WRITTEN BY
Crypto copywriter
Wallet data sits underneath almost every onchain product. Portfolio trackers, tax tools, DeFi dashboards, and AI agents all depend on it. They need to read what an address holds and what it has done.
Building that layer yourself is hard. You run nodes for each chain. You index blocks. You parse smart contract events. You handle reorgs and token metadata. Months pass before you ship a single user-facing feature.
A crypto wallet data API removes that work. You query an address. You get balances, transactions, and positions back as clean JSON. This guide compares the providers worth knowing in 2026.
What Is a Crypto Wallet Data API?
A crypto wallet data API exposes blockchain wallet data over HTTP. You pass an address. You get structured data in return.
The output mirrors what a wallet shows on screen. Token balances. Transaction history. DeFi positions. Profit and loss. NFT holdings where supported. None of it requires your own node infrastructure.
This matters because raw blockchain data is fragmented. Every chain runs its own interface. Every protocol uses its own contracts. Covering five chains by hand is already a serious build. Covering fifty becomes a full-time team.
A wallet data API does that heavy lifting upstream. The provider runs the nodes. It indexes the blocks. It parses events and resolves positions. It attaches USD prices. The result is one consistent schema across many chains.
Delivery models differ. Most providers ship REST endpoints. Some add WebSockets or streaming. Some add webhooks for live updates. The shape of the data varies too. Some return raw events. Others return enriched portfolio views with prices and labels attached.
How to Choose a Crypto Wallet Data API
Chain coverage is the first filter.
A single-chain feed suits a narrow prototype. Multi-chain apps need breadth from day one. Adding a chain later often means a second integration. Pick coverage that matches where your product is heading.
Bitcoin and extended-key support are easy to overlook.
Many APIs stop at EVM and Solana. Bitcoin uses a different account model. Extended public keys like xpub map to many addresses at once. If you track Bitcoin users, this support saves real work.
DeFi resolution separates basic from deep.
Reading token balances is the easy part. Surfacing staking, lending, LP shares, and yield positions is harder. Teams often call this a crypto wallet DeFi positions API. Some APIs return only DEX activity. Others resolve full positions per wallet. Know which one you actually need.
Freshness and real-time delivery matter for live apps.
Polling works for dashboards that refresh slowly. Trading and alerting need lower latency. Webhooks and streaming reduce the load on your side.
AI agent access is now a real requirement.
Many teams build assistants that read wallet data directly. A Model Context Protocol (MCP) server exposes that data as callable tools. It removes custom glue code between the model and the API.
Pricing and free tiers shape the early build.
A generous free tier lowers the cost of prototyping. Credit-based pricing scales with how complex your calls are. Check the upgrade path before you commit. For a wider view of starter plans, see this free tier comparison.
The Best Crypto Wallet Data APIs of 2026
The list below starts with the swap layer most wallet apps add. It then moves through the data providers. Strengths and trade-offs differ a lot.
1. StealthEX API: The Swap Layer for Wallet Apps
One quick note up front. StealthEX is a swap and exchange API, not a wallet data API. It does not return balances or transaction history. We include it because wallet apps need more than data. They need a way for users to act on it.
At StealthEX, our non-custodial instant exchange API embeds swaps inside crypto products. Wallets, aggregators, and trading terminals plug it in for token swaps without taking custody. It pairs naturally with any of the data APIs below.
Coverage spans 2,000+ cryptocurrencies and 100+ fiat currencies. We support fixed-rate and floating-rate swaps. Users do not need an account to swap. Average completion runs under fifteen minutes.
Our model is revenue-sharing rather than subscription-based. Partners set a commission between 0 and 0.5 percent. There are no monthly fees and no call limits to manage. White-label options exist for branded integrations.
Key features:
- Non-custodial instant swaps embedded in your product
- 2,000+ cryptocurrencies and 100+ fiat currencies
- Fixed-rate and floating-rate swap options
- No user account required to swap
- Customizable partner commission up to 0.5 percent
- White-label option for branded flows
Best suited for: Wallets, aggregators, and trading terminals that pair a data API with built-in swaps. Use this as the action layer on top of wallet data.
2. CoinStats Wallet API: Best for Most Use Cases
CoinStats Wallet API is the broadest data provider in this guide. It covers 120+ blockchains through one integration. EVM chains, Solana, Bitcoin, Cardano, Tron, Cosmos, and Layer 2 networks share one request format.
The model is simple. You pass a wallet address and a connection ID. You get balances, token holdings, and transaction history back. The response shape stays the same across every chain.
Bitcoin support is the differentiator most developers miss. The API accepts standard BTC addresses plus xpub, ypub, and zpub extended keys. One extended key returns balances and history across all derived addresses. Many competitors stop short of this.
DeFi resolution is the other standout. Positions auto-detect across 10,000+ protocols. Staking, lending, LP shares, and yield farming surface per wallet without manual setup. Resolution works the same for EVM, Ethereum, and Solana wallets. Portfolio analytics with PnL and charts sit alongside the raw data.
The wallet endpoints are one part of an all-in-one crypto API. The same key reaches market data, historical prices, and news. A Token Risks endpoint also screens contracts for scam patterns. It scores honeypots, hidden mint functions, and blacklists per token.
CoinStats MCP Server exposes wallet, DeFi, and portfolio tools to AI agents. It works with Claude, Cursor, Claude Code, VS Code, and N8N. The same API key covers both REST and MCP. The free tier follows a credit-based model with no card required at signup.
The same infrastructure powers the CoinStats app and its 1M monthly users. You can find more in this best crypto wallet APIs guide.
Key features:
- 120+ blockchains in one request format
- Bitcoin xpub, ypub, and zpub extended-key support
- 10,000+ DeFi protocols auto-detected per wallet
- Portfolio analytics with PnL and charts
- All-in-one API: market data, wallet, DeFi, and news
- Token Risks endpoint for contract scam screening
- CoinStats MCP Server for AI agents
- Credit-based free tier, no card at signup
Best suited for: Probably most crypto use cases. Portfolio trackers, tax tools, multi-chain wallet apps, DeFi dashboards, and AI assistants. Pick this when broad coverage and deep DeFi resolution belong in one integration.
3. Crypto APIs: Best for Fintech Infrastructure
Crypto APIs targets fintech and enterprise teams building on regulated infrastructure. It serves 500+ companies, including Ledger, Nexo, Swyftx, and CoinSwitch Kuber. The product surface is wide.
Wallet data sits inside a larger toolkit. Address endpoints return balances and transaction data. HD Wallets Management handles wallet generation and address derivation. Node-as-a-service, market data, and AML screening round out the offering.
Chain coverage is solid but narrower than the broadest providers. Public materials reference roughly 30 to 50 networks for wallet data. The focus is the major chains teams actually deploy on. Bitcoin, Ethereum, XRP, Litecoin, BNB Smart Chain, Polygon, and Tron sit among them.
The enterprise focus shows in the infrastructure. Blockchain Events deliver real-time webhooks in under 100ms. The platform cites ISO and SOC compliance. Throughput reaches into the tens of thousands of requests per second.
Key features:
- 500+ companies served, including Ledger and Nexo
- Address and transaction endpoints for core wallet data
- HD Wallets Management and node-as-a-service
- AML address screening across major chains
- Real-time Blockchain Events under 100ms
- ISO and SOC compliance for regulated builds
Best suited for: Fintech and enterprise teams that need audited infrastructure, compliance tooling, and node access in one place.
4. Covalent (GoldRush): Best for Broad Multichain Primitives
Covalent runs under the GoldRush product brand. It provides structured onchain data across 100+ chains through one REST API. The platform pre-indexes and normalizes raw data into a single schema.
Coverage includes token balances, transaction histories, event logs, and asset metadata. Switching chains takes only a single path parameter change. The data ships with spot and historical fiat prices for portfolio views.
Tooling is a real strength here. SDKs exist for TypeScript, Python, and Go. The GoldRush Kit ships pre-built React components for balances and transaction history. A streaming API delivers live onchain updates over WebSockets.
GoldRush also runs an MCP server for AI agents. It exposes 27+ tools and works with Claude Code, Cursor, and Copilot. The platform is SOC 2 compliant and used by teams like Rainbow and ThorWallet.
One trade-off is worth noting. DeFi coverage centers on DEX activity. Lending, staking, and yield positions do not surface as distinct portfolio items. Raw balances render cleanly, but deep position tracking needs another layer.
Key features:
- 100+ chains under one unified schema
- Token balances, transactions, logs, and metadata
- SDKs for TypeScript, Python, and Go
- GoldRush Kit React components for fast frontends
- WebSocket streaming and a 27-tool MCP server
- SOC 2 compliant, trusted by 70K+ developers
Best suited for: Teams that want normalized multichain primitives and ready-made UI components. A strong fit when balance and transaction data matter more than deep DeFi resolution.
5. Allium: Best for Enterprise Data Teams
Allium is an enterprise blockchain data platform. It covers 150+ blockchains, including EVM chains, Solana, Bitcoin, and Hyperliquid. The platform spans 1,000+ enriched schemas.
Its real-time Wallet API returns up-to-date balances for native and ERC-20 tokens. You can pass multiple chain and address pairs in one request. Transaction data, prices, and curated wallet labels sit alongside it. The infrastructure has handled large wallets holding tens of thousands of tokens.
Allium reaches beyond live APIs. Datastreams push enriched events through Kinesis, Pub/Sub, Kafka, or webhook. The same data flows into warehouses like Snowflake, BigQuery, and Databricks. Cross-chain transfer stitching and stablecoin tables are notable differentiators.
The track record skews institutional. Phantom uses Allium to power wallet balances and activity for millions of users. MetaMask, Visa, and Grayscale appear among its customers. An Allium MCP Server lets agents query data through structured tool calls.
Key features:
- 150+ blockchains and 1,000+ enriched schemas
- Real-time Wallet API with multi-address requests
- Datastreams via Kinesis, Pub/Sub, Kafka, or webhook
- Warehouse delivery to Snowflake, BigQuery, Databricks
- Cross-chain and stablecoin data models
- SOC 1 and SOC 2 certified, used by Phantom and Visa
Best suited for: Enterprise data and engineering teams that need raw, auditable data plus production APIs. A fit when warehouse integration and custom analytics matter as much as endpoints.
6. Dune Sim: Best for Real-Time Primitives
Dune Sim is the real-time developer platform from Dune. It covers 60+ chains across EVM and SVM, including Solana. The product focuses on fast, pre-indexed primitives.
The endpoints map cleanly to wallet use cases. Balances return all token holdings ordered by USD value. Transactions return decoded activity. Activity feeds surface swaps, transfers, and approvals. Collectibles, token holders, DeFi positions, and stablecoin balances round out the set.
Speed is the headline. Data is available within roughly 200ms of block propagation. Prices and metadata arrive pre-enriched. Teams like Abstract and Dynamic use it to replace in-house data stacks.
One scope note helps. Sim returns current state through its REST endpoints. Historical time-series and multi-address aggregation live in DuneSQL instead. That split keeps the API fast for live lookups.
Key features:
- 60+ chains across EVM and SVM
- Balances, transactions, activity, and DeFi positions
- NFT, token holder, and stablecoin endpoints
- Data within roughly 200ms of block propagation
- Pre-enriched prices and metadata
- Tight link to the Dune analytics ecosystem
Best suited for: Developers who want low-latency wallet primitives and the Dune ecosystem behind them. Strong for live portfolio views and activity feeds.
Wallet Data API Comparison: What Actually Matters
Coverage, depth, and delivery model decide most choices. Here is how the providers line up.
Best Overall for Wallet Data
CoinStats Wallet API fits the widest range of builds. It pairs 120+ chains with Bitcoin xpub support and per-wallet DeFi resolution. It is also part of an all-in-one API. That stack adds market data, news, and token risk screening.
Best for Embedded Swaps
StealthEX API is the action layer, not a data source. It adds non-custodial swaps to any wallet or aggregator. Use it on top of a data API rather than instead of one.
Best for Fintech Infrastructure
Crypto APIs suits regulated and enterprise teams. AML screening, HD wallet management, and node access sit beside the wallet endpoints. Compliance certifications come built in.
Best for Multichain Primitives and UI
Covalent (GoldRush) delivers broad coverage and ready-made components. The React kit and SDKs speed up frontend work. Expect DEX-level DeFi rather than full position tracking.
Best for Enterprise Data Teams
Allium spans APIs, streams, and warehouse delivery. It fits teams building custom analytics on auditable data. The institutional customer list reflects that focus.
Best for Low-Latency Real-Time Data
Dune Sim returns current state fast across EVM and Solana. It is a clean fit for live portfolio and activity views. Historical analysis shifts to DuneSQL.
Which Wallet Data API Should You Choose?
Match the API to the job, not the hype.
Choose CoinStats Wallet API for a broad, all-in-one default. It covers the most chains, supports Bitcoin xpub, and resolves DeFi per wallet. Add StealthEX API when users need to swap inside your app.
Choose Crypto APIs when compliance and node infrastructure lead the requirements. Choose Covalent for normalized primitives and fast frontends. Choose Allium for enterprise data pipelines and warehouse delivery. Choose Dune Sim for low-latency real-time lookups.
Many teams pair two of these. A data API handles reads. A swap API handles action. For Solana-specific builds, this roundup of Solana API providers goes deeper on that ecosystem.
Conclusion
Wallet data is the foundation of onchain products. The right API saves months of node and indexer work. The wrong one forces a painful migration later.
Start with coverage and depth that match your roadmap. Confirm Bitcoin and DeFi support if you need them. Then layer swaps on top so users can act on what they see. Build on the data layer that scales with you, and you ship faster.
Make sure to follow StealthEX on Medium, X, Telegram, YouTube, and Publish0x to stay updated about the latest news on StealthEX and the rest of the crypto world.
Don’t forget to do your own research before buying any crypto. The views and opinions expressed in this article are solely those of the author.
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