Tutorial: Use APIs from the Marketplace

Find an API, test it for free, wire it into your app, and pay only for what you use.

What you need

If you just want to browse and try demos, you do not even need USDC. Demo mode is completely free.

Install and start the control center via Docker (see Installation). Open the web console and create your account.

Go to the Finance tab. Your deposit address is shown on the page. Send funds to it:

USDC — this is what you pay for API calls. $10 gets you thousands of calls for most APIs.
ETH — a small amount for transaction fees. $2-5 lasts a long time.

Both can be sent from any exchange (Coinbase, Kraken, etc.) or another wallet.

In the web console, click the Catalog tab. You will see every API available on the marketplace.

Each listing shows the name, description, price per call, protocol, and live/offline status. Use the search bar to filter by keyword.

Every API comes with free demo samples. Click an API, then click Try Demo.

Demo mode returns real data captured by the API owner when they registered. It shows you the response format, fields, and data types — all for free.

Select the API first. Click Select on any API to add it to your My APIs list. All new APIs start in demo mode by default.

Every API includes an OpenAPI specification. Your control center uses it to generate a ready-to-use client library.

The SDK handles authentication and request formatting. You just call methods. See SDKs for code examples.

When you are ready to use live data, switch the API from demo to production mode in My APIs (flip the toggle from "Demo" to "On").

Now every call returns live data. You are charged the per-call price automatically from your USDC balance.

If you generated an SDK, nothing changes in your code. The same methods that returned demo data now return live data.

Each API in the catalog has an interactive Swagger panel where you can test individual endpoints with custom parameters directly in the web console.

The Dashboard in your web console tracks everything:

Set up email alerts for low balance so you never run out mid-operation.

Always try the demo first. Check that the data format matches what you need before spending USDC.

Start with $10-20 of USDC. See how many calls your app actually makes, then fund accordingly.

Each API has an interactive Swagger panel in the web console. Use it to explore endpoints before writing code.

Before relying on an API, check its status in the catalog. A green "Live" badge means it is available.