Choosing a crypto data API is one of the first architectural decisions you make when building a crypto app. It's also one of the easiest to get wrong. The landscape is fragmented: different providers specialize in different things, pricing models vary wildly, and the gap between "works for a hackathon" and "works in production" is wider than most developers expect.
This guide compares the major crypto API options across what actually matters: data freshness, coverage, pricing, real-time capabilities, and developer experience. There's no single best crypto API for every project, but there is a clear winner for most production use cases.
What We're Comparing (and Why It Matters)
Not all crypto APIs do the same thing. Here's what we're evaluating.
- Data freshness / latency. How old is the data when it hits your app? Ranges from sub-second to 60+ seconds. Fine for dashboards at 30 seconds; dangerous for trading bots.
- Token and chain coverage. How many tokens and networks? Your users will ask for Base, Arbitrum, and Solana support eventually. You need a provider that already covers them.
- Data enrichment. Raw blockchain data (transaction bytes, account states) vs production-ready data (USD prices, OHLCV charts, holder analytics). If the API gives you raw data, you're building the enrichment pipeline yourself.
- Real-time capabilities. WebSocket subscriptions, webhooks, streaming. REST polling works for slow-moving data. For live price feeds and transaction streams, you need push-based delivery.
- Pricing and free tier. Some providers limit by requests, others by compute units, others by endpoints. A "generous" free tier that locks you out of the endpoints you need isn't generous at all.
- Developer experience. SDKs, documentation quality, GraphQL vs REST, and how quickly you go from sign-up to working code.
The Contenders
Here's who we're comparing and what each provider is built for.
Codex is an enriched blockchain data API built for production applications. 70M+ tokens, 80+ chains, 1-second data freshness. GraphQL API, WebSocket subscriptions, and a TypeScript SDK. Powers TradingView, Coinbase, and Uniswap.
CoinStats is an all-in-one market data, wallet, and portfolio API built on the portfolio tracker used by 1M+ people. 100K+ coins, 200+ exchanges across CEX and DEX. Real-time prices, OHLCV charts, wallet balances, and portfolio tracking over REST, plus an MCP server for AI agents. Built for breadth, not speed.
StealthEX provides a public crypto exchange API for wallets, aggregators, and trading terminals. It supports instant swaps of over 2,000 assets, customizable transaction fees, straightforward documentation, and partner support.
CoinMarketCap offers market data and rankings, owned by Binance since 2020. Tracks 51M+ assets across 947+ exchanges, with a generous free tier (15K credits across 60+ endpoints, commercial use allowed) and paid plans from $29/month. Added on-chain DEX and holder endpoints plus beta WebSocket streaming in 2026.
Alchemy is a leading node infrastructure provider. 50+ chains, generous free tier (300M compute units/month), strong developer platform. Better for raw blockchain access than enriched financial data.
Moralis is a Web3 development platform covering EVM chains and Solana. Token prices, NFT data, wallet balances, transaction history. Good for rapid prototyping.
The Graph is a decentralized indexing protocol. Write custom "subgraphs" to index specific smart contract events. Powerful and censorship-resistant, but requires writing and maintaining subgraph code.
QuickNode is a node infrastructure provider with 77+ chains. Fast RPC access with add-on data services. Primarily a node provider, not an enriched data API.
Birdeye is a Solana-focused trading data platform with a strong UI. API access for DEX data, token prices, and trading analytics. Expanding beyond Solana but still primarily a Solana tool.
Head-to-Head Comparison Table
This is the core reference. Bookmark it.
| Feature | Codex | CoinStats | StealthEX | CoinMarketCap | Alchemy | The Graph | Moralis |
|---|---|---|---|---|---|---|---|
| Data freshness | 1 second | Not published (REST polling) | Real-time quotes per request | ~60s REST, ~5-15s WebSocket | ~3 seconds (enriched) | Varies by indexer | ~5 seconds |
| Token coverage | 70M+ | 100K+ | 2,000+ | 51M+ | Limited | Custom (per subgraph) | Broad (EVM + Solana) |
| Chain coverage | 80+ | Multichain | Multichain (BTC, ETH, SOL, TRON, XRP + more) | Multichain (DEX endpoints) | 50+ | 80+ | 20+ EVM chains |
| USD pricing | Yes | Yes | No (crypto-to-crypto quotes) | Yes | No (raw data) | No | Yes |
| OHLCV charts | Yes | Yes | No | Yes (paid) | No | No | No |
| Holder analytics | Yes | No | No | Yes | No | Custom only | Limited |
| WebSockets | Yes (99.9% uptime) | No | No | Yes (beta, Startup+) | Yes | No | Streams (paid) |
| Webhooks | Yes | No | Yes | No | Yes | No | Yes |
| GraphQL | Yes | No | No | No | Yes | Yes | No |
| TypeScript SDK | Yes | No official | No | Community | Yes | Community | Yes |
| Free tier | 10K req/month | 20K credits/month | Yes (free API key) | 15K credits/month | 300M CU/month | Pay per query (GRT) | 40K CU/day |
| Paid pricing | Growth from $350/month | From $49/month (credits) | None (partner earns 0.4% of swap volume, adjustable) | From $29/month | CU-based (usage) | Variable (GRT tokens) | From $49/month |
| API style | GraphQL + WebSocket | REST | REST | REST + WebSocket (beta) | JSON-RPC + REST | GraphQL | REST |
| Primary strength | Enriched data, speed | All-in-one: data, wallet, portfolio | Non-custodial instant swaps, no KYC | Rankings, history, holder analytics | Node infrastructure | Decentralized indexing | Rapid prototyping |
Note: Competitor pricing and features change frequently. Verify current plans at each provider's pricing page before making a decision.
Pricing Breakdown: What You Actually Pay
The free tier comparison deserves its own section because the numbers above don't tell the full story.
| Provider | Free Tier | What It Gets You | First Paid Tier |
|---|---|---|---|
| Codex | 10K requests/month | Full query access across all 80+ chains: prices, charts, holders | Growth from $350/month (1M requests, WebSockets, webhooks) |
| CoinStats | 20K credits/month | Market data, prices, charts, wallet and portfolio endpoints, 100K+ coins; commercial use allowed | $49/month (Starter, 1M credits) |
| StealthEX | Free API key | Instant swaps across 2,000+ assets, no registration or KYC | None: free to integrate, partner earns 0.4% of swap volume by default (adjustable) |
| CoinMarketCap | 15K credits/month, 50/min | 60+ endpoints including on-chain DEX and holder data, commercial use allowed | $29/month (Builder) |
| Alchemy | 300M CU/month | Raw node access + some enhanced APIs, no enriched financial data | Pay-as-you-go |
| The Graph | Pay per query | GRT token payments, cost depends on query complexity and indexer | Variable |
| Moralis | 40K CU/day | Token prices, wallet data, NFT data | $49/month |
CoinMarketCap's free tier is the most generous of the market-data aggregators on raw volume: 15K credits across 60+ endpoints with commercial use permitted, though its 50 calls/min burst limit is modest. Alchemy's 300M compute units sound enormous, but compute units measure raw node calls, not enriched data requests, and you get raw blockchain data rather than USD prices or charts. Codex's 10K requests include query access to every endpoint and every chain; real-time WebSocket subscriptions unlock on the Growth plan.
Best Crypto API by Use Case
The right API depends entirely on what you're building. Here's the decision matrix.
Building a trading platform or bot
Best choice: Codex
Trading requires sub-second data freshness, real-time WebSocket feeds, and enriched data (USD prices, OHLCV candles, liquidity depth) out of the box. Codex delivers 1-second latency with 99.9% WebSocket uptime. CoinMarketCap's roughly 60-second REST refresh, and a beta stream that favours the top 500 assets, is too slow for most trading applications. Alchemy gives you raw data that you'd need to enrich yourself.
Adding crypto swaps to a wallet or platform
Best choice: StealthEX
StealthEX is suited to wallets, exchange aggregators, and trading terminals that want to integrate instant crypto swaps across hundreds of assets. Its API offers adjustable transaction fees, straightforward documentation, partner support, and managed maintenance and asset additions, reducing the development work required to launch and maintain exchange functionality.
Broad market and wallet data across CEX and DEX
Best choice: CoinStats
Some apps need wide market coverage more than sub-second speed. CoinStats aggregates 100K+ coins from 200+ exchanges, CEX and DEX alike, with real-time and historical prices, OHLCV charts, market cap, and BTC dominance over one REST API. Wallet balances and portfolio tracking sit behind the same key, and an MCP server lets AI agents pull the same feeds. No WebSockets or holder analytics, though: for trading-grade speed or on-chain depth, pair it with Codex.
Building on Ethereum with node access
Best choice: Alchemy
Alchemy is the strongest node infrastructure provider. If your primary need is sending transactions, reading smart contract state, and interacting with the blockchain directly, Alchemy's developer platform is mature and well-documented. Just know that you'll need a separate data API (like Codex) for enriched data: prices, charts, and analytics.
Custom blockchain queries for a specific protocol
Best choice: The Graph
If you need to index specific smart contract events in a custom way, and you value decentralization, The Graph lets you write subgraphs that define exactly what data to capture. The tradeoff: you write and maintain AssemblyScript code, data freshness depends on which indexer picks up your subgraph, and you get no built-in enrichment. See our guide to blockchain indexers for more on this approach.
Solana-focused project
Best choice: Codex or Helius
Helius is the strongest Solana-specific provider, excellent for Solana RPC, compressed NFTs, and the DAS API. Codex covers Solana with enriched data (prices, OHLCV, holders, launchpad tracking) and gives you 80+ other chains through the same API. If you need Solana infrastructure, Helius. If you need enriched Solana data or plan to expand beyond Solana, Codex. See our Solana API guide for the full comparison.
Just need CEX market data
Best choice: CoinMarketCap
CoinMarketCap has the cheapest paid entry point ($29/month), 51M+ tracked assets across 947+ exchanges, and holder analytics no other aggregator here matches. The caveats: Binance ownership (data independence concerns), REST data on a roughly 60-second refresh cycle, and streaming that is beta, gated to $79/month and up, and billed per message.
The Hidden Costs Most Developers Miss
The sticker price of a crypto API is often the smallest part of the total cost. Here's what actually gets expensive.
Raw data APIs require enrichment pipelines
If you choose a raw data provider like Alchemy or The Graph, you're getting blockchain data, not product-ready data. To go from "here's a raw swap transaction" to "this token costs $1.47 and has $2.3M in 24h volume," you need to build an enrichment pipeline yourself: parsing DEX transactions, calculating prices from pool reserves, aggregating volume, computing OHLCV candles, tracking holders, and maintaining it all as DEXes update their contracts.
That costs $100K+ per year in infrastructure and 1,000+ developer hours. Sudoswap was spending over $50K annually on AWS just to run their own indexing pipeline before switching to Codex. Unless blockchain data processing is your core product, building this is a distraction.
Cheap APIs with high latency cost you in stale data
Aggregator APIs like CoinMarketCap are inexpensive, and for many use cases that's the right tradeoff. But data on a 60-second refresh cycle isn't free. For a portfolio tracker, it means slightly inaccurate balances. For a trading application, it means executing trades on prices that no longer exist. One bad trade on stale data can cost more than a year of API fees.
Multiple providers means multiple problems
Using CoinMarketCap for prices, Alchemy for node access, and The Graph for custom queries means three data formats, three billing systems, three sets of rate limits, and three points of failure.
TradingView consolidated from 3-4 crypto data providers down to Codex to eliminate exactly this complexity. One API means simpler debugging, predictable billing, and consistent data. The trend in production crypto applications is consolidation, not fragmentation.
Free tiers aren't apples to apples
Alchemy's "300M compute units" measures raw node calls. Codex's "10K requests" measures enriched data queries, where one request returns a fully formatted price, chart, or holder list. CoinMarketCap's "15K credits" spend at different rates per endpoint, so your real call count depends on which ones you hit. Map out your actual queries before comparing. The "most generous" free tier on paper is often not the most useful in practice.
Our Recommendation
For broad market data on a budget, CoinStats and CoinMarketCap are fine starting points. If what you actually need is swap functionality inside a wallet or aggregator rather than market data, StealthEX's partner API is free to integrate. Use the simplest tool that solves your problem.
For anything production-grade (trading platforms, wallets, real-time dashboards, bots, analytics), Codex gives you enriched data at trading-grade speed without building a pipeline. One API, 80+ chains, 70M+ tokens, 1-second freshness, WebSocket subscriptions with 99.9% uptime. That's what TradingView, Coinbase, and Uniswap run on.
The broader trend is consolidation. Companies that started with 3-4 specialized providers are converging on one enriched data API. Codex is built for that pattern: start with one chain, expand to 80+, never switch providers.
FAQ
What is the best free crypto API for developers?
For enriched on-chain data such as real-time prices, OHLCV charts, and holder analytics, Codex's free tier (10K requests/month) provides significant depth across 80+ chains. Alchemy's free tier (300M compute units/month) is generous for raw node access but gives you raw blockchain data, not enriched financial data. CoinStats offers a free tier (20K credits/month, commercial use allowed) covering market data, prices, charts, and wallet plus portfolio endpoints across 100K+ coins, useful if you're building portfolio or wallet features. And if you need exchange functionality rather than data, StealthEX's swap API is entirely free to integrate, with no paid plans: the partner earns a share of swap volume instead.
What is the best API for real-time crypto data?
Codex delivers enriched data with 1-second freshness and offers WebSocket subscriptions with 99.9% uptime: price updates, trade events, OHLCV candle updates, and new token launch alerts, all pushed to your application in real time. Alchemy's enhanced APIs have roughly 3-second latency for enriched data. CoinMarketCap's REST endpoints refresh on roughly a 60-second cycle and its beta WebSocket pushes about every 5 seconds for the top 500 assets and 15 seconds beyond, which is acceptable for dashboards but awkward for trading or alerting on long-tail tokens.
How much does a crypto data API cost?
Costs vary significantly by provider and usage model. Free tiers range from 10K requests/month (Codex) to 300M compute units/month (Alchemy), though these units aren't directly comparable. Paid plans range from $29/month (CoinMarketCap Builder) to $49/month (Moralis) to $350/month (Codex Growth, 1M requests) to enterprise pricing. The real cost is often not the API itself. It's the engineering time to enrich raw data into production-ready formats if you choose a raw data provider, which can run $100K+ per year in infrastructure and maintenance.
What is the difference between a crypto data API and a node provider?
A node provider (Alchemy, QuickNode, Infura) gives you raw blockchain access: raw transaction data, account states, block contents, and the ability to send transactions. A crypto data API (Codex, CoinStats) processes and enriches that raw data into developer-friendly formats: USD prices, OHLCV charts, holder analytics, aggregated volume, token metadata. Most production applications need both: a node provider for sending transactions and interacting with smart contracts, and a data API for reading enriched data. For a deeper explanation, see our guide on what a blockchain indexer is and how indexed data powers crypto apps.
How do I add crypto swaps to my app without building an exchange?
Use an exchange API such as StealthEX. It handles swap execution across 2,000+ assets while you keep your own interface: non-custodial, no registration or KYC, and free to integrate, with the partner earning an adjustable fee (0.4% of swap volume by default). Pair it with a data API like Codex for prices, charts, and analytics, and you get full exchange functionality without running liquidity infrastructure yourself.
Try Codex free at codex.io. See why TradingView, Coinbase, and Uniswap trust Codex for their blockchain data.