io.github.tci-nebula/mermaid-render-mcp
NPM · MERMAID-RENDER-MCP · SCANNED SEP 20
Renders Mermaid diagram syntax to PNG or SVG images for LLM clients
Available components
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. How we score → Why this is hard to score →
Supply Chain Security98
- No malware found by supply-chain analysis.Pass
- No known CVEs affecting this package version or its production dependencies.Pass
- No install/post-install scripts declared.Pass
- 108 of 269 dependencies flagged as unhealthy. View diagnostics → Partial
Provenance & Transparency48
- Source repository is publicly reachable at the declared URL. View diagnostics → Pass
- Provenance check failed: no build-provenance attestation is published. See how to fix → View diagnostics → Fail
- Clear OSI-approved license (MIT).Pass
- Actively maintained (last published 31 days ago).Pass
- Publishes a security disclosure policy (SECURITY.md).Pass
Schema Quality & AI Usability77
- AI-judged instruction clarity (excellent).Pass
- Context-footprint check failed: tool/resource definitions use about 221 tokens (~221/item across 1 items; 1 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 Management83
- Stability observed for 25 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 1 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 1 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 io.github.tci-nebula/mermaid-render-mcp server?
io.github.tci-nebula/mermaid-render-mcp runs locally as an npm package, launched with npx -y mermaid-render-mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
npm · mermaid-render-mcp
claude mcp add tci-nebula-mermaid-render-mcp -- npx -y mermaid-render-mcp
{
"mcpServers": {
"tci-nebula-mermaid-render-mcp": {
"command": "npx",
"args": [
"-y",
"mermaid-render-mcp"
]
}
}
} {
"servers": {
"tci-nebula-mermaid-render-mcp": {
"command": "npx",
"args": [
"-y",
"mermaid-render-mcp"
]
}
}
} codex mcp add tci-nebula-mermaid-render-mcp -- npx -y mermaid-render-mcp
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"tci-nebula-mermaid-render-mcp": {
"type": "local",
"command": [
"npx",
"-y",
"mermaid-render-mcp"
],
"enabled": true
}
}
} openclaw mcp add tci-nebula-mermaid-render-mcp --command npx --arg -y --arg mermaid-render-mcp
mcp_servers:
tci-nebula-mermaid-render-mcp:
command: "npx"
args: ["-y", "mermaid-render-mcp"] {
"McpServers": {
"tci-nebula-mermaid-render-mcp": {
"Transport": "stdio",
"Command": "npx",
"Arguments": [
"-y",
"mermaid-render-mcp"
]
}
}
} assistant mcp add tci-nebula-mermaid-render-mcp -t stdio -c npx -a -y mermaid-render-mcp
{
"mcpServers": {
"tci-nebula-mermaid-render-mcp": {
"command": "npx",
"args": [
"-y",
"mermaid-render-mcp"
]
}
}
} 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.
- 19 Sept 26 −3
- Stability: pass → 0.80 functional
- 18 Sept 26 +1
- Stability: 0.97 → pass security
- 16 Sept 26 +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.
- 15 Sept 26 0
- Package version: 1.2.0 → 1.3.0 functional
- 14 Sept 26 +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.
- 11 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 73 to 77. That category is still filling its 30-day observation window: 22 days of observed history at the previous scan, 23 at this one. The score rises as the window fills, whether or not the server changes.
- 9 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 67 to 70. That category is still filling its 30-day observation window: 20 days of observed history at the previous scan, 21 at this one. The score rises as the window fills, whether or not the server changes.
- 7 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 60 to 63. That category is still filling its 30-day observation window: 18 days of observed history at the previous scan, 19 at this one. The score rises as the window fills, whether or not the server changes.
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 · Analysed npm/mermaid-render-mcp@1.3.0
Provenance No attestation
The registry publishes no build provenance for this version, so there is nothing to verify.
| Result | No attestation |
|---|---|
| Ecosystem | npm |
Background: How many MCP packages publish verified provenance →
Dependencies 269 packages
| Packages resolved | 269 |
|---|---|
| Stale | 108 |
| Tree resolution | Complete |
Background: SBOMs and build attestations, explained →
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 →
render_diagram ~221
Render Mermaid diagram syntax into a PNG, SVG, or PDF — or convert it to an editable draw.io (.drawio) file. Returns the result as base64-encoded data (drawio: XML text), or writes it to output_path if given. drawio format supports flowcharts only.
| Name | Type | Req | Description |
|---|---|---|---|
| background | string | – | Background colour (CSS colour string or "transparent"). |
| format | string | – | Output format. Defaults to png. drawio produces an editable draw.io XML file (flowcharts only). |
| output_path | string | – | Absolute file path to write the result to. When given, the file is written to disk and no base64 data is returned — useful for documents destined for printing or formal submission. |
| pdfFit | boolean | – | Scale the PDF page to fit the diagram (PDF only). |
| syntax | string | yes | Mermaid diagram definition (e.g. flowchart, sequenceDiagram, etc.) |
| theme | string | – | Visual theme for the diagram. |
| width | number | – | Canvas width in pixels (PNG only). |
No output schema declared.
No examples provided.
What is the io.github.tci-nebula/mermaid-render-mcp server?
io.github.tci-nebula/mermaid-render-mcp is listed in the public MCP registry as io.github.tci-nebula/mermaid-render-mcp. Renders Mermaid diagram syntax to PNG or SVG images for LLM clients. This page covers its npm package (mermaid-render-mcp).
Is the io.github.tci-nebula/mermaid-render-mcp server safe to use?
io.github.tci-nebula/mermaid-render-mcp scores 82 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 20 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 io.github.tci-nebula/mermaid-render-mcp server expose?
io.github.tci-nebula/mermaid-render-mcp exposes 1 tool: render_diagram. Their descriptions and schemas cost roughly 221 tokens of context every time the server is loaded.
Is the io.github.tci-nebula/mermaid-render-mcp server still maintained?
io.github.tci-nebula/mermaid-render-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.
What licence is the io.github.tci-nebula/mermaid-render-mcp server under?
io.github.tci-nebula/mermaid-render-mcp declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.