# AgentBIT EIP-55 Address Checksum Converter

> AgentBIT EIP-55 Address Checksum Converter is a paid API for AI agents from agentbit.app, paid per call via x402, $0.0015/call, status unknown (last checked 2026-10-14).

Converts an Ethereum address to its EIP-55 mixed-case checksum format

## Facts

- Endpoint: POST https://agentbit.app/v1/address/eip55?utm_source=zero.xyz
- Price: $0.0015/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentbit-eip-55-address-checksum-converter-7ed74ec3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_J5StP_taEL1AgDvtEcEpx

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability agentbit-eip-55-address-checksum-converter-7ed74ec3 -d '<json body>'
```

Example prompt: Can you convert this Ethereum address to its EIP-55 checksummed format: 0xfb6916095ca1df60bb79ce92ce3ea74c37c5d359?

## When to prefer this

Use this endpoint when you need to convert or normalize an Ethereum-compatible address to EIP-55 mixed-case checksum format without requiring a full Ethereum node or library. Ideal for lightweight agents that need address standardization as a pay-per-call primitive with no API key setup.

## Known failure modes

- Invalid address format: input is not a valid 40-character hex string (with or without 0x prefix)
- Malformed input: missing or empty address field returns an error
- Non-Ethereum address formats (e.g. Bitcoin, Solana) are not supported

## How this service works

EIP-55 mixed-case checksum for a 20-byte EVM (Ethereum/Base) hex address, via Keccak-256. Normalize and verify addresses before a transfer.

## Output

Returns the EIP-55 mixed-case checksummed representation of the provided Ethereum address, where uppercase and lowercase hex letters encode a checksum that allows detection of address typos.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "address": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {}
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agentbit-eip-55-address-checksum-converter-7ed74ec3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentbit.app](https://www.zero.xyz/host/agentbit.app/llms.txt)