# Appside Docs and App Catalog (remote · appside.build)

Game web store docs plus a free app catalog: agents list, verify and search apps and games.

- Trust score: 71/100 (medium)
- Change this week: +4
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- remote · `appside.build`: 71/100 (this document), [markdown](https://verifymcp.io/servers/build-appside-mcp/appside.md), [page](https://verifymcp.io/servers/build-appside-mcp/appside)

## Channel facts

- Endpoint: `https://appside.build/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `0.2.0`

## 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 2026-11-05.

- **Endpoint Security**: 74/100
  - 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 is enforced; there's no plaintext access path.
  - 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**: 74/100
  - 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).
  - AI-judged instruction clarity (fair).
  - Tool/resource definitions use about 1110 tokens (~79/item across 14 items; 13 tools + 1 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 33/100
  - Stability observed for 10 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 72/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 16% 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 13 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 15 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 40/100
  - Spec-recency check failed: implements MCP spec 2025-03-26; the latest is 2026-07-28.

## Install

### How do I install the Appside Docs and App Catalog MCP server?

Appside Docs and App Catalog is a hosted endpoint at https://appside.build/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 build-appside-mcp 'https://appside.build/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "build-appside-mcp": {
      "url": "https://appside.build/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "build-appside-mcp": {
      "type": "http",
      "url": "https://appside.build/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.build-appside-mcp]
url = "https://appside.build/mcp"
```

### opencode

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

### OpenClaw

```bash
openclaw mcp add build-appside-mcp --url 'https://appside.build/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  build-appside-mcp:
    url: "https://appside.build/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "build-appside-mcp": {
      "Transport": "http",
      "Url": "https://appside.build/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add build-appside-mcp -t streamable-http -u 'https://appside.build/mcp'
```

### Other

```json
{
  "mcpServers": {
    "build-appside-mcp": {
      "type": "http",
      "url": "https://appside.build/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.

### 2026-11-05 (score 71, +1)

- [security] Tool “claim_mcp_listing” rewrote its description, which is the text the model reads
- [security] Tool “confirm_mcp_claim” rewrote its description, which is the text the model reads

### 2026-11-03 (score 70, 0)

- [security] The server rewrote its instructions, which are the text every model session reads
- [security] Tool “get_sdk_status” rewrote its description, which is the text the model reads
- [functional regression] Schema quality: 680 → 1077
- [functional] New tool “claim_mcp_listing”
- [functional] New tool “confirm_mcp_claim”
- [functional] New tool “create_account”
- [functional] New tool “submit_index_entry”
- [functional] New tool “submit_mcp_server”
- [cosmetic] “register_app” added an optional parameter “token”
- [cosmetic] “verify_app” added an optional parameter “token”

### 2026-11-02 (score 70, +1)

No change was recorded against any check on this day. Stability & Change Management went from 20 to 23. That category is still filling its 30-day observation window: 6 days of observed history at the previous scan, 7 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-31 (score 69, +1)

- [security] Tool “register_app” rewrote its description, which is the text the model reads
- [security] Tool “verify_app” rewrote its description, which is the text the model reads
- [functional regression] Schema quality: 66 → 75
- [cosmetic] “register_app” reworded the description of “url”
- [cosmetic] “register_app” reworded the description of “webBuildUrl”

### 2026-10-30 (score 68, +1)

- [security] The server rewrote its instructions, which are the text every model session reads
- [functional regression] Schema quality: 33 → 66
- [functional improvement] Tool coverage: 0% → 16%
- [functional] Server version: 0.1.0 → 0.2.0
- [functional] New tool “get_app”
- [functional] New tool “register_app”
- [functional] New tool “search_apps”
- [functional] New tool “verify_app”

### 2026-10-29 (score 67, +1)

No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-27 (score 66, +5)

- [security improvement] HTTPS: unverified → pass
- [functional improvement] Stability: unverified → 0.03

### 2026-10-26 (score 61, +43)

- [security improvement] Authorization: unverified → partial
- [security improvement] Injection markers: unverified → pass
- [security improvement] Transport: fail → pass
- [security] First check of Judged manipulation: pass
- [functional regression] MCP protocol: unverified → fail
- [functional improvement] Tool coverage: unverified → 100
- [functional improvement] Schema quality: unverified → 100
- [functional] First check of Tool coverage: 0
- [functional] First check of Schema quality: fail
- [functional] First check of Schema quality: fair
- [functional] First check of Destructive annotations: pass
- [functional] First check of Schema quality: pass

## MCP tools (13)

### `search_docs` (~28 tokens)

Search Appside public developer Markdown; returns source links and excerpts.

Input parameters:

- `query` (string, required)

### `get_sdk_snippet` (~36 tokens)

Get a repository SDK example and its documented verification status. Grant items only on verified backend delivery.

Input parameters:

- `platform` (string, required)

### `get_sdk_status` (~34 tokens)

List all SDK download URLs, install instructions and scoped verification status, or select one platform.

Input parameters:

- `platform` (string)

### `get_pricing` (~21 tokens)

Get Appside published payment fee and fixed-fee policy.

### `register_app` (~274 tokens)

List any app or game you built in the Appside public app catalog. No Appside store or account required. Supply plain-text metadata and your website or exact https://<account>.itch.io/<game> page (or App Store/Google Play listing for a store-only app). Returns an id and ownership token; publish the token then call verify_app. Nothing is public until verified; pending entries expire after 14 days.

Input parameters:

- `appStoreUrl` (string)
- `category` (string, required)
- `contactEmail` (string): Optional private contact, never shown publicly.
- `description` (string, required)
- `name` (string, required)
- `platforms` (array, required)
- `playStoreUrl` (string)
- `token` (string): Optional Appside bearer token. Associates registrations with your account. Store securely; never log it.
- `url` (string): HTTPS app website on a domain you control, or the exact game page on your own itch.io subdomain. Each itch game path is a separate identity. Omit only for store-only apps.
- `webBuildUrl` (string): HTTPS playable build on your verified hostname, an itch game page, or https://itch.io/embed-upload/<id>; itch game pages resolve to the browser upload at verification; click-to-load sandboxed Play.

### `verify_app` (~125 tokens)

Verify a pending registration after publishing the returned token at /.well-known/appside-verify.txt or in a meta name="appside-verify" content="TOKEN" tag on the submitted website. For itch.io, put the token anywhere in the public text of the exact submitted game page (edit its description). Store-only apps put the token in every submitted public store description. Success makes the catalog page searchable and indexable.

Input parameters:

- `id` (string, required)
- `token` (string): Optional Appside bearer token. Associates registrations with your account. Store securely; never log it.

### `get_app` (~45 tokens)

Get a verified public app by registration id or slug. Pending, expired or moderated listings are not returned; no private contacts or verification tokens are exposed.

Input parameters:

- `id` (string, required)

### `search_apps` (~67 tokens)

Search verified public apps and games by text, category or playable web build. Pending, expired and moderated listings are excluded.

Input parameters:

- `category` (string)
- `limit` (integer)
- `offset` (integer)
- `playable` (boolean)
- `query` (string)

### `create_account` (~65 tokens)

Create an Appside account without a form. Save the bearer token securely; it is shown once. Give the human the claimUrl. Unclaimed accounts expire after 30 days.

Input parameters:

- `agent` (string, required)
- `email` (string)
- `purpose` (string)

### `submit_mcp_server` (~60 tokens)

Submit an MCP server for connectivity checks. Domain proof is still required to claim ownership. Pass token or an Authorization: Bearer header on HTTP /mcp. Never publish credentials.

Input parameters:

- `server` (object, required)
- `token` (string)

### `claim_mcp_listing` (~76 tokens)

Get a domain-proof token with file URLs and DNS TXT records for an MCP listing. Publish the exact token at any supplied URL or TXT name (exact host only). Pass token or an Authorization: Bearer header on HTTP /mcp. Never publish credentials.

Input parameters:

- `slug` (string, required)
- `token` (string)

### `confirm_mcp_claim` (~68 tokens)

Confirm domain proof after publishing the exact verification token at a supplied file URL or DNS TXT name. DNS propagation may take time. Pass token or an Authorization: Bearer header on HTTP /mcp. Never publish credentials.

Input parameters:

- `slug` (string, required)
- `token` (string)

### `submit_index_entry` (~60 tokens)

Submit a web store to the Index for review; does not establish ownership or publish automatically. Pass token or an Authorization: Bearer header on HTTP /mcp. Never publish credentials.

Input parameters:

- `entry` (object, required)
- `token` (string)

## Diagnostics

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

## Score history

- 2026-11-05: 71
- 2026-11-04: 70
- 2026-11-03: 70
- 2026-11-02: 70
- 2026-11-01: 69
- 2026-10-31: 69
- 2026-10-30: 68
- 2026-10-29: 67
- 2026-10-28: 66
- 2026-10-27: 66
- 2026-10-26: 61
- 2026-10-25: 18

## Common questions

### What is the Appside Docs and App Catalog MCP server?

Appside Docs and App Catalog is an MCP server listed in the public MCP registry as build.appside/mcp. Game web store docs plus a free app catalog: agents list, verify and search apps and games. This page covers its hosted endpoint (https://appside.build/mcp).

### Is the Appside Docs and App Catalog MCP server safe to use?

Appside Docs and App Catalog scores 71 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 Appside Docs and App Catalog MCP server expose?

Appside Docs and App Catalog exposes 13 tools: search_docs, get_sdk_snippet, get_sdk_status, get_pricing, register_app, and 8 more. Their descriptions and schemas cost roughly 959 tokens of context every time the server is loaded.

### Does the Appside Docs and App Catalog MCP server require authentication?

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

### Is the Appside Docs and App Catalog MCP server still maintained?

Appside Docs and App Catalog 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://appside.build/mcp
- Website: https://appside.build/docs/mcp/
- Changelog RSS feed: https://verifymcp.io/servers/build-appside-mcp/appside.xml
- Changelog JSON feed: https://verifymcp.io/servers/build-appside-mcp/appside.json
- HTML version of this page: https://verifymcp.io/servers/build-appside-mcp/appside