com.mermaidchart/mermaid-mcp
REMOTE · MCP.MERMAIDCHART.COM · 2 COMPONENTS · SCANNED SEP 20
MCP server for Mermaid diagram validation and rendering
Available components
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. How we score → Why this is hard to score →
Endpoint Security57
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation not fully verified: no authorisation is required to call this server, and 25 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe. See how to fix → View diagnostics → Unverified
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability68
- AI-judged instruction clarity (good).Pass
- Context-footprint check failed: tool/resource definitions use about 3828 tokens (~153/item across 25 items; 25 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management100
- No destabilizing schema changes in the last 30 days.Pass
Tool Coverage91
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 72% of tool parameters carry a description.Partial
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 25 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 25 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
How do I install the com.mermaidchart/mermaid-mcp server?
com.mermaidchart/mermaid-mcp is a hosted endpoint at https://mcp.mermaidchart.com/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.
remote · mcp.mermaidchart.com
claude mcp add --transport http com-mermaidchart-mermaid-mcp 'https://mcp.mermaidchart.com/mcp'
{
"mcpServers": {
"com-mermaidchart-mermaid-mcp": {
"url": "https://mcp.mermaidchart.com/mcp"
}
}
} {
"servers": {
"com-mermaidchart-mermaid-mcp": {
"type": "http",
"url": "https://mcp.mermaidchart.com/mcp"
}
}
} [mcp_servers.com-mermaidchart-mermaid-mcp] url = "https://mcp.mermaidchart.com/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"com-mermaidchart-mermaid-mcp": {
"type": "remote",
"url": "https://mcp.mermaidchart.com/mcp",
"enabled": true
}
}
} openclaw mcp add com-mermaidchart-mermaid-mcp --url 'https://mcp.mermaidchart.com/mcp' --transport streamable-http
mcp_servers:
com-mermaidchart-mermaid-mcp:
url: "https://mcp.mermaidchart.com/mcp" {
"McpServers": {
"com-mermaidchart-mermaid-mcp": {
"Transport": "http",
"Url": "https://mcp.mermaidchart.com/mcp"
}
}
} assistant mcp add com-mermaidchart-mermaid-mcp -t streamable-http -u 'https://mcp.mermaidchart.com/mcp'
{
"mcpServers": {
"com-mermaidchart-mermaid-mcp": {
"type": "http",
"url": "https://mcp.mermaidchart.com/mcp"
}
}
} The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 26 Aug 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 25 Aug 26 +1
- Stability: 0.97 → pass security
- 24 Aug 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 93 to 97. That category is still filling its 30-day observation window: 28 days of observed history at the previous scan, 29 at this one. The score rises as the window fills, whether or not the server changes.
- 11 Aug 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 31 Jul 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 30 Jul 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 27 Jul 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 26 Jul 26 0
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 20 Sept 2026 · Probed https://mcp.mermaidchart.com/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=*.mcp-prod.mdct.co | CN=Amazon RSA 2048 M04,O=Amazon,C=US | 6 Aug 2026 | 19 Feb 2027 | RSA 2048 | SHA256-RSA | f17539f09d9d79087f946d12efbb5ea |
| SANs: *.mcp-prod.mdct.co, mcp2.mermaidchart.com, mcp.mermaidchart.com, mcp.mermaid.ai | ||||||
| CN=Amazon RSA 2048 M04,O=Amazon,C=US (CA) | CN=Amazon Root CA 1,O=Amazon,C=US | 23 Aug 2022 | 23 Aug 2030 | RSA 2048 | SHA256-RSA | 773124f2a952e3ed18a58bdb85d1bc0ce5f27 |
| CN=Amazon Root CA 1,O=Amazon,C=US (CA) | CN=Starfield Services Root Certificate Authority - G2,O=Starfield Technologies\, Inc.,L=Scottsdale,ST=Arizona,C=US | 25 May 2015 | 31 Dec 2037 | RSA 2048 | SHA256-RSA | 67f944a2a27cdf3fac2ae2b01f908eeb9c4c6 |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of mcp.mermaidchart.com. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| mermaidchart.com. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
| Header | Value |
|---|---|
| content-security-policy | default-src 'none'; |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://mcp.mermaidchart.com/mcp | Verified | 200 | |
| http (plaintext) | http://mcp.mermaidchart.com/mcp | HTTPS enforced | 301 | https://mcp.mermaidchart.com:443/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
create_issue ~115
Create an issue in a GitHub repository. REQUIRES: `Github-Token` (HTTP) or GITHUB_TOKEN with issues write if creating issues in private repos.
| Name | Type | Req | Description |
|---|---|---|---|
| body | string | – | Issue body in markdown. |
| clientName | string | yes | REQUIRED: The name of the client/agent using the MCP server for analytics tracking. |
| labels | array | – | Label names (must already exist in the repository). |
| owner | string | yes | – |
| repo | string | yes | – |
| title | string | yes | – |
No output schema declared.
No examples provided.
create_pr ~203
Create a new branch (git ref), one commit from the base tree with your file changes, then open a pull request in the same repository. REQUIRES: `Github-Token` (HTTP) or GITHUB_TOKEN with `contents: write` (and no existing branch with the same `headBranch` name).
| Name | Type | Req | Description |
|---|---|---|---|
| baseBranch | string | – | Branch to base the PR on (e.g. main). Defaults to the repo default branch. |
| body | string | yes | PR description (markdown). |
| clientName | string | yes | REQUIRED: The name of the client/agent using the MCP server for analytics tracking. |
| commitMessage | string | yes | Single commit message for the file changes. |
| files | array | yes | Files to add or update. |
| headBranch | string | yes | Name of the new branch (must not already exist on the remote). |
| owner | string | yes | – |
| repo | string | yes | – |
| title | string | yes | – |
No output schema declared.
No examples provided.
generate_jira_kanban_board ~215
Generate a Mermaid kanban board from Jira issues. Issues are grouped into columns by their current status and ordered by workflow stage (To Do → In Progress → Done). Each card shows the issue summary and is a clickable link to the ticket, with optional assignee and priority badges.
| Name | Type | Req | Description |
|---|---|---|---|
| assignee | string | – | Filter by assignee — Jira account ID, display name, or 'currentUser()'. |
| clientName | string | yes | REQUIRED: The name of the client/agent using the MCP server for analytics tracking. |
| issueType | string | – | Filter by issue type, e.g. 'Story', 'Bug', 'Task'. |
| maxResults | integer | – | Maximum number of issues to fetch (1–100, default 50). |
| projectKey | string | yes | REQUIRED: Jira project key, e.g. 'PROJ' or 'MYTEAM'. |
| sprint | string | – | Filter by sprint name or numeric ID, e.g. 'Sprint 12' or '42'. |
No output schema declared.
No examples provided.
generate_ticket_dependency_tree ~371
Generate a Mermaid flowchart that visualises Jira issue dependency links for a project. Each node shows the ticket key, summary, and status, and is a clickable link to the ticket. Dashed nodes represent issues linked from outside the current filter set.
| Name | Type | Req | Description |
|---|---|---|---|
| assignee | string | – | Filter by assignee — Jira account ID, display name, or 'currentUser()'. |
| clientName | string | yes | REQUIRED: The name of the client/agent using the MCP server for analytics tracking. |
| colorMode | string | – | Color scheme for the diagram: 'light' (default pastel fills), 'dark' (deep fills for dark backgrounds), or 'none' (no fill/stroke overrides, inherits the Mermaid theme). |
| createdAfter | string | – | Include only issues created on or after this date, ISO format: '2024-01-15'. |
| createdBefore | string | – | Include only issues created on or before this date, ISO format: '2024-03-31'. |
| maxResults | integer | – | Target number of issues to render in the tree (1–100, default 50). |
| projectKey | string | yes | REQUIRED: Jira project key, e.g. 'PROJ' or 'MYTEAM'. Used as the base JQL project filter. |
| reporter | string | – | Filter by reporter — Jira account ID or display name. |
| sprint | string | – | Filter by sprint name or numeric ID, e.g. 'Sprint 12' or '42'. |
| status | string | – | Filter by issue status, e.g. 'In Progress', 'To Do', 'Done'. |
| useUrlShortener | boolean | – | Shorten the preview/edit URL via Short.io. Disable to get the full unshortened URL (default true). |
No output schema declared.
No examples provided.
generate_ticket_diagram ~185
Generate a Mermaid flowchart centred on a single Jira ticket. Fetches the ticket's subtasks, parent, issue links, and recent comments in one call. The focal ticket is highlighted in indigo; subtasks are grouped in a subgraph; issue links use colour-coded arrows (red thick = blocks, cyan dashed = relates to); comments appear in a rose subgraph.
| Name | Type | Req | Description |
|---|---|---|---|
| clientName | string | yes | REQUIRED: The name of the client/agent using the MCP server for analytics tracking. |
| colorMode | string | – | Color scheme for the diagram: 'light' (default pastel fills), 'dark' (deep fills for dark backgrounds), or 'none' (no fill/stroke overrides, inherits the Mermaid theme). |
| ticketKey | string | yes | REQUIRED: Jira issue key, e.g. 'MC-123' or 'PROJ-42'. |
No output schema declared.
No examples provided.
generate_ticket_timeline ~166
Generate a Mermaid diagram showing the history of a single Jira ticket using its changelog. Two views are available: - **state**: stateDiagram-v2 showing all status transitions with dates and authors, nodes coloured by status category. - **timeline** (default): Mermaid timeline grouped by month, showing status changes, assignee changes, priority changes, sprint moves, and resolutions.
| Name | Type | Req | Description |
|---|---|---|---|
| clientName | string | yes | REQUIRED: The name of the client/agent using the MCP server for analytics tracking. |
| ticketKey | string | yes | REQUIRED: Jira issue key, e.g. 'MC-123' or 'PROJ-42'. |
| view | string | – | Diagram view to generate. 'state' shows status transitions; 'timeline' shows all field changes over time. |
No output schema declared.
No examples provided.
get_diagram_summary ~139
Generate a concise summary for a Mermaid diagram based on its content. This tool provides prompts for the LLM to generate a brief summary (2-4 sentences) highlighting the primary flow, key decisions, and outcomes.
| Name | Type | Req | Description |
|---|---|---|---|
| clientName | string | yes | REQUIRED: The name of the client/agent using the MCP server (e.g., 'claude', 'cursor', 'vscode', 'chatgpt', 'copilot') for analytics tracking. |
| contextHint | string | – | Optional: Context hint to help generate a more accurate summary. |
| diagramContent | string | yes | The Mermaid diagram content/code for which to generate a summary. |
No output schema declared.
No examples provided.
get_diagram_title ~163
Generate a descriptive title for a Mermaid diagram based on its content. This tool analyzes the diagram structure and content to suggest an appropriate title.
| Name | Type | Req | Description |
|---|---|---|---|
| clientName | string | yes | REQUIRED: The name of the client/agent using the MCP server (e.g., 'claude', 'cursor', 'vscode', 'chatgpt', 'copilot') for analytics tracking. |
| currentTitle | string | – | Optional: The current title of the diagram, if any, for context. |
| diagramContent | string | yes | The Mermaid diagram content/code for which to generate a title. |
| diagramType | string | – | Optional: The type of Mermaid diagram (e.g., 'flowchart', 'sequenceDiagram', 'gantt') for better context in title generation. |
No output schema declared.
No examples provided.
get_issue_comments ~118
List comments on an issue by issue number. REQUIRES: `Github-Token` (HTTP) or GITHUB_TOKEN / GH_TOKEN.
| Name | Type | Req | Description |
|---|---|---|---|
| clientName | string | yes | REQUIRED: The name of the client/agent using the MCP server for analytics tracking. |
| issue_number | integer | yes | Issue number (not a PR number unless the PR is also addressed as an issue on GitHub). |
| owner | string | yes | – |
| page | integer | – | – |
| per_page | integer | – | – |
| repo | string | yes | – |
No output schema declared.
No examples provided.
get_mermaid_syntax_document ~145
Get comprehensive syntax documentation and examples for a specific Mermaid diagram type. Returns the official Mermaid.js documentation with syntax rules, examples, and usage instructions for the requested diagram type.
| Name | Type | Req | Description |
|---|---|---|---|
| clientName | string | yes | REQUIRED: The name of the client/agent using the MCP server (e.g., 'claude', 'cursor', 'vscode', 'chatgpt', 'copilot') for analytics tracking. |
| diagramType | string | yes | The type of Mermaid diagram to get syntax documentation for (e.g., 'flowchart', 'sequenceDiagram', 'architecture-beta', 'gantt', 'gitgraph', 'classDiagram', 'stateDiagram', etc.). |
No output schema declared.
No examples provided.
get_notion_mermaid_diagram_by_block_id ~91
Retrieve a single Mermaid diagram block by its block ID. Returns the diagram code and optional caption.
| Name | Type | Req | Description |
|---|---|---|---|
| blockId | string | yes | The Notion block ID of the mermaid code block (e.g. from get_notion_page_mermaid_diagrams). |
| clientName | string | yes | REQUIRED: The name of the client/agent using the MCP server for analytics tracking. |
No output schema declared.
No examples provided.
get_notion_page_mermaid_diagrams ~94
Extract all Mermaid code blocks from a Notion page. Returns block ID, diagram code, and optional caption for each block.
| Name | Type | Req | Description |
|---|---|---|---|
| clientName | string | yes | REQUIRED: The name of the client/agent using the MCP server for analytics tracking. |
| pageUrl | string | yes | URL of the Notion page (e.g. https://www.notion.so/My-Page-abc123...). |
No output schema declared.
No examples provided.
get_pull_comments ~127
Get all pull request comments: both issue/PR thread comments and inline review comments, with a `type` of `issue_thread` or `review` per item. REQUIRES: `Github-Token` (HTTP) or GITHUB_TOKEN / GH_TOKEN.
| Name | Type | Req | Description |
|---|---|---|---|
| clientName | string | yes | REQUIRED: The name of the client/agent using the MCP server for analytics tracking. |
| owner | string | yes | – |
| page | integer | – | – |
| per_page | integer | – | – |
| pull_number | integer | yes | Pull request number. |
| repo | string | yes | – |
No output schema declared.
No examples provided.
insert_notion_mermaid_diagram ~107
Append a Mermaid diagram as a code block to a Notion page. The block is added at the end of the page content.
| Name | Type | Req | Description |
|---|---|---|---|
| caption | string | – | Optional caption displayed below the code block. |
| clientName | string | yes | REQUIRED: The name of the client/agent using the MCP server for analytics tracking. |
| code | string | yes | Mermaid diagram source code. |
| pageUrl | string | yes | URL of the Notion page to insert the diagram into. |
No output schema declared.
No examples provided.
list_branches ~183
List or resolve branch names. **List mode (default):** one `GET /repos/.../branches?per_page=100&page=1` — at most 100 names, A–Z sorted in the response; `has_more` if a full page was returned. **Resolve mode:** set `branch_name` for a single `GET` branch (404 if missing). At most one GitHub API call. REQUIRES: `Github-Token` (HTTP) or GITHUB_TOKEN / GH_TOKEN.
| Name | Type | Req | Description |
|---|---|---|---|
| branch_name | string | – | Exact branch name. When non-empty, returns that branch only. Omit to fetch the first 100 branches only. |
| clientName | string | yes | REQUIRED: The name of the client/agent using the MCP server for analytics tracking. |
| owner | string | yes | – |
| repo | string | yes | – |
No output schema declared.
No examples provided.
list_issues ~151
List issues for a repository (excludes pull requests). REQUIRES: `Github-Token` (HTTP) or GITHUB_TOKEN / GH_TOKEN.
| Name | Type | Req | Description |
|---|---|---|---|
| clientName | string | yes | REQUIRED: The name of the client/agent using the MCP server for analytics tracking. |
| direction | string | – | – |
| labels | string | – | Comma-separated label names (GitHub API format). |
| owner | string | yes | – |
| page | integer | – | – |
| per_page | integer | – | – |
| repo | string | yes | – |
| since | string | – | ISO 8601: only issues updated at or after this time. |
| sort | string | – | – |
| state | string | – | – |
No output schema declared.
No examples provided.
list_mermaid_files ~117
List .mmd Mermaid files in a GitHub repository (code search with tree fallback). REQUIRES: `Github-Token` header (HTTP) or GITHUB_TOKEN / GH_TOKEN.
| Name | Type | Req | Description |
|---|---|---|---|
| clientName | string | yes | REQUIRED: The name of the client/agent using the MCP server for analytics tracking. |
| owner | string | yes | Repository owner (user or organization). |
| ref | string | – | Optional branch, tag, or commit for tree fallback when code search is unavailable. |
| repo | string | yes | Repository name. |
No output schema declared.
No examples provided.
list_pulls ~98
List pull requests for a GitHub repository. REQUIRES: `Github-Token` (HTTP) or GITHUB_TOKEN / GH_TOKEN.
| Name | Type | Req | Description |
|---|---|---|---|
| clientName | string | yes | REQUIRED: The name of the client/agent using the MCP server for analytics tracking. |
| owner | string | yes | – |
| page | integer | – | – |
| per_page | integer | – | – |
| repo | string | yes | – |
| state | string | – | – |
No output schema declared.
No examples provided.
list_repos ~143
List GitHub repositories for the authenticated user, or for an organization when `org` is set. REQUIRES: `Github-Token` header (HTTP) or `GITHUB_TOKEN` / `GH_TOKEN` in the server environment.
| Name | Type | Req | Description |
|---|---|---|---|
| clientName | string | yes | REQUIRED: The name of the client/agent using the MCP server for analytics tracking. |
| org | string | – | Optional: organization login. If set, lists that org's repositories; otherwise lists repos for the authenticated user. |
| page | integer | – | – |
| per_page | integer | – | – |
| type | string | – | User repo filter; ignored when `org` is set. |
No output schema declared.
No examples provided.
list_tools ~68
Lists all available MCP servers and their tools in the workspace.
| Name | Type | Req | Description |
|---|---|---|---|
| clientName | string | – | OPTIONAL: The name of the client/agent using the MCP server (e.g., 'claude', 'cursor', 'vscode', 'chatgpt', 'copilot') for analytics tracking. |
No output schema declared.
No examples provided.
push_file ~142
Create or update a single file on a given branch in a GitHub repository. REQUIRES: `Github-Token` (HTTP) or GITHUB_TOKEN with contents write access.
| Name | Type | Req | Description |
|---|---|---|---|
| branch | string | yes | Branch to commit to. |
| clientName | string | yes | REQUIRED: The name of the client/agent using the MCP server for analytics tracking. |
| content | string | yes | Full file content. |
| message | string | yes | Commit message. |
| owner | string | yes | – |
| path | string | yes | – |
| repo | string | yes | – |
| sha | string | – | Existing blob SHA to update; omit to create or to let the service detect. |
No output schema declared.
No examples provided.
read_mermaid_file ~131
Read a single .mmd file from a GitHub repository. Only paths ending in .mmd are allowed. REQUIRES: `Github-Token` header (HTTP) or GITHUB_TOKEN / GH_TOKEN.
| Name | Type | Req | Description |
|---|---|---|---|
| clientName | string | yes | REQUIRED: The name of the client/agent using the MCP server for analytics tracking. |
| owner | string | yes | – |
| path | string | yes | Path to the .mmd file in the repository. |
| ref | string | – | Optional: branch, tag, or commit SHA; defaults to the default branch. |
| repo | string | yes | – |
No output schema declared.
No examples provided.
search_mermaid_icons ~238
Search for available Mermaid icons by provider or name. Returns icons in ready-to-use format with provider prefixes (e.g., 'aws:arch-amazon-ec2'). PERFORMANCE TIP: For faster searches, start with limit=10 and specific queries. If no suitable icons found, increase limit and retry. Supports AWS, Azure, GCP, and FontAwesome icon sets.
| Name | Type | Req | Description |
|---|---|---|---|
| clientName | string | yes | REQUIRED: The name of the client/agent using the MCP server (e.g., 'claude', 'cursor', 'vscode', 'chatgpt', 'copilot') for analytics tracking. |
| limit | number | – | Optional: Maximum number of results to return per provider. Defaults to 10 for performance. Increase if needed. |
| provider | string | – | Optional: Filter by specific provider ('aws', 'azure', 'gcp', 'fa'). If not provided, searches all providers. |
| query | string | yes | Search query for icons (e.g., 'aws', 'azure', 'gcp', 'fa', 'lambda', 's3', 'database'). Use specific terms for better results. |
No output schema declared.
No examples provided.
update_notion_mermaid_diagram ~110
Update the Mermaid source code (and optional caption) of an existing mermaid code block by its block ID.
| Name | Type | Req | Description |
|---|---|---|---|
| blockId | string | yes | The Notion block ID of the mermaid code block to update. |
| caption | string | – | Optional new caption. Omit to clear the existing caption. |
| clientName | string | yes | REQUIRED: The name of the client/agent using the MCP server for analytics tracking. |
| code | string | yes | New Mermaid diagram source code. |
No output schema declared.
No examples provided.
validate_and_render_mermaid_diagram ~208
SIMPLE RENDER TOOL - Renders Mermaid diagrams directly (Mermaid automatically validates during rendering). If successful, returns diagram image. If Mermaid validation fails, returns error details for fixing. One tool, one call, simple workflow.
| Name | Type | Req | Description |
|---|---|---|---|
| clientName | string | yes | REQUIRED: The name of the client/agent using the MCP server (e.g., 'claude', 'cursor', 'vscode', 'chatgpt', 'copilot') for analytics tracking. |
| diagramType | string | yes | The type of Mermaid diagram (e.g., 'flowchart', 'sequenceDiagram', 'gantt'). |
| mermaidCode | string | yes | Mermaid code to render. Mermaid validates automatically during rendering - if invalid, tool returns error details for fixing. |
| prompt | string | yes | A text description of the diagram to generate. |
| useUrlShortener | boolean | – | Whether to use URL shortening for the Mermaid link. Defaults to true, set to false to disable shortening. |
No output schema declared.
No examples provided.
What is the com.mermaidchart/mermaid-mcp server?
com.mermaidchart/mermaid-mcp is listed in the public MCP registry as com.mermaidchart/mermaid-mcp. MCP server for Mermaid diagram validation and rendering. This page covers its hosted endpoint (https://mcp.mermaidchart.com/mcp).
Is the com.mermaidchart/mermaid-mcp server safe to use?
com.mermaidchart/mermaid-mcp scores 76 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 com.mermaidchart/mermaid-mcp server expose?
com.mermaidchart/mermaid-mcp exposes 25 tools: validate_and_render_mermaid_diagram, get_diagram_title, get_diagram_summary, search_mermaid_icons, get_mermaid_syntax_document, and 20 more. Their descriptions and schemas cost roughly 3,828 tokens of context every time the server is loaded.
Does the com.mermaidchart/mermaid-mcp server require authentication?
No. We connected to com.mermaidchart/mermaid-mcp without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the com.mermaidchart/mermaid-mcp server still maintained?
com.mermaidchart/mermaid-mcp is still listed as active in the MCP registry. We last reached this channel on 20 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.