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io.github.afferens/mcp-server

Official registry AI and agents

Real-time physical perception for AI agents — vision, spatial, acoustic, environmental

Source code Documentation

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

NPM package @afferens/mcp-server
Claude Code 
claude mcp add io-github-afferens-mcp-server -- npx -y @afferens/mcp-server@0.2.1
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "io-github-afferens-mcp-server": {
            "command": "npx",
            "args": [
                "-y",
                "@afferens/mcp-server@0.2.1"
            ]
        }
    }
}

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. @afferens/mcp-server
  2. Tools
  3. Quick Start
  4. Usage
  5. Links
  6. License

@afferens/mcp-server

MCP server for Afferens - real-time physical perception for AI agents.

Use it from local MCP clients over stdio or remote/hosted clients over streamable HTTP. It gives any MCP-compatible AI assistant live sensor data: object detections, positions, sounds, environmental readings, chemical traces, and node health.

Tools

ToolAuthDescription
afferens_demoNoneLive perception data across all 6 modalities. Free, no key needed.
afferens_perceiveAPI keyQuery live events by modality with filtering and limits.
afferens_verifyAPI keyFetch the feed twice and return a proof bundle with headers, age, and a freshness verdict.

Modalities: VISION / SPATIAL / ACOUSTIC / ENVIRONMENTAL / MOLECULAR / INTEROCEPTION

Quick Start

Free tier: 10,000 tokens, no card required. Get your key at afferens.com.

Local MCP Clients
claude mcp add afferens -- npx -y @afferens/mcp-server

Then set your key:

claude mcp add afferens -e AFFERENS_API_KEY=YOUR_KEY -- npx -y @afferens/mcp-server

This stdio setup works for Claude Code, Claude Desktop, Cursor, and Windsurf.

Remote MCP Clients

For hosted or browser-based clients, run Afferens in HTTP mode and point the client at the /mcp endpoint:

AFFERENS_TRANSPORT=http AFFERENS_PORT=8790 AFFERENS_API_KEY=YOUR_KEY node dist/index.js

Then register the endpoint:

{
  "afferens": {
    "url": "http://127.0.0.1:8790/mcp",
    "bearer_token_env_var": "AFFERENS_API_KEY"
  }
}
Claude Desktop / Cursor / Windsurf

Add to your MCP config file:

{
  "mcpServers": {
    "afferens": {
      "command": "npx",
      "args": ["-y", "@afferens/mcp-server"],
      "env": {
        "AFFERENS_API_KEY": "YOUR_KEY"
      }
    }
  }
}

Config file locations:

  • Claude Desktop (Mac): ~/Library/Application Support/Claude/claude_desktop_config.json
  • Claude Desktop (Windows): %APPDATA%\Claude\claude_desktop_config.json
  • Cursor: .cursor/mcp.json in your project root
  • Windsurf: ~/.codeium/windsurf/mcp_config.json
Try it without a key
{
  "mcpServers": {
    "afferens": {
      "command": "npx",
      "args": ["-y", "@afferens/mcp-server"]
    }
  }
}

Call afferens_demo - no API key needed.

Usage

Once connected, your AI agent can call:

afferens_perceive({ modality: "VISION", limit: 5 })

Returns structured perception events your agent can reason over and act on.

For demo verification:

afferens_verify({ modality: "VISION", limit: 3, wait_ms: 2000 })

Returns two raw snapshots plus headers, age, and a hash check so you can show whether the feed is live, stale, or unchanged.

License

MIT

Frequently asked questions

What is io.github.afferens/mcp-server?

Real-time physical perception for AI agents — vision, spatial, acoustic, environmental

How do I install io.github.afferens/mcp-server?

It runs on your machine. In Claude Code: claude mcp add io-github-afferens-mcp-server -- npx -y @afferens/mcp-server@0.2.1. For other clients, paste the JSON configuration from this page into their MCP settings.

Does io.github.afferens/mcp-server need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is io.github.afferens/mcp-server open source?

Its code is public on GitHub, but the repository does not declare a standard license.

Who maintains io.github.afferens/mcp-server?

It is published by afferens. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.