Skip to content
Sumibako logo

Sumibako

Saves pages that coding agents and chatbots write into a personal vault, returning a public read link for each.

Developer toolsAgentsCLIFree tier
sumibako.com ↗
At a glanceswept 2026-10-13

1.1k installs/mo

Established

For
people using coding agents like Claude Code, Codex, or Cursor who want to share their plans and notes as links
Price
Free plan · From $3.25/mopricing page, read 2026-10-14 ↗
Trial & discounts
save 18% yearlypricing page ↗
Activity
Actively maintainedrelease 2 days ago · site updated yesterday
Company
founding year not on record
Runs as
CLI
AlternativesSet it up for my teamIs Sumibako yours? Claim the card →
What people do with itread off sumibako.com on 2026-10-14
  • file a coding agent's plan as a shareable page
  • send a teammate a public link to a note
  • capture thoughts offline with a keyboard shortcut
Your datawhat they publish, each line with its page · read 2026-10-14

“We do not sell your information, we do not show you ads, and we do not use your notes to train AI models.”

privacy policy ↗

These are Sumibako's own statements, read from its pages. We did not audit them. A line that is missing was not found on the pages we read; it does not mean the practice is absent.

How a program reaches itfound, not claimed · read 2026-10-14
  • MCP servercom.sumibako/sumibakoverified in the MCP registry
  • Stateanswers, requires sign-inchecked 2026-10-14
  • Address to connectsumibako.com/api/mcp

MCP server details →

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.

Alternatives in Developer toolsby use, among tools still maintained

Figure and bar: visits/mo, estimate · year: online since

All Developer tools tools →

Questions this page answers
  • What is Sumibako?

    Saves pages that coding agents and chatbots write into a personal vault, returning a public read link for each. It is listed in the Atlas under Developer tools.

  • Who is Sumibako for?

    people using coding agents like Claude Code, Codex, or Cursor who want to share their plans and notes as links

  • How much does Sumibako cost?

    Sumibako has a free plan; paid plans start at $3.25/mo, per its pricing page on 2026-10-14.

  • Is Sumibako free?

    Yes, Sumibako has a free plan, per its pricing page on 2026-10-14.

  • Do people use Sumibako?

    Established: 1.1k installs/mo (npm).

  • Is Sumibako still maintained?

    Actively maintained: release 2 days ago · site updated yesterday.

  • Does Sumibako train AI on your data?

    No, per its privacy policy (2026-10-14): “We do not sell your information, we do not show you ads, and we do not use your notes to train AI models.”

  • Is Sumibako safe?

    We do not audit vendors. What Sumibako publishes, read 2026-10-14: on training with your data, “We do not sell your information, we do not show you ads, and we do not use your notes to train AI models.”.

  • How do I cancel Sumibako?

    In its own words (terms of service, 2026-10-14): “You may cancel your subscription at any time from your account settings.”

  • What are alternatives to Sumibako?

    In Developer tools, by use: CapitaWork, Vibe Coders' Kit, Doodler.co, Auralogs, agentleFS, NapCat.

Not quite it? Describe the job

beta

Five tools from the Atlas that fit it, each judged against what you wrote.

How we read a tool

No votes, no reviews, no vendor claims. Every week a crawler reads each tool's own site and a few public registries, and the words on the card are bands over what it read.

  • Use: visits to the site (estimated), installs from npm and PyPI, presence in Chrome's usage report.
  • Activity: the newest release on GitHub, npm or PyPI; the newest dated page on the site; open roles on a public jobs board.
  • Price: the vendor's own pricing page, read with the date. A figure is printed only when it is on that page.
  • The line and the use cases are written by us from the homepage, one tool at a time, and refused when they repeat the vendor's marketing.

How AI assistants read each site — the reading vendors ask us about — is on each tool's own visibility page.