Research

Top Tools and APIs Every Crypto Programmer Should Know

Discover top crypto APIs, developer libraries, and open source tools that power modern blockchain applications. Learn which solutions programmers use to build smarter crypto projects.
Token Metrics Team
5
MIN

The rapid evolution of cryptocurrencies and blockchain technology has transformed the programmer's toolkit. With thousands of coins, myriad chains, and constantly changing data, developers face a unique set of challenges—and opportunities—for innovation. Access to robust APIs, powerful software tools, and automation frameworks is now the backbone of successful crypto development. But which tools and APIs stand out, and how can programmers leverage them most effectively?

Data Access: Core APIs That Power Crypto Apps

APIs are the connective tissue of crypto ecosystems, granting developers access to everything from real-time prices to on-chain analytics. Leading APIs for general-purpose crypto data include:

  • Token Metrics API: Delivers real-time prices, trading signals, token analytics, and on-chain intelligence in a streamlined package—ideal for portfolio tools, custom dashboards, and AI crypto agents.
  • CoinGecko API & CoinMarketCap API: Widely adopted for fetching coin prices, historical data, and basic market stats. Both offer generous free tiers and support for hundreds of assets.
  • CryptoCompare API: Excels at aggregated pricing and historical OHLCV data for major and emerging tokens.
  • Glassnode API: Provides on-chain analytics, key network health indicators, and user address statistics for Bitcoin, Ethereum, and select other blockchains.

When evaluating APIs, focus on latency, coverage, reliability, and pricing. For power users, combining multiple APIs—one for fast price ticks, another for analytics—can yield a richer app experience.

Web3 Libraries and Blockchain Interaction

To move beyond price feeds and statistics, programmers need libraries that let them interact directly with blockchains. Popular choices include:

  • web3.js (for Ethereum and EVM chains): The standard JavaScript library for reading from and writing to smart contracts. Its widespread adoption means strong documentation and fast troubleshooting.
  • ethers.js: A leaner, modern alternative to web3.js with an improved developer experience and clear separation of concerns. Frequently used in dApp and wallet development.
  • Solana Web3.js: Purpose-built for the Solana chain, providing access to wallet management, transaction sending, and program deployment.
  • BitcoinJS: A robust set of bitcoin-focused tools for crafting transactions, managing keys, and building lighter clients.

When building cross-chain or multi-protocol applications, consider abstraction libraries like Moralis or Infura to standardize access and boost reliability.

Automation, Research, and AI Analytics

Quantitative research, automated trading, and actionable intelligence are increasingly important areas for crypto programmers. Here are some tools advancing the field:

  • Python Libraries (ccxt, pycoingecko, web3.py): The ccxt library supports unified trading API access to dozens of exchanges for algorithmic trading and market research. pycoingecko fetches comprehensive price data from CoinGecko, while web3.py allows direct Ethereum interaction.
  • Alchemy & QuickNode: Managed web3 infrastructure layers that offer turnkey node hosting, enhanced analytics, and performance monitoring. These services reduce operational headaches when scaling production apps.
  • AI-Powered Research Tools (Token Metrics, Messari): Platforms like Token Metrics and Messari leverage AI and big data to surface trends, risk signals, and deep network insights—resources invaluable for building smarter automation and predictive analytics.

For custom analytics, combining API data with Python-based data science (using Pandas, Numpy, or PyTorch/TensorFlow) unleashes powerful modeling capabilities. Many teams run scheduled scripts or Lambda jobs that pull API data, process it, and feed insights directly into dashboards or real-time agents.

Open Source and Collaborative Developer Tools

Open source projects have accelerated innovation in crypto. For developers, the following tools and resources unlock new possibilities:

  • Hardhat & Truffle: Smart contract testing, simulation, and deployment for EVM-compatible chains. Supports complex scripting and plugin extensions.
  • MetaMask APIs: Essential for dApp compatibility, wallet integration, and user authentication across the web3 landscape.
  • Foundry: A high-performance, developer-friendly toolkit for smart contract creation with extensive testing capabilities.
  • OpenZeppelin Libraries: Battle-tested, audited Solidity contracts and utilities for security-focused development. Saves time and reduces risk.

Participating in open source helps programmers stay at the forefront of security updates, tooling improvements, and emerging best practices.

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What are the most popular APIs for crypto data access?

Some of the most widely used APIs include the Token Metrics API, CoinGecko API, and CryptoCompare API for price data, plus Glassnode and Chainalysis for on-chain analytics. The best API depends on use case—real-time trading apps may prioritize low-latency data, while research dashboards need deeper analytics and coverage.

How do you choose the right programming language for crypto development?

The choice depends on your project: Solidity is used for Ethereum smart contracts, Rust and C++ for Solana and Polkadot, JavaScript for web3 frontends, and Python for automation and analytics. Many developers combine languages for optimal results.

Can I integrate crypto APIs into mobile apps?

Yes. Most crypto APIs offer REST or WebSocket endpoints that can be consumed by mobile frontends (iOS, Android, cross-platform). Security and performance are critical—always safeguard keys and minimize on-device sensitive data.

What is the value of AI in developer crypto tools?

AI supports smarter data synthesis, risk assessment, pattern recognition, and predictive analytics—streamlining everything from backtesting to sentiment analysis. Platforms such as Token Metrics bring AI-driven signals and deep analysis to developer workflows.

Are open source crypto developer tools secure?

Open source tools like Hardhat, Truffle, and OpenZeppelin are generally well-maintained and audited but still require careful review, secure library management, and rigorous testing. Always vet dependencies and stay up to date with patches.

Disclaimer

This blog is for informational and educational purposes only. It does not constitute investment advice, endorsement, or financial recommendations. All tools and APIs discussed should be independently evaluated for your use case and risk profile.

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Token Metrics Team
Token Metrics Team

Recent Posts

Token Metrics API

How to Build Crypto Trading Dashboard Using the Token Metrics Crypto Data API on Dune

Token Metrics Team
8 min
MIN

In today’s fast-paced crypto world, real-time data isn’t a luxury—it’s a necessity. For traders, analysts, and developers, being able to access live, actionable insights can mean the difference between profit and loss. That’s why the integration of the Token Metrics Crypto Data API with Dune is a game-changer for anyone seeking to create live dashboards backed by intelligent trading data.

In this post, we’ll walk through how to use this top crypto API to build dynamic dashboards on Dune. Whether you’re tracking bullish signals, backtesting trading strategies, or identifying top-performing tokens, this integration makes it possible—without any paid license.

Let’s dive into how you can use the best free crypto API available today to transform your trading.

What Is the Token Metrics Crypto Data API?

The Token Metrics Crypto Data API is a developer-focused gateway to powerful, AI-driven crypto data. It’s one of the top crypto APIs in 2025, giving you access to:

  • Real-time and historical trading signals
  • Proprietary trader and investor grades
  • Alpha metrics comparing trading vs. holding performance
  • Bullish and bearish token flags

This API is used by both professional quant traders and beginners seeking to automate insights. And the best part? Token Metrics provides free crypto API access to selected datasets, allowing you to create powerful dashboards without spending a dime.

Why Dune + Token Metrics API = Power Tools for Traders

Dune is a blockchain analytics platform that allows you to write SQL queries and create dashboards using on-chain and off-chain data. Now that Token Metrics datasets are available on Dune, you can combine the best of both worlds:

  • Free access to high-signal proprietary metrics
  • Real-time data visualizations via Dune’s drag-and-drop dashboard builder
  • Actionable insights based on AI-driven trading intelligence

This integration unlocks a whole new level of transparency and utility for crypto analysts, portfolio managers, and DeFi enthusiasts.

Getting Started: Accessing Token Metrics Data on Dune

To begin, create a free Dune account. Once logged in, navigate to the Token Metrics datasets. These are publicly accessible and updated regularly. You’ll find tables for:

  • trading_signals
  • trader_grades
  • investors_grades
  • tokens

Start a new SQL query and choose the dataset you want to explore. Here’s what you’ll find in the trading signals table:

‍

‍

Step-by-Step: Creating an Actionable Dashboard with Token Metrics Data

1. Query the Trading Signal Returns

Write a SQL query to calculate the average return of trading vs. holding strategies. For example:

This gives you the alpha—how much better the Token Metrics strategy performs compared to just HODLing.

In one real example, the average signal return across all tokens was 1630%, while holding returned just 400%. That’s a 12X improvement powered by this top crypto API.

2. Identify Top-Performing Tokens

Now let’s list tokens with the highest average alpha:

Tokens like BTC, ETH, BNB, and even newer ones like Virtuals stand out due to exceptional alpha performance.

3. Visualize Trader Grades vs. Alpha

The trader grade is a proprietary score from Token Metrics that predicts how favorable a token is for short-term traders.

Use a scatter plot to correlate trader grades with average alpha:

  • X-axis: Trader Grade
  • Y-axis: Average Alpha
  • Group by: Token Symbol

This helps you visually determine which tokens score high and offer exceptional returns—an essential tool for making actionable trading decisions.

4. Track the Latest Bullish Signals

Want to know which tokens are bullish right now? Here’s a query to find the most recent tokens flagged as bullish:

For example, on July 4th, tokens like BNB, XRP, and BTC were among the most recent bullish signals—perfect for immediate trade setups.

5. Build and Share Your Dashboard

Once you’ve run your queries:

  • Click “Add Visualization” in Dune
  • Choose from chart types (bar, scatter, progress bar, etc.)
  • Customize colors and filters
  • Combine multiple charts into a single dashboard

Your final product will be a real-time dashboard powered by the best crypto API, delivering insights that you—and your team—can act on instantly.

Why Token Metrics Is the Best Free Crypto API for Traders

Here’s why Token Metrics stands out among other APIs:

✅ AI-Driven Signals

Most APIs deliver raw data. Token Metrics provides curated signals, generated from machine learning models trained on market cycles, indicators, and price action.

✅ Proprietary Metrics

Access unique indicators like trader grade and investor grade, unavailable anywhere else.

✅ Real Historical Alpha

Use the API to backtest strategies. In the example shown, the AI strategy outperformed the market by over 1000X for some tokens.

✅ Seamless Integration

Whether you're using Dune, Zapier, OpenAI, or Eliza OS, Token Metrics is easy to integrate and query—making it the top crypto API for developers and analysts alike.

Final Thoughts

The combination of Token Metrics’ intelligent data and Dune’s visualization tools puts immense power in your hands. Whether you’re tracking market trends, building bots, or guiding portfolio decisions, this integration gives you everything you need to trade smarter.

With free access to real-time trading signals, alpha comparisons, and powerful visualizations, Token Metrics proves why it's the best crypto API for today’s data-driven investor.

Ready to try it out?
👉 Explore the Free Crypto API
👉 Start Building on Dune

Crypto Basics

What Is an ETF Stock? A Beginner’s Guide to Exchange-Traded Funds in 2025

Token Metrics Team
8 min
MIN

In today’s fast-moving financial markets, Exchange-Traded Funds, or ETF stocks, have emerged as one of the most popular investment vehicles for beginners and professionals alike. But what exactly is an ETF stock, how does it work, and why is it considered a smart way to invest?

This guide will walk you through everything you need to know about ETF stocks in 2025—including how they work, their benefits and risks, and how AI platforms like Token Metrics are changing the way people research and trade ETFs in both traditional and crypto markets.

📌 What Is an ETF Stock?

An ETF stock refers to a share of an Exchange-Traded Fund—a type of investment fund that trades on stock exchanges, much like individual company stocks. Each ETF holds a basket of underlying assets such as:

  • Stocks (e.g., S&P 500 companies)
  • Bonds
  • Commodities (like gold or oil)
  • Currencies
  • Cryptocurrencies (Bitcoin, Ethereum, etc.)

When you buy an ETF stock, you’re buying a fractional share of the entire portfolio of assets held by that ETF.

🔍 How Does an ETF Stock Work?

ETF stocks work like this:

  1. Creation: An asset management company (like BlackRock, Vanguard, or Fidelity) creates an ETF that tracks a specific index, sector, or asset type.
  2. Listing: The ETF is listed on a stock exchange such as the NYSE or Nasdaq.
  3. Trading: Investors can buy and sell ETF shares throughout the trading day, just like they would a stock like Apple or Tesla.
  4. Price Movement: The price of an ETF stock fluctuates during the day based on the Net Asset Value (NAV) of its holdings and supply-demand dynamics in the market.

This model provides a liquid, transparent, and low-cost way for investors to gain diversified exposure to entire markets or sectors.

📊 Example of an ETF Stock

A good example is the SPDR S&P 500 ETF Trust (SPY), which tracks the performance of the S&P 500 index. When you buy a share of SPY, you gain exposure to 500 of the largest U.S. companies—without needing to buy each stock individually.

✅ Benefits of ETF Stocks

ETF stocks offer numerous advantages for investors in 2025:

1. Diversification

Instead of buying individual assets, ETF stocks offer instant diversification by holding dozens or hundreds of securities in a single share.

2. Liquidity

ETFs are traded on exchanges, making them highly liquid. You can buy or sell them at market prices during normal trading hours.

3. Lower Costs

ETFs typically have low expense ratios (as low as 0.03%), especially compared to mutual funds or actively managed portfolios.

4. Transparency

Most ETFs disclose their holdings daily, giving investors a clear view into what they’re buying.

5. Flexibility

You can use ETFs for long-term investing, short-term trading, hedging, or generating income through dividends.

⚠ Risks of ETF Stocks

Despite their many benefits, ETF stocks do come with some risks:

1. Market Risk

ETF stocks are still subject to market volatility. If the underlying assets decline in value, so will the ETF.

2. Tracking Error

Some ETFs may not perfectly replicate the performance of their index due to fees, slippage, or illiquid assets.

3. Overexposure

Because ETFs make it easy to invest, some investors may unknowingly become overexposed to a particular sector or strategy.

4. Liquidity Risk

Not all ETFs are created equal. Low-volume ETFs may have wider bid-ask spreads, increasing trading costs.

đŸȘ™ Crypto ETFs: The New Frontier

In 2025, crypto ETF stocks have become a hot trend. These funds allow investors to gain exposure to digital assets without managing private keys, wallets, or blockchain protocols.

Types of crypto ETFs include:

  • Spot ETFs: Hold actual crypto assets (e.g., Bitcoin, Ethereum).
  • Futures ETFs: Track the price of crypto futures contracts.

Popular examples in 2025 include:

  • IBIT (BlackRock Bitcoin ETF)
  • FBTC (Fidelity Bitcoin ETF)
  • ETHX (Ethereum Spot ETF)

Crypto ETFs have opened the door for institutional and traditional investors to gain exposure to the crypto market in a regulated and simplified manner.

đŸ€– How Token Metrics Helps You Trade ETF Stocks Smarter

Whether you're interested in traditional ETF stocks or crypto ETFs, Token Metrics provides the AI-powered insights you need to make better investment decisions.

🔎 1. AI-Powered Ratings

Token Metrics assigns each token or ETF a Trader Grade and Investor Grade based on price trends, volume, volatility, and technical strength—making it easy to spot outperformers.

📈 2. Bullish and Bearish Signals

AI-driven signals show when it’s time to buy or sell based on real-time metrics like ETF inflows, exchange balances, and market sentiment.

📊 3. Price Forecasts

Get access to predictive models that estimate where Bitcoin, Ethereum, and major crypto ETFs are headed—based on 80+ factors.

🔔 4. Smart Alerts

Set custom alerts for ETF stock signals, price movements, or grade changes so you never miss an opportunity.

By combining ETF investing with Token Metrics’ AI analytics, you gain an informational edge in markets that move faster than ever.

📈 Popular ETF Stocks in 2025

Here’s a list of top-performing ETF stocks across traditional and crypto sectors:

🧠 Final Thoughts

ETF stocks are a powerful investment tool in 2025, offering instant diversification, low fees, and easy access to traditional and crypto markets. Whether you're looking to build a retirement portfolio or ride the next Bitcoin rally, ETF stocks make it easier than ever to invest with confidence.

And with platforms like Token Metrics, you don’t need to guess your way through ETF trading. Use AI-driven insights, price predictions, and real-time data to get ahead of the curve—no matter what markets you trade.

Crypto Basics

What Is an ETF in Crypto? A Complete Guide for Crypto Investors in 2025

Token Metrics Team
8 min
MIN

The world of crypto investing is expanding at lightning speed. With growing institutional adoption and mainstream interest, new financial instruments are emerging to make crypto more accessible to everyday investors. One of the most impactful of these tools is the Exchange-Traded Fund (ETF) — and in 2025, crypto ETFs are playing a crucial role in shaping the future of digital asset investing.

📊 What Is an ETF?

An ETF (Exchange-Traded Fund) is a type of investment fund traded on traditional stock exchanges, just like individual stocks. ETFs hold a basket of assets such as stocks, bonds, commodities—or, in this case, cryptocurrencies.

When you buy shares of an ETF, you’re investing in a diversified portfolio managed by an institution. Instead of buying each asset individually, ETFs let you gain exposure to a group of assets through a single security.

đŸȘ™ What Is a Crypto ETF?

A crypto ETF is a special type of ETF that tracks the price of one or more cryptocurrencies, such as Bitcoin, Ethereum, or a basket of altcoins. These ETFs allow investors to gain exposure to crypto markets without needing to buy, store, or manage digital assets directly.

Crypto ETFs are listed on traditional financial exchanges (like Nasdaq or NYSE) and can be purchased via brokerage accounts—making them ideal for both institutional investors and crypto-curious retail traders.

🔍 Types of Crypto ETFs

There are two main categories of crypto ETFs:

1. Spot Crypto ETFs

  • Directly hold the underlying cryptocurrency (e.g., Bitcoin, Ethereum).
  • Track the real-time price of the asset.
  • Considered the most accurate and direct method of gaining crypto exposure.
  • Example: BlackRock’s iShares Bitcoin Trust.

2. Futures-Based Crypto ETFs

  • Do not hold actual cryptocurrency.
  • Invest in futures contracts that speculate on the asset’s future price.
  • Prone to “tracking errors” and additional management fees.
  • Example: ProShares Bitcoin Strategy ETF (BITO).

In 2025, spot ETFs have become more popular, especially after multiple approvals in major markets like the U.S., Canada, and Hong Kong.

✅ Benefits of Crypto ETFs

Crypto ETFs offer a range of advantages for investors seeking exposure to digital assets without managing crypto wallets or private keys.

1. Accessibility

  • Trade crypto exposure from a traditional brokerage account.
  • No need for crypto exchanges, wallets, or DeFi protocols.

2. Regulation and Security

  • Managed by licensed institutions and regulated by bodies like the SEC.
  • Custody solutions are handled by professionals (e.g., Coinbase Custody, Fidelity Digital).

3. Diversification

  • Some ETFs offer exposure to a basket of cryptocurrencies, reducing risk.
  • Others may focus on specific sectors like DeFi or metaverse tokens.

4. Tax and Retirement Account Eligibility

  • Can be included in IRAs, 401(k)s, and tax-advantaged portfolios in some jurisdictions.

⚠ Risks of Crypto ETFs

While crypto ETFs simplify access, they are not risk-free.

1. Management Fees

  • ETFs charge annual fees (0.20%–1.00%), which can affect long-term gains.

2. Lack of Full Ownership

  • You don’t hold the actual coins, so you can’t use them for staking, yield farming, or DeFi.

3. Volatility

  • Crypto markets are still highly volatile. ETF prices can fluctuate rapidly.

4. Tracking Errors (Futures ETFs)

  • Futures-based ETFs often lag behind the spot price of the cryptocurrency.

💡 Why Crypto ETFs Matter in 2025

The launch and adoption of crypto ETFs signal mainstream validation of the crypto market.

  • Over $60 billion has poured into Bitcoin and Ethereum ETFs since early 2024.
  • Institutional players like BlackRock, Fidelity, and ARK Invest are leading issuers.
  • Spot Bitcoin ETFs helped propel BTC above $118,000 in July 2025.
  • Regulatory green lights from the SEC, MAS, and other regulators mark a shift in global crypto policy.

Crypto ETFs reduce barriers to entry and give traditional investors a safe, regulated way to participate in the digital economy.

đŸ€– How Token Metrics Helps You Analyze Crypto ETF Trends

As ETFs drive price action, tools like Token Metrics give you an edge by turning market noise into actionable intelligence.

đŸ”č Real-Time Bullish/Bearish Signals

Token Metrics' AI algorithm scans exchange inflows, ETF data, and sentiment to issue buy/sell signals for major cryptocurrencies like Bitcoin, Ethereum, XRP, and more.

đŸ”č Institutional Flow Tracking

Track ETF fund flows to understand where institutions are allocating capital—key for timing your own entries and exits.

đŸ”č Price Predictions and Trend Grades

AI-generated price predictions, trader grades, and investor scores help you assess risk before investing in ETF-driven rallies.

đŸ”č Portfolio Tracking

Token Metrics syncs with your wallet or brokerage to track crypto ETF exposure alongside your on-chain tokens.

By using Token Metrics, you’re not just following ETF trends—you’re staying ahead of them.

🔄 Popular Crypto ETFs in 2025

Here are some of the top-performing crypto ETFs currently available:

These ETFs are helping investors tap into the gains of crypto markets—without the complexity.

🧠 Final Thoughts

Crypto ETFs represent a pivotal shift in how digital assets are being embraced in traditional finance. They offer accessibility, regulatory clarity, and simplified crypto exposure for everyone from hedge funds to retail investors.

But smart investing goes beyond headlines. Platforms like Token Metrics help you:

  • Time entries and exits with AI-powered signals

  • Track ETF fund flows to gauge institutional momentum

  • Build conviction using on-chain data and predictive analytics

In 2025 and beyond, the winning strategy is clear: combine the safety of ETFs with the intelligence of Token Metrics.

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