Apollo

MCP server for the Apollo.io API. Lets LLMs search and enrich people and company data.

Tools

Tool	Description	Credits
search_people	Search contacts by title, location, seniority, company	No
search_organizations	Search companies by industry, size, location	Yes
enrich_person	Enrich a person by email, LinkedIn URL, or name+domain	Yes
enrich_organization	Enrich a company by domain	Yes
bulk_enrich_people	Enrich up to 10 people at once	Yes
bulk_enrich_organizations	Enrich up to 10 companies at once	Yes

Setup

Prerequisites

• Node.js 20+
• An Apollo.io API key

Local development

cp .env.example .env
# Edit .env and add your APOLLO_API_KEY

npm install
npm run dev

The server starts on http://localhost:3000 with:

• POST /mcp — MCP endpoint (Streamable HTTP)
• GET /health — Health check

Docker

cp .env.example .env
# Edit .env and add your APOLLO_API_KEY

docker compose up --build

Connecting an MCP client

Add this to your MCP client configuration (e.g. Claude Desktop):

{
  "mcpServers": {
    "apollo": {
      "url": "http://localhost:3000/mcp"
    }
  }
}

For a remote server, replace localhost:3000 with your server's address.

Environment variables

Variable	Required	Default	Description
APOLLO_API_KEY	Yes	—	Your Apollo.io API key
PORT	No	3000	Server port
APOLLO_BASE_URL	No	https://api.apollo.io	Apollo API base URL