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.

Build Smarter Crypto Apps & AI Agents with Token Metrics

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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

Crypto Basics

CoinMarketCap API Overview - Top Features, Endpoints and Alternatives

Token Metrics Team
6 Minutes
MIN

CoinMarketCap is one of the most popular cryptocurrency data websites, founded by Brandon Chez in May 2013 and acquired by Binance Capital Mgmt in April 2020.

It provides information about the current prices, market capitalizations, trading volumes, and other key metrics of thousands of cryptocurrencies. Some of the key products offered by CoinMarketCap include price tracking tools, portfolio tracking, cryptocurrency education, crypto API, etc

Coinmarketcap API Overview

The CoinMarketCap provides a range of data solutions through its API (Application Programming Interface) services for developers to access real-time cryptocurrency market data. Developers can get variety of data from its API, such as, Price and Market Data, Historical Crypto Data, Exchange data, Global Metrics and more

The CoinMarketCap API allows developers to retrieve this data programmatically, enabling them to build applications and services that integrate with the cryptocurrency market.

The crypto data APIs are widely used by developers, traders, and analysts to build applications, automate trading strategies, and analyze cryptocurrency markets.

How does the CoinMarketCap API work?

The CoinMarketCap API is a web-based API that provides developers with access to real-time and historical cryptocurrency market data. Here is a brief overview of how the CoinMarketCap API works:

Sign up for an API key: To use the CoinMarketCap API, developers need to sign up for an API key, which they can obtain by creating an account on the CoinMarketCap developer portal.

Once developers have obtained their API key, they can get data from CoinMarketCap API endpoints using their programming language of choice. The API supports a variety of programming languages, including Python, Node.js, Java, and PHP.

Retrieve data: The CoinMarketCap API provides a range of endpoints that developers can use to retrieve data on the current prices, market capitalizations, trading volumes, and other metrics of cryptocurrencies. Developers can choose to retrieve data for all cryptocurrencies or specific cryptocurrencies, and they can also retrieve historical data.

Process data: Once developers have retrieved the data they need from the API, they can process it and use it in their applications or services. For example, they might use the data to build a cryptocurrency price tracker or to analyze market trends.

Manage API usage: To ensure that developers are not overusing the API, CoinMarketCap sets rate limits on API requests. Developers should ensure that their applications do not exceed these rate limits, as doing so can result in their API key being suspended.

Overall, the CoinMarketCap API provides a straightforward and convenient way for developers to access real-time and historical cryptocurrency market data, enabling them to build powerful applications and services that integrate with the cryptocurrency market.

Coinmarketcap API features

Here are some of the top features of the CoinMarketCap API:

Real-time data: The CoinMarketCap API provides real-time data on the current prices, market capitalizations, trading volumes, and other metrics for thousands of cryptocurrencies.

Historical data: The API also allows developers to retrieve historical data for cryptocurrencies, including price, market capitalization, and trading volume.

Customizable endpoints: The CoinMarketCap API offers a variety of customizable endpoints that allow developers to retrieve specific data for the cryptocurrencies they are interested in.

Developer-friendly documentation: The API comes with detailed documentation and code examples to help developers get started quickly and easily.

Multiple language support: The CoinMarketCap API supports multiple programming languages, including Python, Node.js, Java, and PHP.

CoinMarketCap API Endpoints

CoinMarketCap APIs offer various endpoints that provide access to different types of cryptocurrency market data. Such as Price and Market Data Endpoints, Historical Data Endpoints, Exchange Endpoints, Blockchain Data Endpoints, Global Metrics Endpoints, Derivatives Data Endpoints

Endpoint paths follow a pattern matching the type of data provided:

  • Latest Market Data (*/latest)
  • Historical Market Data (*/historical)
  • Metadata (*/info)
  • ID Maps (*/map)

Here are some of the most commonly used endpoints in the CoinMarketCap API:

/cryptocurrency/listings/latest: Returns a list of the latest cryptocurrency listings on CoinMarketCap, including their current price, market capitalization, and trading volume.

/cryptocurrency/info: Returns detailed information about a specific cryptocurrency, including its name, symbol, website, and social media accounts.

/cryptocurrency/market-pairs/latest: Returns a list of the latest market pairs for a specific cryptocurrency, including their current price, volume, and liquidity.

/global-metrics/quotes/latest: Returns the latest global cryptocurrency market metrics, including total market capitalization, trading volume, and Bitcoin dominance.

Is CoinMarketCap API free?

The CoinMarketCap API offers both free and paid plans. The free plan provides limited access to the API, while the paid plans offer more features and higher usage limits.

The free plan of the CoinMarketCap API allows developers to get 9 latest market data endpoints and 10K call credits /month but No historical data and only for Personal use.

The paid plans of the CoinMarketCap API offer higher usage limits and additional features, such as access to more endpoints, more historical data, and priority support. The pricing of the paid plans depends on the number of requests per month and the level of features required.

Overall, the CoinMarketCap API provides developers with a convenient and powerful way to access real-time and historical cryptocurrency market data, whether they are using the free plan or a paid plan.

CoinMarketCap API Alternatives

As for alternatives, there are several other cryptocurrency data APIs available with better features in Free and Paid options, such as:

Token Metrics API

Token Metrics is an AI driven crypto analysis platform which enables its users to research thousands of cryptocurrencies in an automated way. Token Metrics recently launched a Crypto Data API for crypto investors and developers. 

Token Metrics Data API works as a robust crypto API that provides over 14 tested, actionable data endpoints that can empower traders, bots, and platforms. The accuracy and reliability of Token Metrics crypto data helps you make more informed trading decisions with less effort and has been rigorously tested to ensure accuracy.

This AI-powered API allows users to get access to actionable data endpoints to power trading bots, models, and platforms, to make the most money in the crypto space. Developers and crypto traders can easily get the all details from Token Metrics API Documentation.

CryptoCompare API

CryptoCompare Offers real-time and historical cryptocurrency market data, as well as news and social media sentiment analysis. The API supports a wide range of cryptocurrencies, exchanges, and trading pairs, making it a great resource for anyone looking to build a cryptocurrency-related project.

CoinGecko API

CoinGecko provides developers an easy-to-use API that can be integrated into their applications to retrieve information about cryptocurrencies. 

CoinGecko API basic version is free* for those who want it for personal use and testing purposes only with some conditions and limits. CoinGecko free API has a rate limit of 10-30 calls/minute.

Final Thoughts

CoinMarketCap is one of the top platforms in the crypto space, providing access to insightful data about thousands of cryptocurrencies and the market.

However, as time goes on, better solutions are being built that are more powerful and use AI to power their data, like Token Metrics. This allows investors to turn data into actionable insights to make informed investment decisions.

Crypto Basics

What is Bitcoin Halving and How Does it Impact the Market?

Token Metrics Team
7 Minutes
MIN

Over the years, Bitcoin has gained significant popularity and adoption as a means of payment and investment, with a growing number of merchants accepting it as a form of payment and an increasing number of investors buying and holding it as a store of value.

What is Bitcoin Halving?

Bitcoin Halving is a highly anticipated event that takes place every four years in the world of cryptocurrency. It is a pre-programmed adjustment in the Bitcoin blockchain protocol that reduces the mining rewards by 50% for each new block added to the network.

The purpose of the halving is to ensure that the rate of Bitcoin inflation remains under control, and that the total supply of Bitcoin never exceeds 21 million.

The upcoming Bitcoin Halving event has generated a lot of buzz and interest among investors and traders, as it is expected to have a significant impact on the price and overall market sentiment. In this blog post, we will dive deep into the topic of Bitcoin Halving, discussing what it is, how it works, and what to expect from the upcoming halving event.

When was the first Bitcoin Halving?

The first Bitcoin halving occurred on November 28, 2012, approximately four years after the cryptocurrency's launch. At that time, the mining reward for each block added to the Bitcoin blockchain was reduced from 50 BTC to 25 BTC.

This event marked a significant milestone in the Bitcoin ecosystem and signaled the beginning of a new era in the cryptocurrency's monetary policy. Since then, there have been two additional Bitcoin halvings, one in 2016 and another in 2020, with the mining reward reduced to 12.5 BTC and 6.25 BTC, respectively.

The next Bitcoin halving is expected to occur in 2024, at which point the mining reward will be further reduced to 3.125 BTC per block.

Bitcoin Halving Chart

A Bitcoin halving chart is a graphical representation that shows the historical and projected future dates of Bitcoin halvings, as well as the corresponding changes in the Bitcoin mining reward. 

“The chart typically includes a timeline of Bitcoin's history, starting with its launch in 2009, and marks the dates of each halving event as vertical lines. The halving events are also accompanied by a reduction in the Bitcoin mining reward, which is depicted on the chart as a downward sloping curve.”

Bitcoin Halving Chart

Bitcoin halving charts are used by investors, traders, and analysts to track the impact of halvings on the Bitcoin price and market sentiment. These charts can help in predicting potential price movements based on historical trends, as well as analyzing the impact of halvings on the overall supply and demand dynamics of Bitcoin.

Several online platforms offer Bitcoin halving charts that are frequently updated with the latest data and projections. These charts typically include additional features such as zooming, filtering, and customization options to allow users to analyze the data in more detail.

Overall, Bitcoin halving charts are a useful tool for anyone interested in understanding the impact of halving events on the Bitcoin ecosystem.

How does Bitcoin Halving work?

Bitcoin halving is a pre-programmed adjustment to the Bitcoin blockchain protocol that occurs approximately every four years. The process is designed to reduce the amount of new Bitcoin created with each block added to the blockchain by 50%.

The halving is a critical aspect of Bitcoin's monetary policy and serves to control the rate of inflation in the Bitcoin ecosystem.

Bitcoin halving works by reducing the mining rewards that Bitcoin miners receive for adding new blocks to the blockchain. When Bitcoin was first launched in 2009, the mining reward was set at 50 BTC per block.

After the first halving in 2012, the mining reward was reduced to 25 BTC per block. The second halving in 2016 further reduced the reward to 12.5 BTC per block, and the most recent halving in 2020 brought the reward down to 6.25 BTC per block.

The process of Bitcoin halving is automatic and built into the Bitcoin protocol, with a predetermined schedule that reduces the mining reward by half after every 210,000 blocks are added to the blockchain.

This cycle continues until the total supply of Bitcoin reaches 21 million, which is the maximum limit set by the protocol. Once the limit is reached, no new Bitcoins will be created, and miners will rely solely on transaction fees for their rewards.

The impact of Bitcoin halving on the mining industry and overall market sentiment can be significant. As the mining reward is reduced, it becomes more difficult and expensive for miners to earn a profit, leading to a potential decrease in the supply of new Bitcoins and an increase in their price.

Additionally, the halving can create uncertainty and volatility in the Bitcoin market, as investors and traders adjust their strategies based on the changing supply and demand dynamics.

Will BTC price go up or down after halving?

Predicting the exact direction of Bitcoin price movement after halving is difficult, as it is subject to various factors such as market sentiment, demand and supply, and overall adoption of the cryptocurrency. However, based on historical trends, many analysts and experts believe that Bitcoin price tends to go up after halving.

One reason for this belief is the reduction in the rate of new Bitcoin supply. With each halving event, the number of new Bitcoins entering the market decreases, creating a supply shock that can drive the price up due to increased scarcity.

Additionally, the halving can lead to a decrease in the profitability of Bitcoin mining, which could result in some miners leaving the network, reducing the overall supply of new Bitcoin even further.

However, it is also important to note that the impact of halving on Bitcoin price may not be immediate, and the price may experience fluctuations and volatility in the short term.

It is also worth considering that Bitcoin's price is influenced by a range of other factors beyond halving, such as macroeconomic conditions, regulatory developments, and investor sentiment.

Also Read - Is Bitcoin Dead? - Complete Analysis for BTC Investors

Impact of Halving on Bitcoin Miners

Bitcoin halving has a significant impact on Bitcoin miners, as it reduces the reward they receive for adding new blocks to the blockchain. With each halving event, the mining reward is reduced by half, which means that miners must work harder and invest more resources to earn the same amount of Bitcoin.

The reduction in mining rewards can lead to a decrease in profitability for miners, making it more challenging for them to cover their costs and remain profitable. This can lead to smaller miners being pushed out of the market, leaving only the most efficient and well-capitalized miners in the game.

However, there are some ways that miners can adapt to the changing market conditions after halving. For example, miners can lower their operating costs by upgrading their equipment to more efficient models, moving to locations with lower energy costs, or forming mining pools to share resources and reduce competition.

Additionally, as the price of Bitcoin tends to increase after halving, miners may be able to offset the reduced mining rewards by earning more from transaction fees and appreciation in the value of their Bitcoin holdings.

Overall, the impact of halving on Bitcoin miners depends on several factors, such as the cost of mining, the price of Bitcoin, and the level of competition in the market.

While the reduction in mining rewards can create challenges for miners, it is also an essential aspect of Bitcoin's monetary policy, which ensures the controlled release of new Bitcoin into the market and the maintenance of its value over time.

The Bottom Line

In conclusion, Bitcoin halving is a critical aspect of the Bitcoin protocol that serves to control the rate of inflation in the Bitcoin ecosystem.

The process of halving reduces the mining rewards that Bitcoin miners receive for adding new blocks to the blockchain by 50% every four years, until the maximum supply of 21 million Bitcoins is reached.

While the impact of halving on the Bitcoin market and miners can be significant, it is also an essential aspect of Bitcoin's monetary policy, ensuring the controlled release of new Bitcoin into the market and the maintenance of its value over time.

As Bitcoin continues to gain wider adoption and recognition as a legitimate asset, the impact of halving events is likely to become more pronounced, making it an important consideration for investors, traders, and Bitcoin enthusiasts alike.

Crypto Basics

How to Get Crypto Price Data in Excel and Google Sheets?

Token Metrics Team
5 minutes
MIN

Cryptocurrencies have become increasingly popular over the past few years, and more people are now investing in them. As a result, there is a growing need for tools and methods that can help investors track their cryptocurrency holdings and monitor market trends.

One such tool is the use of an API to pull crypto data into an Excel spreadsheet. This method allows investors to easily analyze and manipulate data in a familiar format. In this article, we will explore the steps involved in pulling crypto data into an Excel and Google spreadsheet using Token Metrics Crypto Data API. 

Token Metrics API Overview

The Token Metrics Data API is a comprehensive data solution that offers both real-time and historical market data for cryptocurrencies. Its purpose is to aid developers and businesses in accessing and analyzing data promptly to make informed decisions.

Regardless of whether you're a seasoned developer or just starting in the cryptocurrency world, you can maximize your crypto portfolio using the end-points provided by Token Metrics. 

The Data API provides a stream of 14 endpoints, including exclusive grades, analytics, and indicators, that can be utilized to empower your bots, models, and platforms. The data provided by the API can assist you in:

  • Validating
  • Back-testing, and 
  • Refining your investment decision-making process. 

Let’s check the process of pulling the crypto data into an Excel sheet in the 7-step breakdown below…

Import Crypto Data in Google Sheets and Excel

Here’s the step-by-step breakdown of extracting crypto data into an Excel Sheet using Token Metrics:

1. Register on Token Metrics Platform

First, head over to www.tokenmetrics.com/crypto-data-api and login/signup using your credentials.

Note: If you are new to Token Metrics, then click on Register, and sign-up for a 7-day free trial. One Bonus: You can pay with NFT.

Token metrics free trial

2. Go to Homepage

Once you are in, you will be guided to the homepage, where you will have all rating of crypto assets, as shown below:  

Token metrics crypto market page

3. Click on the DATA API

Now, click on the “DATA API” from the Menu Bar on the top. [Refer to the image below]

Click on Data API

4. Generate Access Key

From here, you need to generate your access key using the "Generate Access Key" button [as seen on the top-right corner of the image below]. 

Generate access key

Important Note:

Copy and save the access key shown on the next page as it will not be made visible again.

5. Open Google Sheets

It’s now time to open Google Sheets and create a new spreadsheet.

In this new spreadsheet, enter some crypto assets under Column 1 and their symbol in Column 2 like this.

Open Google Sheet

Here, we have put TM Token ID in Column 3, a unique identifier associated with each token in the TM Data API ecosystem. This will make your life easier once you become familiar with our interface on a daily basis.

In Column 4 and Column 5, we have put TM Investor Grade and TM Trader Signal, respectively, which will be fetched from TM Data API in the following steps.

6. Go to Extensions and click Apps Script

Now, hover over to the "Extensions" tab under the menu bar and click "Apps Script" where we will write scripts to automate the fetching of the above metrics in the Google Sheets. 

Go to Extensions and click Apps Script

7. Apps Script IDE

Now, our powerful ‘Apps Script IDE’ will be opened, where we will write the code to the script and later deploy as necessary. 

Apps Script IDE

The Code Format: 

We will start writing the script in Code.gs file.

The following part will be focused on the actual code that will be written in the script file.

Run the Open() function once using the above command, and you will see a menu "Update Metrics" in the spreadsheet menu bar with the following options:

  • TM Token Ids
  • TM Investor Grade
  • TM Trader Signal 

You can click on all the three options, one at a time, to see the results displayed on the spreadsheet.

crypto data results

Also, you can update the metrics whenever required by pressing the above buttons in the menu bar, so that you get the accurate data for your investments. 

Crypto data metrics on Google sheet

Interested?

Looking to learn more about our Crypto data API?

Just head over here - developers.tokenmetrics.com

Having explained all this, let the truth be told. Token Metrics does not personally favor or vouch for any particular cryptocurrency in the market. 

The Bottom Line

In conclusion, pulling crypto data into an Excel spreadsheet using an API can be a useful and efficient way to keep track of market trends and analyze cryptocurrency performance. 

By following the steps outlined in this process, one can easily integrate an API into Excel and retrieve real-time data on various cryptocurrencies. 

Additionally, with the vast array of features available on Token Metrics API, one can tailor their data retrieval to specific preferences and easily manipulate the data in Excel for further analysis. 

With the growing importance of cryptocurrencies in the financial world, utilizing APIs to pull crypto data into Excel can provide a valuable tool for traders, investors, and researchers alike.

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