MCP.Market

Agentsim MCP server

online · 100% uptime
by agentsim.dev·dev.agentsim/mcp·v0.33.3·1 stars
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Control plane for agent auth walls. Connector 0 handles SMS OTP with US test numbers.

A87/100grade A
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Safety scan
A87/100

full report

Adoption
Growing

1 stars

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

Agentsim tools

Tool list not cached yet. `describe` through the gateway fetches it live.

Public scan report

scanner v0.1.10 · 2026-10-15 · same rubric, same numbers if you re-run it

no findings
  • –Code scanremote-only server, no package to scann/a
  • Live reliabilityremote reachable in 148ms (auth required)20/20
  • –Tool poisoningtools not inspected (endpoint requires auth); not countedn/a
  • Auth qualityauth enforced (unknown)9/15
  • Maintenancelast push 16 days ago15/15
  • Maintainer identityendpoint served from the registry-verified namespace domain8/10
Overall 87/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How Agentsim compares

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

Safety score
87/100
higher than 78% of 4,461 AI and agents servers
Uptime
100%
of our recent checks; the typical remote AI and agents server answers 100%
Response time
445 ms
faster than 33% of 2,334 AI and agents servers
GitHub stars
1
more than 50% of 2,713 AI and agents servers

Release history: 6 versions in the registry since 2026-09-08, latest 2026-09-29, typically one every 2 days.

Install Agentsim in Claude Code, Cursor or VS Code

claude mcp add --transport http mcp https://mcp.agentsim.dev/mcp
Add to Cursor

What the publisher says

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

agentsim-mcp

<!-- mcp-name: dev.agentsim/mcp -->

MCP server that exposes AgentSIM challenge tools to AI coding assistants: Claude Code, Cursor, Windsurf, and any other MCP-compatible host. Primary tools: openchallenge, waitforverdict. Aliases: provisionnumber, waitforotp.

Setup

Claude Code

claude mcp add agentsim -e AGENTSIM_API_KEY=asm_live_xxx -- uvx agentsim-mcp

Claude Desktop

Add to ~/Library/Application Support/Claude/claudedesktopconfig.json:

{
  "mcpServers": {
    "agentsim": {
      "command": "uvx",
      "args": ["agentsim-mcp"],
      "env": {
        "AGENTSIM_API_KEY": "asm_live_xxx"
      }
    }
  }
}

Cursor / Windsurf

Add agentsim-mcp as a stdio MCP server with AGENTSIMAPIKEY in the environment config.

Remote (no install)

Connect directly to the hosted MCP server without installing anything locally:

{
  "mcpServers": {
    "agentsim": {
      "type": "streamable-http",
      "url": "https://mcp.agentsim.dev/mcp",
      "headers": {
        "x-api-key": "asm_live_..."
      }
    }
  }
}

The hosted endpoint uses stateless HTTP and does not issue mcp-session-id headers. The session_id returned by AgentSIM tools identifies a challenge and remains valid across tool calls.

Tools

Control-Plane Nouns (Recommended)

Legacy Aliases (Backward Compatibility)

Auth

For stdio, set AGENTSIMAPIKEY in the process environment. For hosted HTTP, every request must send its own x-api-key; the server validates and forwards that caller-scoped key. Get a key at console.agentsim.dev.

Supported Countries

US (more coming soon)

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

Grade history

  • 2026-10-15restoreB → Ascore 87

Agentsim: common questions

Is Agentsim MCP server safe?
Yes, by our scan: it is graded A (87/100). Read the Agentsim safety report
How do I install Agentsim?
It runs remotely at mcp.agentsim.dev. 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 Agentsim need an API key?
Yes. The endpoint refuses requests without credentials; the publisher's docs say how to get them.
Is Agentsim maintained?
The last commit was 37 days ago (2026-09-29). The latest release is v0.33.3.
Is Agentsim up?
100% of our last 28 checks got an answer. We check remote servers about four times a day.
What can I use instead of Agentsim?
Servers from other publishers that do the same job: DCC-MCP Core MCP server, agent-device MCP server and agent-device MCP server.
How does Agentsim compare with other AI and agents MCP servers?
safety score 87/100 (higher than 78% of 4,461 AI and agents servers); uptime 100% (of our recent checks; the typical remote AI and agents server answers 100%); response time 445 ms (faster than 33% of 2,334 AI and agents servers). Full comparison.

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