# Avasis Multi-Balance on Base > Avasis Multi-Balance on Base is a paid API for AI agents from agents.avasis.ai, paid per call via x402, $0.02/call, status unknown (last checked 2026-11-02). Returns ETH, USDC, and up to 10 ERC-20 token balances with USD valuations, gas affordability, and wallet metadata for any Base (chain 8453) address in a single batched read. ## Facts - Endpoint: GET https://agents.avasis.ai/v1/base/multi-balance?utm_source=zero.xyz - Price: $0.02/call - Payment: x402 - Status: unknown - Last checked: 2026-11-02 - Activations on Zero: 0 - Tags: x402 - Canonical page: https://www.zero.xyz/c/avasis-multi-balance-on-base-9bff260d - Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_twyaEm191HdTtDaEzGSS_ 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 avasis-multi-balance-on-base-9bff260d ``` Example prompt: What's the full balance of wallet 0xf977814e90da44bfa03b6295a0616a897441acec on Base — give me ETH, USDC, WETH, and cbBTC with USD values and tell me if it can afford a transfer. ## When to prefer this Choose this endpoint when you need a comprehensive, single-call snapshot of a Base chain wallet including multi-token balances with live USD pricing, gas affordability analysis, and wallet metadata — especially when you want to avoid multiple separate RPC calls. It is optimized for Base (chain 8453) only; use sibling endpoints for Ethereum mainnet or Solana. Prefer it over raw RPC calls when you also need USD valuation, Chainlink price feeds, and contract/EOA detection in one response. ## Known failure modes - RPC node down — returns HTTP 502, no charge applied - Invalid or non-checksummed address — validation error returned - Token not recognized or unsupported symbol — per-token error field populated, other tokens still returned (fail-soft) - More than 10 extra tokens requested — excess silently truncated - Network error to price feed (Chainlink/Dexscreener) — affected token USD value may be null, rest succeed ## How this service works Wallet multi-balance on Base (chain 8453, $0.02): address -> ETH + USDC + up to 10 ERC-20s (addresses or symbols: USDC, USDBC, DAI, WETH, CBBTC, USDT) in ONE batched read: raw + units, USD per asset and total (Chainlink, pegs, Dexscreener), tx_count, is_contract, empty flag, gas affordability (ETH transfer cost at 2x base fee, can_pay_eth_transfer). Phrases: wallet balance, multi balance, usdc balance, eth balance. GET or POST JSON. Per-token fail-soft; RPC down 502, never charged. ## Output Returns a JSON object with ETH balance (raw wei, human-readable amount, USD value via Chainlink), a dedicated USDC entry, an array of up to 10 ERC-20 token objects each containing symbol, amount, decimals, USD price and price source, a totals object with aggregate USD value, a gas object showing current base fee and how many ETH transfers the wallet can afford, plus tx_count, is_contract, empty flag, block number, and a human-readable headline string. ## Request schema (JSON Schema) ```json { "type": "object", "$schema": "https://json-schema.org/draft/2020-12/schema", "required": [ "input" ], "properties": { "input": { "type": "object", "required": [ "type", "method" ], "properties": { "type": { "type": "string", "const": "http" }, "method": { "enum": [ "GET" ], "type": "string" }, "queryParams": { "type": "object", "required": [ "address" ], "properties": { "chain": { "type": "string", "description": "optional; must be base / 8453 on this route" }, "tokens": { "type": "string", "description": "optional comma-separated ERC-20 addresses or known symbols (USDC, USDBC, DAI, WETH, CBBTC, USDT), up to 10; USDC is always included" }, "address": { "type": "string", "description": "the wallet or contract to read (0x + 40 hex)" } }, "additionalProperties": false } }, "additionalProperties": false }, "output": { "type": "object", "required": [ "type" ], "properties": { "type": { "type": "string" }, "example": { "type": "object", "required": [ "chain", "address", "eth", "usdc", "tokens", "totals", "gas", "headline" ], "properties": { "eth": { "type": "object" }, "gas": { "type": "object" }, "kind": { "type": "string" }, "rail": { "type": "string" }, "usdc": { "type": "object" }, "chain": { "type": "string" }, "empty": { "type": "boolean" }, "tokens": { "type": "array" }, "totals": { "type": "object" }, "address": { "type": "string" }, "chain_id": { "type": "integer" }, "headline": { "type": "string" }, "tx_count": { "type": [ "integer", "null" ] }, "is_contract": { "type": [ "boolean", "null" ] }, "block_number": { "type": "integer" }, "also_available": { "type": "object" } } } } } } } ``` ## Response schema (JSON Schema) ```json { "type": "json", "example": { "eth": { "usd": 94.43, "wei": "42100000000000000", "price": 2242.9, "amount": "0.0421", "price_source": "chainlink ETH/USD (latestRoundData)" }, "gas": { "note": "21000 gas at 2x the current base fee + 0.001 gwei tip; excludes the Base L1 data fee (~$0.0003-0.001 per tx); contract calls cost more: /v1/evm/gas-ops prices them", "base_fee_gwei": 0.005, "can_pay_eth_transfer": true, "eth_transfer_cost_eth": "0.000000231", "eth_transfer_cost_usd": 0.0005181, "eth_transfer_cost_wei": "231000000000", "eth_transfers_affordable": 182251 }, "kind": "multi-balance", "rail": "evm-rails-1", "usdc": { "usd": 15115.05, "error": null, "amount": "15115.05", "address": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913" }, "chain": "base", "empty": false, "reads": { "rpc": "fixture", "calls": 8, "elapsed_ms": 0 }, "tokens": [ { "raw": "15115050000", "usd": 15115.05, "error": null, "known": "USDC (Circle)", "price": 1, "amount": "15115.05", "symbol": "USDC", "address": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913", "decimals": 6, "price_source": "stablecoin peg (known issuer)" }, { "raw": "250000000000000000", "usd": 560.73, "error": null, "known": "WETH (canonical)", "price": 2242.9, "amount": "0.25", "symbol": "WETH", "address": "0x4200000000000000000000000000000000000006", "decimals": 18, "price_source": "chainlink ETH/USD (latestRoundData)" }, { "raw": "120000", "usd": 131.85, "error": null, "known": "cbBTC (Coinbase)", "price": 109876.5, "amount": "0.0012", "symbol": "cbBTC", "address": "0xcbb7c0000ab88b473b1f5afd9ef808440eed33bf", "decimals": 8, "price_source": "dexscreener aerodrome (liquidity $12,345,678)" } ], "totals": { "usd": 15902.06, "note": "ETH + priced tokens at current prices", "complete": true, "unpriced": [] }, "address": "0xf977814e90da44bfa03b6295a0616a897441acec", "chain_id": 8453, "headline": "0xf977…acec on Base: 0.0421 ETH ($94.43), 15,115.05 USDC, 0.25 WETH, 0.0012 cbBTC; total $15,902.06; gas for 182251 ETH transfers", "tx_count": 499417, "is_contract": false, "block_number": 53354727, "block_timestamp": 1793498801 } } ``` ## More - Live health (JSON, refreshed every minute): https://www.zero.xyz/c/avasis-multi-balance-on-base-9bff260d/health.json - [Zero catalog index](https://www.zero.xyz/llms.txt) - [Other services from agents.avasis.ai](https://www.zero.xyz/host/agents.avasis.ai/llms.txt)