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SYNTHORA ERC-20 Token Balance Lookup
x402
SYNTHORA ERC-20 Token Balance Lookup is a paid API for AI agents from rpc-erc20-balance.hergertsynthora.com, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-15).
Fetches the ERC-20 token balance of a given wallet address on a specified chain using the standard balanceOf call, returning a deterministic Ed25519-signed result.
Price / call$0.1
Success—
StatusUnknown
How this service works
ERC-20 token balance for a holder via balanceOf. Deterministic, Ed25519-signed.
Output
Returns the ERC-20 token balance for the specified holder address on the given chain, deterministically computed from on-chain balanceOf, and signed with Ed25519 for verifiability.
Example use cases
Example prompt
“What's the current USDC balance of wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Base — I need the signed result I can verify cryptographically.”
Technical details
Endpoint
POSThttps://rpc-erc20-balance.hergertsynthora.com/serviceWhen to prefer
Choose this endpoint when you need a cryptographically signed (Ed25519), verifiable ERC-20 token balance that can be audited or passed to downstream verification logic. Prefer it over raw RPC calls when you want a trustless, signed attestation of a balance rather than a raw unsigned JSON-RPC response. Well-suited for agents operating on Base or other EVM chains needing low-cost ($0.003 USDC) on-chain balance lookups with payment via x402 protocol.
Side effects
- Invalid or malformed wallet address returns an error response
- Unsupported chain identifier causes lookup failure
- Token contract address not found or not a valid ERC-20 results in error
- Upstream RPC node failure — no charge applied per service policy
- Missing required fields (chain, token, address) causes validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| chain | string | chain |
| tokenrequired | string | token |
| addressrequired | string | address |
Tags
x402
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