@sifr0/mcp

SIFR-0 MCP Server — Business discovery for AI agents via Model Context Protocol.

Search for dentists, law firms, staffing agencies, IT providers, contractors, caterers, memory providers, and any business type — directly from Claude, Gemini, or any MCP-compatible client.

Quick start

npx @sifr0/mcp

Configure with Claude Desktop

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

{
  "mcpServers": {
    "sifr0": {
      "command": "npx",
      "args": ["-y", "@sifr0/mcp"]
    }
  }
}

Configure with Claude Code

claude mcp add sifr0 -- npx -y @sifr0/mcp

Tools

search_businesses

Find businesses matching specific criteria.

| Parameter | Description | |-----------|-------------| | category | dentist, staffing-agency, managed-services, hvac, law-firm, catering, saas, memory-provider | | near_lat, near_lng | Geo search coordinates | | radius_km | Search radius (default 25) | | city, state | Location filter | | type | business, saas, government, nonprofit, freelancer | | query | Free-text search | | insurance | Filter by certification (Aetna, SOC2-Type-II) | | language | Filter by language (English, Spanish) | | verified_only | Verified businesses only |

get_business_manifest

Get complete details for a business — services, pricing, booking methods, hours, policies, trust signals.

validate_manifest

Check if a SIFR-0 manifest is correctly formatted before publishing.

registry_stats

Get current registry statistics.

Example prompts

Once connected, try in Claude:

• "Find me a staffing agency in San Francisco"
• "Search for SOC2-certified managed service providers near Austin, TX"
• "Find emergency HVAC repair within 50km of San Jose"
• "Find corporate caterers in the Bay Area"
• "Find immigration lawyers in New York who speak Mandarin"
• "Find memory providers that support local deployment"
• "How many businesses are in the SIFR-0 registry?"

Environment variables

| Variable | Description | Default | |----------|-------------|---------| | SIFR0_API_URL | Registry API URL | https://sifr-zero-registry.replit.app | | SIFR0_API_KEY | API key (optional) | — |

What is SIFR-0?

SIFR-0 is the open protocol for business-to-agent discovery. Businesses publish a JSON manifest at /.well-known/sifr0.json. Agents query the SIFR-0 registry to find them.

• UCP (Google/Shopify) = shopping checkout
• A2A (Google) = agent-to-agent communication
• MCP (Anthropic) = agent-to-tool connections
• SIFR-0 = business-to-agent discovery

SIFR-0 covers the 80% of businesses that aren't online retailers.

Part of the DJZS ecosystem

• SIFR-0 = visibility layer (Can I find this business?)
• DJZS Protocol = trust layer (Can I trust this business?)

sifr0.dev · github.com/SIFR0-dev/sifr-0 · djzs.ai

License

Apache 2.0