# AgentsToolsHub EVM Address Validator

> AgentsToolsHub EVM Address Validator is a paid API for AI agents from agentstoolshub.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-17).

Validates an EVM address with syntactic checks and EIP-55 keccak-256 mixed-case checksum verification, returning the canonical checksummed form or an explicit error on checksum mismatch.

## Facts

- Endpoint: GET https://agentstoolshub.com/api/v1/crypto/address-validate?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-17
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentstoolshub-evm-address-validator-4e00084f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rOaoHyAidtUf5t0lnflT-

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 agentstoolshub-evm-address-validator-4e00084f
```

Example prompt: Can you validate this Ethereum address and give me the proper EIP-55 checksummed version: 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045?

## When to prefer this

Choose this endpoint when you need strict EIP-55 checksum enforcement with no silent correction — it flags broken checksums as errors rather than auto-fixing them, making it ideal for input validation pipelines where a mismatched checksum should block a transaction or alert the user.

## Known failure modes

- Address fails EIP-55 checksum test — returns error rather than silently correcting
- Address is syntactically invalid (wrong length, non-hex characters) — returns validation error
- Missing required 'address' query parameter — returns bad request error
- Network timeout or service unavailability

## How this service works

Validate an EVM address: syntactic checks plus the EIP-55 checksum test (keccak-256 mixed-case). Returns the canonical checksummed form, flags addresses pasted with a broken checksum, and never guesses — an invalid checksum is an error, not a silent fix. Use this when an agent needs to eIP-55 checksum check + canonical form.

## Output

Returns the canonical EIP-55 checksummed Ethereum address if valid, or an explicit error indicating the checksum is broken or the address is syntactically invalid — never silently corrects a bad 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "address"
     ],
     "properties": {
      "address": {
       "type": "string",
       "description": "Address"
      }
     }
    }
   },
   "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/agentstoolshub-evm-address-validator-4e00084f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentstoolshub.com](https://www.zero.xyz/host/agentstoolshub.com/llms.txt)