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.