# Alchemy Portfolio API — Multi-Chain Token Balances by Address

> Alchemy Portfolio API — Multi-Chain Token Balances by Address is a paid API for AI agents from x402.alchemy.com, paid per call via x402, $0.001000/call, status unknown (last checked 2026-10-11).

Returns multi-chain ERC-20 and native token balances with metadata for one or more wallet addresses across supported blockchains.

## Facts

- Endpoint: POST https://x402.alchemy.com/data/v1/assets/tokens/by-address?utm_source=zero.xyz
- Price: $0.001000/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/alchemy-d5de67d5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Jv68ZxGePa-p85UBOiUm_

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 alchemy-d5de67d5 -d '<json body>'
```

Example prompt: What tokens does wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 currently hold across all chains — show me the balances and token symbols.

## When to prefer this

Use this endpoint when you need a unified, multi-chain view of fungible token holdings for one or more wallet addresses without specifying a particular chain. Prefer this over chain-specific RPC balance calls when you need cross-chain aggregation in a single request, or when you need token metadata (symbol, decimals, name) alongside raw balances. It is especially useful for portfolio dashboards, wallet analytics, and DeFi position summarization.

## Known failure modes

- Invalid or malformed wallet address returns a 400 error
- Unsupported chain silently omitted or returns empty results
- Payment not accepted or insufficient USDC balance causes 402 response
- Rate limiting or quota exceeded returns 429
- Wallet with no token balances returns empty array
- Network timeout on slow chains returns partial results

## How this service works

Portfolio API — multi-chain token balances and metadata for one or more wallet addresses (not chain-specific).

## Output

A list of token holdings per wallet address, each entry including token name, symbol, contract address, chain, raw balance, decimals, and optionally USD-denominated value, aggregated across all supported EVM and non-EVM chains.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/alchemy-d5de67d5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.alchemy.com](https://www.zero.xyz/host/x402.alchemy.com/llms.txt)