Crypto APIs

# Crypto APIs > The blockchain infrastructure suite for Web 3. Crypto APIs Inc. provides a blockchain infrastructure suite offering unified APIs for blockchain data, transaction processing, wallet management, blockchain events, and crypto market data. Newer additions include AML address screening (Verify Address) and Model Context Protocol servers + an n8n MCP client for AI-agent integrations. Coverage spans 20+ blockchains. This file follows the [llms.txt convention](https://llmstxt.org). It curates the canonical entry points for an LLM-driven agent. The technical reference lives on [developers.cryptoapis.io](https://developers.cryptoapis.io); for machine-readable URL inventories see [/cryptoapis/sitemap.xml](https://cryptoapis.io/cryptoapis/sitemap.xml). ## About - **Legal entity:** Crypto APIs INC (Delaware, United States) - **Founded:** 2018 - **Headquarters:** 24a Trolley Square, Wilmington, DE 19806, United States - **Contact:** [hq@cryptoapis.io](mailto:hq@cryptoapis.io) - **Identifier:** US EIN 30-1313692 ## Getting started - [Free Crypto API](https://cryptoapis.io/free-crypto-api): Free tier to start building — blockchain data, market prices, HD wallets, and webhooks via one REST API across Bitcoin, Ethereum, and 20+ chains. No credit card required; upgrade as usage grows. See [Pricing](https://cryptoapis.io/pricing) for tiers. ## Products API products in the suite. Each page describes what the product does, what blockchains it supports, and links to the technical reference on the developer portal. - [Blockchain Events](https://cryptoapis.io/products/blockchain-events): Webhook-based notifications for on-chain activity (incoming/outgoing transactions, confirmations, mined blocks, internal transactions, token transfers). - [Block Data](https://cryptoapis.io/products/block-data): Latest and historical block data — height, hash, transactions, mining info — across UTXO, EVM, and XRP chains. - [Blockchain Fees](https://cryptoapis.io/products/blockchain-fees): Real-time gas/fee estimation per chain (slow/standard/fast tiers) for EVM, UTXO, and XRP. - [Broadcast Transactions](https://cryptoapis.io/products/broadcast-transactions): Submit signed transactions to any supported blockchain network. - [Address Latest](https://cryptoapis.io/products/address-latest): Current balance, nonce, token holdings, and recent activity for any address across EVM, UTXO, Solana, Kaspa, and XRP. - [Address History](https://cryptoapis.io/products/address-history): Full transaction history for an address with cursor-based pagination across EVM and UTXO. - [Contracts Data](https://cryptoapis.io/products/contracts): Smart-contract reads, ABI, deployment info, and token metadata for EVM and Solana programs. - [Dedicated Nodes](https://cryptoapis.io/products/dedicated-nodes): Single-tenant blockchain nodes with managed infrastructure, archive support, and SLAs. - [Blockchain Utils](https://cryptoapis.io/products/blockchain-utils): Helper endpoints — address derivation, validation, signature verification, encoding utilities. - [HD Wallets](https://cryptoapis.io/products/hd-wallets-management): Hierarchical-deterministic wallet management — generate xPubs, derive addresses, sync balances. - [Prepare Transactions](https://cryptoapis.io/products/prepare-transactions): Server-side transaction construction with automatic fee/nonce/gas calculation for EVM. - [Transactions Data](https://cryptoapis.io/products/transactions-data): Lookup individual transactions by hash with parsed fields, status, fees, and internal calls. - [Market Data](https://cryptoapis.io/products/market-data): Current asset prices, supply/market-cap stats, token contract addresses across protocols, and asset-to-asset exchange rates (CoinMarketCap-sourced). No OHLCV/candlesticks or per-exchange order-book data. - [Transaction Simulator](https://cryptoapis.io/products/transaction-simulator): Simulate EVM transactions on mainnet state to predict gas, errors, and outcomes before broa […gekürzt]