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Diego Costa
Diego Costa

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Eliminating LLM Hallucinations in Sales Agents with MCP-Native B2B Lead Enrichment

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Eliminating LLM Hallucinations in Sales Agents with MCP-Native B2B Lead Enrichment

To stop LLMs from hallucinating B2B firmographics and contact details, developers must use a Model Context Protocol (MCP) server that enforces strict type safety and schema validation at the transport layer. The B2B Lead Enrichment MCP API provides real-time company profiles and intent data directly to agents via JSON-RPC, ensuring parameter precision through native Zod-annotated schemas that prevent model "creativity" in data retrieval.

Core Features of the MCP Enrichment Server

Unlike traditional REST wrappers, this B2B lead enrichment MCP server leverages the Model Context Protocol to provide a stateful, tool-based interface for LLMs like Claude 3.5 Sonnet and GPT-4o. By using strict Zod schema annotations, the server forces the model to extract and pass exact parameters (e.g., valid TLDs for domain or standardized company_name) before the request ever hits the data layer.

  • Firmographic Intelligence: Real-time access to employee counts, revenue brackets, and HQ locations.
  • Technographic Stack Tracing: Live detection of a company's software stack to identify competitive displacements or integration opportunities.
  • Intent Signal Analysis: Aggregated signals that determine if a lead is in an active buying cycle.
  • Zero-Hallucination Guardrails: The MCP tool definition provides the LLM with a clear description of available fields, ensuring it only requests data that actually exists in the underlying index.

Native Configuration for Claude Desktop and Cursor

To give your AI agent access to live B2B data, add the following to your claude_desktop_config.json or your Cursor MCP settings. This configuration connects your local environment directly to the production enrichment engine.

{
  "mcpServers": {
    "b2b-enrichment": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-http",
        "--url",
        "https://lead-enrichment-mcp.agent-infra.workers.dev/mcp"
      ],
      "env": {
        "ENRICHMENT_API_KEY": "YOUR_FREE_API_KEY"
      }
    }
  }
}
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Standardized JSON-RPC Response Payload

When your agent calls the enrich_lead tool, the MCP server returns a structured response that the LLM can parse with 100% reliability. This eliminates the need for complex prompt engineering to format raw text into JSON.

{
  "jsonrpc": "2.0",
  "result": {
    "companyName": "Acme Corp",
    "industry": "Cloud Infrastructure",
    "technographics": ["Kubernetes", "AWS", "Terraform", "PostgreSQL"],
    "intentSignals": {
      "hiringTrend": "High",
      "fundingRound": "Series C",
      "expansionSignal": "Opening EMEA Office"
    },
    "confidenceScore": 0.94,
    "status": "enriched"
  }
}
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Risk-Free Metered Billing for SDR Swarms

Building autonomous SDR swarms requires a cost structure that scales with success, not volume. This MCP server utilizes a Risk-Free Metered Billing model. Instead of paying for every API call, you are only billed for successful enrichments that return a Confidence Score > 0.6.

If the database returns low-quality data or cannot find the lead, the transaction cost is $0. This allows you to run massive batch operations across thousands of prospects without the risk of burning your budget on "not found" results or hallucinated data points.

Get Started with the Free Tier Today

Ready to transform your LLM into a data-driven sales powerhouse? Visit our dashboard to generate your API key and start enriching leads with native MCP tools.

Get Your Free API Key at lead-enrichment-mcp.agent-infra.workers.dev

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