Getting started with the Blockchain API

Create an account, get an API key, and make your first JSON-RPC request.

This guide takes you from a new account to your first JSON-RPC request in a few minutes. Everything happens in the Blockops dashboard. For the wallet platform, start with First wallet & transaction instead.

1. Create your account

   Sign up with Google, GitHub, or an email address, then verify your email. See Create your account for the details of each option.

2. Create a project and choose a network

   Open Blockchain API in the dashboard and create a project. Give it a unique name and select the network you want to connect to, for example Ethereum Mainnet or Ethereum Sepolia.

3. Copy your endpoint and API key

   Once a network is selected, the project shows an HTTP endpoint for standard JSON-RPC requests and a WSS endpoint for subscriptions. Your API key is shown on the right of the project page.

   Authenticate either with the header authorization: APIKEY <your key> or with the query string ?api_key=<your key>.

4. Make your first request

   Ask the network for its latest block number:

   curl -H "Content-Type: application/json" \
     -H "authorization: APIKEY <your key>" \
     -d '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1}' \
     https://ethereum-rpc.blockops.network
   

   A successful response looks like this:

   {"jsonrpc":"2.0","id":1,"result":"0x10666b"}
   

   Every request is a POST. Private endpoints allow 1000 requests per second; see Rate limits & error codes before you go to production.

Keep your key safe

Treat the API key as a secret. If it is exposed, rotate it from the project page with Rotate Key; the old key stops working immediately. See Endpoints, keys & authentication.

Where to next

Network guides

Endpoints and examples for each supported network.

Common RPC methods

The methods most integrations use, with cURL, wscat and Polkadot JS examples.

Deploy a node

Run your own nodes with Mission Control on a cloud provider or your own servers.

Support

How to reach us when the documentation does not answer your question.