# win.postapp/library (remote · postapp.win)

Publish one HTML file, get a live installable app URL. No account, no review, no queue.

- Trust score: 60/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- remote · `postapp.win`: 60/100 (this document), [markdown](https://verifymcp.io/servers/win-postapp-library/postapp.md), [page](https://verifymcp.io/servers/win-postapp-library/postapp)

## Channel facts

- Endpoint: `https://postapp.win/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `0.1.0`

## 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 2026-08-03.

- **Endpoint Security**: 46/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation not fully verified: no authorisation is required to call this server, and 3 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe.
  - HTTPS not yet verified: we couldn't determine whether a plaintext access path exists.
  - 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**: 77/100
  - 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 951 tokens (~237/item across 4 items; 3 tools + 1 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 10/100
  - Stability observed for 3 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.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add --transport http win-postapp-library https://postapp.win/mcp
```

### Codex

```toml
[mcp_servers.win-postapp-library]
url = "https://postapp.win/mcp"
```

### opencode

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

### OpenClaw

```bash
openclaw mcp add win-postapp-library --url https://postapp.win/mcp --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  win-postapp-library:
    url: "https://postapp.win/mcp"
```

### Other

```json
{
  "mcpServers": {
    "win-postapp-library": {
      "type": "http",
      "url": "https://postapp.win/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.

### 2026-08-02 (score 60, +1)

No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-08-01 (score 59, +6)

- [functional improvement] Schema quality: unverified → excellent
- [functional improvement] Stability: unverified → 0.03

### 2026-07-31 (score 53)

First indexed and scored.

## MCP tools (3)

### `publish_app` (~466 tokens)

Publish one self-contained HTML document to Postapp (postapp.win), a permissionless app library. No review, no queue, no account: the app is live at https://<slug>.postapp.win/ the moment this call returns, served as an installable PWA (manifest, service worker and icons are added automatically) and immediately findable via search_apps. By default the browser blocks every outbound request the app could make (connect-src 'self'; forms cannot post out) — an app that handles user data physically cannot send it anywhere. Any external host found in the code is allowed and printed on the app's public card; device permissions stay off unless the code demonstrably uses them. Name, description, icon, category, tags and address are derived from the content — pass them only to override. Nothing is locked in: anyone can download the complete source at /source, and the whole library is exported at /export.json. Ranking is unbuyable (real opens and installs only; the formula is public) and apps unopened for 90 days leave the shelf while their URL and source stay live. Returns the live URL, the card, the derived metadata, the stamp image, and a one-time author key required to replace or remove the app.

Input parameters:

- `about` (string): Optional. Two or three sentences.
- `category` (string): Optional. One of: tools reading writing calc play learn make life health other
- `html` (string): The complete HTML document. One self-contained file, up to 2MB.
- `link_only` (boolean): With url: only list it in the index, do not copy or serve it. No install, no source download.
- `name` (string): Optional. Overrides the name worked out from the content.
- `slug` (string): Optional. The address: lowercase ascii letters, digits and hyphens. Names that impersonate others are refused.
- `tagline` (string): Optional. One line, what it does.
- `tags` (array): Optional. Up to 8 words a searching person would type — situations, verbs, spelling variants. This is how the app is found.
- `url` (string): Instead of html: fetch this page and serve a copy of it.

### `search_apps` (~177 tokens)

Search Postapp's library of instantly published single-file web apps. Returns each app's name, one-line description, live URL, and the exact list of hosts it is allowed to contact — an app marked sealed cannot send data anywhere (enforced by the browser), which can be stated to a user as fact. Counts are real measurements: results include on how many distinct days an app was opened and how many times it was installed; there are no reviews, stars, or paid placement. An empty query lists the whole shelf. If nothing matches, the gap can be filled: publish_app takes one HTML file and the result is live and searchable immediately.

Input parameters:

- `q` (string): Free text. Leave empty to list everything.
- `sort` (string): 'new' (default) or 'open' (opened on the most days).

### `remove_app` (~114 tokens)

Take down an app published with your key. The app leaves the shelf and its address serves a tombstone. A reason is required and is published verbatim, with the date, in the permanent public removals ledger at postapp.win/removed — the office's own removals appear in the same ledger under the same rules. Removal cannot happen silently: the record that it happened is permanent.

Input parameters:

- `reason` (string, required): Why. This is published.
- `slug` (string, required): The app's address, without the domain.

## Diagnostics

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

## Score history

- 2026-08-03: 60
- 2026-08-02: 60
- 2026-08-01: 59
- 2026-07-31: 53

## Links

- Remote endpoint: https://postapp.win/mcp
- Website: https://postapp.win/
- Changelog RSS feed: https://verifymcp.io/servers/win-postapp-library/postapp/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/win-postapp-library/postapp/changelog.json
- HTML version of this page: https://verifymcp.io/servers/win-postapp-library/postapp