# FlipLetters (npm · flipletters-mcp-server)

Draft, validate, render, and share split-flap and flip-dot board videos written in flipcode.

- Trust score: 73/100 (medium)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- remote · `app.flipletters.com`: 85/100, [markdown](https://verifymcp.io/servers/com-flipletters-mcp/mcp-v1.md), [page](https://verifymcp.io/servers/com-flipletters-mcp/mcp-v1)
- npm · `flipletters-mcp-server`: 73/100 (this document), [markdown](https://verifymcp.io/servers/com-flipletters-mcp/flipletters-mcp-server.md), [page](https://verifymcp.io/servers/com-flipletters-mcp/flipletters-mcp-server)

## Channel facts

- Registry: `npm`
- Package: `flipletters-mcp-server`
- Version: `0.3.1`
- Transport: `stdio`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, 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.

- **Supply Chain Security**: 81/100
  - No malware found by supply-chain analysis.
  - CVE check failed: a known high-severity CVE affects zod 3.25.76, a direct dependency. A fixed version is available.
  - No install/post-install scripts declared.
  - 30 of 94 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 45/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 21 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 76/100
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 1225 tokens (~102/item across 12 items; 12 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 63/100
  - Stability observed for 19 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 95/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 84% of tool parameters carry a description.
  - Structured output schemas are declared (33% 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 12 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 12 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the FlipLetters MCP server?

FlipLetters runs locally as an npm package, launched with npx -y flipletters-mcp-server. 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 com-flipletters-mcp -- npx -y flipletters-mcp-server
```

### Cursor

```json
{
  "mcpServers": {
    "com-flipletters-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "flipletters-mcp-server"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "com-flipletters-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "flipletters-mcp-server"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add com-flipletters-mcp -- npx -y flipletters-mcp-server
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "com-flipletters-mcp": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "flipletters-mcp-server"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add com-flipletters-mcp --command npx --arg -y --arg flipletters-mcp-server
```

### Hermes

```yaml
mcp_servers:
  com-flipletters-mcp:
    command: "npx"
    args: ["-y", "flipletters-mcp-server"]
```

### Netclaw

```json
{
  "McpServers": {
    "com-flipletters-mcp": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "flipletters-mcp-server"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add com-flipletters-mcp -t stdio -c npx -a -y flipletters-mcp-server
```

### Other

```json
{
  "mcpServers": {
    "com-flipletters-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "flipletters-mcp-server"
      ]
    }
  }
}
```

## 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.

### 2026-11-03 (score 73, +1)

No change was recorded against any check on this day. Stability & Change Management went from 53 to 57. That category is still filling its 30-day observation window: 16 days of observed history at the previous scan, 17 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-11-01 (score 72, +1)

No change was recorded against any check on this day. Stability & Change Management went from 47 to 50. That category is still filling its 30-day observation window: 14 days of observed history at the previous scan, 15 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-30 (score 71, +1)

No change was recorded against any check on this day. Stability & Change Management went from 40 to 43. That category is still filling its 30-day observation window: 12 days of observed history at the previous scan, 13 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-28 (score 70, +1)

No change was recorded against any check on this day. Stability & Change Management went from 33 to 37. That category is still filling its 30-day observation window: 10 days of observed history at the previous scan, 11 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-26 (score 69, +1)

No change was recorded against any check on this day. Stability & Change Management went from 27 to 30. That category is still filling its 30-day observation window: 8 days of observed history at the previous scan, 9 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-24 (score 68, −4)

- [security regression] CVE-2023-54404 affects this package: high
- [security regression] Known CVEs: pass → fail

### 2026-10-21 (score 72, +1)

No change was recorded against any check on this day. Stability & Change Management went from 10 to 13. That category is still filling its 30-day observation window: 3 days of observed history at the previous scan, 4 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-19 (score 71, +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.

## MCP tools (12)

### `flipletters_flipcode_reference` (~57 tokens)

flipcode reference

Returns the flipcode cheat sheet (spec v1): directives, board types and size limits, transition modes, and flip-native effect recipes. Call this before writing a board so the code you produce is valid on the first try.

Output parameters:

- `reference` (string)

### `flipletters_validate_board` (~114 tokens)

Validate a board

Parses a flipcode document, returning the normalized canonical code, any warnings (out-of-range values are clamped, unknown lines ignored), a board summary, and links: a share URL that opens the exact board in the FlipLetters Studio, and an open-with-code URL that also reveals the code panel. Use this after drafting a board; fix warnings and re-validate until clean, then give the human the share link.

Input parameters:

- `code` (string, required): A complete flipcode document (see flipletters_flipcode_reference).

Output parameters:

- `canonicalCode` (string)
- `openWithCodeUrl` (string|null)
- `shareUrl` (string|null): Opens this exact board in the Studio. Null when the board is too large for a URL — share the code text instead.
- `summary` (object)
- `valid` (boolean)
- `warnings` (array)

### `flipletters_example_board` (~97 tokens)

Example board

Returns a complete, valid flipcode document for a board type (minimal, trainboard/station, artboard, flipdot, marquee, announcement, arena) — a known-good starting point to edit rather than writing from scratch.

Input parameters:

- `template` (string, required): Board type or alias: minimal, trainboard, station, artboard, art, flipdot, dots, marquee, desk, announcement, poster, arena, lightbox.

Output parameters:

- `code` (string)
- `template` (string)

### `flipletters_template_url` (~230 tokens)

Readable template URL

Builds a human-readable FlipLetters Studio URL where every query parameter mirrors one flipcode line — good for short text boards you want legible in the address itself (chat messages, docs). For full fidelity or paint grids use flipletters_validate_board's share link instead. Slides are strings with | between rows.

Input parameters:

- `accent` (string): Hex color, # optional.
- `board` (string): Board type/alias, e.g. "station".
- `flip` (string): Transition, commas for spaces: "cascade,9,0.2,0.4".
- `grid` (string): ROWSxCOLS, e.g. "8x34".
- `hold` (string): Seconds, e.g. "6".
- `out` (string): Canvas: "vertical", "square", "1200x630@25", …
- `slides` (array): Each entry is one slide; | separates rows: "EGGS BENEDICT|FLAT WHITE".
- `sound` (string)
- `speed` (string)
- `title` (string)

Output parameters:

- `url` (string)

### `flipletters_render_board` (~142 tokens)

Cloud-render a board to MP4

Parses flipcode and submits a cloud MP4 render under the API key owner's FlipLetters plan (same free quota / Premium / Studio limits as the Studio). Requires FLIPLETTERS_API_KEY. Polls until done (or returns jobId if wait=false). Prefer share links for free previews; only render when the human wants an MP4 file.

Input parameters:

- `code` (string, required): Complete flipcode document.
- `repeat` (integer): Loop the segment this many times (default 1). Caps apply for long / 4K exports.
- `wait` (boolean): If true (default), poll until done/error. If false, return jobId immediately.

### `flipletters_render_status` (~46 tokens)

Cloud render job status

Poll a cloud render job started with flipletters_render_board. Requires FLIPLETTERS_API_KEY.

Input parameters:

- `jobId` (string, required): Job id returned by flipletters_render_board.

### `flipletters_list_teams` (~41 tokens)

List my teams

Lists FlipLetters teams the API key owner belongs to (teamId, name, inviteCode). Requires FLIPLETTERS_API_KEY with team scope.

### `flipletters_share_to_team` (~93 tokens)

Share board to team library

Parses flipcode and shares the board into a Team Library the key owner is a member of. Requires FLIPLETTERS_API_KEY. Use flipletters_list_teams first to get teamId.

Input parameters:

- `code` (string, required): Complete flipcode document.
- `name` (string, required): Display name for the template in the team library.
- `teamId` (string, required): Team id from flipletters_list_teams.

### `flipletters_list_workspaces` (~49 tokens)

List FlipLetters projects

Lists agency projects (workspaces) for the API key owner, plus the active project id. Project-scoped keys return their bound project as active. Requires FLIPLETTERS_API_KEY.

### `flipletters_list_postiz_destinations` (~60 tokens)

List Postiz share accounts on a project

Lists Postiz destinations (masked keys) attached to a FlipLetters project. Use flipletters_list_workspaces first. Requires FLIPLETTERS_API_KEY.

Input parameters:

- `workspaceId` (string, required): Project id from flipletters_list_workspaces.

### `flipletters_list_postiz_integrations` (~62 tokens)

List channels on a Postiz destination

Lists connected social channels for a project's Postiz share account. Use before flipletters_share_to_postiz to get integrationId. Requires FLIPLETTERS_API_KEY.

Input parameters:

- `destinationId` (string, required)
- `workspaceId` (string, required)

### `flipletters_share_to_postiz` (~234 tokens)

Schedule export on Postiz

Uploads a cloud media URL (or Studio host local fileName) to a project's Postiz destination and schedules/drafts/posts it. Loop: render_board → list_workspaces → list_postiz_destinations → list_postiz_integrations → share_to_postiz. Requires FLIPLETTERS_API_KEY. Prefer mediaUrl from flipletters_render_board.

Input parameters:

- `content` (string): Caption / post body.
- `date` (string, required): UTC ISO datetime, e.g. 2026-08-14T15:00:00.000Z
- `destinationId` (string, required): Postiz destination id on that project.
- `fileName` (string): Local renders/*.mp4 name when Studio host has the file.
- `integrationId` (string, required): Postiz channel/integration id.
- `mediaUrl` (string): HTTPS URL of the MP4 (from cloud render).
- `providerType` (string): Postiz provider __type, e.g. tiktok, x, linkedin.
- `type` (string): Default schedule.
- `workspaceId` (string, required): FlipLetters project id.

## Diagnostics

Captured diagnostic sections: Provenance, Vulnerabilities, Dependencies. The full working is on the page: https://verifymcp.io/servers/com-flipletters-mcp/flipletters-mcp-server#diagnostics

## Score history

- 2026-11-05: 73
- 2026-11-04: 73
- 2026-11-03: 73
- 2026-11-02: 72
- 2026-11-01: 72
- 2026-10-31: 71
- 2026-10-30: 71
- 2026-10-29: 70
- 2026-10-28: 70
- 2026-10-27: 69
- 2026-10-26: 69
- 2026-10-25: 68
- 2026-10-24: 68
- 2026-10-23: 72
- 2026-10-22: 72
- 2026-10-21: 72
- 2026-10-20: 71
- 2026-10-19: 71
- 2026-10-18: 70
- 2026-10-17: 70

## Common questions

### What is the FlipLetters MCP server?

FlipLetters is an MCP server listed in the public MCP registry as com.flipletters/mcp. Draft, validate, render, and share split-flap and flip-dot board videos written in flipcode. This page covers its npm package (flipletters-mcp-server).

### Is the FlipLetters MCP server safe to use?

FlipLetters scores 73 out of 100 on VerifyMCP. We recorded 1 known advisory against it as of 5 November 2026. It declares no install or post-install scripts. 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 FlipLetters MCP server expose?

FlipLetters exposes 12 tools: flipletters_flipcode_reference, flipletters_validate_board, flipletters_example_board, flipletters_template_url, flipletters_render_board, and 7 more. Their descriptions and schemas cost roughly 1,225 tokens of context every time the server is loaded.

### Is the FlipLetters MCP server still maintained?

FlipLetters 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.

### What licence is the FlipLetters MCP server under?

FlipLetters declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.

### What did VerifyMCP test on the FlipLetters MCP server?

VerifyMCP ran 16 checks on FlipLetters, covering Malware scan, Known CVEs, Install scripts, Dependency health and 12 more. Endpoint Security and Transport & Reachability do not apply to an npm package, so they were not tested. The score does not measure everything, and the scoring documentation lists what it leaves out.

## Links

- npm package: https://www.npmjs.com/package/flipletters-mcp-server
- Socket report: https://socket.dev/npm/package/flipletters-mcp-server
- Repository: https://github.com/Terahertz-Inc/flipletters-mcp
- Website: https://flipletters.com/mcp
- Changelog RSS feed: https://verifymcp.io/servers/com-flipletters-mcp/flipletters-mcp-server.xml
- Changelog JSON feed: https://verifymcp.io/servers/com-flipletters-mcp/flipletters-mcp-server/changelog.json
- Trust report (JSON): https://verifymcp.io/servers/com-flipletters-mcp/flipletters-mcp-server.json
- HTML version of this page: https://verifymcp.io/servers/com-flipletters-mcp/flipletters-mcp-server