url returned by tinypng_compress_image (https://api.tinify.com/output/<id>), or just the id. Outputs are kept by Tinify for about 48 hours.
- `preserve` (array): Metadata to keep: copyright, creation, location (JPEG only).
- `resize_height` (integer): Target height in pixels.
- `resize_method` (string): Resize method. scale: width or height; fit/cover/thumb: width and height.
- `resize_width` (integer): Target width in pixels.

### `tinypng_download_image` (~127 tokens)

Download a compressed image

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}.

Input parameters:

- `output_url` (string, required): The output_url returned by tinypng_compress_image (https://api.tinify.com/output/<id>), or just the id. Outputs are kept by Tinify for about 48 hours.

### `tinypng_get_usage` (~84 tokens)

Get compression usage this month

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.

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/io-usefulapi-tinypng/tinypng#diagnostics

## Score history

- 2026-10-17: 64
- 2026-10-16: 63
- 2026-10-15: 63
- 2026-10-14: 63
- 2026-10-13: 60
- 2026-10-12: 59

## Common questions

### What is the TinyPNG MCP by usefulapi server?

TinyPNG MCP by usefulapi is listed in the public MCP registry as io.usefulapi/tinypng. Compress, resize and convert images with TinyPNG by URL, and check this month's compression count. This page covers its hosted endpoint (https://tinypng.usefulapi.io/mcp).

### Is the TinyPNG MCP by usefulapi server safe to use?

TinyPNG MCP by usefulapi scores 64 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the TinyPNG MCP by usefulapi server expose?

TinyPNG MCP by usefulapi exposes 4 tools: tinypng_compress_image, tinypng_transform_image, tinypng_download_image, tinypng_get_usage. Their descriptions and schemas cost roughly 898 tokens of context every time the server is loaded.

### Does the TinyPNG MCP by usefulapi server require authentication?

Yes. TinyPNG MCP by usefulapi asked us for credentials when we connected, so you will need to authorise it in your MCP client before it can do anything.

### Is the TinyPNG MCP by usefulapi server still maintained?

TinyPNG MCP by usefulapi is still listed as active in the MCP registry. We last reached this channel on 17 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://tinypng.usefulapi.io/mcp
- Repository: https://github.com/m190/usefulapi-mcp
- Website: https://usefulapi.io/tinypng/
- Changelog RSS feed: https://verifymcp.io/servers/io-usefulapi-tinypng/tinypng.xml
- Changelog JSON feed: https://verifymcp.io/servers/io-usefulapi-tinypng/tinypng.json
- HTML version of this page: https://verifymcp.io/servers/io-usefulapi-tinypng/tinypng