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basefeed ERC-20 Token Metadata
x402
basefeed ERC-20 Token Metadata is a paid API for AI agents from api.basefeed.io, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).
Fetches on-chain ERC-20 token metadata (name, symbol, decimals, etc.) for one or more token addresses on Base or Base Sepolia, paid per call in USDC via x402.
Price / call$0.02
Success—
StatusUnknown
How this service works
Batch ERC-20 metadata (2-10 addresses)
Output
A JSON object with ok (boolean), count (integer number of tokens returned), and a tokens array containing metadata for each queried address — typically including name, symbol, decimals, and contract address for each ERC-20 token on the specified chain.
Example use cases
Identify unknown token by contract
“I found this contract address on Base — 0x940181a94A35A4569E4529A3CDfB74e38FD98631 — can you tell me what token it is, its symbol, and how many decimals it uses?”
Enrich DeFi portfolio with token metadata
“I have a list of ERC-20 addresses in my Base wallet — 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913, 0x4200000000000000000000000000000000000006, and 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb — can you fetch the name and symbol for each so I can label them properly?”
Validate token on Base Sepolia testnet
“On Base Sepolia testnet, can you pull the metadata for contract address 0x036CbD53842c5426634e7929541eC2318f3dCF7e so I can confirm it matches the token I deployed?”
Technical details
Endpoint
GEThttps://api.basefeed.io/v1/meta/tokensWhen to prefer
Choose this endpoint when you need on-chain ERC-20 token metadata (name, symbol, decimals) for specific contract addresses on Base mainnet or Base Sepolia, without needing a signup or API key. It is ideal for lightweight, pay-per-call lookups — particularly useful for agents enriching wallet data, validating tokens, or labeling DeFi positions. Prefer it over general-purpose blockchain RPC calls when you want a simple REST interface rather than raw JSON-RPC, and over other metadata APIs when you want to pay only for what you use via USDC on Base.
Side effects
- Invalid or malformed contract address returns error or empty token entry
- Address not corresponding to an ERC-20 token returns empty or null metadata
- Missing required 'addresses' query parameter returns validation error
- Payment failure via x402 (insufficient USDC balance) returns 402 Payment Required
- Unsupported chain value returns validation error
- Rate limiting or node downtime may return 5xx errors
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"count": 2,
"tokens": []
}
}Tags
x402
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