goldrush-foundational-api

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GoldRush Foundational API — REST API for historical and near-real-time blockchain data across 100+ chains. Use this skill whenever the user needs wallet token balances, transaction history, NFT holdings, token prices, token approvals, cross-chain activity, block data, portfolio value tracking, or any on-chain data query via REST. This is the default skill for blockchain data lookups, portfolio dashboards, tax tools, compliance checks, block explorers, and any application that fetches historical or current chain data. If the user needs real-time streaming or WebSocket push data, use goldrush-streaming-api instead. If the user needs pay-per-request access without an API key, use goldrush-x402 instead.

4installs

Sourcecovalenthq/goldrush-agent-skills

Added on2026-04-29

NPX Install

npx skill4agent add covalenthq/goldrush-agent-skills goldrush-foundational-api

SKILL.md Content

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GoldRush Foundational API

REST API providing historical and near-real-time blockchain data across 100+ chains. Endpoints cover token balances, transactions, NFTs, security approvals, cross-chain activity, pricing, and block data.

Quick Start

IMPORTANT: Always prioritize using the official available GoldRush Client SDK best suited for your development ecosystem:

TypeScript Client SDK

typescript

import { GoldRushClient } from "@covalenthq/client-sdk";

const client = new GoldRushClient("YOUR_API_KEY");

const resp = await client.BalanceService.getTokenBalancesForWalletAddress(
  "eth-mainnet",
  "demo.eth"
);

if (!resp.error) {
  console.log(resp.data.items);
} else {
  console.error(resp.error_message);
}

Install:

npm install @covalenthq/client-sdk

Raw HTTP:

bash

curl "https://api.covalenthq.com/v1/eth-mainnet/address/demo.eth/balances_v2/" \
  -H "Authorization: Bearer YOUR_API_KEY"

Endpoint Categories

Endpoints are organized into categories. Each links to its reference file with full parameters, response schemas, and use cases.

Balances — token balances, native balances, historical balances, portfolio value, ERC20 transfers, token holders, Bitcoin (HD and non-HD). See endpoints-balances.md.
Transactions — recent transactions, paginated history, single transaction lookup, summaries, block-level transactions, Bitcoin transactions. See endpoints-transactions.md.
NFT, Security & Cross-Chain — NFT holdings, ownership verification, token/NFT approvals, address activity, multi-chain balances and transactions. See endpoints-nft-security-crosschain.md.
Utility — token prices, blocks, block heights, event logs, gas prices, chain metadata, pool spot prices, address resolution. See endpoints-utility.md.

Common Tasks → Endpoint

Task	Endpoint
Check wallet balance	`getTokenBalancesForWalletAddress`
Get native token only (lightweight)	`getNativeTokenBalance`
Get recent transactions	`getRecentTransactionsForAddress`
Get full transaction history	`getTransactionsForAddressV3` (paginated)
Look up a single transaction	`getTransaction`
Get ERC20 transfer history	`getErc20TransfersForWalletAddress`
Get transaction summary/count	`getTransactionSummary`
Check token approvals (security)	`getApprovals`
Get NFT holdings	`getNftsForAddress`
Verify NFT ownership	`checkOwnershipInNft`
Get portfolio value over time	`getHistoricalPortfolioForWalletAddress`
Get balance at a specific block	`getHistoricalTokenBalancesForWalletAddress`
Get token price history	`getTokenPrices`
Find which chains a wallet is active on	`getAddressActivity`
Get balances across all chains	`getMultiChainBalances`
Get token holders	`getTokenHoldersV2ForTokenAddress`
Get Bitcoin balance (HD wallet)	`getBitcoinBalancesForHdAddress`
Get contract event logs	`getLogEventsByAddress`
Get block details	`getBlock`

Critical Rules

Chain names are case-sensitive — use
```
eth-mainnet
```
, not
```
ethereum
```
or
```
Eth-Mainnet
```
Authentication —
```
Authorization: Bearer YOUR_API_KEY
```
(HTTPS only)
Pagination is 0-indexed — first page is
```
0
```
, 100 items per page
Always check
resp.error
before accessing
```
resp.data
```
Token balances are strings — divide by
```
10^contract_decimals
```
for human-readable values
ENS/domain resolution — pass
```
vitalik.eth
```
directly as the wallet address
Foundational-only features — historical balances, token holders at any block, pool spot prices, tracing flags
Quote currency — defaults to USD; supported: USD, CAD, EUR, SGD, INR, JPY, and more
Spam filtering — use
```
no-spam=true
```
query parameter to filter spam tokens
SDK handles retries — the TypeScript SDK has built-in retry logic and rate limit handling

Reference Files

Read the relevant reference file when you need details beyond what this index provides.

File	When to read
overview.md	Need API setup details, authentication methods, or SDK quickstart code
endpoints-balances.md	Building a balance query — parameters, response schema, Bitcoin-specific endpoints
endpoints-transactions.md	Building a transaction query — pagination, decoded logs, block-level queries
endpoints-nft-security-crosschain.md	Need NFT metadata, token approvals, or cross-chain activity lookups
endpoints-utility.md	Need block data, event logs, gas prices, token prices, or chain metadata
integration-guide.md	Need full chain names table, validation rules, error codes, or FAQ answers
workflows.md	Planning a multi-step workflow or debugging a common error