# EVM Address EIP-55 Checksum Converter

> EVM Address EIP-55 Checksum Converter is a paid API for AI agents from agentresolver.vercel.app, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-18).

Converts a raw EVM address to its EIP-55 checksummed form and returns both lowercase and checksummed variants

## Facts

- Endpoint: POST https://agentresolver.vercel.app/api/evm-address-checksum
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/evm-address-eip-55-checksum-converter-052f04f0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_IXofWyaujwqw8y1y0KwFS

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 evm-address-eip-55-checksum-converter-052f04f0 -d '<json body>'
```

Example prompt: Can you convert this Ethereum address to its EIP-55 checksummed format: 0xd8da6bf26964af9d7eed9e03e53415d37aa96045?

## When to prefer this

Use this endpoint when you need a fast, deterministic EIP-55 checksum conversion for a single Ethereum/EVM address, especially in agentic pipelines where you need a structured response with both checksummed and lowercase variants. Prefer this over rolling your own checksum logic when you want a reliable, API-based transformation with a clear schema.

## Known failure modes

- Invalid or malformed address string returns an error — address must be a valid 42-character hex string starting with 0x
- Non-EVM addresses (e.g. Bitcoin, Solana) are not supported and will be rejected
- Missing required 'address' field in request body causes a validation error
- Payment failure or insufficient USDC balance prevents execution (x402 payment required)

## How this service works

Verify an x402 endpoint before paying: live payTo, USDC quote, network, asset, resource binding, TLS and endpoint safety for $0.001 on Base or Solana.

## Output

Returns an object containing the original input address, the EIP-55 checksummed address with mixed-case hex characters, and the fully lowercase version, along with a boolean confirming EIP-55 compliance.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "address": {
   "type": "string",
   "pattern": "^0x[0-9a-fA-F]{40}$"
  }
 }
}
```

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/evm-address-eip-55-checksum-converter-052f04f0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentresolver.vercel.app](https://www.zero.xyz/host/agentresolver.vercel.app/llms.txt)