List of Developer Tooling companies in Web3 (2026)

Freedom Tool is an open-source decentralized voting solution using zero-knowledge cryptography to enable transparent, privacy-preserving online voting on blockchain. It protects voters from tracking while enabling digital identity verification.

Flipster Trading API provides programmatic access to the platform's trading and market data functionality. The REST API and WebSocket interface support spot and perpetual markets, isolated and cross-margin modes, and order types including market, limit, and stop-market. Authentication uses HMAC signing with per-key rate limits. Access is available to a limited group of selected users pending a public release.

Staking SDK implements developer tools enabling applications to integrate multi-chain staking functionality through standardized APIs. The system provides abstraction layers for validator operations, reward tracking, and transaction signing across supported Proof-of-Stake networks, reducing implementation complexity for institutional platforms and wallet providers.

Deribit API provides JSON-RPC and WebSocket interfaces for programmatic access to derivatives trading, supporting REST endpoints, real-time market data subscriptions, and FIX protocol integration for institutional clients.

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.

IDX AutoBot is a web-based developer tooling platform that provides on-chain utilities for Solana token builders. It bundles an automated market maker and volume bot with multiple engine tiers to generate trading activity, alongside SPL token creation, Raydium liquidity pool setup, token metadata management, bulk token distribution, automated holder growth, social engagement boosting, and token supply controls such as burning and authority revocation. Founders, marketers, and developers use the dashboard to launch and manage Solana tokens without writing code, and all tools operate non-custodially without requiring access to private keys.

Modern Treasury Ledgers is a managed accounting database that tracks financial transactions using double-entry accounting principles. The product provides a RESTful API with official SDKs for JavaScript, Java/Kotlin, Python, and Go. Developers can define account hierarchies of up to five levels, log and query double-entry transactions in real time, and configure auto-ledgering rules for payment orders. Supporting features include balance locking to prevent overdrafts, balance monitors with webhook alerts, account reconciliation against external bank balances, complete audit logs, and automated exports to data warehouses. Infrastructure provisioning, caching, and maintenance are fully managed.

Web3Auth SDK, now offered as MetaMask Embedded Wallets, is a developer tooling product that lets applications embed self-custodial wallet functionality without requiring browser extensions or seed phrases. It authenticates users through email, social logins, or passkeys, then generates keys using multi-party computation so no single party ever holds a complete private key. The SDK bundles account abstraction support for smart accounts with gasless and batched transactions, multi-factor recovery options, and wallet services such as fiat-to-crypto funding and swaps, enabling developers to onboard users into onchain applications across multiple blockchain ecosystems from a single integration.

Zero knowledge applications built using o1js, a TypeScript-based library, that enable privacy-preserving computation, off-chain processing with on-chain verification, and composable proofs with no gas fees.

Avantis SDK provides developers with tools and APIs to integrate real-time price feeds, execute trades, and manage positions on the Avantis platform for building DeFi applications and trading algorithms.

X402 Echo Merchant is a demo merchant that lets users run real x402 payment flows at zero cost, automatically refunding payments to validate integrations without financial risk.

Portals API provides developers with unified endpoints for DeFi aggregation, swap execution, and on-chain data retrieval. The API enables integration of DEX aggregation, zap functionality, and both real-time and historical token data into applications. It includes endpoints for token information, network support, platform data, transaction execution, approval management, and account balance queries.

NeoDAX is a Crypto brokerage toolset built on Yellow SDK that provides a pre-built software stack for launching exchange and trading businesses. Offers configurable trading software with turnkey liquidity access through Yellow Network, modular components, and open-source architecture for financial exchange operations.

Immutable Hub is a Web-based project management dashboard for studios building on Immutable Chain. Enables zero-code smart contract deployment using pre-built Asset Contract templates, project environment configuration, and testnet token distribution. Provides access to live developer support and documentation for the Immutable product suite.

Covalent Network is a Decentralized data infrastructure protocol addressing long-term blockchain data availability and verifiability. The network captures raw blockchain state as Block Specimens which are enriched by Block Results Producers and stored across distributed operator nodes. Network Operators stake CXT tokens as an economic bond covering roles including Block Specimen Producer, Block Results Producer, and Ethereum Wayback Machine Light Client, with cryptographic proofs verifying data accuracy at each stage. The Ethereum Wayback Machine component preserves complete Ethereum historical state as the protocol moves toward state expiry under EIP-4444.

Developer tools and SDK that provide game distribution, version control, social features, anti-cheat integration, and Web3 components for indie game developers.

IO Intelligence enables AI application development through an OpenAI-compatible API that connects to leading machine learning models on io.net infrastructure. It allows developers to integrate AI capabilities with secure processing, cross-platform compatibility, and scalable global GPU resources at reduced costs compared to centralized providers.

D3 Connect SDK provides domain resolution capabilities for applications using wallet addresses. The software resolves human-readable names to blockchain addresses through standardized APIs. Developers implement the SDK to support cryptocurrency transfers using domain names instead of addresses. The system unifies traditional DNS and Web3 naming services into a cross-platform interface.

Tsuko is a developer tooling product providing paymaster-as-a-service functionality on ZKsync Era. It lets projects create, customize, and manage paymasters, the smart contracts that cover transaction fees on behalf of end users, without writing custom code. Software development kits extend this functionality, letting developers integrate paymaster support directly into their own applications. Development teams use Tsuko to offer gasless or sponsored transactions within their applications on ZKsync.

Developer APIs enabling fintech and blockchain companies to integrate compliant USD banking solutions, including deposit webhooks, payment automation, beneficiary management, and embedded banking capabilities.

ONINO Developer Platform is a cloud‑based toolkit with templates, AI‑assisted code, deployment tools, and REST APIs for building on ONINO.

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.

Regen Registry provides tools for project developers to register ecological projects, develop credit methodologies, and issue ecocredits through standardized verification protocols.

A standardized framework for smart contract address labeling that enables community contributions to contract metadata through attestations.

CoinCraddle API is a developer API enabling integration of cryptocurrency exchange functionality into third-party applications with customizable fee structures and access to aggregated liquidity from multiple providers.

Roqqu API Services provides developer APIs enabling businesses and platforms to integrate Roqqu's payment and crypto capabilities into their own applications. Developers access endpoints for payment processing, crypto transactions, and financial service integrations through a documented API layer.

Coinone API is a developer interface exposing REST and WebSocket endpoints for market data and account operations with versioned references and real-time streams.

Swift Developer Portal is a centralized API catalogue with documentation, sandbox environments, and developer tooling for Swift service integration. The portal hosts API specifications for payments tracking, reference data, financial messaging, compliance screening, and securities services. Standards tools including MyStandards and Swift Translator support message standards management and MT-to-ISO 20022 format translation.

Roller is a command-line tool for deploying and operating RollApps on Dymension. Operators use it to run RollApp sequencers, manage full nodes, and operate eIBC clients for processing cross-chain withdrawals. The tool includes pre-built primitives for DeFi oracles, random number generation, and AI oracles to support common RollApp integrations. A companion frontend SDK, Dymension Connect, allows RollApp developers to add signless user authentication and wallet connectivity to their applications.

The DEXTools HTTP API is a developer tooling product that gives programmatic access to decentralized exchange trading data collected by the DEXTools platform. It returns structured information on trading pairs, tokens, exchanges, and pools, with filtering and sorting by blockchain or token, and delivers near real-time updates when new trading pairs appear on supported networks. Developers and third-party applications use the API to integrate DeFi market data into their own tools without building direct blockchain indexing infrastructure.

ForgeBox is an open-source hardware development kit that provides a secure hardware foundation for developers to build and deploy their own custom code. It is built with multiple secure element chips and a self-destruct mechanism, allowing developers to establish their own root of trust so that only code signed by their private key can execute on the device. The product targets Web3 developers building custom security applications rather than end users seeking a ready-to-use wallet.

LavaOS provides plug-and-play API infrastructure enabling seamless integration of Lavarage's trading capabilities into external platforms. The system offers programmatic access to spot margin trading functionality for trading bots, DEXs, and DeFi applications.

RISC Zero zkVM is a zero-knowledge virtual machine that enables developers to write applications with verifiable computation in Rust and other languages.

SingularityNET Platform operates as a decentralized marketplace for AI services, enabling developers to publish, discover, and monetize AI algorithms across multiple domains including computer vision, natural language processing, and robotics through blockchain-based transactions.

Rollup Engine provides developers with tools to deploy custom Ethereum Layer 2 and Layer 3 blockchains using established frameworks like Arbitrum Nitro, Optimism Bedrock, ZK Stack, and Polygon CDK. The platform manages deployment, customization, maintenance, and security for rollups.

AbstractionKit is an open-source TypeScript SDK that provides developers with tools to build ERC-4337 and EIP-7702 smart wallets. The platform features Safe Account integration, user operation construction, gas sponsorship through integrated paymaster services, transaction bundling via Voltaire bundler infrastructure, social recovery capabilities, and includes a reference mobile wallet implementation demonstrating seedless recovery, gasless transactions, and batch operations.

Bitwage Partner API is a developer tooling product that lets third-party businesses integrate global payroll and payment functionality into their own applications. It provides authenticated endpoints, using API keys or OAuth 2.0, for creating companies, managing workers, and initiating payroll or invoice payments. Developers use it to embed crypto and fiat payroll capabilities directly into their own platforms without building payment infrastructure from scratch.

Walrus Sites provides developer tooling for deploying decentralized websites using Walrus storage and Sui blockchain smart contracts. The platform includes a site-builder CLI tool for converting standard web frameworks output into decentralized sites, with metadata stored on Sui and resources stored on Walrus. Sites support dynamic functionality through Sui-compatible wallet integration and Move-based smart contract programmability, accessed via portal infrastructure.

GhostGraph is a developer tool that lets users write blockchain indexers in Solidity, define schemas, implement handlers, and query indexed data via GraphQL using hosted endpoints.

W3AP is an advertising infrastructure platform for Web3 applications. It provides SDKs, APIs, and tools that enable developers to integrate advertising capabilities into decentralized applications. The platform handles ad delivery, tracking, and reward distribution through blockchain technology.

Ash Toolkit is an open-source developer tooling collection for Avalanche node operators and Subnet or L1 developers. It comprises an automation collection for provisioning and managing Avalanche nodes and blockchains, a command-line interface for interacting with and exploring Avalanche networks, and an underlying software library used to build custom Avalanche tooling. Node operators and developers use the toolkit to automate deployment, configuration, and monitoring tasks rather than performing them manually.

Databricks Data Intelligence Platform is a unified lakehouse platform combining data engineering, analytics, machine learning, and generative AI for enterprise data teams. The platform ingests and transforms data through automated pipelines, supports serverless data warehousing through an optimized query engine, and provides model training, serving, and retrieval infrastructure for building AI agents and applications. A governance layer applies unified access control, lineage tracking, and auditing across all data and AI assets, while built-in sharing capabilities allow secure data exchange across organizations. The platform is deployed across multiple major cloud providers and includes collaborative development environments, a machine learning lifecycle management system, and privacy-preserving data collaboration tools.

SwapKit is a cross-chain swap SDK and REST API for integrating non-custodial multi-chain trading into wallets, DEXs, and platforms. The system aggregates liquidity from THORChain, Chainflip, Maya Protocol, and NEAR Intents, routing transactions across multiple blockchains in a single user signature. It supports DEX aggregation, AML address screening, affiliate fee collection via on-chain router, and cross-chain transaction tracking through a partner management dashboard.

A REST API suite for programmatic access to BigONE exchange services. Covers four service areas: spot trading, wallet and asset management, instant conversion, and contract/derivatives trading. Uses JWT authentication and WebSocket streams for real-time market data and order updates. OpenAPI specifications are publicly available via GitHub.

APIs for staking workflows and rewards data across multiple blockchain networks, allowing developers to integrate staking functionality into their applications with standardized endpoints.

Marlowe is a domain-specific language and toolkit for creating financial smart contracts on Cardano with formal verification and automated testing capabilities.

Token Hub offers no-code Smart Token deployment and management capabilities. The platform enables developers to create, configure, and deploy programmable tokens with custom business logic through a web-based interface.

Cairo Programming Language provides a way to write programs that can prove their computations are correct without revealing the actual data. It uses Rust-like syntax to help developers create smart contracts for Starknet and build applications that need mathematical proofs of correctness. The language includes tools for testing, debugging, and generating proofs, making it simpler for developers to build trustworthy blockchain applications without deep cryptography knowledge.

Walnut Debugger is a web-based transaction debugger and simulator for Starknet smart contracts, enabling developers to inspect variable states at each execution step and simulate transactions before on-chain deployment. The tool supports source-code-level debugging via contract verification, call trace inspection, and gas profiling against the CairoVM.

Kalshi API provides REST endpoints, WebSocket connections, and FIX protocol access for algorithmic trading strategies. The system supports automated event contract trading with historical data access and real-time market feeds.