# Swift Bot Labs EVM Address Validator

> Swift Bot Labs EVM Address Validator is a paid API for AI agents from x402-toolbox.swiftbotlab.workers.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-31).

Validates an Ethereum/EVM address and returns its canonical lowercase, ERC-55 checksummed form, zero-address flag, and whether it already had a valid checksum.

## Facts

- Endpoint: GET https://x402-toolbox.swiftbotlab.workers.dev/v1/evm/address?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/swift-bot-labs-evm-address-validator-efb8c40b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_eUGg_TH842G0ojBslfb_A

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 swift-bot-labs-evm-address-validator-efb8c40b
```

Example prompt: Can you validate this Ethereum address and give me the properly checksummed version: 0x2481e29895b43e87e547a50fb0bb5aa1e70585eb?

## When to prefer this

Choose this endpoint when you need a lightweight, pay-per-call, no-signup EVM address validator that also normalizes to ERC-55 checksum format in a single call. Ideal for agents that only occasionally need address validation and don't want to maintain API keys or subscriptions. Prefer over on-chain or web3.js validation when a pure HTTP utility call is simpler in context.

## Known failure modes

- Missing required 'address' query parameter returns an error response
- Non-hex or completely malformed input may return valid:false rather than an error
- Payment failure via x402 protocol blocks the call entirely before address processing
- Network/worker timeout for edge cases

## How this service works

62 small, deterministic utility APIs (DNS and e-mail checks, web extraction, EVM decoding, x402 checks, IP math, JSON/CSV, hashing, conversions). No account or API key: pay per call in USDC with x402.

## Output

A JSON object with: ok (boolean), tool name, and a result object containing valid (boolean), isZero (boolean), lowercase (all-lowercase address string), checksummed (ERC-55 mixed-case checksum address string), and hadChecksum (boolean indicating if the input already carried a valid checksum).

## 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"
     ],
     "type": "string"
    },
    "headers": {
     "type": "object",
     "additionalProperties": {
      "type": "string"
     }
    },
    "queryParams": {
     "type": "object",
     "required": [
      "address"
     ],
     "properties": {
      "address": {
       "type": "string"
      }
     },
     "additionalProperties": false
    },
    "discoverable": {
     "type": "boolean"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "tool": "evm-address",
  "result": {
   "valid": true,
   "isZero": false,
   "lowercase": "0x2481e29895b43e87e547a50fb0bb5aa1e70585eb",
   "checksummed": "0x2481E29895b43e87e547a50fB0BB5aa1E70585EB",
   "hadChecksum": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/swift-bot-labs-evm-address-validator-efb8c40b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-toolbox.swiftbotlab.workers.dev](https://www.zero.xyz/host/x402-toolbox.swiftbotlab.workers.dev/llms.txt)