How to Eliminate LLM Hallucinations in B2B Lead Enrichment using MCP and Zod Schema Validation

Description and use

By leveraging an MCP server with strict Zod schema validation, developers eliminate LLM hallucinations in B2B lead enrichment, obtaining accurate data and paying only for successful queries.

Problem

LLMs often hallucinate firmographic data when calling external APIs, leading to inaccurate B2B lead enrichment.

Outcome

By coupling MCP with Zod schema enforcement, developers eliminate LLM hallucinations, achieve real‑time, high‑confidence B2B lead enrichment, and pay only for successful queries.

Workflow

• 1. Deploy the B2B Lead Enrichment MCP server (e.g., via npx @modelcontextprotocol/server-http).
• 2. Configure Claude Desktop by adding the MCP server entry to claude_desktop_config.json.
• 3. Define Zod schemas for tool parameters (domain, company_name, etc.).
• 4. Invoke the enrich_lead tool from the LLM; the MCP server validates input against the schema.
• 5. Receive a standardized JSON‑RPC response containing structured lead data and a confidenceScore.
• 6. Use the confidenceScore to filter results (e.g., only accept scores >0.6).
• 7. Integrate the enriched data into downstream pipelines or SDR agent workflows.

Evidence

Strict Zod Schema Enforcement: Every tool parameter is strictly typed and annotated, forcing the LLM to provide valid search strings and preventing the execution of malformed queries.

Source

Risk-Free Metered Billing model ensures that you are only billed for successful enrichments where the confidenceScore is greater than 0.6.

Source