Apollo Install & Auth

Overview

Set up Apollo.io API client and configure authentication credentials for B2B sales intelligence access.

Prerequisites

• Node.js 18+ or Python 3.10+
• Package manager (npm, pnpm, or pip)
• Apollo.io account with API access
• API key from Apollo dashboard (Settings > Integrations > API)

Instructions

Step 1: Install SDK/HTTP Client

set -euo pipefail
# Node.js (using axios for REST API)
npm install axios dotenv

# Python
pip install requests python-dotenv

Step 2: Configure Authentication

# Set environment variable
export APOLLO_API_KEY="your-api-key"

# Or create .env file
echo 'APOLLO_API_KEY=your-api-key' >> .env

Step 3: Create Apollo Client

// apollo-client.ts
import axios from 'axios';
import dotenv from 'dotenv';

dotenv.config();

export const apolloClient = axios.create({
  baseURL: 'https://api.apollo.io/v1',
  headers: {
    'Content-Type': 'application/json',
    'Cache-Control': 'no-cache',
  },
  params: {
    api_key: process.env.APOLLO_API_KEY,
  },
});

Step 4: Verify Connection

async function verifyConnection() {
  try {
    const response = await apolloClient.get('/auth/health');
    console.log('Apollo connection:', response.status === 200 ? 'OK' : 'Failed');  # HTTP 200 OK
  } catch (error) {
    console.error('Connection failed:', error.message);
  }
}

Output

• HTTP client configured with Apollo base URL
• Environment variable or .env file with API key
• Successful connection verification output

Error Handling

Error	Cause	Solution
401 Unauthorized	Invalid API key	Verify key in Apollo dashboard
403 Forbidden	Insufficient permissions	Check API plan and permissions
429 Rate Limited	Exceeded quota	Implement backoff, check usage
Network Error	Firewall blocking	Ensure outbound HTTPS to api.apollo.io

Examples

TypeScript Setup

import axios, { AxiosInstance } from 'axios';

interface ApolloClientConfig {
  apiKey: string;
  baseURL?: string;
}

export function createApolloClient(config: ApolloClientConfig): AxiosInstance {
  return axios.create({
    baseURL: config.baseURL || 'https://api.apollo.io/v1',
    headers: {
      'Content-Type': 'application/json',
    },
    params: {
      api_key: config.apiKey,
    },
  });
}

const client = createApolloClient({
  apiKey: process.env.APOLLO_API_KEY!,
});

Python Setup

import os
import requests
from dotenv import load_dotenv

load_dotenv()

class ApolloClient:
    def __init__(self, api_key: str = None):
        self.api_key = api_key or os.environ.get('APOLLO_API_KEY')
        self.base_url = 'https://api.apollo.io/v1'

    def _request(self, method: str, endpoint: str, **kwargs):
        url = f"{self.base_url}/{endpoint}"
        params = kwargs.pop('params', {})
        params['api_key'] = self.api_key
        return requests.request(method, url, params=params, **kwargs)

client = ApolloClient()

Resources

• Apollo API Documentation
• Apollo Dashboard
• Apollo API Rate Limits

Next Steps

After successful auth, proceed to apollo-hello-world for your first API call.