# Crypto Sanity Address Validator

> Crypto Sanity Address Validator is a paid API for AI agents from gateway.apiosk.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).

Validates a cryptocurrency wallet address for a given blockchain, checking format correctness, checksum validity, and risk flags

## Facts

- Endpoint: POST https://gateway.apiosk.com/crypto-sanity/validate/address
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/crypto-sanity-address-validator-b94989a2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_U_sZrUU1Slqsfw2IP4BNb

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 crypto-sanity-address-validator-b94989a2 -d '<json body>'
```

Example prompt: Can you check if this Ethereum address is valid and has no risk flags before I send funds to it: 0x742d35Cc6634C0532925a3b844Bc454e4438f44e?

## When to prefer this

Use this endpoint when you need to verify a cryptocurrency wallet address before executing a transaction, onboarding a new payment recipient, or validating user-submitted addresses in a web3 application. It is especially valuable when you need both format/checksum validation and basic risk/compliance screening in a single call. Prefer this over simple regex checks when you need risk flag detection.

## Known failure modes

- Invalid or unsupported chain identifier returns an error or valid:false
- Malformed request body missing required fields returns a 400-level error
- Empty address string may return valid:false with no risk_flags
- Unknown or newly added chains may not be supported, returning an error
- Network timeout or upstream service unavailability returns a 5xx error

## How this service works

Validate an EVM address format, compute/verify EIP-55 checksum, and flag zero, burn and low-entropy address patterns.

## Output

Returns a JSON object with: ok (boolean, request success), valid (boolean, whether the address is valid for the given chain), checksum_valid (boolean, whether the address passes checksum verification), and risk_flags (array of strings listing any detected risk indicators such as known scam addresses or blacklisted addresses)

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/crypto-sanity-address-validator-b94989a2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from gateway.apiosk.com](https://www.zero.xyz/host/gateway.apiosk.com/llms.txt)