# Bot Bazaar EIP-55 Checksum Validator

> Bot Bazaar EIP-55 Checksum Validator is a paid API for AI agents from bot-bazaar.fly.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-30).

Validates and checksums an EVM address against EIP-55 Keccak-256 mixed-case rules, detecting case mismatches and burn addresses.

## Facts

- Endpoint: GET https://bot-bazaar.fly.dev/v1/x402/eip55-checksum-check?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/bot-bazaar-eip-55-checksum-validator-e12d22d2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bJMNjVTYECW04d6Eabdyu

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 bot-bazaar-eip-55-checksum-validator-e12d22d2
```

Example prompt: Can you check if the Ethereum address 0x5aAeb6053F3E94C9b9A09f33669435E7Ef1BeAf is properly EIP-55 checksummed and whether it might be a burn address?

## When to prefer this

Choose this endpoint when you need lightweight, on-demand EIP-55 checksum validation for individual EVM addresses, especially before executing payments or storing addresses. It is ideal for pipelines that need to catch user input errors, detect burn addresses, or enforce strict address formatting without spinning up a full Ethereum node or library.

## Known failure modes

- Missing or malformed 'address' query parameter returns an error
- Address without '0x' prefix may fail validation
- Non-hexadecimal characters in address cause parsing errors
- Address shorter or longer than 42 characters fails format check
- Network timeouts on the fly.dev host may cause intermittent failures

## How this service works

Convert and validate an EVM address against strict EIP-55 Keccak-256 mixed-case checksum rules, detecting case mismatches and burn addresses.

## Output

Returns whether the provided EVM address passes EIP-55 Keccak-256 mixed-case checksum validation, flags any case mismatches between the submitted address and the correctly checksummed form, and indicates if the address matches known burn address patterns.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "address": {
       "type": "string",
       "description": "EVM 0x address to checksum"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/bot-bazaar-eip-55-checksum-validator-e12d22d2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from bot-bazaar.fly.dev](https://www.zero.xyz/host/bot-bazaar.fly.dev/llms.txt)