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Duo Data Utilities – Blockchain Address Chain Identification & Validation
x402
Duo Data Utilities – Blockchain Address Chain Identification & Validation is a paid API for AI agents from api.duoleads.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-02).
Identifies which blockchain network(s) a given crypto address belongs to, validates encoding correctness (checksum, format), and returns the checksummed form with detailed failure reasons.
Price / call$0.05
Success—
StatusUnknown
How this service works
Identify which blockchain an address belongs to and validate its encoding: EVM EIP-55 checksum, Bitcoin base58check and bech32/bech32m with witness version, Solana base58 and on-curve check, Cosmos bech32 with its HRP, Tron, XRP, Litecoin, Dogecoin, Cardano, Polkadot SS58 and Algorand. Returns the detected chains with a confidence note, the checksummed form for EVM addresses, and the exact reason an address failed.
Output
Returns a JSON object with: a boolean 'valid' flag, an array of matched chains each with format, validity, and detail, a checksum object showing the checksummed EVM form and whether EIP-55/EIP-1191 was applied, an ambiguous flag if multiple chains match, and metadata including request ID, timestamp, price, and determinism flag. On failure, includes the exact reason the address encoding is invalid.
Example use cases
Validate user-submitted wallet address
“A user just entered '1A1zP1eP5QGefi2DMPTfTL5SLmv7Divf Na' as their withdrawal address — can you check which chain it's for and whether it's a properly encoded Bitcoin address?”
EIP-55 checksum correction before on-chain transaction
“Before I send this transaction, can you verify that 0xd8da6bf26964af9d7eed9e03e53415d37aa96045 is a valid EVM address and give me the properly checksummed version?”
Identify ambiguous address across chains
“I have this address 'cosmos1qnk2n4nlkpw9xfqntladh74er2ze57dba9hm' — can you confirm it's a valid Cosmos address and tell me its human-readable part?”
Technical details
Endpoint
GEThttps://api.duoleads.com/v1/chain/address?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need deterministic, multi-chain address identification and encoding validation without running a full node — especially useful when an address could belong to multiple chains (EVM vs Tron, Bitcoin vs Litecoin), when you need the canonical EIP-55 checksummed form of an Ethereum address, or when you want the exact reason an address encoding failed. Prefer this over generic regex checks for chains requiring on-curve validation (Solana) or bech32 HRP verification (Cosmos, Bitcoin).
Side effects
- Invalid or malformed address string returns valid=false with a specific reason field explaining the encoding error
- Unsupported address format returns no matches in the matches array
- Providing an expect hint for the wrong chain type results in a failed validation against that specific chain
- EVM chain_id mismatch causes EIP-1191 checksum validation to fail with explanation
- Addresses exceeding 128 characters are rejected by schema validation
- Network or payment errors return HTTP 402 or 5xx responses
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"data": {
"valid": true,
"matches": [
{
"chain": "evm",
"valid": true,
"detail": {},
"format": "hex20",
"reason": "no_checksum"
}
],
"checksum": {
"input_form": "lowercase",
"checksummed": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"checksum_valid": true,
"eip1191_applied": false
},
"ambiguous": false
},
"meta": {
"price_usd": "0.05",
"disclaimer": "Factual output of a deterministic computation over public data. Provided as is, with no warranty of accuracy, completeness or availability. Not investment, financial, legal, tax, medical or any other professional advice, and not a recommendation. Verify before relying on it. Terms: https://api.duoleads.com/terms",
"request_id": "01K6B7Q4ZC8H3F2M9WXR5TYN0D",
"computed_at": "2026-09-28T12:00:00.000Z",
"deterministic": true
},
"route": "/v1/chain/address",
"version": "1.0.0"
}
}Tags
x402
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