App-Kit
REMOTE · MCP.APP-KIT.DEV
SEO audit (400 checks), text readability and grammar check, PDF to images, image conversion.
Available components
Last scanned (5 hours ago)
Scores higher than 79% of remote servers
Reachable. Last reached 5 Nov 2026.
Category Marketing and SEO
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. How we score → Why this is hard to score →
Endpoint Security63
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one. See how to fix → View diagnostics → Partial
- HTTPS enforcement could not be verified: the plaintext port answered with HTTP 406, which proves neither a plaintext path nor enforcement. View diagnostics → Unverified
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability65
- AI-judged instruction clarity (good).Pass
- 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. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management100
- No destabilizing schema changes in the last 30 days.Pass
Tool Coverage99
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 98% of tool parameters carry a description.Partial
- Structured output schemas are declared (100% of tools); any adoption earns full credit.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 10 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 11 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a current MCP spec version (2026-07-28).Pass
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 4 Nov 26 +1
- Stability: 0.97 → pass security
- 2 Nov 26 +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.
- 31 Oct 26 +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.
- 28 Oct 26 +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.
- 26 Oct 26 0
- 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 security
- Schema quality: excellent → good functional
- New tool “image_compress” functional
- “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 cosmetic
- 25 Oct 26 +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.
- 23 Oct 26 +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.
- 21 Oct 26 +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.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 5 Nov 2026 · Probed https://mcp.app-kit.dev/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=app-kit.dev | CN=WE1,O=Google Trust Services,C=US | 8 Sept 2026 | 7 Dec 2026 | ECDSA 256 | ECDSA-SHA256 | 976fca599b7d808d13e26b9823e24daa |
| SANs: app-kit.dev, *.app-kit.dev | ||||||
| CN=WE1,O=Google Trust Services,C=US (CA) | CN=GTS Root R4,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | ECDSA 256 | ECDSA-SHA384 | 7ff31977972c224a76155d13b6d685e3 |
| CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 15 Nov 2023 | 28 Jan 2028 | ECDSA 384 | SHA256-RSA | 7fe530bf331343bedd821610493d8a1b |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of mcp.app-kit.dev. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| dev. | present | 60074 | 8 | Verified |
| app-kit.dev. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://mcp.app-kit.dev/mcp | Verified | 200 | |
| http (plaintext) | http://mcp.app-kit.dev/mcp | Inconclusive | 406 |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
conversion_status App-Kit conversion status ~101
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.
| Name | Type | Req | Description |
|---|---|---|---|
| handle | string | yes | handle from pdf_to_images / images_to_pdf / image_convert |
| lang | string | – | Language for human-readable messages; pass the user's language |
| Name | Type | Req | Description |
|---|---|---|---|
| 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 | – | yes | – |
| status | string | yes | – |
| tool | string | yes | – |
No examples provided.
create_upload App-Kit file upload ~170
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.
| Name | Type | Req | Description |
|---|---|---|---|
| content_type | string | – | MIME type, e.g. application/pdf or image/png |
| filename | string | yes | File name, e.g. report.pdf |
| lang | string | – | Language for human-readable messages; pass the user's language |
| size | integer | yes | File size in bytes |
| Name | Type | Req | Description |
|---|---|---|---|
| curl | string | yes | Ready-to-run upload command |
| expires_at | string | yes | Deadline to upload and use the file (UTC) |
| max_bytes | integer | yes | – |
| put_url | string | yes | Where to upload the file with a single PUT (body: raw file bytes) |
| quota | – | yes | – |
| upload_id | string | yes | Pass to pdf_to_images / images_to_pdf / image_convert / image_compress |
No examples provided.
image_compress App-Kit image compression (WebP/AVIF) ~253
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.
| Name | Type | Req | Description |
|---|---|---|---|
| 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 |
| Name | Type | Req | Description |
|---|---|---|---|
| compression_ratio | number | yes | – |
| content_type | string | yes | – |
| converted_size | integer | yes | – |
| expires_at | string | yes | – |
| height | – | – | – |
| original_size | integer | yes | – |
| quota | – | yes | – |
| status | string | yes | – |
| url | string | yes | Result link (valid until expires_at) |
| width | – | – | – |
No examples provided.
image_convert App-Kit image conversion ~278
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.
| Name | Type | Req | Description |
|---|---|---|---|
| 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 | yes | Target format |
| upload_id | – | – | upload_id from create_upload (after the file PUT) |
| Name | Type | Req | Description |
|---|---|---|---|
| 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 | – | yes | – |
| status | string | yes | – |
| tool | string | yes | – |
No examples provided.
images_to_pdf App-Kit images to PDF ~183
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.
| Name | Type | Req | Description |
|---|---|---|---|
| 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 |
| Name | Type | Req | Description |
|---|---|---|---|
| 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 | – | yes | – |
| status | string | yes | – |
| tool | string | yes | – |
No examples provided.
pdf_to_images App-Kit PDF to images ~271
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.
| Name | Type | Req | Description |
|---|---|---|---|
| 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) |
| Name | Type | Req | Description |
|---|---|---|---|
| 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 | – | yes | – |
| status | string | yes | – |
| tool | string | yes | – |
No examples provided.
quota_status App-Kit usage limits ~73
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.
| Name | Type | Req | Description |
|---|---|---|---|
| lang | string | – | Language for human-readable messages; pass the user's language |
| Name | Type | Req | Description |
|---|---|---|---|
| quota | – | yes | – |
| tier | string | yes | – |
| tools | array | yes | – |
| upgrade_url | string | yes | – |
No examples provided.
seo_audit_fast App-Kit quick SEO audit ~181
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.
| Name | Type | Req | Description |
|---|---|---|---|
| lang | string | – | Language for human-readable messages; pass the user's language |
| url | string | yes | Public website URL, e.g. https://example.com (the site root is audited) |
| Name | Type | Req | Description |
|---|---|---|---|
| checks | array | – | Failed checks only (up to 100) |
| checks_failed_total | – | – | – |
| domain | – | – | – |
| handle | – | – | Pass to seo_audit_status while status=running |
| mode | string | yes | – |
| poll_after_s | – | – | – |
| quota | – | yes | – |
| report_link | – | – | PDF report link; not provided by this server (null) |
| score | – | – | – |
| stage | – | – | queued → crawl → analyze → report → done |
| status | string | yes | – |
| top_losses | array | – | Up to 5 checks with the largest score loss |
No examples provided.
seo_audit_status App-Kit SEO audit status ~93
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.
| Name | Type | Req | Description |
|---|---|---|---|
| handle | string | yes | handle returned by an SEO audit tool |
| lang | string | – | Language for human-readable messages; pass the user's language |
| Name | Type | Req | Description |
|---|---|---|---|
| checks | array | – | Failed checks only (up to 100) |
| checks_failed_total | – | – | – |
| domain | – | – | – |
| handle | – | – | Pass to seo_audit_status while status=running |
| mode | string | yes | – |
| poll_after_s | – | – | – |
| quota | – | yes | – |
| report_link | – | – | PDF report link; not provided by this server (null) |
| score | – | – | – |
| stage | – | – | queued → crawl → analyze → report → done |
| status | string | yes | – |
| top_losses | array | – | Up to 5 checks with the largest score loss |
No examples provided.
text_check App-Kit text check ~180
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.
| Name | Type | Req | Description |
|---|---|---|---|
| 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 | yes | Text to check, up to 20000 characters |
| Name | Type | Req | Description |
|---|---|---|---|
| lang | string | yes | – |
| layers | object | yes | 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 | – | yes | Whether the text passed all blocking thresholds |
| quota | – | yes | – |
| top_issues | array | yes | Up to 5 main issues, blocking failures first |
| verdicts | array | yes | – |
No examples provided.
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.
remote · mcp.app-kit.dev
claude mcp add --transport http app-kit-dev-mcp 'https://mcp.app-kit.dev/mcp'
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.