Velven

io.github.velvenaiPublished by GitHub account velvenaiv1.0.1Updated Nov 2, 2026

Publish browser games, worlds, tools and wonders built with AI to Velven's hosting, and manage them.

VerifiedStreamable HTTPWeb executableCloud & InfrastructureDeveloper Tools

Overview

AI-generated overview

Velven's remote MCP server lets an assistant publish browser games and small HTML pages to Velven hosting, then list spaces, inspect versions, roll back and…

What you can do
  • Publish a browser game or small HTML page or file set to Velven hosting, as a private preview, a live version, or an unlisted page with a claim token
  • List the signed-in account's spaces with slug, title, status and page
  • List a hosted space's versions with status, size and rollback eligibility, including refusal reasons
  • Roll a hosted space back to an earlier version that was live before
  • Search Velven documentation on publishing, hosting, velven.json, the CLI, the SDK, claiming pages, the agent API and limits
When to use it
Useful when you build a browser game, interactive page or small web tool with an assistant and want it hosted and shareable without setting up your own deployment, or when you need to manage existing Velven spaces and versions from the chat.
Requirements
A remote Streamable HTTP endpoint at mcp.velven.ai/mcp; no local package or runtime. Signing in to Velven via OAuth is needed for the account tools (my_spaces, versions, rollback); publishing works without an account but yields an unlisted page with a claim token. Uploads are limited to 3 MB in total.
Before you install
Publishing puts content on a public third-party host: with prod: true it goes live on the Velven page within seconds, and without sign-in it becomes an unlisted page reachable by anyone with the link. Rollback changes what is live immediately. Sign-in uses OAuth to a Velven account, so review what the account grants before connecting.

Installation

In SourceWeft

  1. Open Velven in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/io.github.velvenai%2Fvelven/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "velven": {
      "type": "http",
      "url": "https://mcp.velven.ai/mcp"
    }
  }
}

README

Velven skills

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

  • onboard/ teaches a coding agent to publish a space on Velven: velven publish makes a private preview, --prod puts it live in seconds, 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.
  • 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, with an optional thumbnail and clip among them: a preview, or live in seconds with prod: true), my_spaces, versions, rollback and search_docs. 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

Source: README.md at commit c0cefd1

Tools

5

publish

Publish a space

Publish a browser game or any other page made to play or use 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, live on its Velven page within seconds. Not signed in: an unlisted page, live the same way, returned with a claim token that keeps it. A new space needs title and devices from the person. To update a space pass space (signed in) or claim (not signed in).

Parameterssdkspacliphtmlprodclaimentryfilesspacetitleenginedevices+2 more

my_spaces

Your spaces

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.

Takes no parameters.

versions

Versions of a space

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

Parametersspacerequired

rollback

Roll back a space

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. Needs sign-in.

Parametersspacerequiredversionrequired

search_docs

Search Velven's docs

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.

Parameterslimitqueryrequired

Version history

1
  1. v1.0.1LatestSep 28, 2026

Score

90% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts

    Declare a license in the repository or the registry entry.