> ## Documentation Index
> Fetch the complete documentation index at: https://docs.caylex.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Coresignal

> Comprehensive B2B data for companies and jobs

The Coresignal MCP Server brings comprehensive, multi-source B2B data directly into your Caylex-powered AI agents, enabling them to query up-to-date information on companies, employees, and job postings through a single integration. Built on Coresignal's Multi-source Company API, Multi-source Employee API, and Base Jobs API, it equips agents to support a wide range of use cases including recruitment intelligence, competitive market analysis, lead generation, and business research. Within Caylex, agents can construct precise B2B lists, look up detailed company profiles, explore employee career histories, and retrieve active job listings — all in real time. Authentication is handled via a Coresignal API key passed as a request header, and all requests consume credits from your existing Coresignal credit balance.

<Warning>
  **Prerequisites:**

  * An active Coresignal account with a valid API key, obtainable from the Coresignal self-service dashboard at dashboard.coresignal.com.
  * Sufficient Coresignal credit balance, as each MCP request deducts credits from the same pool used by direct API calls.
</Warning>

<Note>
  **Important API details:**

  * All requests made through the MCP server consume credits from your Coresignal account's existing credit balance — monitor usage to avoid exhausting your quota.
  * The server exposes three data entities: coresignal\_company\_multisource\_api (company data), coresignal\_employee\_multisource\_api (employee data), and coresignal\_job\_api (job posting data).
  * Authentication requires a valid Coresignal API key, which must be obtained from the Coresignal self-service dashboard and supplied as the 'apikey' header value.
</Note>

## Server Details

| Property        | Value                                                            |
| --------------- | ---------------------------------------------------------------- |
| **Transport**   | Streamable HTTP                                                  |
| **Server Type** | External                                                         |
| **Endpoint**    | [https://mcp.coresignal.com/mcp](https://mcp.coresignal.com/mcp) |
| **Categories**  | SMS & Voice, Communication & Support                             |

## Authentication

This server supports the following authentication method:

### Header Authentication

This server authenticates via HTTP headers. During the server onboarding flow, you will be prompted to confirm the required headers. Note that you do not provide the values for the headers during the server on-boarding.
Header values are provided by the users during the [Auth Link](/auth/auth-links) flow.

## Getting Started

<Steps>
  <Step title="Add the server">
    Navigate to the **Server Library** and click on the **New Server** button. Find **Coresignal** in the Caylex Catalog.
  </Step>

  <Step title="Server Onboarding flow">
    Go through the server onboarding flow.
  </Step>

  <Step title="Use in a project">
    Add the server to a [project](https://app.caylex.dev/projects) by configuring project connections. Its tools are now available to any agents connected to that project.
  </Step>
</Steps>

## Related Servers

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## References

<CardGroup cols={1}>
  <Card title="https://docs.coresignal.com/mcp/coresignal-mcp" href="https://docs.coresignal.com/mcp/coresignal-mcp" icon="arrow-up-right-from-square" />

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