Best Token Positions APIs: A 2026 Guide

If you're building a wallet, portfolio tracker, or DeFi dashboard, you've already run into this problem. Your users hold tokens across a dozen chains, deposited in protocols you've never heard of. And they expect to see everything the moment they connect the wallet. Fetching that data is what token positions APIs solve.

This guide covers what these APIs do, what to look for, and how the top options compare.

What are token positions APIs?

A token positions API returns structured data about what ERC-20 tokens a wallet address holds on Ethereum, Base, and other major EVM chains. 

Besides raw token balances, tokens APIs return position values at current prices in USD or other currencies. Some also include token logos, links, and other useful metadata. 

Besides ERC-20 token balances, some APIs also include interpreted DeFi protocol positions. Some APIs return deposits in Aave, LP positions in Uniswap, staked assets in Lido, and thousands of other protocol interactions.

Token positions APIs are the backbone of portfolio management tools, DeFi dashboards, tax and reporting products, AI agents with onchain context, and any consumer app that needs to display wallet state.

Key features and functionalities

Not all token positions APIs offer the same depth. 

The features that separate useful APIs from ones that create more work than they save:

• Real-time data retrieval. Position data should update within seconds of new blocks being confirmed. Stale balances erode user trust fast.
• Multichain support. Your users aren't on one chain. The API should aggregate the whole multichain portfolio across all major blockchains without requiring separate calls per chain.
• DeFi protocol coverage. Supporting Aave and Uniswap is table stakes. The real question is whether the API covers Morpho, Pendle, Aerodrome, and the long tail of protocols your users actually interact with.
• Enriched metadata. Token names, symbols, logos, contract addresses, and protocol context should come back in the response without additional lookups.
• USD pricing. Positions need fiat valuations for portfolio views, PnL calculations, and reporting. The API should handle this natively.

Core components of token positions APIs

Under the hood, a good positions API combines several data layers into a single interface.

• Endpoints for balances and positions. A single call should return fungible ERC-20 tokens, NFTs, and DeFi protocol positions for a given wallet address. The best APIs normalize this into a consistent schema across chains.
• Metadata and pricing. Every token in the response should include current pricing, historical charts, and descriptive metadata. Without this, you're making additional calls to patch together a complete picture.
• Scalability. Consumer applications generate unpredictable traffic. The API needs to handle production-scale request volumes without degraded response times. Sub-second latency for portfolio queries is the benchmark for wallet-grade products.

Authentication and authorization

Token positions APIs use standard authentication patterns. 

Most require an API key passed as a bearer token or through HTTP Basic Auth. Keys are typically generated through a self-service developer portal.

Rate limits vary by provider and plan. 

Free tiers work for prototyping. Production deployments need higher limits. Look for providers that scale to 1,000+ RPS for enterprise use cases. Security measures like rate limiting and key rotation protect both the provider and your application.

Best token positions APIs

Zerion API

Zerion API grew out of the data infrastructure behind Zerion Wallet, which serves hundreds of thousands of monthly active users across EVM chains and Solana. 

That same data layer now powers products at OpenSea, Uniswap Wallet, Kraken Wallet, Privy, Coinbase, and many others.

The core strength is that by default, Zerion API fetches all tokens across all chains. But it also offers built-in filters for spam to avoid loading useless tokens.

Other things that make it different:

• Besides ERC-20 token positions, it covers interpreted DeFi positions (LPs, staked, rewards, etc) across 8,000+ protocols on 38+ chains. 
• Zerion API also includes transaction history, PnL calculations, NFTs, and historical balance charts.
• Performance is built for consumer-grade products: sub-second response times, 1,000+ RPS for enterprise clients, and 99.9% uptime. 
• EVM and Solana data come through a unified schema, so you don't manage separate integrations.

Getting started takes minutes. Free developer keys provide 2,000 requests per month, enough to build and test a proof of concept. Create free Zerion API keys to start querying.

Alchemy Token API

Alchemy's strength is broad chain coverage, backed by the same infrastructure that powers its RPC services. The API handles raw token balances, NFTs, and transaction history reliably.

The gap: You need to make separate calls for each chain and often need to enrich raw positions with other data. There is also no DeFi position tracking. If a user has assets deposited in Aave, the API shows the receipt tokens without interpretation. Teams building DeFi-aware products need to decode positions themselves.

Moralis EVM API

Moralis offers token balances and DeFi position tracking across major EVM protocols, including Aave, Uniswap, Lido, and EigenLayer. The developer experience (SDKs, templates, documentation) is designed for fast prototyping.

The limitation: DeFi positions are limited. The API architecture also requires per-chain queries, meaning a portfolio view across 10 chains needs 10 separate calls.

How to choose an API for your use case

The right API depends on what you're building and how you plan to use the data.

Alchemy or Moralis for custom data analytics. If you're building your own interpretation layer and want raw blockchain data as building blocks, these APIs give you broad coverage and flexibility. 

Zerion API for consumer apps and enterprise use cases. If your product needs to display complete portfolio views across EVM and Solana, Zerion API handles the hard parts out of the box. The interpreted data layer means less engineering overhead, faster time to market, and fewer coverage gaps. It works great for both consumer apps and enterprise use cases. 

Create free Zerion API keys and start building with interpreted token positions data.