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AUN Base Token Lookup
x402
AUN Base Token Lookup is a paid API for AI agents from a-upgradenet.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-22).
Looks up ERC-20 token metadata on the Base blockchain by contract address, returning name, symbol, decimals, supply, and contract status.
Price / call$0.002
Success—
StatusUnknown
How this service works
Base Token Info: name, symbol, decimals, total supply and contract check for any ERC-20 on Base mainnet. $0.002 per call.
Output
Returns a JSON object with the token's name, symbol, chain (base), decimals, contract address, total supply as a human-readable number and raw integer, and boolean flags confirming whether the address is an ERC-20 and a deployed contract, along with a status field indicating lookup completion.
Example use cases
Verify token before DeFi swap
“Before I swap into this token, can you check if 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base is a real ERC-20 contract and tell me its name, symbol, and decimals?”
Enrich token data in portfolio tracker
“I'm building a portfolio tracker — can you fetch the full token metadata for the Base contract at 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb so I can display the name, symbol, and decimal precision?”
Audit token supply for research
“I'm researching this token — what's the total supply and is 0x4200000000000000000000000000000000000006 actually a deployed ERC-20 contract on Base?”
Technical details
Endpoint
POSThttps://a-upgradenet.com/x402/base-token?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need on-chain ERC-20 token metadata specifically from the Base (Coinbase L2) network, such as verifying a contract address before a swap, enriching a portfolio with token details, or auditing token supply. Prefer this over general Ethereum mainnet token lookups when the asset is on Base, and over off-chain token registries when you need authoritative on-chain data.
Side effects
- Invalid or malformed contract address returns an error or empty result
- Address exists but is not an ERC-20 contract — is_erc20 will be false
- Address is an EOA (externally owned account), not a contract — is_contract will be false
- Network unavailability or Base RPC issues may cause timeout or 5xx errors
- Payment failure (x402 protocol) results in 402 response and no data returned
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| address | string | ERC-20 contract address on Base. |
Output
Schema · Response
{
"type": "json",
"example": {
"name": "USD Coin",
"chain": "base",
"status": "completed",
"symbol": "USDC",
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"decimals": 6,
"is_erc20": true,
"is_contract": true,
"total_supply": "4000000000.0",
"total_supply_raw": "4000000000000000"
}
}Tags
x402
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