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ERC20 ABI Encoder
x402
ERC20 ABI Encoder is a paid API for AI agents from chargers-borders-cedar-fig.trycloudflare.com, paid per call via x402, price unknown, status unknown (last checked 2026-09-14).
Encodes ERC-20 token contract method calls into ABI-encoded hex data for use in Ethereum transactions
Price / call—
Success—
StatusUnknown
How this service works
opentools utility endpoint
Output
Returns ABI-encoded hex calldata representing the specified ERC-20 method call, ready to be included as the 'data' field in a raw Ethereum transaction or used with eth_call.
Example use cases
Encode ERC-20 token transfer calldata
“I need to build a raw Ethereum transaction to transfer 500 USDT to 0xDEAD...BEEF — can you encode the ERC-20 transfer(address,uint256) call into hex calldata for me?”
Prepare approve allowance for DeFi protocol
“Encode an ERC-20 approve call granting the Uniswap router at 0x7a25...3F40 an allowance of 1000000000000000000 (1 token in 18-decimal units) so I can build the approval transaction.”
Generate balanceOf calldata for off-chain query
“Give me the ABI-encoded calldata to call balanceOf on an ERC-20 contract for wallet address 0x1234...5678 — I want to send it as an eth_call without a full Web3 library.”
Technical details
Endpoint
POSThttps://chargers-borders-cedar-fig.trycloudflare.com/tools/erc20-encodeWhen to prefer
Use this endpoint when you need to programmatically encode ERC-20 function calls into ABI hex calldata without importing a full Web3 library (ethers.js, web3.py). It is ideal for lightweight agents or serverless environments where installing blockchain SDKs is undesirable, and when constructing raw Ethereum transactions or eth_call payloads for standard ERC-20 methods like transfer, approve, transferFrom, balanceOf, and allowance.
Side effects
- Invalid or missing method name returns an error response
- Incorrect parameter types or count cause encoding failure
- Malformed address (wrong length or non-hex) causes validation error
- Missing required 'type' or 'method' fields in the input object returns 400
- Unsupported ERC-20 method name not in the standard ABI returns an unknown method error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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