| name | goldrush-api |
| description | Query blockchain data across 100+ chains: wallet balances, token prices, transactions, DEX pairs, and real-time OHLCV streams via the GoldRush API by Covalent. |
GoldRush API
Overview
GoldRush by Covalent provides blockchain data across 100+ chains through a unified REST API, real-time WebSocket streams, a CLI, and an x402 pay-per-request proxy. This skill enables AI agents to query wallet balances, token prices, transaction history, NFT holdings, and DEX pair data without building chain-specific integrations.
When to Use This Skill
- Retrieving wallet token balances or total portfolio value across any chain
- Fetching transaction history or decoded event logs for an address
- Getting current or historical token prices (USD or native)
- Monitoring DEX pairs, liquidity events, and real-time OHLCV candles via WebSocket
- Building block explorers, portfolio dashboards, tax tools, or DeFi analytics
- Accessing on-chain data with no signup via x402 pay-per-request
How It Works
Step 1: Get credentials
Sign up at https://goldrush.dev for a free API key. For agent-native no-signup access, use the x402 proxy instead.
Step 2: Set your API key
export GOLDRUSH_API_KEY="your_api_key_here"
Step 3: Query data
REST API (most endpoints):
curl -H "Authorization: Bearer $GOLDRUSH_API_KEY" "https://api.covalenthq.com/v1/eth-mainnet/address/0xADDRESS/balances_v2/"
CLI (quick terminal queries):
npx @covalenthq/goldrush-cli balances --chain eth-mainnet --address 0xADDRESS
SDK (in code):
import GoldRushClient from "@covalenthq/client-sdk";
const client = new GoldRushClient(process.env.GOLDRUSH_API_KEY);
const resp = await client.BalanceService.getTokenBalancesForWalletAddress(
"eth-mainnet", "0xADDRESS"
);
Examples
Example 1: Token Balances
curl -H "Authorization: Bearer $GOLDRUSH_API_KEY" "https://api.covalenthq.com/v1/eth-mainnet/address/0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045/balances_v2/"
Example 2: Token Price History
curl -H "Authorization: Bearer $GOLDRUSH_API_KEY" "https://api.covalenthq.com/v1/pricing/historical_by_addresses_v2/eth-mainnet/USD/0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48/"
Example 3: Transaction History
curl -H "Authorization: Bearer $GOLDRUSH_API_KEY" "https://api.covalenthq.com/v1/eth-mainnet/address/0xADDRESS/transactions_v3/"
Example 4: Real-time OHLCV via WebSocket
const ws = new WebSocket("wss://streaming.covalenthq.com/v1/eth-mainnet/ohlcv");
ws.on("message", (data) => console.log(JSON.parse(data)));
Best Practices
✅ Use chain slugs: eth-mainnet, matic-mainnet, base-mainnet, bsc-mainnet — full list at https://goldrush.dev/docs/networks
✅ Store API key in GOLDRUSH_API_KEY env var — never hardcode
✅ Use WebSocket streams for real-time data rather than polling REST
✅ Use SDK cursor pagination for large result sets
❌ Don't use x402 for high-volume use cases — get a standard API key instead
❌ Don't use chain IDs (e.g., 1) — use chain slugs (e.g., eth-mainnet)
Security & Safety Notes
- API key in
GOLDRUSH_API_KEY environment variable only
- x402 payments use USDC on Base — set spending limits before autonomous agent use
- Read-only data API — no write operations, no transaction signing
Common Pitfalls
Problem: 401 Unauthorized
Solution: Ensure API key is in Authorization: Bearer header, not query string
Problem: chain_name not found
Solution: Use chain slug format — see https://goldrush.dev/docs/networks
Problem: Empty results for new wallet
Solution: Some endpoints require on-chain activity; new wallets with no transactions return empty arrays, not errors
Related Skills
- @goldrush-streaming-api — real-time WebSocket DEX pair and OHLCV streams
- @goldrush-x402 — pay-per-request blockchain data without API key
- @goldrush-cli — terminal-first blockchain data queries
