Shardflux

dev.shardflux/mcpv0.12.2Browser Automation

Persistent cloud workspaces for AI agents: run commands, edit files, use git and a browser.

The current version, v0.12.2, was published to the official MCP registry on 2026-10-08. It is distributed as @shardflux/mcp on npm and as a hosted remote over streamable-http, filed under Browser Automation by this index, and declares 11 environment variables. Removals and unreachable sources are measured across every server this index tracks, contract drift across the servers that answer in consecutive snapshots; the index's current counts put this record in context.

In-path gate · all MCP tools

Using Shardflux in Claude, Cursor, Gemini CLI, Cline, or Zed?

MCP tool contracts can change remotely with no version bump. The mcpindex gate pins each contract and HOLDs the call when it drifts-before your agent acts. Zero credentials. This is not the package install for this server itself (use Install this server for that).

Install the mcpindex gate (one command)

Rewrites your MCP host config so each server launches behind the gate. Inspect first: curl -fsSL https://mcpindex.ai/install.sh | less

uv tool install mcpindex-gate && mcpindex-config-wire

Auditable install path →Watch it hold a drift →

Trust verdict · v1 advisory · method

REVIEWstatus: PARTIALfresh until 2026-11-03 08:08 UTC

screened 2026-10-04tier: scannedgranularity: description-levelsource: registry

Semantic screen found no manipulation pattern in the description. Conformance probe not yet run.

mcpindex.integrity.descriptionpassINFO

evidence“Normal capability description”via static_description

Limits of this verdict

- Semantic screen only - the deterministic conformance probe has not run on this server
- Confidence is reported but not yet calibrated (v1)
- Screen reads the tool description, not the live behavior
- advisory
- registry description only no input schema
- screen model 8b
- The registry listing (version, packages, links) changed after this screen ran - the description we assessed did not

Semantic screen: an LLM judge reads the tool description for hidden instructions (status PARTIAL). A pass means the description is not lying, not that the tool is safe: a high-capability tool with an honest description still warrants caution. The deterministic conformance probe has not been run on this server yet, so the screen here is semantic-only. Posture: advisory. Confidences are reported but not yet calibrated (calibrated=false at v1). Full verdict history is not shown on this page.

Own this server? Test a description on the public screen → It is a separate check from the verdict above, so the two can differ.

That verdict was true at screening time (snapshot 2026-10-19).

Contracts can change after screening, with no version bump. The gate pins Shardflux’s tool contracts on first sight and holds any silent change before your agent acts - the check that keeps being true on Tuesday.

See your first HOLD in 2 minutes →

Cite this record

People vet a server before wiring it in. One line on your project site or docs answers that with an independent record: screening verdict, registry provenance, contract drift history. It stays current as new screens and drift events land.

Markdown

[Independent trust record for Shardflux](https://mcpindex.ai/server/dev-shardflux-mcp) - screening verdict, registry provenance, and contract drift monitoring.

HTML

<a href="https://mcpindex.ai/server/dev-shardflux-mcp">Independent trust record for Shardflux</a> - screening verdict, registry provenance, and contract drift monitoring.

Embed this badge

A live verdict badge for your README or listing. It reflects the current screen, links back here, and updates when the verdict does.

Markdown

[![mcpindex](https://mcpindex.ai/api/v1/badge/dev-shardflux-mcp)](https://mcpindex.ai/server/dev-shardflux-mcp)

HTML

<a href="https://mcpindex.ai/server/dev-shardflux-mcp"><img src="https://mcpindex.ai/api/v1/badge/dev-shardflux-mcp" alt="mcpindex verdict" height="20" /></a>

Environment variables

SHARDFLUX_API_KEY

requiredsecret

Scoped Shardflux project API key (sfk_<key id>_<secret>). Its tool permissions decide which workspace tools are listed.

SHARDFLUX_API_URL

API base URL. Plain http:// is allowed only for loopback hosts.

SHARDFLUX_WORKSPACE_KEY

Pin one workspace: workspace_key becomes optional on every tool and any other key is refused (workspace_pinned).

SHARDFLUX_TEMPLATE

Default template slug for workspace_open.

SHARDFLUX_MCP_TOOL_TIMEOUT_MS

Default and maximum deadline per tool call in milliseconds (1000-3600000). A call's timeout_ms can only shorten it.

SHARDFLUX_WAKE

on: workspace tools resume a suspended workspace and then run. off: they return the workspace_not_running refusal.

SHARDFLUX_WAKE_TIMEOUT_MS

Longest wait per tool call for a workspace to wake or finish a transition, in milliseconds (1000-3600000; clamped to SHARDFLUX_MCP_TOOL_TIMEOUT_MS).

SHARDFLUX_AGENT_LABEL

Attribution label of every tool token this server obtains (shown as an agent session).

SHARDFLUX_MCP_LOG_LEVEL

Log level of the JSON log lines on stderr (stdout carries the protocol).

SHARDFLUX_HTTP_KEEPALIVE

Unset: private HTTP/1.1 pooling on Node 26, native fetch elsewhere. 0: force connection closure for diagnosis. 1: select native pooling.

SHARDFLUX_PREWAKE

Offer explicit workspace_hint for tool input streaming (on or off).

MCP quality score · maturity, not trust · methodology

freshness

completeness

installability

documentation

stability

Alternatives in Browser Automation

PlayDrop

ai.playdrop/mcp

Publish, test and share browser games on PlayDrop from your AI agent.

FindMeTool

com.findmetool/lookup

Look up a FindMeTool page URL. Tool input stays in the browser.

SnapSweep

dev.snapsweep/snapsweep

Read-only web QA agent: scans a site in a real browser and returns evidence-backed findings

Install this server

Remote endpoint

Streamable HTTP / SSE endpoint. Add to any MCP client that supports remote servers.

https://mcp.shardflux.dev/mcp

Claude Desktop (claude_desktop_config.json)

{
  "mcpServers": {
    "mcp": {
      "command": "npx",
      "args": [
        "-y",
        "--",
        "@shardflux/mcp"
      ],
      "env": {
        "SHARDFLUX_API_KEY": "<your-shardflux_api_key>",
        "SHARDFLUX_API_URL": "https://api.shardflux.dev",
        "SHARDFLUX_WORKSPACE_KEY": "<shardflux_workspace_key>",
        "SHARDFLUX_TEMPLATE": "<shardflux_template>",
        "SHARDFLUX_MCP_TOOL_TIMEOUT_MS": "120000",
        "SHARDFLUX_WAKE": "on",
        "SHARDFLUX_WAKE_TIMEOUT_MS": "120000",
        "SHARDFLUX_AGENT_LABEL": "mcp",
        "SHARDFLUX_MCP_LOG_LEVEL": "info",
        "SHARDFLUX_HTTP_KEEPALIVE": "<shardflux_http_keepalive>",
        "SHARDFLUX_PREWAKE": "off"
      }
    }
  }
}

Cursor (.cursor/mcp.json)

{
  "mcpServers": {
    "mcp": {
      "command": "npx",
      "args": [
        "-y",
        "--",
        "@shardflux/mcp"
      ],
      "env": {
        "SHARDFLUX_API_KEY": "<your-shardflux_api_key>",
        "SHARDFLUX_API_URL": "https://api.shardflux.dev",
        "SHARDFLUX_WORKSPACE_KEY": "<shardflux_workspace_key>",
        "SHARDFLUX_TEMPLATE": "<shardflux_template>",
        "SHARDFLUX_MCP_TOOL_TIMEOUT_MS": "120000",
        "SHARDFLUX_WAKE": "on",
        "SHARDFLUX_WAKE_TIMEOUT_MS": "120000",
        "SHARDFLUX_AGENT_LABEL": "mcp",
        "SHARDFLUX_MCP_LOG_LEVEL": "info",
        "SHARDFLUX_HTTP_KEEPALIVE": "<shardflux_http_keepalive>",
        "SHARDFLUX_PREWAKE": "off"
      }
    }
  }
}

Cline (cline_mcp_settings.json)

npx -y -- @shardflux/mcp

Claude Code (claude mcp add)

claude mcp add --scope user mcp -- npx -y -- @shardflux/mcp

Gemini CLI (gemini mcp add)

gemini mcp add -s user mcp npx -y -- @shardflux/mcp

Verdict API

curl -s mcpindex.ai/api/v1/trust/server/dev-shardflux-mcp

Free-tier verdict as JSON: decision + dimensions + severity. Call it from your agent before it invokes a tool it just discovered.

Details

version: v0.12.2
category: Browser Automation
verdict expires: 2026-11-03
quality: 80 / 100
operator: dev.shardflux

Listing

Listed from the official MCP registry. Unclaimed by its maintainer. Maintainer? Verify it → · or email us →

Provenance

Each verdict is bound to a hash of the exact description it judged, so a re-crawl that changes the text produces a new record rather than silently inheriting this one. Verdict history is hash-chained and anchored to Bitcoin via OpenTimestamps (latest confirmed at block 972,115). Verify it yourself.

Remote endpoint

https://mcp.shardflux.dev/mcp