Best Multichain Portfolio APIs (2026 Guide)

Multichain portfolios are now the norm. Your users hold tokens on Ethereum, NFTs on Base, and DeFi positions scattered across Arbitrum, Polygon, and Solana. Building a portfolio tracker or wallet that surfaces all this data means running indexers for every chain. Or you can just get the right API.

This guide compares the leading multichain portfolio APIs and examines what separates a good solution from one that leaves you patching coverage gaps for months.

What makes a multichain portfolio API

A multichain portfolio API aggregates wallet data across blockchain networks into a single interface. 

At a minimum, these APIs provide token balances, NFTs, and transaction history. More advanced APIs go further. They also track DeFi protocol positions, calculate portfolio valuations, and normalize data across chains so you don't have to.

The core features to evaluate:

• Token balances with real-time pricing across supported chains
• Transaction history with decoded operations
• NFT data including metadata and collection information
• DeFi position tracking for lending, staking, and LP positions
• Chain coverage for EVM networks and beyond (Solana)
• Data normalization through a unified schema across chains

DeFi position tracking is where most multichain APIs fall short. Returning a raw token balance is straightforward. Interpreting that balance as "deposited in Aave" or "staked in Lido" requires protocol-level indexing that many providers skip entirely.

The multichain API landscape

In 2026, you have lots of options to choose from. 

Alchemy

Alchemy built its reputation on reliable RPC infrastructure, and their Portfolio API extends that foundation. The API delivers token balances, NFTs, and transaction history across 70+ chains including Solana. However, fetching portfolios on each chain typically requires separate API calls.

The limitation: no DeFi position tracking. Alchemy returns raw balances, not protocol-specific positions. If a user has assets deposited in Aave or liquidity in Uniswap, the API wouldn’t show that. Teams building DeFi dashboards will need to decode contract states themselves or look elsewhere. Depending on the use case, this can be an advantage. For example, if you want to build features that don’t just show positions but let users manage them directly from your app. 

Pricing scales through Compute Units with a generous free tier (30M CUs/month). 

Moralis

Moralis offers comprehensive wallet data across 19 EVM chains and Solana. However, fetching wallet token positions requires on each chain requires a separate call.

Moralis also has a notable strength: DeFi position tracking on EVM chains. The API identifies deposits in Aave, liquidity in Uniswap V2/V3, staking in Lido and EigenLayer, and positions across other major protocols. Again, each chain needs to be queried separately. DeFi positions are also separate from regular token positions, which means more calls and additional costs.

Pricing starts at $49/month for production use, scaling to $199/month for Pro tier with 100M compute units. Enterprise tiers offer custom limits and priority support.

Dune SIM API

Dune's SIM API is rooted in its analytics product, offering low-latency access to normalized blockchain data, with and without interpretation. 

SIM provides token balances, decoded transactions, and activity feeds across 50+ chains. It's also multichain by default, and one call can fetch positions from multiple chains. However, it currently doesn’t offer DeFi positions. 

Dune works well for developers comfortable building custom data pipelines. For teams wanting turnkey portfolio views, the integration effort increases.

GoldRush (Covalent)

GoldRush offers the widest chain coverage of over 100 networks, including with token balances, NFTs, and decoded transactions. However, you need to query each chain separately.

The gap: no comprehensive DeFi position tracking beyond DEX data. Lending positions, staking, and yield farming aren't surfaced as distinct portfolio items.

Pricing starts with a limited free tier (100K credits/month, 5 req/s). Premium plans begin at $50/month with higher limits available through QuickNode marketplace.

Zerion API: The complete solution

Zerion API was built specifically for multichain portfolio tracking. The same data that is available in Zerion;s portfolio tracking app and Zerion Wallet is also available via Zerion API.

A single API call returns token balances, NFT positions, and DeFi protocol positions across all supported chains EVM chains. In Zerion's API for Solana also follows the same schema, although of course the address is different. This is all done without separate integrations or custom position decoding.

• DeFi positions coverage spans 8,000+ protocols. The API interprets positions across lending platforms, DEXs, yield aggregators, staking contracts, and more. Users see "Deposited in Aave" and "LP position in Uniswap V3" rather than opaque token balances.
• EVM and Solana through one interface. The unified schema normalizes data across chains so your application code doesn't need chain-specific handling. Position types (wallet, deposited, borrowed, locked, staked) remain consistent whether the asset sits on Ethereum or Solana.
• Enterprise-proven scale. For example, OpenSea shipped token trading 3 months faster using Zerion API's comprehensive token data. Bungee eliminated coverage blind spots and reduced load times while scaling from 150 to 2,000+ requests per second.

A minimal integration looks like this:

curl -X GET "https://api.zerion.io/v1/wallets/0x.../positions/?currency=usd" \
  -H "Authorization: Basic YOUR_API_KEY"

The response includes fungible tokens, NFTs, and DeFi positions with USD valuations—everything needed to render a complete portfolio view.

Choosing the right API

The right choice depends on what you're building:

For consumer wallets and portfolio dashboards where users expect to see their full DeFi exposure, Zerion API provides the deepest position tracking. Zerion's advantage lies in unified EVM + Solana coverage and proven enterprise scale.

For basic balance displays without DeFi context, Alchemy and GoldRush offer broad chain coverage with simpler data models.

For custom analytics platforms where you prefer building interpretation logic yourself, Dune SIM provides low-latency primitives based on Dune's SQL analytics.

Most teams building portfolio features discover the DeFi position gap after integration begins. Raw balances render fine, then users ask why their Aave deposits don't appear. Starting with an API that solves this problem saves months of backtracking.

Getting started

Zerion API is available with free API keys for development. The documentation covers endpoints for wallets, positions, transactions, and portfolio analytics.

Create free Zerion API keys to test multichain portfolio queries against real wallet data.