Summ, formerly known as Crypto Tax Calculator (CTC), is an automated crypto tax platform serving individuals, accountants, and businesses worldwide. It generates ready-to-file reports for crypto investors, DeFi participants, traders, and tax professionals. To support global tax compliance, Summ requires reliable pricing data for a wide range of crypto assets globally. CoinGecko API provides the breadth and reliability needed to value diverse assets accurately and ensure dependable tax outcomes for users.

Key Metrics At A Glance

• Integrating CoinGecko API’s crypto market data allows Summ to support accurate tax reporting for over 1,000,000 crypto assets in 180+ countries.

• Since expanding its data coverage with CoinGecko API, Summ has empowered users to track and report on over $21 trillion in onchain transactions across 3,500+ exchanges, wallets, and DeFi protocols.

• Summ leverages CoinGecko API’s institutional-grade and trusted data to ensure the reporting accuracy that its users rely on, achieving an average 4.8/5 star rating on Trustpilot and official partnerships with Coinbase and MetaMask.

The Challenge: Complexity of Crypto and DeFi Tax Compliance

Crypto tax reporting requires accurate pricing at the exact moment a transaction occurs. Users interact with thousands of exchanges and wallets, and increasingly with DeFi protocols that create complex on-chain positions. These include derivatives, liquidity pool shares, yield-bearing vault positions, staking receipts, and other mechanisms where valuation depends on precise chain-level pricing. Thin liquidity, emerging tokens, and cross-chain versions of the same asset further complicate tax treatment. Summ needed a data provider capable of supporting this diversity while delivering reliable historical pricing, fast support for new tokens, and consistent data across multiple chains.

Why Summ Chose CoinGecko API

CoinGecko API provides the token coverage, reliability, and data granularity required to support Summ’s automated tax engine. Its ability to list new assets quickly ensures that even new or long-tail tokens are priced accurately during tax season. Summ depends on CoinGecko’s consistent historical and real-time pricing to calculate cost basis, gains, and tax outcomes, including advanced DeFi activity where valuation precision is critical. These capabilities give Summ the accuracy needed to power its proprietary “Least Tax First Out” algorithm and deliver audit-ready reports.

Summ’s treasury view dashboard consolidates multi-chain assets, inflows, outflows, and token allocation.

How Summ Leverages CoinGecko API

Summ integrates market data from CoinGecko API directly into its automated workflow, ensuring that raw transaction data is correctly identified, mapped, and valued across thousands of sources.

Comprehensive Portfolio Tracking

Summ allows users to track their portfolio, trades, and tax liabilities from a single interface. By fetching real-time market data via CoinGecko API’s /coins/markets endpoint, the platform updates tax estimates after every trade, giving users immediate insight into the tax impact of their decisions.

Summ’s portfolio dashboard leverages CoinGecko API to provide real-time balance, gains, and valuation insights. 

Integration-Specific Tax Reporting

Reliable tax reporting requires more than just global average prices. Summ leverages CoinGecko API’s /exchanges/{id}/tickers endpoint to retrieve specific market data across its 3,500+ integrations of exchanges, wallets, and DeFi protocols. This ensures that every transaction is valued based on the actual conditions of the specific exchange used, delivering audit-ready precision.

Summ supports tax reporting for  3,500+ exchanges, wallets, and DeFi protocols, made possible by CoinGecko API’s ability to retrieve granular pricing data from specific exchange venues.

Business and User Outcomes

Since integrating the CoinGecko API, Summ has successfully scaled its operations to support accurate tax reporting for over 1,000,000 crypto assets across 180+ countries, delivering the precise real-time and historical market data required for global compliance. This expanded data coverage now empowers its users to confidently track and report on over $21 trillion in onchain transactions, spanning a vast ecosystem of 3,500+ exchanges, wallets, and DeFi protocols.

Ultimately, by leveraging CoinGecko’s institutional-grade data, Summ ensures the reporting accuracy that its users rely on. This reliability has been central to building user trust, resulting in an average 4.8/5 star rating on Trustpilot and securing official tax partnerships with industry leaders like Coinbase and MetaMask.

"Since the start of Summ’s journey, CoinGecko has been an invaluable partner in providing reliable pricing feeds and comprehensive asset information across the entire cryptocurrency ecosystem. Their ability to keep pace with such a rapidly evolving space ensures we can deliver accurate calculations across thousands of protocols, chains, and long-tail assets.”

What’s Next On The Roadmap?

Summ is focused on deepening its portfolio tracking capabilities and enhancing on-chain support. The team plans to improve the categorization and detection of complex onchain DeFi activities, ensuring that even the most advanced trading strategies are easily reportable.

Summ also aims to enhance pricing resolution for less-traded tokens and continue its global expansion by integrating with key exchange partners worldwide. As Summ evolves, CoinGecko’s data will remain central to its mission of providing accurate, automated, and stress-free crypto tax reporting.

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This article was written in collaboration with Summ team.