# LeClap (npm · @leclap/mcp)

Compose and render video from one JSON template. Deterministic, runs locally, no generative model.

- Trust score: 84/100 (high trust)
- Change this week: +4
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-23

## Components

- npm · `@leclap/mcp`: 84/100 (this document), [markdown](https://verifymcp.io/servers/dev-leclap-video/leclap-mcp.md), [page](https://verifymcp.io/servers/dev-leclap-video/leclap-mcp)

## Channel facts

- Registry: `npm`
- Package: `@leclap/mcp`
- Version: `0.3.4`
- 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 2026-09-23.

- **Supply Chain Security**: 98/100
  - No malware found by supply-chain analysis.
  - No known CVEs affecting this package version or its production dependencies.
  - No install/post-install scripts declared.
  - 23 of 73 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 48/100
  - 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 29 days ago).
  - Publishes a security disclosure policy (SECURITY.md).
- **Schema Quality & AI Usability**: 83/100
  - 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 301 tokens (~60/item across 5 items; 5 tools + 0 resources), lean.
  - 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**: 71/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 0% of tool parameters carry a description.
  - Structured output schemas are declared (60% 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 5 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 5 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 LeClap MCP server?

LeClap runs locally as an npm package, launched with npx -y @leclap/mcp. 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 dev-leclap-video -- npx -y @leclap/mcp
```

### Cursor

```json
{
  "mcpServers": {
    "dev-leclap-video": {
      "command": "npx",
      "args": [
        "-y",
        "@leclap/mcp"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "dev-leclap-video": {
      "command": "npx",
      "args": [
        "-y",
        "@leclap/mcp"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add dev-leclap-video -- npx -y @leclap/mcp
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "dev-leclap-video": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "@leclap/mcp"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add dev-leclap-video --command npx --arg -y --arg @leclap/mcp
```

### Hermes

```yaml
mcp_servers:
  dev-leclap-video:
    command: "npx"
    args: ["-y", "@leclap/mcp"]
```

### Netclaw

```json
{
  "McpServers": {
    "dev-leclap-video": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "@leclap/mcp"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add dev-leclap-video -t stdio -c npx -a -y @leclap/mcp
```

### Other

```json
{
  "mcpServers": {
    "dev-leclap-video": {
      "command": "npx",
      "args": [
        "-y",
        "@leclap/mcp"
      ]
    }
  }
}
```

## 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.

### 2026-09-23 (score 84, +1)

- [security] Stability: 0.97 → pass

### 2026-09-21 (score 83, +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.

### 2026-09-19 (score 82, +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.

### 2026-09-17 (score 81, +1)

No change was recorded against any check on this day. Stability & Change Management went from 77 to 80. That category is still filling its 30-day observation window: 23 days of observed history at the previous scan, 24 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-15 (score 80, +1)

No change was recorded against any check on this day. Stability & Change Management went from 70 to 73. That category is still filling its 30-day observation window: 21 days of observed history at the previous scan, 22 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-13 (score 79, +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.

### 2026-09-10 (score 78, +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.

### 2026-09-08 (score 77, +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.

## MCP tools (5)

### `ping` (~16 tokens)

Ping

Health check — returns a fixed readiness string.

### `get_template_schema` (~43 tokens)

Get Template Schema

Return the JSON Schema for a template descriptor plus a short authoring guide. Use this to understand the full set of fields when building or editing a template for compose_video.

### `validate_template` (~72 tokens)

Validate Template

Dry-run an inline `template` descriptor against the core schema WITHOUT rendering — returns instantly. Get back whether it is valid plus what compose_video will require: the project_video clip sections and the form fields. Use this to iterate on a descriptor in milliseconds before the slower compose_video render.

Input parameters:

- `template` (object, required)

Output parameters:

- `formFields` (array)
- `orientation` (string|null)
- `requiredClips` (array)
- `sectionCount` (number)
- `valid` (boolean)

### `compose_video` (~111 tokens)

Compose Video

Render a video from an inline template descriptor (`template`). Supply user clips via userVideoPaths (absolute paths under the configured media dir) for each project_video section, optional form `fields`, and an optional `locale`. Renders in a forked worker and returns the output mp4 path plus duration/codec metadata.

Input parameters:

- `fields` (object)
- `locale` (string)
- `outputBaseName` (string)
- `template` (object, required)
- `userVideoPaths` (object)

Output parameters:

- `audioCodec` (string|null)
- `durationSeconds` (number|null)
- `outputPath` (string)
- `renderId` (string)
- `sizeBytes` (number)
- `videoCodec` (string|null)

### `probe_media` (~59 tokens)

Probe Media

Inspect a local media file (absolute path under the configured media dir) and return its duration, video/audio codecs, audio sample rate, and byte size. Probes via ffprobe directly so it never writes to stdout.

Input parameters:

- `path` (string, required)

Output parameters:

- `audioCodec` (string|null)
- `durationSeconds` (number|null)
- `sampleRate` (number|null)
- `sizeBytes` (number)
- `videoCodec` (string|null)

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/dev-leclap-video/leclap-mcp#diagnostics

## Score history

- 2026-09-23: 84
- 2026-09-22: 83
- 2026-09-21: 83
- 2026-09-20: 82
- 2026-09-19: 82
- 2026-09-18: 81
- 2026-09-17: 81
- 2026-09-16: 80
- 2026-09-15: 80
- 2026-09-14: 79
- 2026-09-13: 79
- 2026-09-12: 78
- 2026-09-11: 78
- 2026-09-10: 78
- 2026-09-09: 77
- 2026-09-08: 77
- 2026-09-07: 76
- 2026-09-06: 76
- 2026-09-05: 75
- 2026-09-04: 75
- 2026-09-03: 74
- 2026-09-02: 74
- 2026-09-01: 73
- 2026-08-31: 70
- 2026-08-30: 70
- 2026-08-29: 70
- 2026-08-28: 70
- 2026-08-27: 70
- 2026-08-26: 70
- 2026-08-25: 68

## Common questions

### What is the LeClap MCP server?

LeClap is an MCP server listed in the public MCP registry as dev.leclap/video. Compose and render video from one JSON template. Deterministic, runs locally, no generative model. This page covers its npm package (@leclap/mcp).

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

LeClap scores 84 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 23 September 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 LeClap MCP server expose?

LeClap exposes 5 tools: ping, get_template_schema, validate_template, compose_video, probe_media. Their descriptions and schemas cost roughly 301 tokens of context every time the server is loaded.

### Is the LeClap MCP server still maintained?

LeClap is still listed as active in the MCP registry. We last reached this channel on 23 September 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 LeClap MCP server under?

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

## Links

- npm package: https://www.npmjs.com/package/@leclap/mcp
- Socket report: https://socket.dev/npm/package/@leclap/mcp
- Repository: https://github.com/heristop/leclap
- Website: https://leclap.dev/
- Changelog RSS feed: https://verifymcp.io/servers/dev-leclap-video/leclap-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/dev-leclap-video/leclap-mcp.json
- HTML version of this page: https://verifymcp.io/servers/dev-leclap-video/leclap-mcp