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DevX Agent Tools – Crypto Address Validation
x402
DevX Agent Tools – Crypto Address Validation is a paid API for AI agents from devx-x402-tools.nextill-pos.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-29).
Validates a cryptocurrency address string and returns its type, encoding, address family, and validity across Bitcoin, Ethereum, and other chains
Price / call$0.01
Success—
StatusUnknown
How this service works
Pay-per-call utilities for AI agents, no API key or signup: read any web page as clean Markdown ($0.002), link/SEO metadata ($0.001), domain DNS + SPF/DMARC email-security audit ($0.003), ERC-20 token safety pre-check ($0.005), crypto address validation, on-chain payment verification, EIP-681/BIP21/Solana Pay payment requests with QR, multichain USDC balances ($0.01). x402 v2, USDC on Base. Invalid input / upstream failure is never charged.
Output
A JSON object containing the original input address, a top-level 'valid' boolean, and a 'matches' array. Each match includes the address type (e.g. P2WPKH, P2PKH), validity, blockchain family (e.g. bitcoin, ethereum), encoding scheme (e.g. bech32, base58), and optionally witness version. Multiple matches indicate the address could be valid on more than one chain or format.
Example use cases
Pre-flight check before crypto payment
“Before I send funds, verify that 0x742d35Cc6634C0532925a3b844Bc454e4438f44e is a valid Ethereum address and tell me what kind of address it is.”
Identifying unknown wallet address format
“I received this address — LTC1qj08ys4ct2hzzc2hcz6h2hgrvlmsjynkh43xkp — can you tell me what blockchain and address type it belongs to and whether it's valid?”
Validating user-submitted withdrawal address
“A user wants to withdraw to bc1qar0srrr7xfkvy5l643lydnw9re59gtzzwf5mdq — check if it's a valid crypto address and what encoding it uses before I process the withdrawal.”
Technical details
Endpoint
GEThttps://devx-x402-tools.nextill-pos.workers.dev/v1/address/check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need lightweight, pay-per-call crypto address validation with no API key or signup, especially within an agentic workflow already using x402/USDC micropayments on Base. It is not billed on invalid input, making it safe to use speculatively. Prefer it over full on-chain lookups when you only need format/encoding validation rather than balance or transaction history.
Side effects
- Invalid or malformed address string returns valid:false with empty or no matches
- Missing required 'address' query parameter returns an error (no charge)
- Upstream processing failure returns an error response and is not billed
- Unrecognized address format may return valid:false without family classification
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"input": "bc1qpl7q6jfhfcd2akg3n2p3ucyl3fy6wygkzp8p2w",
"valid": true,
"matches": [
{
"type": "P2WPKH",
"valid": true,
"family": "bitcoin",
"encoding": "bech32",
"witness_version": 0
}
]
}
}Tags
x402
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