List of Developer Tooling projects on Bitcoin (2026)

WDK provides open-source libraries and modules for building self-custodial wallets supporting multiple blockchains. The modular architecture includes wallet modules for blockchain operations, protocol modules for DeFi integrations including swaps, bridges, and lending, and pre-built UI components for React Native. Built on Bare runtime, it supports Node.js and React Native environments, enabling deployment across mobile, desktop, embedded systems, and server applications.

MDK is an open-source developer framework that gives Bitcoin mining operators and developers unified control over mining infrastructure. It combines a backend software development kit with a modular worker and orchestration architecture that standardizes communication with miners, sensors, cooling, and electrical systems, alongside a user interface development kit for building dashboards. Developers use it to build monitoring dashboards, automated workflows, pool management tools, and analytics or optimization applications without building device-level integrations from scratch.

SNF Faucet is a testnet faucet for the Starknet Sepolia network. It distributes test ETH and STRK tokens to developer wallet addresses upon request. It allows developers to fund test accounts for smart contract development and testing without acquiring mainnet tokens.

Starkzap is a TypeScript SDK for integrating Starknet-based Bitcoin, stablecoin, and DeFi features into applications. It provides four modules covering embedded wallets, gasless transactions, DeFi yield products, and token operations, with support for web and mobile platforms. It allows developers to add Starknet functionality to existing apps without building blockchain infrastructure from scratch.

Subgraphs implement flexible blockchain indexing through TypeScript, enabling developers to create custom GraphQL APIs from smart contract data. The system processes on-chain events and provides queryable endpoints with webhook support and automated deployment capabilities.

Mirror implements real-time data streaming pipelines that sync blockchain data directly into databases and message queues. The system enables point-and-click configuration for multiple data destinations while providing unlimited access without per-query fees.

TransFi API is a developer tooling product that provides a unified programmatic interface for integrating fiat and crypto payment functionality into third-party applications. It exposes endpoints for payments, conversions, and money movement so developers can embed payment capabilities into their own products without building separate integrations for each payment method. The API serves businesses building payment flows that combine local fiat rails with stablecoin and crypto settlement.

Squid Widget is an embeddable React component that allows applications to integrate cross-chain swapping functionality directly into their interfaces. The widget supports customizable themes and configurations for seamless user experiences.

Squid SDK provides TypeScript libraries and examples for developers to integrate cross-chain routing capabilities into their applications programmatically. The SDK offers route calculation and transaction execution functionality.

Squid API provides REST endpoints for calculating cross-chain routes and executing transactions. The API enables developers to access Squid Router functionality without client-side SDK integration.

Portal Enclave MPC API provides server-side blockchain signing through TSS MPC cryptography combined with AWS Nitro Secure Enclaves. The system enables sub-second transaction signing for EVM-compatible and Solana smart contracts through RESTful API endpoints.

Portal Account Abstraction enables gas sponsorship, transaction batching, and programmable on-chain functionality through smart contract wallets. The system integrates with Portal's MPC infrastructure to provide configurable account abstraction features.

Crypto Exchange API is a developer API that enables platforms to add crypto swap functionality and expand supported coins and tokens, with partner revenue sharing and priority support.

Exchange Widget is an embeddable module that lets websites offer crypto swaps, buy/sell, and DEX modes with customizable appearance, token settings, and performance statistics.

QuickAlerts is a feature that provides real-time notifications about onchain events, helping users stay updated with the latest blockchain activities

Software development kit for easy integration of QuickNode services into applications.

Topper is a fiat-to-crypto on-ramp and crypto-to-fiat off-ramp delivered through an embeddable widget and developer APIs for business partners and wallets. Consumers buy crypto directly to a self-custodial wallet using cards, digital wallets, or bank transfers, and sell crypto to receive fiat on a linked debit card. The product supports recurring purchases and integrates via a web SDK, mobile SDK, REST API, webhooks, and single sign-on for partner applications.

AMIS provides enterprise blockchain infrastructure through patented technologies including Istanbul BFT consensus algorithm and Hierarchical Threshold Signature Scheme. The platform offers custodial wallet services, PoS protocol implementations, and Layer 2 framework solutions for financial institutions.

Range API provides access to blockchain intelligence infrastructure, enabling address screening, compliance checks, and real-time transaction risk detection through programmatic interfaces.

An API and SDK for developers to integrate multi-chain token swaps into their applications, supporting both DEX aggregation and cross-chain transactions.

MPC Node Suite is a fully privatized, white-label MPC-TSS infrastructure that enables businesses to build keyless wallet and custody systems at scale. Server-side middleware secured by Intel SGX trusted execution technology works alongside SDKs for web, iOS, and Android to provide distributed key generation, signing, refreshing, and recovery with configurable signing thresholds. The suite supports hierarchical deterministic key derivation and multiple blockchain networks, serving exchanges, payment service providers, wallet service providers, and self-custody service providers building cold-wallet and custody applications.

Tatum Platform is a unified blockchain development toolkit providing RPC nodes, APIs, SDKs, and developer tools for building Web3 applications. The system offers access to multiple blockchain protocols through standardized interfaces while maintaining cross-chain compatibility and enterprise-grade infrastructure.

Consumer App manages decentralized credit, enabling card management and financial service access without selling crypto.

Linkio API is a developer API that lets applications and websites integrate stablecoin and fiat FX conversion directly into their own products. It exposes endpoints for initiating on-ramp and off-ramp transactions, generating payment links, checking rates, and monitoring transaction status through webhooks. Developers building remittance, checkout, wallet, or payroll products use it to add currency conversion without operating their own compliance or settlement infrastructure.

FM Liquidity Match is a SaaS trading infrastructure with master and sub-accounts to resell liquidity, internalize flows, and manage risk, settlement, and reporting.

FM White Label is a white-label ECN-as-a-Service that lets businesses launch a branded institutional crypto trading platform with risk and spread management and API/GUI access.

AppKit implements wallet connectivity and onchain UX infrastructure through modular SDK architecture, enabling wallet logins, multichain support, and user analytics. The system provides social authentication, embedded wallet creation, and transaction management while maintaining cross-platform compatibility.

Nimiq Keyguard is a developer tool that handles private key storage and transaction signing within an isolated browser environment. It keeps cryptographic keys separated from application interfaces through strict security policies, reducing the risk of key exposure. Developers building Nimiq-based applications integrate it to add secure signing without managing keys directly.

Transaction Automation implements programmable transaction signing and workflow management through policy-driven controls, enabling automated asset movements, multi-signature approvals, and complex transaction sequences. The system provides granular permission management and compliance tracking for institutional-grade operations.

Turnkey Company Wallets is a developer infrastructure product that lets organizations operate wallets for onchain automation with programmable controls. It provides smart contract execution management, payment orchestration workflows, and signing infrastructure for autonomous agents alongside human-operated flows. Businesses use it for high-volume transaction signing, treasury operations, and agentic payment automation across multiple blockchains, with policy-based permissioning applied to every operation.

Token Terminal Data Room provides SQL-based access to Token Terminal's multichain data warehouse, enabling technical teams to query and analyze raw blockchain data directly.

Token Terminal Sheets integrates blockchain data directly into Google Sheets and Excel through plugins and pre-built functions for analysis workflows.

PDAX Connect is a B2B integration offering that provides APIs and white-label interfaces to add crypto trading and wallet services with VASP licensing and custodial support.

Hemi Bitcoin Kit (hBK) is a developer tooling library of smart contracts enabling Solidity developers to query native Bitcoin state within the EVM environment. The library abstracts hVM precompile calls into structured interfaces, offering methods to retrieve Bitcoin address balances, UTXOs, transaction details, and block headers without relying on external relayers or gas-intensive proof validation. Developers use hBK to build Bitcoin-aware dApps on Hemi with trustless, real-time access to live Bitcoin blockchain data.

Cross-chain infrastructure that enables secure wallet-to-app connectivity through decentralized service nodes, gateway nodes, and relay services using rendezvous hashing-based database architecture.

CoinTool is a no-code blockchain toolbox that enables token creation, batch token distribution, and wallet management across multiple EVM and non-EVM networks. Users deploy standard token contracts, send tokens to multiple addresses in one transaction, generate wallets in bulk, check allowances, and query airdrop eligibility through a browser-based interface without writing code.

A browser extension displaying real-time gas price information across Bitcoin, Solana, and over 80 EVM-compatible networks.

Noves App provides a unified platform for blockchain data services, enabling access to various APIs, tools, and features including transaction inspection, data export for tax purposes, and integration solutions across 80+ blockchain networks.

Foresight API analyzes unsigned transactions to show what they will do before execution, providing plain-English descriptions and simulations of anticipated asset transfers and contract interactions.

Sats Connect is a JavaScript SDK enabling web applications to connect to Bitcoin wallets. The library implements the WBIP001 standard for wallet connection, transaction signing, account management, and supports Bitcoin Layer 1, Stacks, and Starknet interactions.

Xverse API is a Bitcoin data and infrastructure API for developers. The service provides Bitcoin RPC access, Ordinals indexing, Runes support, BRC-20 token data, portfolio and transaction history, swap aggregation, and Runes minting and etching services for building Bitcoin applications.

Zeus Program Library provides developers with tools and infrastructure to build multi-chain applications leveraging Bitcoin functionality on Solana through pluggable and programmable components.

BitcoinKit is a modular developer toolkit that enables Bitcoin integration with Solana's DeFi ecosystem through programmable interfaces. The system provides widgets, APIs, SDKs, and CLI tools for building Bitcoin-native applications, facilitating tokenized BTC trading, lending, and cross-chain liquidity access without custodial dependencies.

A unified API infrastructure providing read and write connectivity to multiple blockchains and DeFi protocols. The system supports transaction signing, data querying, price discovery, trade decoding, compliance checks, and liquidity management across DEXs, bridges, lending platforms, staking protocols, oracles, and NFT marketplaces. The platform uses a modular architecture enabling developers to interact with various chains and protocol endpoints through standardized API calls.

Drops Airdrop Tracker monitors wallet addresses across multiple blockchain networks to identify unclaimed cryptocurrency airdrops, providing eligibility checks and Telegram notifications. The platform tracks airdrops on Ethereum, Solana, Cosmos, Aptos, Sui, Starknet, Bitcoin, and TON without requiring wallet connections.

Thoth functions as a security toolkit for Cairo and Starknet, providing bytecode analysis, disassembly, and decompilation capabilities for smart contract review. The tool enables security teams to inspect low-level code execution and identify potential vulnerabilities in deployed contracts.

Cairo-fuzzer implements automated testing techniques for Cairo and Starknet smart contracts, identifying edge cases and security vulnerabilities. The system uses input mutation to generate test cases, allowing developers to discover potential exploits during development rather than after deployment.

Octopus performs security analysis on WebAssembly modules and blockchain smart contracts across multiple platforms including Bitcoin, Ethereum, NEO, and EOS. The tool enables comprehensive code inspection for vulnerability detection and contract verification.

WARF tests WebAssembly runtimes for security issues through automated fuzzing techniques. The tool focuses on improving resilience in WebAssembly virtual machines, parsers, and execution environments by systematically identifying edge cases and unexpected inputs.

Sui-fuzzer implements automated testing for Sui blockchain smart contracts, detecting security vulnerabilities through input manipulation techniques. The system tests contract execution paths systematically, providing developers with insights into edge cases and potential security flaws before deployment to the Sui network.

Dynamic SDK is a wallet infrastructure platform that lets applications embed self-custody and server-managed wallets, connect external wallets, and accept stablecoin payments. It provides authentication through email, social login, and external wallets, key management via threshold signature schemes, and smart account features for gas sponsorship and approval logic. Developers use it to onboard users, manage compliance and fraud controls, and move funds across multiple blockchains without building wallet infrastructure from scratch. The platform also supports global wallets that operate across multiple partner applications and programmatic server wallets for automated signing.

Lightspark SDK provides developers with APIs and libraries for Lightning Network integration across multiple programming languages. The toolkit enables businesses to build Bitcoin payment functionality into applications without managing Lightning infrastructure directly.

CoinRemitter is a merchant payment gateway that lets businesses accept cryptocurrency payments for goods, services, and donations. It processes payments through hosted wallets with automated forwarding to merchant-specified addresses, notifying merchants of activity via webhooks. Merchants integrate it through a REST API, open-source plugins for popular e-commerce and web platforms, or embeddable tools such as invoicing, pricing tables, presale campaigns, payment buttons, and hosted payment pages. It supports transactions across multiple blockchains and stablecoins.

ICPay Payment Processor is a multi-chain payment network that lets merchants and developers accept cryptocurrency and card-based payments across several blockchain ecosystems. It processes payment intents through a hosted API, an embeddable software development kit, and prebuilt payment widgets, converting between stated dollar amounts and on-chain tokens with sub-two-second settlement. Wallet connection helpers, an optional fiat onramp, and plugins for common content and commerce platforms let merchants add checkout flows, tips, paywalls, and donation tools without building custom payment infrastructure. Developers use the accompanying developer kit and widget components to embed the same payment flows directly into websites and applications.

Alpaca Trading API enables commission-free stock, options, and crypto trading through REST and WebSocket interfaces for algorithmic traders and developers. The system supports real-time order execution, portfolio management, and paper trading simulation environments for strategy testing. Trading API includes margin trading capabilities, fractional share trading, and automated order routing across market venues.

Broker API provides brokerage infrastructure for businesses building trading applications and investment platforms. The system handles account opening, funding operations, trade execution, custody services, and regulatory reporting for end users. Broker API supports local currency trading, funding wallets, omnibus sub-accounting, and white-label brokerage services for fintech companies and financial institutions.

Kakarot implements a complete EVM in Cairo, enabling existing Solidity smart contracts to run on Starknet. The system combines STARK-based cryptography with full EVM compatibility, allowing developers to deploy and execute Ethereum applications within Starknet's high-performance environment while maintaining code compatibility.

Keth implements chain-agnostic EVM proving that generates ZK proofs of EVM block execution in real-time. The system can help optimistic rollups transition to ZK, reinforce existing ZK-rollups with multiple proof systems, and power ZK-bridges for cross-chain interoperability, all while leveraging Starkware's STARK technology for efficient proof generation.

Kakarot on Bitcoin enables Ethereum-compatible ZK-rollups secured by Bitcoin using OP_CAT and other opcodes. It allows the verification of ZK proofs directly on Bitcoin, enabling trust-minimized bridging of BTC to rollups and unlocking native DeFi capabilities while maintaining Bitcoin's security guarantees.

Noah Business API is a unified payment infrastructure with RESTful endpoints, providing access to global payment capabilities across 50+ currencies and 70+ countries. The system integrates compliance, settlement, and cross-border functionality through single API integration.

RGB Protocol Implementation provides development tools for Bitcoin smart contracts through client-side validation. The system includes RGB Core Library for consensus validation, RGB Standard Library for high-level APIs, command-line tools for asset management, and RGB Node server infrastructure for production deployments.