Research

Top Free APIs Every Developer Should Know in 2024

Discover the best free-to-use APIs for crypto, AI, and data apps. See which trusted APIs developers rely on for robust features, reliability, and easy integration.
Token Metrics Team
5
MIN

APIs are the silent workhorses powering today’s most innovative software. Whether you’re a crypto enthusiast automating portfolio analysis, or a web developer looking to enrich your app with real-time data, the right free API can supercharge your project—and your productivity. But with thousands out there, which free APIs truly stand out for reliability, ease of use, and breadth of features?

Why Free APIs Matter for Developers and Innovators

APIs—Application Programming Interfaces—allow applications to seamlessly interact, share insights, and build on each other's strengths. The best free-to-use APIs democratize access to powerful datasets, functionalities, and market signals. For crypto, AI, fintech, or simply creative digital projects, high-quality APIs can:

  • Accelerate product development with ready-made data and processing tools
  • Enable experiments in new tech areas without initial investment
  • Foster community-driven innovation thanks to open documentation and easy onboarding

However, not all free APIs are created equal. Some offer limited usage tiers, outdated data, or spotty reliability. That’s why informed selection is crucial, especially for mission-critical apps.

Top Free APIs for Cryptocurrency and Blockchain Projects

The crypto landscape thrives on transparency and timely data. For enthusiasts building bots, dashboards, or research tools, these free APIs consistently earn praise:

  • CoinGecko API: Delivers comprehensive token prices, volumes, and market data. Free tier includes generous rate limits and supports thousands of assets.
  • CoinMarketCap Public API: Offers price feeds and historical data for cryptocurrencies, ideal for analysts and monitoring tools.
  • Etherscan API: The go-to source for Ethereum blockchain explorers, enabling developers to fetch address balances, smart contract source, and token transactions for free.
  • Glassnode API (Free Tier): On-chain metrics and indicators, including supply activity and network health, are freely accessible for non-commercial use.

These APIs are often foundational building blocks for portfolio trackers, on-chain analytics, and even education platforms. Crucially, they’re maintained, well-documented, and support broad application ranges without requiring payment—or personal information—at the entry level.

Best Free APIs Across Data, AI, and Web Development

If your project stretches beyond crypto, the open web is full of powerful (yet freely accessible) APIs for various domains:

  1. OpenWeatherMap API: Real-time and forecast weather data for any global location. Great for travel, logistics, and even DeFi insurance products.
  2. NewsAPI: Aggregates global headlines and breaking news. Many developers use it for sentiment dashboards, trend-following, or daily newsletters.
  3. OpenAI API (trial/limited free tier): Enables natural language understanding, chatbots, and text processing. Developers can access some GPT models for experimentation on a free plan.
  4. RapidAPI Hub: A directory hosting hundreds of free-to-use APIs in every possible category—from sports to sentiment analysis. RapidAPI offers unified onboarding and monitoring.
  5. Public-APIs (GitHub Community List): An open-source, crowd-curated list of categorized free APIs, kept up to date for AI, datasets, image processing, and more.

These tools let you build everything from machine learning prototypes to hobbyist weather notifiers. Carefully review usage limits and (where relevant) data privacy arrangements as you scale your innovation.

How to Choose and Integrate Free APIs Securely

Not every free API is equally reliable or secure. Situations to consider include:

  • Data Accuracy and Uptime: Ensure the provider offers a clear SLA or uptime history, especially for finance or real-time apps.
  • Privacy: Favor APIs that don’t require sensitive personal data unless absolutely necessary.
  • API Limits and Scaling: Free tiers are often rate-limited. Consider future upgrades and monitor usage to avoid service interruptions.
  • Documentation and Community: Well-documented APIs, ideally with samples and open forums, accelerate integration and reduce confusion.

When integrating, secure your keys in environment variables, use HTTPS endpoints, and avoid exposing credentials in public sources. Always plan for error handling and fail-safes.

The Growing Role of Free APIs in AI and Analytics

The explosion of AI-generated insights and predictive analytics owes much to accessible APIs. With free endpoints for data labeling, model inference, and sentiment tracking, even small development teams can launch powerful, AI-enhanced products. Projects like Hugging Face’s free models hub or the OpenAI playground democratize once-complex capabilities, unlocking new digital frontiers for research and public good.

For crypto analysis, AI-backed APIs—like those from Token Metrics—combine quantitative techniques and machine learning to highlight actionable trends and on-chain activity. As free API ecosystems expand, expect an even richer toolbox for developers at every skill level.

Build Smarter Crypto Apps & AI Agents with Token Metrics

Token Metrics provides real-time prices, trading signals, and on-chain insights all from one powerful API. Grab a Free API Key

What is an API and why are they essential in crypto or AI?

APIs let different software systems communicate and share data or services. In crypto, APIs deliver live price data, transaction histories, and on-chain analytics. In AI, APIs allow access to model inference, data labeling, and natural language processing, lowering barriers for developers and researchers.

Are free APIs truly reliable for production use?

Many free APIs maintain high uptime and data accuracy, especially those from reputable organizations. However, they may have stricter rate limits, fewer support options, or evolving terms. For mission-critical operations, always implement redundancy and review official service level commitments.

Which are the best free APIs for cryptocurrency analysis?

Popular options include CoinGecko, CoinMarketCap, and Etherscan for price and blockchain data. For AI-driven insights, platforms like Token Metrics provide actionable intelligence with robust free tiers.

How do I keep my API keys and data secure?

Never hardcode keys in public repos or client-side code. Use secure storage (environment variables or vaults), enforce HTTPS, rotate keys regularly, and monitor API access logs to identify anomalies.

What should I check before integrating any free API?

Review documentation, data freshness, rate limits, provider reputation, privacy compliance, and supported SDKs. Test endpoints in your dev environment and plan for graceful error handling to ensure resilience.

Disclaimer

This article is for informational purposes only and does not constitute financial, investment, or legal advice. Always perform due diligence when evaluating APIs, tools, or digital assets. No endorsement is implied. Third-party API providers may change terms at any time; verify details before production use.

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Token Metrics Team
Token Metrics Team

Recent Posts

Research

How Do I Keep My Cryptocurrency Safe?

Token Metrics Team
8 min
MIN

The cryptocurrency market has created life-changing wealth for millions, but it has also attracted hackers, scammers, and bad actors. From exchange hacks to phishing scams and rug pulls, billions of dollars in crypto have been lost due to poor security practices.

If you’re serious about trading or investing in crypto, one of your top priorities should be keeping your cryptocurrency safe. In this guide, we’ll walk through the biggest risks to your crypto security, best practices to protect your assets, and how Token Metrics can help you make informed, safe decisions when navigating the crypto market.

Why Is Cryptocurrency Security So Important?

Unlike a traditional bank account, cryptocurrency transactions are irreversible. If your funds are stolen, there’s usually no way to recover them.

  • No centralized authority: There’s no bank to call for refunds.
  • Pseudonymous transactions: It’s nearly impossible to trace funds once they’re moved.
  • High-value targets: Hackers actively target crypto investors due to the potential for large payoffs.

This means you are your own bank—and you’re responsible for protecting your funds.

Common Threats to Your Cryptocurrency

Before learning how to protect your crypto, you need to know what you’re up against:

1. Exchange Hacks

Crypto exchanges are frequent targets for hackers. Even top-tier exchanges like Mt. Gox and FTX have experienced devastating losses.

2. Phishing Attacks

Scammers use fake websites, emails, or social media accounts to trick you into revealing your private keys or login credentials.

3. Malware & Keyloggers

Cybercriminals install malicious software on your devices to steal passwords and seed phrases.

4. Rug Pulls & Scams

Fraudulent projects lure investors with promises of high returns, then disappear with the funds.

5. Human Error

Lost passwords, mishandled private keys, or accidental transfers can lead to permanent loss of funds.

How to Keep Your Cryptocurrency Safe

Here’s a step-by-step approach to safeguarding your crypto:

1. Use a Secure Wallet

Hardware Wallets:

  • The safest option for long-term storage.
  • Devices like Ledger or Trezor keep your private keys offline, out of reach of hackers.

Software Wallets:

  • Convenient for active trading but more vulnerable to attacks.
  • Use reputable wallets like MetaMask or Trust Wallet and enable strong security features.

Pro Tip: Use a hardware wallet for long-term holdings and a software wallet for small, active trading balances.

2. Enable Two-Factor Authentication (2FA)

Always enable 2FA on your exchange accounts, wallets, and email addresses.

  • Use Google Authenticator or Authy, not SMS-based 2FA, which is susceptible to SIM swaps.

3. Beware of Phishing & Fake Websites

  • Double-check URLs before logging into exchanges or wallets.
  • Never click links from suspicious emails or DMs.
  • Bookmark the official websites of your exchanges and platforms.

4. Keep Your Seed Phrase Offline

Your wallet’s seed phrase is the master key to your funds.

  • Write it down on paper and store it securely (safe, vault).
  • Avoid storing it in digital form (cloud storage, photos).
  • Consider splitting the phrase into parts and storing them in separate locations.

5. Research Projects Before Investing

Many scams and rug pulls target uninformed investors chasing hype.

How Token Metrics Helps:

  • Use AI-powered Investor Grades to assess projects for long-term viability.
  • Leverage Moonshot Finder to discover vetted early-stage tokens with real growth potential—not scams.

6. Diversify Your Storage

Don’t keep all your crypto in one place.

  • Use multiple wallets for different purposes (trading vs. holding).
  • Spread funds across hardware, software, and exchange wallets.

7. Stay Updated on Threats

The crypto landscape changes fast.

  • Follow credible crypto news platforms.
  • Monitor regulatory updates and security alerts.
  • Use Token Metrics to stay ahead of market narratives and avoid projects flagged as high-risk.

How Token Metrics Helps You Stay Secure

While Token Metrics isn’t a wallet or exchange, it’s a powerful AI-powered platform designed to help you make safer investment decisions.

1. AI-Powered Risk Analysis

Token Metrics uses AI-driven evaluations to score projects, helping you avoid high-risk tokens and scam projects.

2. Investor & Trader Grades

Our proprietary grading system helps you quickly identify safe, high-quality assets for both short-term trading and long-term holding.

3. Moonshot Finder

Interested in low-cap tokens? The Moonshot Finder helps you spot legitimate early-stage projects before they pump—without falling into scams.

4. Narrative & Market Tracking

Stay ahead of emerging narratives and security concerns with Token Metrics’ real-time AI-driven analysis, helping you dodge risky trends.

Practical Security Checklist for Every Crypto Holder

  1. Use a hardware wallet for long-term holdings.
  2. Enable 2FA on all accounts—never rely on SMS-based security.
  3. Store seed phrases offline and securely.
  4. Avoid suspicious links and verify all URLs.
  5. Research every project using platforms like Token Metrics.
  6. Diversify storage across multiple wallets.
  7. Stay informed about new threats and market risks.

Final Thoughts

So, how do you keep your cryptocurrency safe? It comes down to strong storage practices, personal vigilance, and making informed investment decisions.

While hardware wallets and 2FA secure your assets, knowing where to invest is just as important. That’s where Token Metrics comes in—using AI-powered analysis to help you avoid scams, choose safe projects, and trade with confidence.

In crypto, you are your own bank—so take your security seriously. And with Token Metrics guiding your decisions, you can navigate this high-risk market safely and profitably.

Research

What Are Trading Fees and How Do They Work?

Token Metrics Team
8 min
MIN

If you’ve ever bought or sold cryptocurrency, you’ve likely noticed that exchanges charge trading fees. While these fees may seem small at first glance, they can add up significantly over time, especially for frequent traders.

Understanding how trading fees work is essential for maximizing your profits and choosing the right platform and strategy. In this guide, we’ll explain what trading fees are, how they’re calculated, the different types of fees, and how Token Metrics can help you minimize costs while optimizing your trades.

What Are Trading Fees?

Trading fees are charges imposed by cryptocurrency exchanges whenever you execute a trade—whether you’re buying, selling, or swapping digital assets.

  • Purpose:

    • They compensate exchanges for providing liquidity, security, and order-matching services.
    • They discourage spam orders that could overload the exchange.

Example:
If you buy $1,000 worth of Bitcoin with a 0.1% trading fee, you’ll pay $1 in fees for that transaction.

How Are Trading Fees Calculated?

Most crypto exchanges calculate fees based on:

  1. Trade Value (Percentage):

    • The most common model.
    • Fees are a percentage of the total trade amount (e.g., 0.1% per trade).

  2. Flat Fees:

    • Some platforms charge a fixed fee per trade, regardless of trade size.

  3. Tiered Fee Structures:

    • Frequent traders often benefit from lower fees when they reach certain monthly trading volumes.

Maker vs. Taker Fees

Many exchanges use a maker-taker model to incentivize liquidity:

  • Maker Fees:

    • You pay a lower fee (or sometimes nothing) when you add liquidity by placing a limit order that isn’t immediately matched.

  • Taker Fees:

    • You pay a higher fee when you remove liquidity by placing a market order that is filled instantly.

Example:
On Binance, makers might pay 0.08%, while takers pay 0.1%.

Types of Crypto Trading Fees

When trading crypto, you’ll encounter more than just trading fees:

1. Trading (Transaction) Fees

  • Charged when buying or selling crypto.
  • Often range from 0.05%–0.5% depending on the exchange.

2. Deposit Fees

  • Some exchanges charge when funding accounts via credit card, PayPal, or bank transfers.
  • Crypto deposits are typically free.

3. Withdrawal Fees

  • Charged when moving funds off the exchange.
  • Often fixed per withdrawal (e.g., 0.0005 BTC).

4. Network (Gas) Fees

  • Separate from exchange fees, paid to blockchain validators.
  • Ethereum and other networks can have high gas fees during peak demand.

Why Do Trading Fees Matter?

Even small fees can significantly impact your profits, especially if you trade often.

Example:

  • A day trader making 50 trades/month with a 0.1% fee per trade on $1,000 positions will pay $50/month in fees.
  • Over a year, that’s $600 lost to fees—before considering withdrawal or gas costs.

This is why reducing fees is crucial for active traders.

How to Minimize Trading Fees

1. Use Low-Fee Exchanges

Compare platforms—Binance, Bybit, and Kraken often offer competitive rates for high-volume traders.

2. Increase Your Trading Volume

Many exchanges lower fees as your monthly trading volume increases.

3. Use Limit Orders

Save on fees by acting as a maker instead of a taker whenever possible.

4. Pay with Exchange Tokens

Some exchanges offer discounts when fees are paid with their native token (e.g., BNB on Binance).

5. Optimize Your Trading Strategy with AI

Instead of making dozens of small trades, use data-driven insights from Token Metrics to make high-probability trades—reducing overall fee impact.

How Token Metrics Helps You Save on Fees

Token Metrics isn’t an exchange—it’s an AI-powered crypto research and trading platform designed to maximize your profits.

Here’s how it helps with trading fees:

1. AI-Powered Trade Optimization

Token Metrics provides bullish/bearish trading signals based on 80+ technical indicators, helping you enter fewer but higher-quality trades—minimizing unnecessary fees.

2. Trader & Investor Grades

Our proprietary grading system helps you identify top-performing cryptos, reducing guesswork and avoiding costly trial-and-error trading.

3. AI-Managed Indices

Instead of manually rebalancing portfolios (and paying multiple trading fees), use Token Metrics AI-driven crypto indices, which rebalance intelligently while keeping transaction costs low.

4. Narrative Tracking

Our AI detects emerging crypto narratives early, helping you position yourself before the market gets crowded—reducing the need for excessive short-term trading.

Practical Example: Using Token Metrics to Reduce Fees

Imagine you’re trading altcoins manually and make 20 trades/month.

  • At 0.2% per trade on $1,000 positions, you pay $40/month in fees.
  • With Token Metrics AI signals, you cut this down to 8 high-probability trades per month—reducing your fees by 60% while increasing win rates.

This is how data-driven trading saves both money and stress.

Final Thoughts

So, what are trading fees and how do they work? They’re the charges exchanges take for facilitating trades, withdrawals, and transactions—and while they may seem small, they can eat into your profits quickly.

The good news? You can minimize trading fees with the right strategies—and Token Metrics can help.

By providing AI-powered trading signals, long-term Investor Grades, and automated crypto indices, Token Metrics helps you reduce unnecessary trades, make smarter decisions, and maximize your returns—all while minimizing the impact of trading fees.

Whether you’re a beginner or advanced trader, using Token Metrics means trading smarter, not harder.

Research

Should I Use Leverage When Trading Crypto?

Token Metrics Team
8 min
MIN

Leverage trading has become a hot topic in the crypto world. Many traders are attracted by the promise of amplified profits—but fail to realize it also magnifies losses. If you’ve been wondering, “Should I use leverage when trading crypto?” the short answer is: only if you fully understand the risks and have a solid strategy.

In this guide, we’ll break down what leverage trading is, how it works, its pros and cons, and how AI-powered tools like Token Metrics can help you make smarter decisions when trading with leverage.

What Is Leverage Trading in Crypto?

Leverage trading lets you borrow funds from an exchange to increase your position size, allowing you to control more capital than you actually own.

For example:

  • If you have $1,000 and use 10x leverage, you’re trading with $10,000.
  • A 10% price increase can give you a 100% profit on your original investment.
  • But a 10% price drop could wipe out your position completely.

Popular platforms like Binance, Bybit, and OKX offer leverage levels from 2x to 125x for certain assets.

Pros of Leverage Trading

Leverage isn’t all bad. When used responsibly, it offers several benefits:

1. Higher Profit Potential

Even small price movements can generate significant returns when using leverage.

2. Portfolio Efficiency

Traders can free up capital for other positions while maintaining large exposure in a leveraged trade.

3. Opportunities in Bear Markets

Leverage allows for short selling, enabling you to profit when prices go down.

Cons of Leverage Trading

The same factors that make leverage attractive also make it high-risk:

1. Amplified Losses

Just as leverage magnifies profits, it magnifies losses. A minor price drop could liquidate your entire position.

2. Liquidation Risk

When your collateral falls below a certain threshold, the exchange automatically closes your position, locking in your losses.

3. Emotional Stress

Leverage trading is fast-paced and stressful, often leading to panic selling or revenge trading after losses.

Should Beginners Use Leverage?

No.
If you’re new to trading, avoid leverage until you have:

  • A proven strategy with consistent results in spot trading.
  • Strong risk management skills (e.g., using stop-loss orders).
  • The ability to stay disciplined under pressure.

For beginners, leveraged trading can be a fast track to losing your capital.

When Does It Make Sense to Use Leverage?

For experienced traders, leverage can make sense when:

  • You’re hedging your portfolio against downside risk.
  • You have high conviction in a trade and want to maximize gains.
  • You’re trading high-liquidity assets like BTC or ETH with well-defined stop-losses.

How Token Metrics Helps You Trade Smarter with Leverage

Leverage trading requires precision, and that’s where Token Metrics gives you an edge.

1. AI-Powered Bullish & Bearish Signals

Identify high-probability trades with real-time AI signals based on 80+ technical indicators. This helps you avoid entering positions blindly.

2. Trader & Investor Grades

Use Trader Grades for short-term trading opportunities and Investor Grades for long-term positions—helping you decide when to scale up or reduce leverage.

3. Risk Assessment Tools

Token Metrics evaluates crypto projects and market trends to reduce exposure to high-risk assets—a must for leveraged positions.

4. AI-Driven Indices

Don’t want to trade manually? Use our AI-managed crypto indices to gain diversified exposure without taking unnecessary leveraged risks.

5. Narrative Detection

Our AI identifies emerging narratives before they hit mainstream attention, giving you a strategic edge in timing trades—crucial when using leverage.

Best Practices for Using Leverage in Crypto

If you decide to use leverage, follow these rules:

  1. Start Small: Use low leverage (2x–3x) instead of going all in at 20x or 50x.
  2. Set Stop-Loss Orders: Always predetermine your maximum loss tolerance.
  3. Trade Liquid Assets: Stick to high-volume coins like BTC and ETH to avoid slippage.
  4. Don’t Overtrade: Only use leverage on trades with strong conviction and proper analysis.
  5. Use AI Tools: Let Token Metrics guide your entries and exits with data-driven insights.

Why Overleveraging Is Dangerous

Many traders lose money by overleveraging, which leads to:

  • Margin calls and forced liquidations.
  • Revenge trading, where losses push traders into reckless decisions.
  • Complete portfolio wipeouts from one bad trade.

Pro Tip: Only trade with leverage on funds you can afford to lose.

Final Thoughts

So, should you use leverage when trading crypto?

For beginners, the answer is no—focus on mastering spot trading first. For experienced traders, leverage can be a powerful tool when used with strict risk management and data-driven insights.

That’s where Token Metrics makes a difference. With AI-powered trading signals, real-time risk analysis, and narrative tracking, Token Metrics helps you trade smarter, reduce emotional mistakes, and optimize your leverage strategy.

Leverage can make you or break you—so don’t go in blind. Use Token Metrics to guide your trades and stay ahead of the market.

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