Apollo Hello World

Overview

Minimal working example demonstrating core Apollo.io functionality - searching for people and enriching contact data.

Prerequisites

• Completed apollo-install-auth setup

• Valid API credentials configured

• Development environment ready

Instructions

Step 1: Create Entry File

Create a new file for your hello world example.

Step 2: Import and Initialize Client

import axios from 'axios';

const apolloClient = axios.create({ baseURL: 'https://api.apollo.io/v1', headers: { 'Content-Type': 'application/json' }, params: { api_key: process.env.APOLLO_API_KEY }, });

Step 3: Search for People

async function searchPeople() { const response = await apolloClient.post('/people/search', { q_organization_domains: ['apollo.io'], page: 1, per_page: 10, });

console.log('Found contacts:', response.data.people.length); response.data.people.forEach((person: any) => { console.log(- ${person.name} (${person.title})); }); }

searchPeople().catch(console.error);

Output

• Working code file with Apollo client initialization

• Successful API response with contact data

• Console output showing:

Found contacts: 10

• John Smith (VP of Sales)
• Jane Doe (Account Executive) ...

Error Handling

Error Cause Solution

401 Unauthorized Invalid API key Check APOLLO_API_KEY environment variable

422 Unprocessable Invalid request body Verify request payload format

429 Rate Limited Too many requests Wait and retry with exponential backoff

Empty Results No matching contacts Broaden search criteria

Examples

TypeScript Example - People Search

import axios from 'axios';

const client = axios.create({ baseURL: 'https://api.apollo.io/v1', params: { api_key: process.env.APOLLO_API_KEY }, });

interface Person { id: string; name: string; title: string; email: string; organization: { name: string }; }

async function main() { // Search for people at a company const { data } = await client.post('/people/search', { q_organization_domains: ['stripe.com'], person_titles: ['engineer', 'developer'], page: 1, per_page: 5, });

console.log('People Search Results:'); data.people.forEach((person: Person) => { console.log( ${person.name} - ${person.title} at ${person.organization?.name}); }); }

main().catch(console.error);

Python Example - Company Enrichment

import os import requests

APOLLO_API_KEY = os.environ.get('APOLLO_API_KEY') BASE_URL = 'https://api.apollo.io/v1'

def enrich_company(domain: str): response = requests.get( f'{BASE_URL}/organizations/enrich', params={ 'api_key': APOLLO_API_KEY, 'domain': domain, } ) return response.json()

if name == 'main': company = enrich_company('apollo.io') org = company.get('organization', {}) print(f"Company: {org.get('name')}") print(f"Industry: {org.get('industry')}") print(f"Employees: {org.get('estimated_num_employees')}")

Resources

• Apollo People Search API

• Apollo Organization API

• Apollo API Examples

Next Steps

Proceed to apollo-local-dev-loop for development workflow setup.