Blueprint Chart
NPM · @BLUEPRINT-CHART/MCP · SCANNED SEP 13
The open chart format an LLM writes and the browser renders — to interactive, accessible SVG.
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
- 72 of 203 dependencies flagged as unhealthy (1 deprecated). View diagnostics → Partial
Provenance & Transparency97
- Source repository is publicly reachable at the declared URL. View diagnostics → Pass
- Cryptographically verified build provenance (signed, bound to blueprint-chart/mcp). View diagnostics → Pass
- Clear OSI-approved license (MIT).Pass
- Actively maintained (last published 14 days ago).Pass
- Disclosure check failed: no security disclosure policy was found in the source repository. See how to fix → Fail
Schema Quality & AI Usability88
- 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).Pass
- AI-judged instruction clarity (excellent).Pass
- Tool/resource definitions use about 3108 tokens (~45/item across 68 items; 11 tools + 57 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management90
- Stability observed for 27 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
- Structured output schemas are declared (100% of tools); any adoption earns full credit.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 11 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 12 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 Blueprint Chart MCP server?
Blueprint Chart runs locally as an npm package, launched with npx -y @blueprint-chart/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 · @blueprint-chart/mcp
claude mcp add blueprint-chart-mcp -- npx -y @blueprint-chart/mcp
{
"mcpServers": {
"blueprint-chart-mcp": {
"command": "npx",
"args": [
"-y",
"@blueprint-chart/mcp"
]
}
}
} {
"servers": {
"blueprint-chart-mcp": {
"command": "npx",
"args": [
"-y",
"@blueprint-chart/mcp"
]
}
}
} codex mcp add blueprint-chart-mcp -- npx -y @blueprint-chart/mcp
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"blueprint-chart-mcp": {
"type": "local",
"command": [
"npx",
"-y",
"@blueprint-chart/mcp"
],
"enabled": true
}
}
} openclaw mcp add blueprint-chart-mcp --command npx --arg -y --arg @blueprint-chart/mcp
mcp_servers:
blueprint-chart-mcp:
command: "npx"
args: ["-y", "@blueprint-chart/mcp"] {
"McpServers": {
"blueprint-chart-mcp": {
"Transport": "stdio",
"Command": "npx",
"Arguments": [
"-y",
"@blueprint-chart/mcp"
]
}
}
} assistant mcp add blueprint-chart-mcp -t stdio -c npx -a -y @blueprint-chart/mcp
{
"mcpServers": {
"blueprint-chart-mcp": {
"command": "npx",
"args": [
"-y",
"@blueprint-chart/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.
- 13 Sept 26 0
- Security disclosure: unverified → fail ▼ functional
- 12 Sept 26 +1
- Security disclosure: fail → unverified ▼ functional
- 10 Sept 26 −3
- Stability: pass → 0.80 functional
- 9 Sept 26 +1
- Stability: 0.97 → pass security
- 8 Sept 26 0
- Security disclosure: unverified → fail ▼ functional
- 7 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.
- 6 Sept 26 0
- Security disclosure: fail → unverified ▼ functional
- 5 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.
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 13 Sept 2026 · Analysed npm/@blueprint-chart/mcp@0.2.1
Provenance Verified
A signed build attestation was found and verified, binding this exact artifact to the source repository it claims to come from.
| Result | Verified |
|---|---|
| Ecosystem | npm |
| Reason | Verified |
| Discovered via | Registry attestation endpoint |
| Source repo | blueprint-chart/mcp |
| Certificate issuer | https://token.actions.githubusercontent.com |
| Certificate SAN | https://github.com/blueprint-chart/mcp/.github/workflows/release.yml@refs/heads/main |
| Rekor log index | 2639705115 |
| Predicate type | https://slsa.dev/provenance/v1 |
| Subject digest | sha512:eeb118b4a566fe0958fb2cfe3ddeb5d257026065d7277ddc110f4c923d61dba8a484bb0ddc7bc888a4be854a6ef5c848b95f8a6e48cb0453cb8d3ff81 |
Background: How many MCP packages publish verified provenance →
Dependencies 203 packages
| Packages resolved | 203 |
|---|---|
| Deprecated | 1 |
| Stale | 72 |
| 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 →
describe_chart_type ~115
Return everything an LLM needs to write a .bpc for a given chart type — typically your second call, after recommend_chart_type. Input: { chartType: "bar-horizontal" } (or any canonical/alias name). Returns summary, when-to-use, when-NOT-to-use, full property list with enum choices, data-shape example, and a pointer to a canonical sample.
| Name | Type | Req | Description |
|---|---|---|---|
| chartType | string | yes | A chart type or alias to describe, e.g. "bar-horizontal" or "line". |
| Name | Type | Req | Description |
|---|---|---|---|
| aliases | array | yes | Accepted alias names. |
| dataShape | object | yes | The data shape this chart type expects. |
| directives | array | yes | Supported directives. |
| docsUrl | string | – | Public docs URL. |
| exampleSlug | string | – | Id of a canonical sample for this type. |
| name | string | yes | Canonical chart-type identifier. |
| properties | array | yes | Supported chart properties. |
| summary | string | yes | One-line description. |
| whenNotToUse | array | yes | Situations to avoid it. |
| whenToUse | array | yes | Situations this chart type fits. |
No examples provided.
export_chart ~181
Turn a validated .bpc source into shareable URLs plus an inline visual preview of what was published. Returns { copyUrl, embedUrl, urls?, frame } and a PNG preview image block so you can confirm the chart looks right before sharing. copyUrl opens an editable copy in the editor; embedUrl is a read-only iframe target; urls.{png,svg,bpc} (when MCP_PUBLIC_URL is set) are stateless rendered-image/source links. Set modelVisible:false to drop the inline preview from the response entirely, spending no image tokens. Requires BLUEPRINT_CHART_EDITOR_URL; preview failures never block the export.
| Name | Type | Req | Description |
|---|---|---|---|
| modelVisible | boolean | – | When false, the preview image is omitted from the response so it costs no image tokens. |
| source | string | yes | The .bpc chart source to validate and publish to shareable URLs. |
| Name | Type | Req | Description |
|---|---|---|---|
| copyUrl | string | yes | Editor URL that opens an editable copy of the chart. |
| embedUrl | string | yes | Read-only iframe-embeddable URL. |
| frame | object | yes | Frame metadata extracted from the chart. |
| previewOmitted | boolean | – | Set when the preview render failed. |
| urls | object | – | Stateless hosted render URLs (only when MCP_PUBLIC_URL is set). |
No examples provided.
get_example ~89
Return a canonical .bpc example. Pass { name } for a specific sample id, { chartType } for the first sample of that type, or no args for a starter sample.
| Name | Type | Req | Description |
|---|---|---|---|
| chartType | string | – | Return the first canonical sample for this chart type (or alias). |
| name | string | – | Return a specific sample by its id, e.g. "co2-emissions". |
| Name | Type | Req | Description |
|---|---|---|---|
| chartType | string | yes | Chart type of the sample. |
| dsl | string | yes | The full .bpc source of the sample. |
| id | string | yes | Sample id. |
| title | string | yes | Sample title. |
No examples provided.
get_grammar ~95
Return the .bpc DSL grammar as markdown. Pass { section: "chart" | "data" | "properties" | "scenes" | "annotations" } for a focused subset, or no args for the full grammar.
| Name | Type | Req | Description |
|---|---|---|---|
| section | string | – | Limit to one grammar section: "chart", "properties", "scenes", or "annotations". Omit (or "all") for the full grammar. |
| Name | Type | Req | Description |
|---|---|---|---|
| section | string | yes | The grammar section returned. |
| text | string | yes | The grammar reference as markdown. |
No examples provided.
inspect_dsl ~73
Parse a .bpc source and return a structured summary: chartType, scenes, data (rowCount, entryCount, labels, seriesNames, multiSeries), annotation/colorize/highlight/area-fill presence flags, series count.
| Name | Type | Req | Description |
|---|---|---|---|
| source | string | yes | The .bpc chart source to parse and summarize. |
| Name | Type | Req | Description |
|---|---|---|---|
| chartType | string | yes | Declared chart type. |
| data | object | yes | Summary of the data block. |
| hasAnnotations | boolean | yes | Whether any annotation/range/note is present. |
| hasAreaFills | boolean | yes | Whether any area-fill is present. |
| hasColorizes | boolean | yes | Whether any non-highlight colorize is present. |
| hasHighlights | boolean | yes | Whether any highlight is present. |
| scenes | array | yes | Per-scene summaries, base chart first (always at least one). |
| seriesCount | integer | yes | Number of series. |
No examples provided.
list_chart_types ~40
Reference list of every chart type the renderer supports, with aliases and one-line summaries. To choose a type for a dataset, call recommend_chart_type instead.
Input schema present but exposes no named parameters.
| Name | Type | Req | Description |
|---|---|---|---|
| chartTypes | array | yes | Every renderable chart type. |
No examples provided.
list_palettes ~32
List every named colour palette with its label and hex colours, for use in `colorPalette = "<name>"`.
Input schema present but exposes no named parameters.
| Name | Type | Req | Description |
|---|---|---|---|
| palettes | array | yes | Every named palette. |
No examples provided.
recommend_chart_type ~145
Start here before writing any .bpc. Takes column types, row count, and the user's goal (a prose sentence — it determines the chart family: comparison/ranking/part-to-whole/composition-over-time/trend/range). Returns ranked chart-type recommendations plus guidance.
| Name | Type | Req | Description |
|---|---|---|---|
| columnTypes | array | yes | The type of each data column, in order: "string", "number", or "date". |
| goal | string | – | Optional prose sentence describing what the chart should show. Determines the chart family (comparison / ranking / part-to-whole / composition-over-time / trend / range). |
| rowCount | integer | yes | Number of data rows in the dataset. |
| Name | Type | Req | Description |
|---|---|---|---|
| guidance | string | – | Prose next-step guidance for the top recommendation. |
| recommendations | array | yes | Ranked chart-type recommendations, best first. |
No examples provided.
render ~402
Render a .bpc source to SVG (default), PNG, or HTML. With format:"png" the chart comes back as an inline IMAGE you and the user can both see — render, look at the result, fix issues, re-render. Always returns structured frame metadata. When MCP_PUBLIC_URL is set the response includes stateless `urls` ({png,svg,bpc}). Set modelVisible:false to drop the inline image from the response entirely, spending no image tokens (reach the image via `urls.png` or `save`). Pass `save:<path>` to write the output into MCP_FS_WRITE_DIR instead of returning it inline. Width/height are capped at 1600; PNGs are rasterized at 2× for retina sharpness.
| Name | Type | Req | Description |
|---|---|---|---|
| format | string | – | Output format. "svg" (default) and "html" return text; "png" returns an inline image you and the user can both see. |
| height | integer | – | Output height in pixels (max 1600). |
| modelVisible | boolean | – | When false, the inline PNG is omitted from the response so it costs no image tokens; use it for bulk renders, with `urls.png` or `save` to reach the image. |
| save | string | – | Optional output path, always resolved inside MCP_FS_WRITE_DIR (relative paths are joined to it; absolute paths are re-anchored under it). When set, the output is written to disk and omitted from the… |
| scene | integer | – | Scene number to render, matching the editor player: scene 1 is the base chart and each `scene` block that follows is the next number. Omit for the base chart. |
| source | string | yes | The .bpc chart source to render. |
| width | integer | – | Output width in pixels (max 1600). PNGs are rasterized at 2x for retina sharpness. |
| Name | Type | Req | Description |
|---|---|---|---|
| frame | object | yes | Frame metadata extracted from the chart. |
| html | string | – | HTML markup, when format is "html" and `save` was not used. |
| mimeType | string | yes | MIME type of the rendered output. |
| savedTo | string | – | Absolute path the output was written to, when `save` was used. |
| svg | string | – | SVG markup, when format is "svg" and `save` was not used. |
| urls | object | – | Stateless hosted render URLs (only when MCP_PUBLIC_URL is set). |
| urlsOmitted | string | – | Set when URLs were omitted because the source exceeded the URL cap. |
No examples provided.
search_examples ~99
Find canonical .bpc examples by topic keywords and/or chart type. Returns ranked pointers { id, title, description, chartType } — call get_example with an id to fetch the full DSL.
| Name | Type | Req | Description |
|---|---|---|---|
| chartType | string | – | Restrict results to this chart type (or alias). |
| limit | integer | – | Maximum number of results to return (max 20). |
| query | string | – | Topic keywords to match against sample titles and descriptions. |
| Name | Type | Req | Description |
|---|---|---|---|
| results | array | yes | Ranked sample pointers, best first. |
No examples provided.
validate_dsl ~65
Parse and semantically validate a .bpc source. Returns { valid, errors[], warnings[] }. Errors include unknown chart types, unknown properties, and empty data blocks with nearest-neighbour suggestions.
| Name | Type | Req | Description |
|---|---|---|---|
| source | string | yes | The .bpc chart source to parse and validate. |
| Name | Type | Req | Description |
|---|---|---|---|
| errors | array | yes | Fatal structural and value-level errors. |
| valid | boolean | yes | True when the source parses and passes semantic validation. |
| warnings | array | yes | Non-fatal advisories. |
No examples provided.
What is the Blueprint Chart MCP server?
Blueprint Chart is an MCP server listed in the public MCP registry as io.github.blueprint-chart/mcp. The open chart format an LLM writes and the browser renders, to interactive, accessible SVG. This page covers its npm package (@blueprint-chart/mcp).
Is the Blueprint Chart MCP server safe to use?
Blueprint Chart scores 95 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 13 September 2026. It declares no install or post-install scripts. Its build provenance is signed and verified. 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 Blueprint Chart MCP server expose?
Blueprint Chart exposes 11 tools: validate_dsl, inspect_dsl, recommend_chart_type, render, list_chart_types, and 6 more. Their descriptions and schemas cost roughly 1,336 tokens of context every time the server is loaded.
Is the Blueprint Chart MCP server still maintained?
Blueprint Chart is still listed as active in the MCP registry. We last reached this channel on 13 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 Blueprint Chart MCP server under?
Blueprint Chart declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.