API

What is an API?

API (Application Programming Interface) is the set of rules and protocols that lets different systems exchange data in a standardized way. It works like a "waiter" between programs: you ask for information, the API delivers it.

In digital marketing, APIs are behind almost everything:

• Scheduling an Instagram post from another tool
• Pulling Meta Ads campaign data into a dashboard
• Sending a purchase event to the Pixel via Conversions API
• Integrating e-commerce with email automation
• Connecting CRM with WhatsApp Business

How it works

Every API has:

• Endpoints: addresses that accept requests. Ex: /v18.0/instagram_business_account
• HTTP methods: GET (read), POST (create), PUT (update), DELETE (remove)
• Authentication: token, API key or OAuth
• Response format: almost always JSON in 2026
• Rate limits: how many requests per minute/hour

API types

• REST: dominant standard. Simple, HTTP-based
• GraphQL: more flexible, client asks for exactly what it wants (Meta uses it in parts)
• SOAP: older, used in legacy systems
• WebSocket: persistent connection, real-time
• Webhooks: not a "traditional" API, it's a reverse notification (see Webhook)

Practical example

You want to pull how many followers your account has right now. Flow via Instagram API:

1. You authenticate via OAuth and get a token
2. You GET https://graph.instagram.com/v18.0/me?fields=followers_count&access_token=YOUR_TOKEN
3. API responds:

{
  "id": "17841401234567890",
  "followers_count": 28430
}

A dashboard showing "28,430 followers" makes that call behind the scenes.

Common APIs in digital marketing

• Meta Graph API (Instagram, Facebook, WhatsApp Business)
• TikTok Marketing API
• LinkedIn API
• YouTube Data API
• Google Ads API
• Meta Conversions API
• Shopify Admin API
• OpenAI / Anthropic API (AI)

Common mistakes

• Saving API tokens in public source code (leakage)
• Not respecting rate limits and getting blocked
• Not handling errors (APIs sometimes return 500, 429, 401)
• Using deprecated APIs (Meta v9 no longer exists — always v18+ in 2026)
• Not caching responses and burning quota

For most brands, you don't need to integrate APIs directly — just use a platform like Mais Social that already does it under the hood.