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Nowline

NPM · @NOWLINE/MCP · SCANNED SEP 30

Create and edit your roadmaps in a plain-text format.

Available components

npm · @nowline/mcp 83
0 this week 83 Trust /100
Trust breakdown (7 categories)

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 Security89
  • No malware found by supply-chain analysis.Pass
  • CVE check failed: a known high-severity CVE affects uuid 8.3.2, reached via @nowline/export > @nowline/export-xlsx > exceljs > uuid. A fixed version is available. View diagnostics → Fail
  • No install/post-install scripts declared.Pass
  • 117 of 247 dependencies flagged as unhealthy (6 deprecated). 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 (Apache-2.0).Pass
  • Actively maintained (last published 101 days ago).Pass
  • Publishes a security disclosure policy (SECURITY.md).Pass
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
  • Context-footprint check failed: tool/resource definitions use about 2525 tokens (~109/item across 23 items; 19 tools + 4 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 Management90
  • Stability observed for 27 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage99
  • 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
  • 97% of tool parameters carry a description.Partial
  • 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
  • All 1 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation.Pass
  • An AI judge read all 21 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
  • Supports UI / widget rendering.Pass
Install

How do I install the Nowline MCP server?

Nowline runs locally as an npm package, launched with npx -y @nowline/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 · @nowline/mcp

# add to Claude Code
claude mcp add io-nowline-nowline -- npx -y @nowline/mcp
// .cursor/mcp.json
{
  "mcpServers": {
    "io-nowline-nowline": {
      "command": "npx",
      "args": [
        "-y",
        "@nowline/mcp"
      ]
    }
  }
}
// .vscode/mcp.json
{
  "servers": {
    "io-nowline-nowline": {
      "command": "npx",
      "args": [
        "-y",
        "@nowline/mcp"
      ]
    }
  }
}
# add to Codex CLI
codex mcp add io-nowline-nowline -- npx -y @nowline/mcp
// opencode.json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "io-nowline-nowline": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "@nowline/mcp"
      ],
      "enabled": true
    }
  }
}
# add to OpenClaw
openclaw mcp add io-nowline-nowline --command npx --arg -y --arg @nowline/mcp
# ~/.hermes/config.yaml
mcp_servers:
  io-nowline-nowline:
    command: "npx"
    args: ["-y", "@nowline/mcp"]
// ~/.netclaw/config/netclaw.json
{
  "McpServers": {
    "io-nowline-nowline": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "@nowline/mcp"
      ]
    }
  }
}
# add to Vellum
assistant mcp add io-nowline-nowline -t stdio -c npx -a -y @nowline/mcp
// mcp.json
{
  "mcpServers": {
    "io-nowline-nowline": {
      "command": "npx",
      "args": [
        "-y",
        "@nowline/mcp"
      ]
    }
  }
}
Changelog

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.

  • 30 Sept 26 +1

    No change was recorded against any check on this day. Stability & Change Management went from 87 to 90. That category is still filling its 30-day observation window: 26 days of observed history at the previous scan, 27 at this one. The score rises as the window fills, whether or not the server changes.

  • 28 Sept 26 +1
    • We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
  • 27 Sept 26 −3
    • Stability: pass → 0.80 functional
  • 26 Sept 26 0
    • Stability: 0.97 → pass security
  • 25 Sept 26 +1
    • We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
  • 23 Sept 26 +1

    No change was recorded against any check on this day. Stability & Change Management went from 87 to 90. That category is still filling its 30-day observation window: 26 days of observed history at the previous scan, 27 at this one. The score rises as the window fills, whether or not the server changes.

  • 21 Sept 26 +1

    No change was recorded against any check on this day. Stability & Change Management went from 80 to 83. That category is still filling its 30-day observation window: 24 days of observed history at the previous scan, 25 at this one. The score rises as the window fills, whether or not the server changes.

  • 20 Sept 26 −3
    • Stability: pass → 0.80 functional
Diagnostics

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 30 Sept 2026 · Analysed npm/@nowline/mcp@0.8.5

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 →

Vulnerabilities 1 finding
ID CVE Severity Vector Fix available
GHSA-w5hq-g745-h8pq CVE-2026-41907 high CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N yes

Background: What a vulnerability scan can and cannot prove →

Dependencies 247 packages
Packages resolved 247
Deprecated 6
Stale 102
No linked repository 12
Tree resolution Complete

Background: SBOMs and build attestations, explained →

MCP tools · 19 exposed · ~2,081 tokens

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 →

Tool Tokens
capabilities ~27

Return all supported themes, icons, locales, export formats, and template names in a single response.

Input schema present but exposes no named parameters.

NameTypeReqDescription
formatsarrayyes–
iconsarrayyes–
localesarrayyes–
templatesarrayyes–
themesarrayyes–

No examples provided.

convert ~142

Convert between .nowline source text and its JSON AST representation. `to:json` serializes a .nowline file to the JSON AST; `to:nowline` pretty-prints a JSON AST back to canonical .nowline source.

NameTypeReqDescription
pathstring–Real local filesystem path to the source file. Never pass a virtual or sandbox path such as /mnt/user-data/… — pass `source` instead.
sourcestring–Inline source text to convert.
tostringyes"json" — serialize .nowline text to JSON AST. "nowline" — pretty-print a JSON AST back to .nowline source.
NameTypeReqDescription
resultstringyes–
tostringyes–

No examples provided.

create ~129

Write a new .nowline file after validation. Overwrites if the path already exists. Example: nowline v1 roadmap r "Title" start:2026-01-05 scale:2w swimlane eng "Engineering" item build "Build" duration:3w Source is `.nowline` DSL (not JSON/YAML); call the `reference`/`examples` tools for full syntax.

NameTypeReqDescription
pathstringyesAbsolute or relative path to write the .nowline file.
sourcestringyesThe .nowline source text to write.
NameTypeReqDescription
diagnosticsarray––
okbooleanyes–
pathstringyes–

No examples provided.

delete ~34

Delete a local .nowline file.

NameTypeReqDescription
pathstringyesAbsolute or relative path of the .nowline file to delete.
NameTypeReqDescription
pathstringyes–

No examples provided.

examples ~43

Return canonical .nowline example sources. Callable alternative to the nowline://examples resource.

NameTypeReqDescription
namestring–Example name. Omit for the catalog plus minimal inline.
NameTypeReqDescription
namestring––
namesarray––
sourcestring––

No examples provided.

export ~563

Export a .nowline roadmap to any of the eight canonical formats. Byte-identical to `nowline -f <format>` for the same source and inputs. For pdf/xlsx/png: omit `delivery` and omit `output` — the server auto-saves to the configured folder and returns the path. Never use `delivery:"inline"` for binary formats on Claude Desktop (inline binary cannot be displayed). For svg/html/mermaid: the text is returned inline — present it to the user as a downloadable artifact of the matching type.

NameTypeReqDescription
deliverystring–"file" — write to disk and return the path (no inline bytes). "inline" — return bytes in the response (embedded resource for pdf/xlsx, image for png, text for other formats). "both" — write to disk a…
formatstringyesExport format: svg, pdf, html, mermaid, xlsx, msproj, or png.
marginPtnumber–PDF margin in points.
msprojStartstring–MS Project start date override (YYYY-MM-DD).
nowstring–Now-line date as YYYY-MM-DD (UTC).
orientationstring–PDF orientation.
outputstring–Optional path to write the output file. Omit for binary formats (pdf, xlsx, png) — the server auto-saves to the configured folder as <roadmap-id>.<ext>. To choose a filename, pass a bare filename (e.…
pageSizestring–PDF page size.
pathstring–Real local filesystem path to the .nowline file (e.g. /Users/name/Desktop/foo.nowline). Never pass a virtual or sandbox path such as /mnt/user-data/… — those do not exist on the host filesystem. Pass…
scalenumber–PNG scale factor.
sourcestring–Inline .nowline source text.
themestring––
NameTypeReqDescription
bytesnumber––
formatstringyes–
pathstring––

No examples provided.

list ~57

List .nowline files under a directory.

NameTypeReqDescription
directorystring–Directory to scan. Defaults to the allowed root (cwd or --root). Absolute or relative.
recursiveboolean–Whether to scan subdirectories. Defaults to false.
NameTypeReqDescription
pathsarrayyes–

No examples provided.

list-formats ~34

List all supported export formats (svg, png, pdf, html, mermaid, xlsx, msproj, json).

Input schema present but exposes no named parameters.

NameTypeReqDescription
itemsarrayyes–

No examples provided.

list-icons ~24

List built-in capacity-icon names usable in the `capacity-icon:` style property.

Input schema present but exposes no named parameters.

NameTypeReqDescription
itemsarrayyes–

No examples provided.

list-locales ~18

List supported BCP-47 locale tags.

Input schema present but exposes no named parameters.

NameTypeReqDescription
itemsarrayyes–

No examples provided.

list-templates ~24

List built-in template names usable with `nowline --init --template`.

Input schema present but exposes no named parameters.

NameTypeReqDescription
itemsarrayyes–

No examples provided.

list-themes ~20

List supported color themes: light, dark, grayscale.

Input schema present but exposes no named parameters.

NameTypeReqDescription
itemsarrayyes–

No examples provided.

read ~34

Read a local .nowline file.

NameTypeReqDescription
pathstringyesAbsolute or relative path to the .nowline file to read.
NameTypeReqDescription
pathstringyes–
sourcestringyes–

No examples provided.

reference ~46

Return the Nowline DSL reference (condensed cheatsheet or full man page). Callable alternative to the nowline://reference resource.

NameTypeReqDescription
formatstring–Reference format. Defaults to condensed.
NameTypeReqDescription
formatstringyes–
textstringyes–

No examples provided.

render ~420

Validate then render a .nowline roadmap to SVG or PNG (combined validate+render). Returns structured diagnostics on error-severity input instead of a raw kernel error. On MCP Apps hosts the in-chat preview is view-only (no download/export button); use `export` for files and the `share` tool for an openable link. Example: nowline v1 roadmap r "Title" start:2026-01-05 scale:2w swimlane eng "Engineering" item build "Build" duration:3w Source is `.nowline` DSL (not JSON/YAML); call the `reference`/`examples` tools for full syntax.

NameTypeReqDescription
formatstring–Output format. Defaults to svg.
nowstring–Now-line date as YYYY-MM-DD (UTC). Omit to suppress.
outputstring–Real local filesystem path to write the output file (e.g. /Users/name/Desktop/roadmap.svg). Never pass a virtual or sandbox path such as /mnt/user-data/… — omit this parameter to receive output inlin…
pathstring–Real local filesystem path to the .nowline file (e.g. /Users/name/Desktop/foo.nowline). Never pass a virtual or sandbox path such as /mnt/user-data/… — those do not exist on the host filesystem. Pass…
previewboolean–When true, force the in-chat MCP Apps preview. On MCP Apps hosts the preview auto-renders via _meta.ui without this flag.
reviewboolean–When true, also attach a downscaled PNG so a multimodal model can visually check layout (label overflow, lane crowding, off-range now-line). Off by default.
scalenumber–PNG pixel-density multiplier. Defaults to 2.
sourcestring–Inline .nowline source text.
themestring–Color theme. Defaults to light.
widthnumber–Canvas width in px.
NameTypeReqDescription
bytesnumber––
formatstringyes–
insightsarray––
pathstring––

No examples provided.

schema ~25

Return the structured Nowline DSL key vocabulary (directive keys, entity types, item properties).

Input schema present but exposes no named parameters.

NameTypeReqDescription
directiveKeysarrayyes–
entityTypesarrayyes–
itemPropertyKeysarrayyes–

No examples provided.

share ~182

Generate a shareable link for a roadmap. The roadmap source is encoded into the URL fragment (client-side; no upload, no account, no network call) and opens in the free Nowline web app (free.nowline.io/open), where anyone with the link can view it and export to PDF/PNG/SVG. Prefer `render` to show a roadmap in chat — that is the default. Use `share` only when the user explicitly asks for a link to open, send, or export elsewhere.

NameTypeReqDescription
pathstring–Real local filesystem path to the .nowline file (e.g. /Users/name/Desktop/foo.nowline). Never pass a virtual or sandbox path such as /mnt/user-data/… — those do not exist on the host filesystem. Pass…
sourcestring–Inline .nowline source text.
NameTypeReqDescription
shareUrlstringyes–

No examples provided.

update ~121

Replace an existing .nowline file after validation. Example: nowline v1 roadmap r "Title" start:2026-01-05 scale:2w swimlane eng "Engineering" item build "Build" duration:3w Source is `.nowline` DSL (not JSON/YAML); call the `reference`/`examples` tools for full syntax.

NameTypeReqDescription
pathstringyesAbsolute or relative path of the .nowline file to update.
sourcestringyesThe new .nowline source text.
NameTypeReqDescription
diagnosticsarray––
okbooleanyes–
pathstringyes–

No examples provided.

validate ~138

Parse and validate a .nowline roadmap. Returns ok=true with optional layout insights when valid, or ok=false with structured diagnostics. Example: nowline v1 roadmap r "Title" start:2026-01-05 scale:2w swimlane eng "Engineering" item build "Build" duration:3w Source is `.nowline` DSL (not JSON/YAML); call the `reference`/`examples` tools for full syntax.

NameTypeReqDescription
pathstring–Absolute or relative path to a .nowline file to validate.
sourcestring–Inline .nowline source text to validate.
NameTypeReqDescription
diagnosticsarrayyes–
insightsarray––
okbooleanyes–

No examples provided.

Common questions

What is the Nowline MCP server?

Nowline is an MCP server listed in the public MCP registry as io.nowline/nowline. Create and edit your roadmaps in a plain-text format. This page covers its npm package (@nowline/mcp).

Is the Nowline MCP server safe to use?

Nowline scores 83 out of 100 on VerifyMCP. We recorded 1 known advisory against it as of 30 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 Nowline MCP server expose?

Nowline exposes 19 tools: validate, read, create, update, delete, and 14 more. Their descriptions and schemas cost roughly 2,081 tokens of context every time the server is loaded.

Is the Nowline MCP server still maintained?

Nowline is still listed as active in the MCP registry. We last reached this channel on 30 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 Nowline MCP server under?

Nowline declares the Apache-2.0 licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.