Erc20 Balance

Reads an ERC-20 token balance on-chain across any supported EVM chain, including Base, Ethereum, Arbitrum, Optimism, and Polygon.

Overview

Reads an ERC-20 token balance on-chain across any supported EVM chain, including Base, Ethereum, Arbitrum, Optimism, and Polygon. Co-fetches decimals to return both raw bigint and decimal-formatted balance. Supports historical block parameter. Useful for agent wallet introspection, payment reconciliation, treasury monitoring. Use it as a balanceOf reader, wallet balance lookup, or multi-chain ERC20 balance API.

Endpoint

Method	Endpoint	Price	Description
POST	/v1/marketplace/api/erc20-balance-573	$0.00575	Invoke Erc20 Balance (Blockchain) and return the upstream response.

How to call it

Requests are paid per call over the x402 protocol. Call the endpoint, receive a 402 Payment Required quote, then repeat the request with the signed payment header. The SDKs do both steps for you.

# 1. Ask for a quote
curl -i -X POST https://api.jarvisclaw.ai/v1/marketplace/api/erc20-balance-573 \
  -H 'Content-Type: application/json' \
  -d '{}'

# 2. Pay it (the SDK signs and retries for you)
curl -X POST https://api.jarvisclaw.ai/v1/marketplace/api/erc20-balance-573 \
  -H 'Content-Type: application/json' \
  -H 'X-PAYMENT: <signed-payload>' \
  -d '{}'

Open in the marketplace