# Clay — MCP Server

> Enrich and research accounts and contacts from a conversation, across dozens of data sources.

**Source:** https://mcpplaygroundonline.com/mcp-servers/clay  
**Transport:** http  
**Requires auth:** Yes

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## What it does

The server exposes Clay’s enrichment and table operations as MCP tools. People and company lookup is the core — resolve a name, domain or email into a profile assembled from whichever providers have coverage, without you choosing between them. Table operations let an agent read and write rows in Clay tables, which is where go-to-market teams actually keep lists, so enrichment results land somewhere usable rather than in a transcript. Research workflows can be triggered, meaning the agent can kick off multi-step enrichment and collect the output. The genuine advantage over calling a single data vendor is coverage: Clay’s waterfall model falls through to another provider when the first has no record, and an agent asking a question does not need to know or care which one answered.

## Tools exposed

- person enrichment — resolve a person to a profile across providers
- company enrichment — firmographics, technographics and headcount for a domain
- table read and write — work with rows in existing Clay tables
- search — find people or companies matching criteria
- workflows — trigger an enrichment workflow and read the result

## Example queries you can run

- "Enrich these twenty domains with headcount, funding stage and tech stack."
- "Find the current head of engineering at each of these companies."
- "Which accounts in this table have changed headcount by more than 20% this year?"
- "Add the enriched results to the outbound table and flag anything with no email found."

## Details

- **Recommended model:** anthropic/claude-sonnet-4.5 — Enrichment returns partial, conflicting records across providers. Sonnet 4.5 reconciles them and says what it is unsure of, rather than picking the first value and asserting it.
- **Transport:** http
- **Authentication:** Required — A Clay account credential. Enrichment consumes credits from your plan, so a large batch has a direct cost.
- **Hosted endpoint:** https://mcp.clay.earth/mcp
- **Official source:** [Clay](https://www.clay.com/)

## Frequently asked questions

### What is the Clay MCP server?

A hosted MCP server for Clay, the go-to-market data platform. It exposes person and company enrichment, table operations and research workflows as MCP tools an AI assistant can call.

### Does enrichment cost credits?

Yes. Clay bills enrichment by credit, and an agent handed a large list will spend them. Bound the batch in your prompt — this is the main operational risk of pointing an agent at it.

### Why use Clay rather than one data provider directly?

Coverage. No single provider has complete data, and Clay waterfalls through several until one returns a record. An agent gets a usable answer more often without you building the fallback logic yourself.

### Can it write results back into my lists?

Yes — table read and write means enriched data lands in the Clay tables your team already works from, rather than in a chat window you then have to copy out of.

### Is the data reliable enough to act on?

Treat it as leads, not facts. Enrichment data is inferred and ages quickly, particularly job titles. Ask the model to surface confidence and source where it can, and verify anything before it reaches a customer-facing message.

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_Test this server across 40+ models on MCP Playground: https://mcpplaygroundonline.com/mcp-servers/clay — free, no install._