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Multi-Chain Wallet Portfolio & Transaction History
x402
Multi-Chain Wallet Portfolio & Transaction History is a paid API for AI agents from x402-gateway.blackwoodstate8.workers.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-19).
Returns native and major-token balances plus recent transfer history for a wallet address on Ethereum, Base, and/or Solana
Price / call$0.003
Success—
StatusUnknown
How this service works
Use when you need a multi-chain wallet balance, a wallet portfolio or wallet transaction history on Ethereum, Base or Solana. Do not use for uSD values, NFTs, DeFi positions, long-tail tokens or chains beyond Ethereum, Base and Solana. Returns JSON with a multi-chain wallet balance and transaction history: native and major-token balances on Ethereum, Base or Solana plus the latest transfers, without airdrop spam for 0.005 USDC per call. Typical response time 3000 ms (p95). Category: Data.
Output
A JSON object keyed by chain (ethereum, base, solana) each containing: native token symbol and balance, an array of major token balances (symbol, contract, decimals, balance), and a history array of recent transfers (hash, timestamp, direction in/out, counterparty address, asset, amount). Also includes the queried address and an updatedAt timestamp. Airdrop spam is filtered out.
Example use cases
Cross-chain portfolio snapshot for a user
“What are the ETH, USDC, and other token balances for wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 across Ethereum and Base?”
Recent transfer audit for a Solana wallet
“Show me the last 5 transactions for Solana address 7xKXtg2CW87d97TXJSDpbD5jBkheTqA83TZRuJosgHkV — I want to see what moved in or out recently.”
Agent onboarding wallet check
“Before we proceed, can you check if wallet 0xAb5801a7D398351b8bE11C439e05C5B3259aeC9B has any ETH or USDC balance on Base, and show me its last 3 transfers?”
Technical details
Endpoint
POSThttps://x402-gateway.blackwoodstate8.workers.dev/v1/wallet-portfolio?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need multi-chain native and major-token balances and recent transfer history for a specific wallet on Ethereum, Base, or Solana. Prefer this over general blockchain explorers when you want a clean, spam-filtered JSON response ready for agent consumption. Do not use for USD valuations, NFT holdings, DeFi positions (liquidity, staking), long-tail or obscure token balances, or chains beyond Ethereum, Base, and Solana.
Side effects
- Invalid or malformed wallet address returns an error
- Requesting a chain incompatible with the address format (e.g. Solana chain for an 0x address) may return empty or error
- historyLimit out of range (>25 or <0) returns a validation error
- Network timeouts may occur given ~3000ms p95 latency
- Missing required 'address' field returns a schema validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"base": {
"native": {
"symbol": "ETH",
"balance": "0"
},
"tokens": [
{
"symbol": "USDC",
"balance": "0.015",
"contract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"decimals": 6
}
],
"history": [
{
"hash": "0xeca4b84c7be1b01b92314dd139ba623f4065ea2d9af702cdca1a6e006fc92f09",
"time": "2026-10-17T23:55:53.000Z",
"asset": "USDC",
"amount": "0.005",
"direction": "in",
"counterparty": "0x87db3c25d1e8e40f8ef240d48a711b0c355cf8cf"
},
{
"hash": "0x618c2559d32eef4fa33af283a53db6e96dacd049c22a586a8dc4bc3a603326e4",
"time": "2026-10-17T23:54:41.000Z",
"asset": "USDC",
"amount": "0.005",
"direction": "in",
"counterparty": "0x87db3c25d1e8e40f8ef240d48a711b0c355cf8cf"
}
]
},
"note": "Balances of the native coin and major tokens of each chain (a fixed list; airdrop spam and long-tail tokens are left out). History: the latest native and major-token transfers in and out; on Solana, the net change per transaction. Amounts are decimal strings in token units, without USD values.",
"solana": null,
"address": "0xFf918CFB0690FdEd4224DBDab916F6E6F78882b7",
"ethereum": null,
"updatedAt": "2026-10-18T02:46:08.863Z"
}
}Tags
x402
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