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ERC-20 Total Supply Lookup (Ethereum Mainnet)
x402
ERC-20 Total Supply Lookup (Ethereum Mainnet) is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-27).
Returns the raw and human-readable totalSupply of any ERC-20 token contract on Ethereum mainnet via a read-only eth_call.
Price / call$0.001
Success—
StatusUnknown
How this service works
Call when an agent needs ERC-20 totalSupply for one Ethereum mainnet token, raw and human when decimals() is readable. Send token. Read-only eth_call on eip155:1. No spend. Send JSON {"token":"0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48"}. Exact $0.001 USDC on Base. Try unpaid POST /v1/sandbox/eth-total-supply first.
Output
Returns a JSON object containing total_supply_raw (the integer value directly from the contract's totalSupply() call) and total_supply (the human-readable value scaled by decimals() if that function is readable on the contract).
Example use cases
Check USDC circulating supply
“Look up the total supply of USDC on Ethereum mainnet — contract 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 — and show me both the raw integer and the formatted amount with decimals applied.”
Verify DAI token issuance
“Can you fetch the on-chain totalSupply for DAI (0x6B175474E89094C44Da98b954EedeAC495271d0F) on Ethereum and tell me how many DAI tokens currently exist in human-readable form?”
Monitor WETH supply for DeFi dashboard
“Get the current total supply of Wrapped Ether (WETH, contract 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2) on Ethereum mainnet so I can display it on my DeFi analytics dashboard.”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/eth-total-supply?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, read-only on-chain totalSupply lookup for a single ERC-20 token on Ethereum mainnet and want both raw and decimal-adjusted values in one call. Prefer it over general RPC providers when you want a simple REST interface without managing JSON-RPC directly, and over block explorer APIs when you need guaranteed freshness via direct eth_call rather than indexed data.
Side effects
- Invalid or non-ERC-20 contract address returns an error or empty result
- Contract does not implement decimals() — raw supply is returned but human-readable value may be absent
- Non-mainnet addresses (e.g. testnets or L2s) will not resolve correctly
- Malformed address format (not a valid checksummed Ethereum address) returns a validation error
- Payment failure on Base for the $0.001 USDC fee blocks the request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| token | string | ERC-20 contract on Ethereum mainnet. Example: 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48. Returns total_supply_raw and a human total_supply when decimals() is readable. Read-only. |
Tags
x402
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