API Catalog Blockchain APIs

Blockchain APIs

Web3, wallets & smart contracts

Blockchain and Web3 APIs for wallet verification, NFT validation, and smart contract interaction.

Wallet Verification

Popular

Verify wallet ownership and balances. Confirm wallet addresses and check cryptocurrency holdings.

POST /api/v1/blockchain/wallet/verify
{ "address": "0x742d35Cc6634...",
  "chain": "ethereum" }

// Response
{ "valid": true,
  "balance": "2.5",
  "currency": "ETH",
  "last_activity": "2025-01-15T10:30:00Z" }
Multi-Chain Balance Check Ownership Proof

NFT Validation

Verify NFT ownership and metadata. Confirm token ownership and retrieve NFT details.

POST /api/v1/blockchain/nft/validate
{ "contract": "0xBC4CA0EdA7...",
  "token_id": "1234",
  "owner": "0x742d35Cc6634..." }

// Response
{ "owned": true,
  "name": "Bored Ape #1234",
  "metadata_uri": "ipfs://...",
  "collection": "BAYC" }
ERC-721 ERC-1155 Metadata

Transaction Lookup

Get blockchain transaction details. Retrieve transaction status, confirmations, and transfer data.

GET /api/v1/blockchain/tx/{hash}
?chain=ethereum

// Response
{ "hash": "0xabc123...",
  "status": "confirmed",
  "confirmations": 12,
  "from": "0x742d35Cc...",
  "to": "0xBC4CA0Ed...",
  "value": "1.5 ETH" }
Real-Time Confirmations Gas Details

Smart Contract

Interact with smart contracts. Read contract state and execute contract functions.

POST /api/v1/blockchain/contract/call
{ "contract": "0xBC4CA0EdA7...",
  "method": "balanceOf",
  "params": ["0x742d35Cc..."],
  "chain": "ethereum" }

// Response
{ "result": "5",
  "decoded": { "balance": 5 },
  "gas_used": 21000 }
Read/Write ABI Support Gas Estimation

Token Balances

Get token balances for any wallet. Retrieve all ERC-20 and native token holdings.

GET /api/v1/blockchain/tokens/{address}
?chain=ethereum

// Response
{ "address": "0x742d35Cc...",
  "tokens": [
    { "symbol": "USDC", "balance": "1000",
      "contract": "0xA0b86991..." },
    { "symbol": "LINK", "balance": "50.5",
      "contract": "0x514910..." }
  ] }
ERC-20 Multi-Chain Portfolio

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