# 24K Labs Crypto Address Validator

> 24K Labs Crypto Address Validator is a paid API for AI agents from api.24klabs.ai, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-13).

Validates a cryptocurrency address for correctness, checksum validity, and chain type (e.g. EVM)

## Facts

- Endpoint: POST https://api.24klabs.ai/api/crypto-address-validate
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/24k-labs-crypto-address-validator-8a90e4b2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1BPYAL5iiCrOrZlUvGTND

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 24k-labs-crypto-address-validator-8a90e4b2 -d '<json body>'
```

Example prompt: Can you check if this wallet address is valid and has a correct checksum: 0x742d35Cc6634C0532925a3b844Bc454e4438f44e?

## When to prefer this

Choose this endpoint when you need a fast, cheap ($0.003 USDC) programmatic check of a crypto address's format and checksum validity before executing a transaction or storing an address — especially for EVM-compatible chains. Prefer it over manual regex checks or on-chain lookups when you only need structural/format validation without a live blockchain query.

## Known failure modes

- Malformed or empty address input returns valid: false
- Non-EVM chain addresses may return unsupported chain type or invalid
- Network timeout results in no response
- Invalid JSON body causes 4xx error

## How this service works

A curated directory of x402 services — each one on the list on purpose, with the health, uptime, and independent trust grades from across the ecosystem gathered in one place.

## Output

Returns a JSON object indicating the detected chain (e.g. 'evm'), whether the address is syntactically valid (valid: true/false), and whether the checksum is correct (checksum_valid: true/false).

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "chain": "evm",
  "valid": true,
  "checksum_valid": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/24k-labs-crypto-address-validator-8a90e4b2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.24klabs.ai](https://www.zero.xyz/host/api.24klabs.ai/llms.txt)