Coresignal MCP server

Coresignal MCP v2

The official Model Context Protocol server for Coresignal — bring fresh B2B data on 895M+ employees, 70M+ companies, and 468M+ job postings straight into your AI assistant.

https://mcp.coresignal.com/mcp/v2

Search in plain natural language, pull full records, enrich contacts with verified emails, and export large result sets as downloadable files — all from Claude, Cursor, Codex, VS Code, or any other MCP-compatible client.

Features

• OAuth 2.1 authentication — sign in with your Coresignal dashboard account; no API keys in config files.
• Natural-language search with match evidence in every result row, so you can see why each record matched.
• Cost transparency — every response reports credits_consumed, and expensive calls ask for confirmation before spending.
• Field discovery — entity_fields finds the right field names by keyword, free, without loading the full 300+ field vocabulary into context.
• File downloads — large result sets are stored server-side and returned as a download link instead of flooding the chat.
• artifactread** pages delivered files back into the conversation for free — works even in clients with no filesystem access.

Prerequisites

• A Coresignal account with an active subscription (credits) and a team API key provisioned in the dashboard. The MCP server resolves your team's key automatically after sign-in — you never paste it into a config file. No subscription yet? Start with the 7-day free trial — it includes 2,000 credits. See the plan comparison.

On first connection your client opens a browser window to sign in to the Coresignal dashboard. That's the whole setup — no environment variables, no secrets.

Client setup

Claude Desktop

Claude Desktop supports remote MCP servers natively via Connectors:

1. Open Settings → Connectors → Add custom connector.
2. Name: Coresignal, URL: https://mcp.coresignal.com/mcp/v2.
3. Click Add, then Connect — a browser window opens to sign in to your Coresignal dashboard account.

Important — enable file downloads: Claude Desktop blocks downloads from domains it doesn't know. To download result files (large fetches are delivered as links), add mcp.coresignal.com to the Domain allowlist in Claude Desktop settings (on Team/Enterprise plans your admin manages this). Without it, download links from the server will be blocked — though you can always read the data back in-chat with the free artifact_read tool instead. See File downloads.

Claude Code

claude mcp add --transport http coresignal https://mcp.coresignal.com/mcp/v2

Then inside a session run /mcp, select coresignal, and complete the browser sign-in. Re-run /mcp any time you need to re-authenticate.

Codex (OpenAI Codex CLI)

codex mcp add coresignal --url https://mcp.coresignal.com/mcp/v2

A browser window opens to sign in to your Coresignal dashboard account.

Cursor

Add to ~/.cursor/mcp.json:

{
  "mcpServers": {
    "coresignal": {
      "url": "https://mcp.coresignal.com/mcp/v2"
    }
  }
}

Cursor detects that the server requires authentication and shows a Needs login prompt — click it to complete the browser sign-in.

OpenCode

Add Coresignal MCP:

opencode mcp add coresignal --url https://mcp.coresignal.com/mcp/v2

Authenticate:

opencode mcp auth coresignal

A browser window opens to sign in to your Coresignal dashboard account.

Shortened. The full README is on GitHub.