# Crypto Wallet Address Validator

> Crypto Wallet Address Validator is a paid API for AI agents from wallet.openverbs.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-14).

Validates a cryptocurrency wallet address, optionally against a specific chain (Ethereum or Bitcoin)

## Facts

- Endpoint: POST https://wallet.openverbs.com/v1/validate
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/crypto-wallet-address-validator-7ee640e8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Rwx09swiQ2TOsei9ekzn0

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-wallet-address-validator-7ee640e8 -d '<json body>'
```

Example prompt: Can you check if this Ethereum wallet address is valid: 0x742d35Cc6634C0532925a3b844Bc454e4438f44e?

## When to prefer this

Use this endpoint when you need a fast, low-cost sanity check on a cryptocurrency wallet address before executing a transfer, storing the address, or displaying it to a user. It is especially useful in payment pipelines, onboarding flows, or any agent workflow where accepting a bad address could result in lost funds. Prefer this over client-side regex checks when you want authoritative, chain-aware validation for Ethereum and Bitcoin addresses.

## Known failure modes

- Invalid or malformed address string returns a failed validation response
- Unsupported chain specified (only ethereum and bitcoin are supported)
- Address too long or too short (maxLength 120, minLength 1) triggers schema validation error
- Network or service errors returning HTTP 402 if payment is not properly handled
- Empty or missing address field returns a schema validation error

## How this service works

Validate a blockchain address. Supply `chain` to check against a specific chain, or omit it to auto-detect. Ethereum addresses report their EIP-55 checksum state; Bitcoin covers base58check (P2PKH/P2SH) and bech32/bech32m segwit (P2WPKH/P2WSH/P2TR). A well-formed but invalid address returns `valid:false` — not an error.

## Output

A validation result indicating whether the provided wallet address is valid, potentially including chain-specific validation details when a chain (ethereum or bitcoin) is specified in the request.

## 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",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object",
     "required": [
      "address"
     ],
     "properties": {
      "chain": {
       "enum": [
        "ethereum",
        "bitcoin"
       ],
       "type": "string",
       "description": "Optional chain to validate against."
      },
      "address": {
       "type": "string",
       "maxLength": 120,
       "minLength": 1,
       "description": "The address to validate."
      }
     },
     "additionalProperties": false
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/crypto-wallet-address-validator-7ee640e8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from wallet.openverbs.com](https://www.zero.xyz/host/wallet.openverbs.com/llms.txt)