List of Developer Tooling companies in Web3 (2026)

Swapzone API is a REST API that enables third-party crypto platforms, wallets, and websites to integrate Swapzone's exchange aggregation functionality into their own interfaces. Partners access real-time swap offers from multiple exchange providers, support fixed and floating rate types, and earn a tiered revenue share per transaction based on monthly volume. An embeddable widget variant provides a customizable pre-built UI that partners add to any webpage via a code snippet, offering the same aggregation functionality without requiring custom development.

BAM implements transaction sequencing through Trusted Execution Environments (TEEs), enabling programmable block construction via custom plugins. The system operates through BAM Nodes that privately sequence transactions using hardware-based secure enclaves, and BAM Validators executing the ordered transactions. The plugin framework allows developers to define application-specific ordering logic, supporting features like priority cancellations and synchronized oracle updates.

OpenZeppelin Contracts is a library of modular and reusable smart contracts available for Ethereum-compatible blockchains in Solidity and for Starknet in Cairo, implementing standards like ERC20 and ERC721 with focus on security, gas efficiency, and best practices.

EigenDA is a data availability layer for rollups and applications, offering verifiable high-throughput data availability.

SORA Nexus is a blockchain framework built on Hyperledger Iroha v3, featuring Byzantine fault-tolerant consensus via Sumeragi protocol, deterministic virtual machine execution through the Iroha Virtual Machine, and sovereign data space partitioning with privacy-preserving zero-knowledge proofs. The system targets CBDC implementations and open DeFi applications with sub-second finality and post-quantum cryptographic security.

Independent Reserve API is a developer tooling interface that provides JSON-based HTTP and real-time WebSockets access for automated trading, market data, and account management.

GetBlock AppChain Launcher is a custom blockchain deployment services with automated infrastructure provisioning, enabling organizations to launch dedicated blockchain networks. The system provides end-to-end blockchain creation and management capabilities.

OpenSea API provides programmatic access to marketplace data and functions, allowing developers to fetch NFT metadata, create listings, and make offers through standard HTTP requests.

Socket Liquidity Aggregator API provides developers with endpoints for cross-chain bridging, token swapping, and route optimization. The system offers gas price data, token balances, bridge status tracking, and transaction building capabilities across supported networks.

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

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.

A developer toolkit providing authentication and wallet integration solutions for Web3 applications. The SDK offers embedded wallet functionality, social login integration, and support for Telegram Mini Apps. Developers implement unified wallet experiences across platforms using standardized APIs for EVM chains, Bitcoin, Solana, TON, and Cosmos networks. The toolkit handles transaction signing, key management through TEE infrastructure, and provides UI components for wallet connection flows.

Butter SDK provides developers with tools and libraries for integrating cross-chain functionality into applications, enabling easy implementation of omnichain features through standardized APIs and documentation.

Kima SDK/API provides developer tools for cross-ecosystem integration through Express server middleware and frontend widgets, enabling applications to process multi-chain transactions. The toolkit facilitates direct API connectivity between traditional banking systems and blockchain networks without backend modifications.

VeriFi is a verified distribution protocol that validates real user identity and engagement through privacy-preserving verification. The system aggregates user attributes across gaming, commerce, and social activities to enable businesses to acquire authenticated users. It provides biometric-based verification, on-chain reputation tracking, and programmable loyalty mechanisms for user acquisition and retention across AI, DeFi, and gaming applications.

Core SDK provides embedded wallet infrastructure and cross-VM functionality for dApp developers through Inception SDK for SSO onboarding and Mazerunner SDK for chain abstraction compatible with Web, Mobile, Telegram Mini Apps, Unity, and Unreal Engine environments.

Mode AI Terminal is an AI-powered interface enabling users to construct and execute blockchain transactions through natural language commands, supporting bridging, swapping, and trading operations across the Mode ecosystem.

A developer API that provides programmatic access to Rarible’s NFT and marketplace features for integration into applications.

FuseBox is a developer toolkit providing SDKs and APIs for building on Fuse Network. The platform enables account abstraction, gasless transactions, and mobile SDK capabilities to accelerate Web3 application development.

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

ICP Ninja is a web-based IDE that enables developers to build and deploy smart contracts directly to the Internet Computer mainnet from the browser without local development environment setup.

A governance system for implementing permission controls, transaction policies, and approval workflows for digital assets. Features include programmable rules for automated transfers, role-based access, and compliance controls that can prevent unauthorized actions.

xRocket API provides REST and WebSocket interfaces for cryptocurrency trading and payment processing integration. The system includes Exchange API functionality for executing market and limit orders, retrieving order books, and querying trading pair rates across cryptocurrency pairs. Pay API enables developers to create checks, invoices, subscriptions, and secure cryptocurrency transfers to Telegram users. WebSocket API provides real-time streaming of market data, account updates, balance information, and order events.

Project Yellowstone is a blockchain infrastructure suite for high-performance Solana data delivery, comprising Dragon's Mouth gRPC streaming interface for real-time account and transaction updates with intra-slot processing, Old Faithful historical archive providing decentralized access to complete Solana transaction history, Steamboat custom database indexes for optimized query performance, Whirligig WebSocket proxy for frontend connectivity, Fumarole reliable streaming service, Program Data Streams for parsed blockchain data, Shield transaction policy controls for validator selection, and Vixen parsing framework for building program-aware data pipelines.

SOON Stack provides modular rollup framework through decoupled SVM deployment, enabling developers to launch custom SVM chains on any Layer 1. The system facilitates one-click rollup deployment while maintaining interoperability through standardized interfaces.

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.

A JavaScript library that enables developers to access Element's orderbook, create buy/sell orders, and facilitate trades programmatically across supported blockchains.

Bullish Trading API suite offers REST, WebSocket, and FIX interfaces for programmatic interaction with the Bullish exchange, supporting market data access, order management, and account operations.

Bitkub API enables developers to integrate cryptocurrency trading and wallet functionality into applications through RESTful endpoints, supporting market data access, order management, and account operations. The API provides real-time price data and secure authentication for automated trading systems.

A development kit for building smart account modules that work across all ERC-7579 compliant accounts. ModuleKit provides standardized interfaces, testing frameworks, deployment scripts, and third-party integrations for module development.

An API for creating, minting, and managing ERC‑20 tokens with options such as mintable, burnable, and gasless tokens, plus metadata updates and webhooks.

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.

Hyperbridge SDK provides Solidity and TypeScript interfaces for building cross-chain applications with cryptographic security guarantees. Developers use POST requests to send verifiable messages across chains and GET requests to read remote blockchain state directly. The toolkit includes built-in proof handling, lifecycle management, gas estimation, and testing utilities for Ethereum and WebAssembly smart contract environments.

Megadata is a developer tooling framework that enables dynamic on-chain metadata attachment for digital assets deployed on EVM-compatible networks and Solana through Chromia-based storage infrastructure. The system exposes SDK interfaces for reading and writing asset metadata from existing token contracts, providing an alternative to off-chain storage for asset 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.

Parser enables no-code smart contract indexing and analytics through automated data transformation. Developers can create custom APIs and dashboards without writing code.

rhino.fi API is a cross-chain bridging service that enables developers to integrate asset transfers between 30+ blockchains through a single API.

0x Gasless API processes token trades without requiring users to hold native chain tokens, forwarding gas costs to relayers through standardized relaying mechanisms.

Velora SDK allows developers and dApps to integrate DEX aggregation functionality. The toolkit provides API access to liquidity aggregation across multiple decentralized exchanges with competitive routing.

Stargate API is a unified REST interface that enables seamless cross-chain token transfers between supported networks. The system provides transparent transaction data for verification while maintaining non-custodial asset control.

A middleware SDK providing cross-chain bridging, liquidity aggregation, and smart wallet functionality for developers building DeFi applications across multiple blockchains.

Archax Tokenisation Engine enables creation and management of digital tokens representing real-world assets through multi-chain deployment infrastructure, supporting issuance of tokenized funds, bonds, equities, commodities, and stablecoins across integrated blockchain protocols.

Pier Two Network Services is a blockchain node operation infrastructure supporting validation, oracle data feeds, and cross-chain application services across Layer 1 networks and testnet environments. The service operates full nodes providing transaction validation, data availability, and network connectivity for decentralized applications requiring persistent blockchain access without self-hosted infrastructure requirements.

Exolix API is a developer interface for programmatic access to exchange services, enabling rate queries, transaction creation, and status monitoring via REST endpoints.

Wizard is an AVS-as-a-Service platform for deploying and managing Actively Validated Services within the EigenLayer ecosystem. Provides template-based AVS contract deployment through a no-code dashboard, operator whitelisting and onboarding tools, and ongoing AVS management features for builders.

Zerion API provides developers with real-time blockchain data access through REST and WebSocket endpoints, enabling wallet balance queries, transaction history retrieval, and DeFi position tracking across multiple blockchain networks.

Sign Protocol provides omni-chain attestation infrastructure through smart contracts and APIs, enabling cross-chain verification of information. The system supports multiple blockchains while maintaining decentralized attestation standards.

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.

Airnode is serverless oracle node software enabling API providers to run first-party oracle nodes that deliver cryptographically signed data directly to smart contracts. Operators configure Oracle Integration Specifications (OIS) to map existing REST API endpoints into blockchain-compatible data formats and deploy through managed cloud infrastructure. By having API providers sign their own data at the source, Airnode establishes cryptographic attribution for on-chain oracle feeds.

A TypeScript toolkit for high-performance batch indexing of blockchain data sourced from SQD Network. The SDK provides modular architecture for data extraction, transformation, and persistence with processors for EVM and Substrate chains, typegen utilities for smart contract decoding, and support for multiple data stores including PostgreSQL, file systems, and BigQuery.