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Token Metrics API

Free Crypto API: Build Smarter Crypto Apps at Zero Cost

Compare the best free crypto APIs for developers. Token Metrics offers real-time prices + AI trading signals free vs CoinGecko, CryptoCompare, and Glassnode. Perfect for prototyping trading bots and dashboards.
Sam Monac
6 min
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What Is a Free Crypto API?

A free crypto API gives developers access to cryptocurrency data without upfront costs. Think of it as a bridge between raw blockchain/market data and your application. APIs let you pull:

  • Real-time token prices and charts

  • Historical data for backtesting and research

  • Market cap, liquidity, and trading volumes

  • On-chain metrics such as wallet flows

  • AI-driven trading signals and predictive insights

Free tiers are invaluable for prototyping apps, dashboards, and bots. They let you validate ideas quickly before paying for higher throughput or advanced endpoints.

Why Developers Use Free Crypto APIs

Free crypto APIs aren’t just about saving money—they’re about learning fast and scaling smart:

  • Zero-Cost Entry – Start building MVPs without financial risk.

  • Rapid Prototyping – Test ideas like dashboards, bots, or AI agents quickly.

  • Market Exploration – Access broad coverage of tokens before committing.

  • Growth Path – Once demand grows, upgrade to premium tiers seamlessly.

📌 Tip: Use multiple free crypto APIs in parallel during early development. This helps you benchmark speed, reliability, and accuracy.

Key Features of the Token Metrics Free API

The Token Metrics free tier goes beyond basic price feeds by offering:

  • Real-Time Prices – Live data on Bitcoin, Ethereum, and thousands of tokens.

  • AI Trading Signals – Bull/Bear indicators that help power smarter strategies.

  • Secure Access – Encrypted endpoints with key-based authentication.

  • 30 Days of History – Enough to prototype backtests and analytics features.

Unlike many free crypto APIs, Token Metrics API provides both price data and intelligence, making it ideal for developers who want more than surface-level metrics.

Comparing Free Crypto APIs: Strengths & Trade-offs

  • CoinGecko & CoinMarketCap


    • Pros: Huge token coverage, great for charts and tickers.

    • Cons: Limited historical and no predictive analytics.

  • CryptoCompare


    • Pros: Rich historical tick-level data, good for backtesting.

    • Cons: Free tier limits depth and call volume.

  • Glassnode


    • Pros: Strong on-chain insights.

    • Cons: Many advanced datasets require paid access.

  • Alchemy & Infura


    • Pros: Node-level blockchain access for dApp builders.

    • Cons: Not designed for trading or analytics—raw blockchain data only.

  • Token Metrics


    • Pros: Real-time prices, AI signals, and on-chain analytics in one free tier.

    • Cons: Rate limits apply (upgrade available for higher throughput).

Popular Use Cases: From Bots to Dashboards

  • AI Crypto Trading Bots – Start testing automation using live prices and bull/bear signals.

  • Crypto Dashboards – Aggregate token ratings, prices, and trends for end users.

  • Research Tools – Run small-scale backtests with 30-day historical data.

  • Learning Projects – Ideal for students or developers exploring crypto APIs.

📌 Real-world example: Many developers use the Token Metrics free tier to prototype bots that later scale into production with paid plans.

Best Practices for Using Free Crypto APIs

  1. Start with Prototypes – Test multiple free APIs to compare reliability and latency.

  2. Track Rate Limits – Free tiers often throttle requests (e.g., 5 req/min at Token Metrics).

  3. Combine Data Sources – Use Token Metrics for signals + CoinGecko for broad coverage.

  4. Secure Keys – Treat even free API keys as sensitive credentials.

  5. Prepare to Upgrade – Build flexible code so you can switch tiers or providers easily.

Beyond Token Metrics: Other Free Resources Worth Knowing

  • DefiLlama API – Free coverage of DeFi protocols, yields, and TVL.

  • Dune Analytics – Query blockchain data with SQL for free.

  • TradingView Widgets – Embed charts directly into dashboards.

  • Santiment API – Free endpoints for social/sentiment analytics.

These can complement Token Metrics. For example, you could combine Token Metrics signals + DefiLlama DeFi data + TradingView charts into one unified dashboard.

How to Get Started With the Token Metrics Free API

  1. Sign Up for a free Token Metrics account.

  2. Generate Your API Key instantly from your dashboard.

  3. Check the Docs for endpoints, examples, and code snippets.

  4. Prototype Your App with real-time prices and signals.

  5. Upgrade When Ready to unlock larger datasets and more endpoints.

👉 Grab Your Free Token Metrics API Key

FAQs About Free Crypto APIs

What can I access with Token Metrics Free API?
Live token prices, bull/bear trading signals, and 30 days of historical data.

Are free APIs reliable for production?
Not recommended—free tiers are best for prototypes. Paid tiers ensure reliability and scale.

What are the rate limits?
500 calls/month, 5 requests/minute, and 1 WebSocket connection.

Can I use the free API for trading bots?
Yes—ideal for prototyping. For production-level bots, upgrade for more throughput.

Scaling Beyond Free: Paid Plans & X.402

When your project outgrows free limits, Token Metrics offers flexible upgrades:

  • Pay-Per-Call (X.402) – As low as $0.017 per call, unlimited usage, no commitment.

  • Advanced Plan ($999.99/year) – 20,000 calls/month, indices & indicators, 3 WebSockets.

  • Premium Plan ($1,999.99/year) – 100,000 calls/month, AI agent + reports, 3 years of history.

With up to 35% off using TMAI tokens, scaling is cost-efficient.

📌 Why X.402 matters: Instead of committing upfront, you can grow gradually by paying per call—perfect for startups and side projects.

Build Smarter, Scale Easier

Free APIs help you start quickly and learn fast. Token Metrics gives you more than prices—it adds AI-powered signals and intelligence. Combine it with other free APIs, and you’ll have a toolkit that’s powerful enough for experimentation and flexible enough to scale into production.

👉 Create Your Free Token Metrics Account and Start Building

‍

Build Smarter Crypto Apps &
AI Agents in Minutes, Not Months
Real-time prices, trading signals, and on-chain insights all from one powerful API.
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About Token Metrics
Token Metrics: AI-powered crypto research and ratings platform. We help investors make smarter decisions with unbiased Token Metrics Ratings, on-chain analytics, and editor-curated “Top 10” guides. Our platform distills thousands of data points into clear scores, trends, and alerts you can act on.
30 Employees
analysts, data scientists, and crypto engineers
Daily Briefings
concise market insights and “Top Picks”
Transparent & Compliant
Sponsored ≠ Ratings; research remains independent
Want Smarter Crypto Picks—Free?
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Token Metrics Team
Token Metrics Team

Recent Posts

Crypto Basics

Bullish in Crypto: Definition, Meaning, and Explanation

Token Metrics Team
4 minutes

In the world of cryptocurrency, the terms "bullish" and "bearish" are commonly used to describe an investor's confidence in the potential growth of a particular crypto asset. But what do these terms really mean, and how do they apply to the crypto market? In this article, we will provide a comprehensive explanation of these terms, including the concept of a "bull run" and how it applies to both cryptocurrencies and non-fungible tokens (NFTs).

What Does Bullish Mean in Crypto?

The terms "bullish" and "bearish" are commonly used in the financial market to describe the confidence an investor has in the potential growth of a financial asset. In the context of the crypto market, a "bullish" investor is one who believes that a particular cryptocurrency or non-fungible token (NFT) will rise in value. This confidence is often seen when the market is experiencing growth and gains are being made.

What Is Bull Run

A "bull run" in the crypto market is a period of time during which there is high demand for cryptocurrencies and NFTs, leading to an increase in prices. This increase is driven by confidence in the market, as investors are more likely to buy when they believe prices will continue to rise. A bull run typically includes an increase in the value of well-known cryptocurrencies such as Bitcoin, Ethereum, Binance, and Solana, as these have the highest market capitalizations.

Bullish On NFTs

The concept of a "bull market" also applies to the market for non-fungible tokens (NFTs). In this context, a bull market is characterized by high demand for NFTs, which drives up their prices. Factors that can lead to increased demand for NFTs include strong marketing and community support from the development team, as well as the utility and scarcity of the NFTs. A collector, trader, or creator may feel bullish about a particular NFT project if they believe it has strong potential for growth. This bullish sentiment can lead to higher prices for the NFTs and a decrease in market supply.

Final Thoughts

It is important for investors to understand the terminology used in the crypto market in order to make informed decisions about their investments. The terms "bullish" and "bearish" are commonly used to describe confidence in the potential growth of a crypto asset. A "bull run" is a period of time during which there is high demand for cryptocurrencies and NFTs, leading to an increase in prices. In the NFT space, a bull market is characterized by high demand for NFTs, which drives up their prices.

Crypto Basics

What are NFTs? NFT Art Explained | Future of NFTs

Token Metrics Team
6 minutes

You may have heard of CryptoPunks, Bored Ape Yacht Club, and VeeFriends, but you may not understand what they are. These names may sound like random combinations of words, but they actually represent some of the most valuable non-fungible token (NFT) projects that have emerged in the past few years.

The world of crypto art and NFTs may appear complex and mysterious, with a mix of celebrities, influencers, and internet experts. But it's not as confusing as it seems. Let's start from the beginning.

What Is An NFT?

Nearly all crypto art that has been introduced to the market has been done so through the minting of non-fungible tokens (NFTs). NFTs are digital assets that have verified proof of ownership. While "fungible tokens" like the US dollar can be easily traded (like exchanging 4 quarters for a dollar), each NFT is unique and cannot be easily traded. For example, imagine a sketch of "Starry Night" by Vincent Van Gogh that has been authenticated by a fine art appraiser as an original. This sketch would be non-fungible because you could not easily exchange it for, say, an original sketch by Leonardo da Vinci. This concept is easy to understand with tangible items like art pieces or collectible cards, but when digital assets can range from a celebrity tweet to an iconic meme to a picture of a pimped out animated ape, it may be confusing.

How Can We Ensure Unique Authenticity?

This is where NFTs enter the scene. Say you are a graphic design artist who just finished your newest 1-of-1 piece of work and you want to sell it as an NFT. Whoever purchases this piece would not only receive the artwork but they would also receive a “digital receipt” that proves that this exact piece is original, unique and authentic.

“But What If I Just Screenshot This Digital Artwork? Wouldn’t I Technically Own the Piece as Well?”

This is the first question that many have mockingly asked on social media and internet forums. The easy answer: yes, you can screenshot practically all digital artwork, but no, that does not mean you own it.

For example, millions of people swarm into the Louvre every year, waiting patiently amidst a giddy crowd, just to capture a picture of the priceless Mona Lisa. Obviously, a picture of the Mona Lisa saved on your iPhone camera roll does not mean that you own that painting.

NFTs work the same way.

Just as the Louvre paid millions of dollars to own, maintain, and display the Mona Lisa in their museum, NFT buyers do the same. However, the main difference is that instead of paying dollars to house the art in a fancy museum, they are paying with cryptocurrency and housing their art in a virtual showcase, so to speak.

This is the basis for how NFTs, cryptocurrency, and blockchain technology are establishing a new and lucrative market for digital art and artists.

The Art of Being Digital

In a 2021 interview, Gary Vaynerchuk (founder of Vayner Media and creator of VeeFriends) made the following statement regarding NFTs. The interviewer remarks on the tangibility of NFTs stating, "the digital aspect, like, you can't see it" — Gary jumps in:

"Well, you can't see a blue check on Instagram? I don't walk around the world with a blue check tattooed on my forehead, but everybody sees it. You can't see my 9 million followers on Instagram, or can you? I would argue the reverse. I would argue that people can't see most of the fancy things you have in your house; that people can see more digital than real life."

And he's onto something, and I'd like to call that something "The Art of Being Digital". In our highly digitized world, our online outreach and interconnectivity is wildly amplified. Gary Vee currently has 9.9 million followers on Instagram — but without access to the internet — he has no way of interacting with that community and tapping into the true power of those 9.9 million people.

Why Do NFTs Have Value?

The value of an NFT is determined by the collective intentionality of those who are willing to buy and sell them. In other words, the value of an NFT is based on what people are willing to pay for it. This is similar to the way that the value of traditional art is determined by the market, with the value being based on factors such as the artist's fame and the rarity of the work.

The Tom Brady example illustrates this idea. On the surface, it might seem strange that someone would pay $430k for a digital picture of a cartoon ape. However, if we consider the fact that the buyer was Tom Brady and the seller was the well-known digital artist Trevor Jones, it becomes clearer that the value of the NFT was determined by the collective intentionality of those involved in the transaction.

Furthermore, the digital art of NFTs offers more than just a digital file and a high price tag. NFTs provide the ability for digital artists to monetize their work and for collectors to own and trade unique digital items. This opens up new opportunities for artists and collectors alike, and has led to the growth of a vibrant and exciting market for NFTs.

Join The Club

Celebrities such as Tom Brady, Post Malone, Steph Curry, and Jimmy Fallon have been buying Bored Ape NFTs. Bored Ape NFTs were introduced by the Bored Ape Yacht Club (BAYC) in April 2021 at a price of 0.08 Ethereum (ETH) each, or about $190 at the time. Since then, the price of Bored Apes has increased significantly, yielding substantial returns for early investors.

In addition to the potential for financial gain, buying a Bored Ape NFT also grants the buyer access to the BAYC community. This includes access to the BAYC Discord, where buyers can connect with other members of the club, including celebrities, and collaborate on NFT-related projects. BAYC also gives members priority access to future NFT drops, allowing them to expand their collections.

Minting and selling NFTs can also be highly lucrative for those who create their own NFT projects. This is another reason why celebrities and others may be interested in the NFT market. Creating and selling NFTs allows artists and other creators to monetize their digital work and gives collectors the opportunity to own unique digital items. The growth of the NFT market has created new opportunities for both artists and collectors, leading to a vibrant and exciting market for NFTs.

Blockchain, Smart Contracts, and Secondary Sales

Blockchain technology is used to record the conversion of traditional currency into cryptocurrency, such as Ethereum (ETH), in the NFT market. This transaction is recorded on the blockchain as public information that is easily accessible to anyone who wants to view it. This ensures transparency and helps to prevent fraud in the NFT market.

Smart contracts are programs stored on the blockchain that allow NFT creators to stipulate the conditions of resale. For example, a creator could draft a smart contract that allows them to earn a 10% commission on any subsequent resales of their NFT. This allows creators to continue to benefit from the success of their work, even after the initial sale.

Smart contracts also facilitate secondary sales in the NFT market. When the value of an NFT increases, the smart contract associated with that NFT can automatically distribute any profits from the sale to the relevant parties, such as the creator or the NFT platform. For example, if the value of Tom Brady's Bored Ape NFT increased from $430k to $530k, the smart contract could automatically distribute the $100k profit to the Bored Ape Yacht Club, if that was stipulated in the contract.

This use of smart contracts helps to ensure that all parties are fairly compensated for their contributions to the NFT market, and it allows for efficient and transparent transactions without the need for intermediaries.

The Future Of Crypto-Art

Grammy-winning artist Tyler, the Creator recently questioned the value of NFTs, stating that most of the examples he has seen are not "beautiful art." While art is subjective and many NFTs are AI-generated, there are still many ways in which NFTs can offer value in the real world.

First, NFTs can be used to represent tangible experiences and achievements. Instead of framing a concert ticket or a season pass, these items could be represented as NFTs, allowing individuals to proudly display their experiences and achievements in the digital world. This could be especially beneficial for VIP experiences and exclusive memberships.

Second, NFTs can provide a level of authenticity and scarcity that cannot be achieved with physical items. This is especially useful for limited edition items and collectibles, which can be authenticated and traded easily on the blockchain.

Third, the use of smart contracts can ensure that all parties are fairly compensated for their contributions to the NFT market. This allows for transparent and efficient transactions without the need for intermediaries.

Overall, while some may dismiss NFTs as "silly little digital artworks," they have the potential to reshape not just the art world, but the world itself.

Crypto Basics

What is WETH: Wrapped Ethereum? [Answered]

Token Metrics Team
4 minutes

If you are wondering what is WETH, short for Wrapped Ethereum, this is the place to be.

Cryptocurrencies have gained a lot of popularity in recent years, with many investors looking to invest in the digital assets. However, the use of these cryptocurrencies on decentralized applications (dApps) can be limited due to compatibility issues. This is where wrapped tokens come in. Wrapped tokens are tokenized versions of cryptocurrencies that can be pegged to the value of the original coin and used on different blockchain networks. In this article, we will explain what WETH is and how it works.

What is WETH or Wrapped Ethereum?

WETH is the abbreviation for Wrapped Ether, which is a tokenized version of the cryptocurrency Ether (ETH) that is pegged to its value. This means that the value of WETH remains the same as ETH, but it allows for increased interoperability between Ethereum and other blockchain networks.

How Does Wrapped Ethereum Work?

In order to create Wrapped Ethereum, a custodian must hold the collateral (in this case, ETH). This custodian can be a merchant, multi-signature wallet, or a smart contract. To create WETH, an investor sends their ETH to the custodian, and in return, a wrapped version of the ETH is created. This process is similar to how stablecoins are created, as they are essentially "wrapped USD" that can be redeemed for fiat dollars at any time.

What Makes Wrapped Ethereum Unique?

Wrapped tokens like WETH allow investors to hold onto their ETH while using it on other blockchain networks. This increases liquidity and capital efficiency, as investors can wrap their assets and deploy them on other chains. Wrapping Ether can also reduce transaction times and fees, as Ethereum often suffers from high gas fees. However, using wrapped tokens also means relying on a custodian and taking on additional risks.

Are ETH and WETH Different?

Yes, ETH and WETH are different. ETH is the original cryptocurrency, while WETH is a wrapped version of ETH that is ERC-20 compatible. This means that it can be easily used on a wide range of decentralized applications (dApps), but it is equivalent to ETH in terms of value. Investors may need to convert their ETH to WETH in order to use certain dApps.

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