Agent Output Guard MCP Server

by agenson-horrowitz Your server? Claim it

local only

Agent Output Guard runs on your own machine — the client starts it, so there is no endpoint to ping. 55 installs a week from npm. Last commit 5 Apr 2026.

Validate and verify data from other agents before acting on it. Zero LLM costs.

Installs per day peak 17 · avg 6 · +49% w/w

a month agotoday

Installs / week

npm · @agenson-horrowitz/agent-output-guard-mcp

Stars

0 open issues

5 Apr 2026

Last commit

no releases in 90 days

MIT

License

JavaScript

Nothing serious here today

Today is the operative word: we check Agent Output Guard every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add agent-output-guard -- npx -y @agenson-horrowitz/agent-output-guard-mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "agent-output-guard": {
      "command": "npx",
      "args": [
        "-y",
        "@agenson-horrowitz/agent-output-guard-mcp"
      ]
    }
  }
}

~/.codex/config.toml

[mcp_servers.agent-output-guard]
command = "npx"
args = ["-y", "@agenson-horrowitz/agent-output-guard-mcp"]

.cursor/mcp.json

{
  "mcpServers": {
    "agent-output-guard": {
      "command": "npx",
      "args": [
        "-y",
        "@agenson-horrowitz/agent-output-guard-mcp"
      ]
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "agent-output-guard": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@agenson-horrowitz/agent-output-guard-mcp"
      ]
    }
  }
}

Alternatives to Agent Output Guard

same job, measured the same way

Aidress

by aidress-ai

Verify, discover, and rate AI agents before transacting.

367 installs/wk local only

scamgate

by odaiameera

Offline scam check for agents: verify links and payments before acting (allow, ask or deny).

475 installs/wk local only

Datris

by datris

The data control plane for AI agents — acquire, validate, land, and query data over MCP.

3 227 installs/wk local only

Kaval

by usekaval

Verify the facts an agent's action depends on before it acts — ALLOW, REVIEW, or BLOCK.

142 installs/wk local only

Kaval

by lufemc

Verify the facts an agent's action depends on before it acts — ALLOW, REVIEW, or BLOCK.

local only

Scrapecheck

by fieldmodellc

Verify before your agent acts on data it paid for. Signed verdicts, checkable offline, via x402.

3 tools answering

Veritap

by veritap

Check whether a real-world fact can be verified before an agent acts on it. Free, no auth.

69 installs/wk 6 tools answering

Leakferret

by leakferrethq

Context-aware secret scanner: lets an AI agent scan, verify, and rewrite secrets before committing.

79 installs/wk local only

Agent Output Guard — questions

Answers built from our own checks of this server.

Why is there no uptime for Agent Output Guard?

Agent Output Guard runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the npm package @agenson-horrowitz/agent-output-guard-mcp was installed 55 times last week.

How do I connect Agent Output Guard?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It runs locally, so the command pulls @agenson-horrowitz/agent-output-guard-mcp straight from npm; nothing to host, nothing to sign up for.

How many people use Agent Output Guard?

The npm package @agenson-horrowitz/agent-output-guard-mcp was installed 55 times in the last week. Week over week that is +49%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.

Is Agent Output Guard open source?

Yes — it is published under the MIT licence, written in JavaScript and 0 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.