Subgraphs let you query on-chain data with GraphQL, eliminating the need for crawling logs or relying on RPC calls. With Ormi’s 0xGraph, anyone can deploy and query subgraphs in just a few steps, completely free.
This tutorial will guide you through creating and deploying a subgraph that indexes USDC (ERC-20) transfers on Ethereum mainnet.
What you’ll need
An Ormi Labs account
Graph CLI installed (npm install -g @graphprotocol/graph-cli)
node.js installed
Git installed- The USDC contract on Ethereum mainnet: 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48
Tip: USDC launched on Ethereum in Sept 2018; you can confirm addresses per chain in Circle’s docs if you ever target other networks.
Getting started
Go to Ormi and sign in.- From the dashboard, create an API key for deployments.
Keep this page open, we’ll need the API key to deploy a subgraph.
Running Subgraph CLI
Run the Graph CLI init flow:
graph init usdc-subgraph
When prompted:
Network: Ethereum Mainnet
Source: Smart contract: Ethereum
Subgraph slug:
Contract address: 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48
Contract name:
Start block: (optional but recommended)
Setting up the Subgraph
cd <subgraph-name>
graph codegen
graph build
Deploy the Subgraph to Ormi
Return to your API page and copy the information to paste it in the section below.
graph deploy <graph-name> --node https://subgraph.api.ormilabs.com/deploy --ipfs https://subgraph.api.ormilabs.com/ipfs --deploy-key <API key>
Track sync status
You can check syncing in the dashboard by going to the Subgraphs tab:
Query your USDC subgraph
Click into the specific Subgraph
Enable the private GraphQL box to query via GraphQL link
Keep in mind that headers need to include your API key and if it doesn’t, you will not be able to make queries
{
"Authorization": <API key>
}
Example query for most recent transfer events:
query LatestTransfers {
transfers(first: 5, orderBy: blockTimestamp, orderDirection: desc) {
id
from
to
blockTimestamp
}
}
Conclusion
You just deployed a USDC subgraph via Ormi’s 0xgraph. From here, you can add the endpoint to your app to reflect real-time activity on USDC transfers.
About Ormi
Ormi is the next-generation data layer for Web3, purpose-built for real-time, high-throughput applications like DeFi, gaming, wallets, and on-chain infrastructure. Its hybrid architecture ensures sub-30ms latency and up to 4,000 RPS for live subgraph indexing.
With 99.9% uptime and deployments across ecosystems representing $50B+ in TVL and $100B+ in annual transaction volume, Ormi is trusted to power the most demanding production environments without throttling or delay.
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