# App-Kit (remote · mcp.app-kit.dev)

SEO audit (400 checks), text readability and grammar check, PDF to images, image conversion.

- Trust score: 79/100 (medium)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- remote · `mcp.app-kit.dev`: 79/100 (this document), [markdown](https://verifymcp.io/servers/app-kit-dev-mcp/mcp.md), [page](https://verifymcp.io/servers/app-kit-dev-mcp/mcp)

## Channel facts

- Endpoint: `https://mcp.app-kit.dev/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `0.1.3`

## 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 2026-11-05.

- **Endpoint Security**: 63/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS enforcement could not be verified: the plaintext port answered with HTTP 406, which proves neither a plaintext path nor enforcement.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 65/100
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 1859 tokens (~185/item across 10 items; 10 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 100/100
  - No destabilizing schema changes in the last 30 days.
- **Tool Coverage**: 99/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 98% of tool parameters carry a description.
  - Structured output schemas are declared (100% of tools); any adoption earns full credit.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 10 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 11 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a current MCP spec version (2026-07-28).

## Install

### How do I install the App-Kit MCP server?

App-Kit is a hosted endpoint at https://mcp.app-kit.dev/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 app-kit-dev-mcp 'https://mcp.app-kit.dev/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "app-kit-dev-mcp": {
      "url": "https://mcp.app-kit.dev/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "app-kit-dev-mcp": {
      "type": "http",
      "url": "https://mcp.app-kit.dev/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.app-kit-dev-mcp]
url = "https://mcp.app-kit.dev/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "app-kit-dev-mcp": {
      "type": "remote",
      "url": "https://mcp.app-kit.dev/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add app-kit-dev-mcp --url 'https://mcp.app-kit.dev/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  app-kit-dev-mcp:
    url: "https://mcp.app-kit.dev/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "app-kit-dev-mcp": {
      "Transport": "http",
      "Url": "https://mcp.app-kit.dev/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add app-kit-dev-mcp -t streamable-http -u 'https://mcp.app-kit.dev/mcp'
```

### Other

```json
{
  "mcpServers": {
    "app-kit-dev-mcp": {
      "type": "http",
      "url": "https://mcp.app-kit.dev/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.

### 2026-11-04 (score 79, +1)

- [security] Stability: 0.97 → pass

### 2026-11-02 (score 78, +1)

No change was recorded against any check on this day. Stability & Change Management went from 90 to 93. That category is still filling its 30-day observation window: 27 days of observed history at the previous scan, 28 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-31 (score 77, +1)

No change was recorded against any check on this day. Stability & Change Management went from 83 to 87. That category is still filling its 30-day observation window: 25 days of observed history at the previous scan, 26 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-28 (score 76, +1)

No change was recorded against any check on this day. Stability & Change Management went from 73 to 77. That category is still filling its 30-day observation window: 22 days of observed history at the previous scan, 23 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-26 (score 75, 0)

- [security] The server rewrote its instructions, which are the text every model session reads
- [security] Tool “conversion_status” rewrote its description, which is the text the model reads
- [security] Tool “create_upload” rewrote its description, which is the text the model reads
- [security] Tool “image_convert” rewrote its description, which is the text the model reads
- [security] Tool “images_to_pdf” rewrote its description, which is the text the model reads
- [security] Tool “pdf_to_images” rewrote its description, which is the text the model reads
- [security] Tool “quota_status” rewrote its description, which is the text the model reads
- [security] Tool “seo_audit_fast” rewrote its description, which is the text the model reads
- [security] Tool “seo_audit_status” rewrote its description, which is the text the model reads
- [security] Tool “text_check” rewrote its description, which is the text the model reads
- [functional] Schema quality: excellent → good
- [functional] New tool “image_compress”
- [cosmetic] “conversion_status” added an optional parameter “lang”
- [cosmetic] “create_upload” added an optional parameter “lang”
- [cosmetic] “image_convert” added an optional parameter “lang”
- [cosmetic] “images_to_pdf” added an optional parameter “lang”
- [cosmetic] “pdf_to_images” added an optional parameter “lang”
- [cosmetic] “quota_status” added an optional parameter “lang”
- [cosmetic] “seo_audit_status” added an optional parameter “lang”
- [cosmetic] “text_check” added an optional parameter “response_lang”
- [cosmetic] “conversion_status” reworded the description of “handle”
- [cosmetic] “create_upload” reworded the description of “content_type”
- [cosmetic] “create_upload” reworded the description of “filename”
- [cosmetic] “create_upload” reworded the description of “size”
- [cosmetic] “image_convert” reworded the description of “data_base64”
- [cosmetic] “image_convert” reworded the description of “max_dim”
- [cosmetic] “image_convert” reworded the description of “quality”
- [cosmetic] “image_convert” reworded the description of “source_url”
- [cosmetic] “image_convert” reworded the description of “target_format”
- [cosmetic] “image_convert” reworded the description of “upload_id”
- [cosmetic] “images_to_pdf” reworded the description of “page_size”
- [cosmetic] “images_to_pdf” reworded the description of “source_urls”
- [cosmetic] “images_to_pdf” reworded the description of “upload_ids”
- [cosmetic] “pdf_to_images” reworded the description of “data_base64”
- [cosmetic] “pdf_to_images” reworded the description of “dpi”
- [cosmetic] “pdf_to_images” reworded the description of “first_page”
- [cosmetic] “pdf_to_images” reworded the description of “format”
- [cosmetic] “pdf_to_images” reworded the description of “last_page”
- [cosmetic] “pdf_to_images” reworded the description of “source_url”
- [cosmetic] “pdf_to_images” reworded the description of “upload_id”
- [cosmetic] “seo_audit_fast” reworded the description of “lang”
- [cosmetic] “seo_audit_fast” reworded the description of “url”
- [cosmetic] “seo_audit_status” reworded the description of “handle”
- [cosmetic] “text_check” reworded the description of “lang”
- [cosmetic] “text_check” reworded the description of “layers”
- [cosmetic] “text_check” reworded the description of “text”
- [cosmetic] Tool “conversion_status” changed its title: Статус конвертации (App-Kit) → App-Kit conversion status
- [cosmetic] Tool “create_upload” changed its title: Загрузка файла (App-Kit) → App-Kit file upload
- [cosmetic] Tool “image_convert” changed its title: Конвертация картинки (App-Kit) → App-Kit image conversion
- [cosmetic] Tool “images_to_pdf” changed its title: Картинки → PDF (App-Kit) → App-Kit images to PDF
- [cosmetic] Tool “pdf_to_images” changed its title: PDF → картинки (App-Kit) → App-Kit PDF to images
- [cosmetic] Tool “quota_status” changed its title: Лимиты App-Kit MCP → App-Kit usage limits
- [cosmetic] Tool “seo_audit_fast” changed its title: Быстрый SEO-аудит (App-Kit) → App-Kit quick SEO audit
- [cosmetic] Tool “seo_audit_status” changed its title: Статус SEO-аудита (App-Kit) → App-Kit SEO audit status
- [cosmetic] Tool “text_check” changed its title: Проверка текста (App-Kit) → App-Kit text check

### 2026-10-25 (score 75, +1)

No change was recorded against any check on this day. Stability & Change Management went from 63 to 67. That category is still filling its 30-day observation window: 19 days of observed history at the previous scan, 20 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-23 (score 74, +1)

No change was recorded against any check on this day. Stability & Change Management went from 57 to 60. That category is still filling its 30-day observation window: 17 days of observed history at the previous scan, 18 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-21 (score 73, +1)

No change was recorded against any check on this day. Stability & Change Management went from 50 to 53. That category is still filling its 30-day observation window: 15 days of observed history at the previous scan, 16 at this one. The score rises as the window fills, whether or not the server changes.

## MCP tools (10)

### `text_check` (~180 tokens)

App-Kit text check

Check a text: metrics (filler words, spam, keyword stuffing), readability, stop phrases, grammar.

Input: text up to 20000 characters, lang (language of the text) ru or en. Returns passed (blocking thresholds),
metrics by layer, verdicts (blocking=false means a recommendation), top_issues (up to 5 main issues)
and locations: issue positions (offset/length) in the submitted text. The text is not stored.
Rate-limited per day; call quota_status for remaining calls.

Input parameters:

- `lang` (string): Language of the checked text
- `layers`: Layers: metrics, readability, phrases, grammar (all by default)
- `response_lang` (string): Language for human-readable messages; pass the user's language
- `text` (string, required): Text to check, up to 20000 characters

Output parameters:

- `lang` (string)
- `layers` (object): Metrics by layer (numbers and statuses only, no text fragments)
- `locations` (array): Up to 10 issue positions (grammar, stop phrases): offset/length in the submitted text
- `passed`: Whether the text passed all blocking thresholds
- `quota`
- `top_issues` (array): Up to 5 main issues, blocking failures first
- `verdicts` (array)

### `seo_audit_fast` (~181 tokens)

App-Kit quick SEO audit

Quick SEO audit of a public website (up to 10 pages): score 0-100 by check group, failed checks, top 5 losses.

The site root is audited: URL path and query are dropped (https://example.com/page?x=1 -> https://example.com/).
Waits up to 60 s for the result, sending progress. If not done by then, returns
status=running and a handle: call seo_audit_status(handle) every poll_after_s seconds while status=running.
Rate-limited per day; call quota_status for remaining calls. One domain: up to 5 audits per day.

Input parameters:

- `lang` (string): Language for human-readable messages; pass the user's language
- `url` (string, required): Public website URL, e.g. https://example.com (the site root is audited)

Output parameters:

- `checks` (array): Failed checks only (up to 100)
- `checks_failed_total`
- `domain`
- `handle`: Pass to seo_audit_status while status=running
- `mode` (string)
- `poll_after_s`
- `quota`
- `report_link`: PDF report link; not provided by this server (null)
- `score`
- `stage`: queued → crawl → analyze → report → done
- `status` (string)
- `top_losses` (array): Up to 5 checks with the largest score loss

### `seo_audit_status` (~93 tokens)

App-Kit SEO audit status

Status and result of an SEO audit by the handle from seo_audit_fast. Does not consume quota.

While status=running, call again after poll_after_s seconds. A handle is valid for
60 min and only for the caller who started the audit.

Input parameters:

- `handle` (string, required): handle returned by an SEO audit tool
- `lang` (string): Language for human-readable messages; pass the user's language

Output parameters:

- `checks` (array): Failed checks only (up to 100)
- `checks_failed_total`
- `domain`
- `handle`: Pass to seo_audit_status while status=running
- `mode` (string)
- `poll_after_s`
- `quota`
- `report_link`: PDF report link; not provided by this server (null)
- `score`
- `stage`: queued → crawl → analyze → report → done
- `status` (string)
- `top_losses` (array): Up to 5 checks with the largest score loss

### `pdf_to_images` (~271 tokens)

App-Kit PDF to images

Convert an existing PDF to images (one file per page): format png/jpeg/webp, dpi 72-300,
first_page/last_page. PDF up to 20 MB and up to 20 pages.
Input: exactly one of source_url (public URL, the server downloads it), upload_id (create_upload, then PUT) or data_base64 (up to 512 KB).
Output: download links (resource_link, valid for 10 min; deleted once all files of the job are downloaded) and a preview of the first image. If not done within 60 s, returns status=running and a handle: call conversion_status(handle).
Rate-limited per day; call quota_status for remaining calls.

Input parameters:

- `data_base64`: File as base64, only for small files (up to 512 KB)
- `dpi` (integer): Resolution 72-300 dpi
- `first_page`: First page (from 1)
- `format` (string): Page image format
- `lang` (string): Language for human-readable messages; pass the user's language
- `last_page`: Last page
- `source_url`: Public file URL (the server downloads it); preferred for hosted clients
- `upload_id`: upload_id from create_upload (after the file PUT)

Output parameters:

- `bytes_out`
- `expires_at`: When the links expire (UTC)
- `files` (array)
- `handle`: Pass to conversion_status while status=running
- `pages`: Number of rendered pages (pdf_to_images only)
- `poll_after_s`
- `quota`
- `status` (string)
- `tool` (string)

### `images_to_pdf` (~183 tokens)

App-Kit images to PDF

Combine existing images into one PDF (one image per page), page_size A4/Letter or the image size.
Input: source_urls[] or upload_ids[], up to 20 files, each up to 20 MB.
Output: download links (resource_link, valid for 10 min; deleted once all files of the job are downloaded) and a preview of the first image. If not done within 60 s, returns status=running and a handle: call conversion_status(handle).
Rate-limited per day; call quota_status for remaining calls.

Input parameters:

- `lang` (string): Language for human-readable messages; pass the user's language
- `page_size`: Page size; if omitted, the image size is used
- `source_urls`: Public image URLs, in page order
- `upload_ids`: Image upload_ids from create_upload, in page order

Output parameters:

- `bytes_out`
- `expires_at`: When the links expire (UTC)
- `files` (array)
- `handle`: Pass to conversion_status while status=running
- `pages`: Number of rendered pages (pdf_to_images only)
- `poll_after_s`
- `quota`
- `status` (string)
- `tool` (string)

### `image_convert` (~278 tokens)

App-Kit image conversion

Convert an existing image to another format: target_format png/jpeg/webp/bmp/tiff/gif, quality 1-100,
max_dim (downscale the long side). File up to 20 MB. For avif and maximum compression use image_compress.
Input: exactly one of source_url (public URL, the server downloads it), upload_id (create_upload, then PUT) or data_base64 (up to 512 KB).
Output: download links (resource_link, valid for 10 min; deleted once all files of the job are downloaded) and a preview of the first image. If not done within 60 s, returns status=running and a handle: call conversion_status(handle).
Rate-limited per day; call quota_status for remaining calls.

Input parameters:

- `data_base64`: File as base64, only for small files (up to 512 KB)
- `lang` (string): Language for human-readable messages; pass the user's language
- `max_dim`: Downscale the long side to N px
- `quality` (integer): Quality 1-100 (jpeg/webp)
- `source_url`: Public file URL (the server downloads it); preferred for hosted clients
- `target_format` (string, required): Target format
- `upload_id`: upload_id from create_upload (after the file PUT)

Output parameters:

- `bytes_out`
- `expires_at`: When the links expire (UTC)
- `files` (array)
- `handle`: Pass to conversion_status while status=running
- `pages`: Number of rendered pages (pdf_to_images only)
- `poll_after_s`
- `quota`
- `status` (string)
- `tool` (string)

### `conversion_status` (~101 tokens)

App-Kit conversion status

Status and result of a conversion by the handle from pdf_to_images / images_to_pdf / image_convert.
Does not consume quota. While status=running, call again after poll_after_s seconds.
A handle is valid for 1 hour and only for the caller who started the conversion.

Input parameters:

- `handle` (string, required): handle from pdf_to_images / images_to_pdf / image_convert
- `lang` (string): Language for human-readable messages; pass the user's language

Output parameters:

- `bytes_out`
- `expires_at`: When the links expire (UTC)
- `files` (array)
- `handle`: Pass to conversion_status while status=running
- `pages`: Number of rendered pages (pdf_to_images only)
- `poll_after_s`
- `quota`
- `status` (string)
- `tool` (string)

### `image_compress` (~253 tokens)

App-Kit image compression (WebP/AVIF)

Compress an existing image to WebP or AVIF: quality 1-100, width/height (downscale), preset
(photo/picture/drawing/icon/text), lossless. Returns a result link (valid up to 5 min),
original and new size, compression ratio. File up to 20 MB.
Input: exactly one of source_url (public URL, the server downloads it), upload_id (create_upload, then PUT) or data_base64 (up to 512 KB).
Rate-limited per day; call quota_status for remaining calls.

Input parameters:

- `data_base64`: File as base64, only for small files (up to 512 KB)
- `format` (string): Output format
- `height`: Downscale to this height, px
- `lang` (string): Language for human-readable messages; pass the user's language
- `lossless`: Lossless compression
- `preset`
- `quality`: Quality 1-100
- `source_url`: Public file URL (the server downloads it); preferred for hosted clients
- `upload_id`: upload_id from create_upload (after the file PUT)
- `width`: Downscale to this width, px

Output parameters:

- `compression_ratio` (number)
- `content_type` (string)
- `converted_size` (integer)
- `expires_at` (string)
- `height`
- `original_size` (integer)
- `quota`
- `status` (string)
- `url` (string): Result link (valid until expires_at)
- `width`

### `create_upload` (~170 tokens)

App-Kit file upload

Create a one-time upload link for a local file (for clients with local file access, e.g. Claude Code, Cursor).

Returns upload_id, put_url and a curl command: upload the file with a single PUT (up to
20 MB, within 10 min), then pass upload_id
to a file tool. One upload_id serves one call. For a file at a public URL, pass source_url directly instead.
Rate-limited per day; call quota_status for remaining calls.

Input parameters:

- `content_type` (string): MIME type, e.g. application/pdf or image/png
- `filename` (string, required): File name, e.g. report.pdf
- `lang` (string): Language for human-readable messages; pass the user's language
- `size` (integer, required): File size in bytes

Output parameters:

- `curl` (string): Ready-to-run upload command
- `expires_at` (string): Deadline to upload and use the file (UTC)
- `max_bytes` (integer)
- `put_url` (string): Where to upload the file with a single PUT (body: raw file bytes)
- `quota`
- `upload_id` (string): Pass to pdf_to_images / images_to_pdf / image_convert / image_compress

### `quota_status` (~73 tokens)

App-Kit usage limits

Show the current access tier and the remaining calls for each tool.

Tiers: L0 anonymous (shared per platform for Claude and ChatGPT), L1 personal token, L2 App-Kit account (OAuth). Does not consume quota.

Input parameters:

- `lang` (string): Language for human-readable messages; pass the user's language

Output parameters:

- `quota`
- `tier` (string)
- `tools` (array)
- `upgrade_url` (string)

## Diagnostics

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

## Score history

- 2026-11-05: 79
- 2026-11-04: 79
- 2026-11-03: 78
- 2026-11-02: 78
- 2026-11-01: 77
- 2026-10-31: 77
- 2026-10-30: 76
- 2026-10-29: 76
- 2026-10-28: 76
- 2026-10-27: 75
- 2026-10-26: 75
- 2026-10-25: 75
- 2026-10-24: 74
- 2026-10-23: 74
- 2026-10-22: 73
- 2026-10-21: 73
- 2026-10-20: 72
- 2026-10-19: 72
- 2026-10-18: 71
- 2026-10-17: 71
- 2026-10-16: 70
- 2026-10-15: 70
- 2026-10-14: 69
- 2026-10-13: 69
- 2026-10-12: 68
- 2026-10-11: 68
- 2026-10-10: 68
- 2026-10-07: 66
- 2026-10-06: 66

## Common questions

### What is the App-Kit MCP server?

App-Kit is an MCP server listed in the public MCP registry as io.github.app-kit-dev/mcp. SEO audit (400 checks), text readability and grammar check, PDF to images, image conversion. This page covers its hosted endpoint (https://mcp.app-kit.dev/mcp).

### Is the App-Kit MCP server safe to use?

App-Kit scores 79 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 App-Kit MCP server expose?

App-Kit exposes 10 tools: text_check, seo_audit_fast, seo_audit_status, pdf_to_images, images_to_pdf, and 5 more. Their descriptions and schemas cost roughly 1,783 tokens of context every time the server is loaded.

### Does the App-Kit MCP server require authentication?

No. We connected to App-Kit without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the App-Kit MCP server still maintained?

App-Kit is still listed as active in the MCP registry. We last reached this channel on 5 November 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://mcp.app-kit.dev/mcp
- Repository: https://github.com/app-kit-dev/mcp
- Website: https://app-kit.dev/mcp
- Changelog RSS feed: https://verifymcp.io/servers/app-kit-dev-mcp/mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/app-kit-dev-mcp/mcp.json
- HTML version of this page: https://verifymcp.io/servers/app-kit-dev-mcp/mcp