# Diagrams MCP (remote · diagrams-mcp-production.up.railway.app)

Generate cloud architecture diagrams, flowcharts, and sequence diagrams.

- Trust score: 66/100 (medium)
- Change this week: +5
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- remote · `diagrams-mcp-production.up.railway.app`: 66/100 (this document), [markdown](https://verifymcp.io/servers/mskry-diagrams-mcp-server/diagrams-mcp-production.md), [page](https://verifymcp.io/servers/mskry-diagrams-mcp-server/diagrams-mcp-production)
- pypi · `diagrams-mcp-server`: 10/100, [markdown](https://verifymcp.io/servers/mskry-diagrams-mcp-server/diagrams-mcp-server.md), [page](https://verifymcp.io/servers/mskry-diagrams-mcp-server/diagrams-mcp-server)

## Channel facts

- Endpoint: `https://diagrams-mcp-production.up.railway.app/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `0.1.2`

## 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**: 57/100
  - 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 9 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 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**: 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 (excellent).
  - Context-footprint check failed: tool/resource definitions use about 1788 tokens (~127/item across 14 items; 9 tools + 5 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 27/100
  - Stability observed for 8 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **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 (67% of tools); any adoption earns full credit.
- **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 mskry-diagrams-mcp-server https://diagrams-mcp-production.up.railway.app/mcp
```

### Codex

```toml
[mcp_servers.mskry-diagrams-mcp-server]
url = "https://diagrams-mcp-production.up.railway.app/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "mskry-diagrams-mcp-server": {
      "type": "remote",
      "url": "https://diagrams-mcp-production.up.railway.app/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add mskry-diagrams-mcp-server --url https://diagrams-mcp-production.up.railway.app/mcp --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  mskry-diagrams-mcp-server:
    url: "https://diagrams-mcp-production.up.railway.app/mcp"
```

### Other

```json
{
  "mcpServers": {
    "mskry-diagrams-mcp-server": {
      "type": "http",
      "url": "https://diagrams-mcp-production.up.railway.app/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.

### 2026-08-03 (score 66, +1)

- [functional] New prompt “sequence_flow”
- [functional] New prompt “quick_sketch”
- [functional] New prompt “compare_providers”
- [functional] New prompt “architecture_diagram”

### 2026-08-01 (score 65, +1)

No change was recorded against any check on this day. Stability & Change Management went from 17 to 20. That category is still filling its 30-day observation window: 5 days of observed history at the previous scan, 6 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-07-31 (score 64, +1)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-30 (score 63, 0)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-29 (score 63, +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.

### 2026-07-28 (score 62, +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.

### 2026-07-27 (score 61, 0)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-26 (score 61)

First indexed and scored.

## MCP tools (9)

### `render_diagram` (~258 tokens)

Render a mingrammer/diagrams Python snippet to PNG and return the image.

The code must be a complete Python script using `from diagrams import ...` imports
and a `with Diagram(...)` context manager block.

Use search_nodes to verify node names and get correct import paths before writing code.
Read the diagrams://reference/diagram, diagrams://reference/edge, and
diagrams://reference/cluster resources for constructor options and usage examples.

Args:
    code: Full Python code using the diagrams library.
    filename: Output filename without extension.
    format: Output format — ``"png"`` (default), ``"svg"``, or ``"pdf"``.
    download_link: If True, return a temporary download URL path
                   (/images/{token}) that expires after 15 minutes; if
                   False, return inline image bytes. Defaults to True
                   (URL) — set ``DIAGRAMS_INLINE_DEFAULT=true`` on the
                   server to flip the default. SVG/PDF and PNGs larger
                   than the inline limit always use a download link.

Input parameters:

- `code` (string, required)
- `download_link`
- `filename` (string)
- `format` (string)

### `list_providers` (~52 tokens)

List all available diagram providers (aws, gcp, azure, k8s, onprem, etc.).

Use list_providers -> list_services -> list_nodes to browse available node types
for a specific provider.

Output parameters:

- `result` (array)

### `list_services` (~65 tokens)

List service categories for a provider (e.g. 'aws' -> ['compute', 'database', ...]).

Args:
    provider: Provider name from list_providers (e.g. 'aws', 'gcp', 'k8s').

Input parameters:

- `provider` (string, required)

Output parameters:

- `result` (array)

### `list_nodes` (~92 tokens)

List available node classes for a provider.service combo.

Args:
    provider: Provider name (e.g. 'aws', 'gcp', 'k8s').
    service: Service category (e.g. 'compute', 'database', 'network').

Returns:
    List of nodes with keys: name, import, alias_of (optional).

Input parameters:

- `provider` (string, required)
- `service` (string, required)

Output parameters:

- `result` (array)

### `search_nodes` (~100 tokens)

Search for diagram nodes by keyword across all providers and services.

For targeted browsing when you know the provider, use list_providers -> list_services ->
list_nodes instead.

Args:
    query: Search term (case-insensitive substring match).

Returns:
    List of matching nodes with keys: node, provider, service, import, alias_of (optional).
    Sorted by relevance: exact match first, then prefix, then substring.

Input parameters:

- `query` (string, required)

Output parameters:

- `result` (array)

### `render_mermaid` (~238 tokens)

Render a Mermaid diagram definition and return the image with metadata.

The definition should be valid Mermaid syntax (e.g. flowchart, sequence,
class, ER, state, or Gantt diagram).

Returns a list of content blocks: the rendered image plus a JSON text
block with metadata including a mermaid.live edit link for opening the
diagram in a browser editor.

Args:
    definition: Mermaid diagram definition text.
    filename: Output filename without extension.
    format: Output format — ``"png"`` (default), ``"svg"``, or ``"pdf"``.
    download_link: If True, return a temporary download URL path
                   (/images/{token}) that expires after 15 minutes; if
                   False, return inline image bytes. Defaults to True
                   (URL) — set ``DIAGRAMS_INLINE_DEFAULT=true`` on the
                   server to flip the default. SVG/PDF and PNGs larger
                   than the inline limit always use a download link.

Input parameters:

- `definition` (string, required)
- `download_link`
- `filename` (string)
- `format` (string)

### `render_plantuml` (~216 tokens)

Render a PlantUML diagram definition and return the image.

The definition should be valid PlantUML syntax wrapped in @startuml/@enduml
(sequence, class, component, activity, state, deployment, etc.).

Args:
    definition: PlantUML diagram definition text.
    filename: Output filename without extension.
    format: Output format — ``"png"`` (default) or ``"svg"``.
            PDF is not supported (requires Batik/FOP).
    download_link: If True, return a temporary download URL path
                   (/images/{token}) that expires after 15 minutes; if
                   False, return inline image bytes. Defaults to True
                   (URL) — set ``DIAGRAMS_INLINE_DEFAULT=true`` on the
                   server to flip the default. SVG and PNGs larger than
                   the inline limit always use a download link.

Input parameters:

- `definition` (string, required)
- `download_link`
- `filename` (string)
- `format` (string)

### `find_equivalent` (~234 tokens)

Find cross-provider equivalents for a diagram node by infrastructure role.

Given a node name (e.g. 'EC2', 'Lambda', 'ComputeEngine'), returns the
infrastructure role category it belongs to and the equivalent nodes from
other providers.

If a node name is ambiguous, use list_categories to see all mapped roles
and pick a provider-specific node name.

Args:
    node: Node class name to look up (case-insensitive, e.g. 'EC2', 'lambda').
    target_provider: Optional provider to filter equivalents to
        (e.g. 'gcp', 'azure', 'aws').  If omitted, all equivalents
        across all other providers are returned.

Returns:
    A dict with keys:
        category (str): Infrastructure role category name.
        description (str): Human-readable description of the category.
        source (dict): The matched node with keys node, provider, service, import.
        equivalents (list[dict]): Equivalent nodes, each with keys
            node, provider, service, import.

Input parameters:

- `node` (string, required)
- `target_provider`

### `list_categories` (~107 tokens)

List all infrastructure role categories with their mapped nodes.

Use this to browse all available equivalence mappings, or to disambiguate
node names when find_equivalent reports ambiguity.

Returns a list of category dicts, each with:
    category (str): Category identifier (e.g. 'virtual_machine').
    description (str): Human-readable description.
    providers (list[str]): Providers covered by this category.
    nodes (dict): Mapping of provider → list of node names in that category.

Output parameters:

- `result` (array)

## Diagnostics

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

## Score history

- 2026-08-03: 66
- 2026-08-02: 65
- 2026-08-01: 65
- 2026-07-31: 64
- 2026-07-30: 63
- 2026-07-29: 63
- 2026-07-28: 62
- 2026-07-27: 61
- 2026-07-26: 61

## Links

- Remote endpoint: https://diagrams-mcp-production.up.railway.app/mcp
- Repository: https://github.com/ByteOverDev/diagrams-mcp
- Changelog RSS feed: https://verifymcp.io/servers/mskry-diagrams-mcp-server/diagrams-mcp-production/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/mskry-diagrams-mcp-server/diagrams-mcp-production/changelog.json
- HTML version of this page: https://verifymcp.io/servers/mskry-diagrams-mcp-server/diagrams-mcp-production