MCP Servers

Apollo MCP

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

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README

Apollo MCP

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

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