MCP.Market

Velven MCP server

by velvenai·io.github.velvenai/velven·v1.0.1
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Publish browser games, worlds, tools and wonders built with AI to Velven's hosting, and manage them.

B80/100grade B
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Safety scan
B80/100

full report

Adoption
Growing

0 stars

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If you have run it, two minutes of your experience saves the next person an afternoon.

Velven tools (5, 1 write)

write = sends, deletes, buys or posts
  • my_spacesFree

    List the spaces of the signed-in Velven account: slug, title, status, whether Velven hosts it, and its page. Needs sign-in; called without it, the app asks the person to sign in to Velven.

  • publishwrite actionFree

    Publish a browser game, world, tool or wonder on Velven's hosting, from one HTML page or a small set of files (3 MB in all). Signed in: a private preview by default, or with prod: true the next live version after Velven's safety check. Not signed in: an unlisted page, live after the check, returned with a claim token that keeps it. A new space needs title, type and devices from the person. To update a space pass space (signed in) or claim (not signed in).

  • rollbackFree

    Make an earlier version of a hosted space live again. Only a version that was live before (rollback: true in versions) can be picked; it goes live at once without a new check. Needs sign-in.

  • search_docsFree

    Search Velven's documentation: publishing and hosting, velven.json, the CLI, the SDK (sign-in, leaderboards, saves, achievements, rooms), claiming a page, the agent API and limits. Returns the best matching sections with links.

  • versionsFree

    List a hosted space's versions, newest first: number, status (uploading, preview, checking, live, refused, unjudged, replaced), size, and whether rollback can pick it. Refused versions carry the reason. Needs sign-in.

Public scan report

scanner v0.1.10 · 2026-09-28 · same rubric, same numbers if you re-run it

1 high
  • –Code scanremote-only server, no package to scann/a
  • Live reliabilityremote reachable in 704ms20/20
  • Tool poisoning5 tool descriptions checked15/15
  • Auth qualityopen endpoint exposes 1 write-action tools with no auth3/15
  • Maintenancelast push 0 days ago15/15
  • Maintainer identityregistry namespace matches repository owner7/10

Findings (1)

  • highWrite-action tools reachable without authenticationauth.open-write
Overall 80/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How Velven compares

Against every graded Scraping and browsing MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
80/100
higher than 55% of 866 Scraping and browsing servers
Tools
5
the typical Scraping and browsing server has 6
Tools that change things
20%
typical: 0%. Fewer write tools means less an agent can break
Uptime
89%
of our recent checks; the typical remote Scraping and browsing server answers 100%
Response time
328 ms
faster than 37% of 384 Scraping and browsing servers

What its tools let an agent do: 4 read · 1 send or post

Install Velven in Claude Code, Cursor or VS Code

claude mcp add --transport http velven https://mcp.velven.ai/mcp
Add to Cursor

What the publisher says

From the Velven repository's README, as published. We do not edit it. Read it on GitHub

Velven skills

Agent Skills (skills.sh format), plugins and the MCP server for Velven, the community marketplace and host for spaces built with AI.

puts it live after Velven's safety check, and it works before the creator has an account (an unlisted page with a claim token to keep it). It fills velven.json from the project, links an already deployed site as the side path, claims a space that is already on Velven, and adds sign-in, leaderboards, saves, achievements and rooms through the Velven SDK.

  • onboard/ teaches a coding agent to publish a space on Velven: velven publish makes a private preview, --prod
  • plugins/velven/ is the same skill with Velven's MCP server, as a plugin for Claude Code and Codex.

Install

Skill only, for any agent that reads skills.sh skills:

npx skills add velvenai/skills

Claude Code, the plugin (the skill and the MCP server):

/plugin marketplace add velvenai/skills
/plugin install velven@velven

Codex: add this repository as a plugin marketplace (.agents/plugins/marketplace.json) and install velven.

Gemini CLI, the MCP server: gemini extensions install https://github.com/velvenai/skills.

The MCP server

https://mcp.velven.ai/mcp, Streamable HTTP. Tools: publish (one HTML page or a few files, 3 MB in all: a preview, or live with prod: true), myspaces, versions, rollback and searchdocs. Without signing in, publish makes an unlisted page and answers its claim token; the account tools ask you to sign in to Velven (OAuth). Any client that takes a remote MCP server adds it by that address, for example:

claude mcp add --transport http velven https://mcp.velven.ai/mcp

server.json is its entry in the MCP Registry (io.github.velvenai/velven).

Docs: https://velven.ai/docs

Nothing above is checked by us. What we check is on the safety report.

Velven: common questions

Is Velven MCP server safe?
Mostly: it is graded B (80/100). Read the Velven safety report
How do I install Velven?
It runs remotely at mcp.velven.ai. Add it to Claude Code, Cursor, VS Code or Claude Desktop with the snippets above, or call it through the mcp.market gateway without installing anything.
Does Velven need an API key?
Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is Velven maintained?
The last commit was 37 days ago (2026-09-28). The latest release is v1.0.1.
Is Velven up?
89% of our last 28 checks got an answer. We check remote servers about four times a day.
What can I use instead of Velven?
Servers from other publishers that do the same job: GrowBlocks Dev Kit MCP server, gamedev.pl MCP server and SeleniumBase MCP server.
How does Velven compare with other Scraping and browsing MCP servers?
safety score 80/100 (higher than 55% of 866 Scraping and browsing servers); tools 5 (the typical Scraping and browsing server has 6); tools that change things 20% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.

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