API
An API is a defined contract that lets two software systems exchange data or trigger actions using standard requests and responses. Think of it like a restaurant menu and order slip — you ask for a dish, the kitchen prepares it, and you get exactly what you asked for.
In depth
APIs expose specific capabilities of a service through endpoints. Each endpoint accepts certain inputs — such as query parameters or a request body — and returns a predictable output with a status code. Common formats include JSON and XML.
For secure data access, you authenticate with the service's API, usually with an OAuth authentication token, API key, or signed request. Most services set rate limits and expect clients to handle pagination, retries, and errors gracefully.
Here are a few common API types:
REST: Uses HTTP actions like GET and POST with resource-based URLs.
GraphQL: Lets you specify the exact shape of the data you want in a single query.
Webhooks: Outgoing HTTP callbacks from a service to your URL when an event occurs.
Pro tip
Don't assume every API response is perfect. Check that the data you receive is valid, handle cases where fields are missing, and add a short delay before retrying if you hit errors like "Too Many Requests."
Why APIs matter
APIs connect the tools you use every day. Instead of exporting spreadsheets and copying values manually, you can pull fresh data directly from sources like Shopify, Stripe, HubSpot, or a data warehouse. This reduces manual work, speeds up analysis, and helps ensure your data stays current.
For teams that rely on consistent, trustworthy metrics, APIs are the foundation. They make it possible to centralize data from scattered systems into a single place where it can be defined, governed, and used with confidence.
APIs - In practice
Here are some practical ways you can use APIs in your metrics stack:
Automatically import business data. Schedule data retrieval from source systems for orders, subscriptions, traffic, or support tickets.
Unify scattered systems. Bring together data from billing, product, and marketing sources to build a complete picture of your business.
Add missing context. Enrich records with attributes from a CRM or data enrichment service.
React to events. Use webhooks to trigger a data refresh or write a new data point when a purchase or signup occurs.
APIs and PowerMetrics
PowerMetrics enables you to connect to and retrieve data from hundreds of services. With PowerMetrics, you can:
Retrieve data from services using built-in connectors. Bring in data from hundreds of popular services without writing code.
Use the REST connector for public APIs. Connect to and retrieve data from any service that uses the REST protocol.
Query data stored in warehouses. Pull from databases and cloud warehouses, then model and visualize the data and store metric history in PowerMetrics.
Related terms
Data Warehouse
A data warehouse is a specialized, centralized repository designed to store, organize, and filter structured data from across an organization. Unlike operational databases that handle day-to-day transactions, a warehouse is architected specifically for OLAP (Online Analytical Processing). It provides a "single source of truth" for historical data, enabling businesses to perform complex queries and generate high-level business intelligence.
Read moreData Lineage
Data lineage maps the journey of your data from origin to destination. It visually shows where data comes from, how it’s transformed, and where it’s used.
Read moreData Catalog
A data catalog is an organized inventory of a company’s data assets. This centralized, access-controlled library typically lists datasets, tables, and fields alongside owners, definitions, and lineage so people can search, understand, and use data with confidence.
Read more