List of Developer Tooling companies in Web3 (2026)

Uphold Developer API is a REST API that lets developers integrate Uphold's trading, account, and authentication functions into their own applications. It exposes core endpoints for account management and asset movement along with reference documentation and quickstart guides for building custom integrations. It is distinct from the enterprise onboarding suite in that it targets developers building direct code-level integrations rather than turnkey embedded-finance programs.

Prime SDK is a development toolkit that removes Web3 usability barriers by providing ERC-4337 account abstraction infrastructure. The SDK enables developers to build applications with gasless transactions, transaction batching, and cross-chain functionality across multiple EVM networks.

Modular SDK is an ERC-7579 development toolkit that enables customizable smart accounts through modular architecture. The SDK allows developers to enhance security and user experience by integrating various modules for account functionality and supports EntryPoint 0.7.0.

TransactionKit is a React library for Web3 development that enables transaction batching, cross-chain functionality, and gasless transactions. The library allows frontend developers to integrate smart account features without deep blockchain knowledge through React components.

Skandha is an ERC-4337 compliant bundler service that collects multiple UserOperations and combines them into single transactions to reduce gas costs. The TypeScript bundler supports EIP-7702, EntryPoint versions 0.6, 0.7, and 0.8, and provides built-in MEV protection with shared mempool functionality.

Arka Paymaster Service is an open-source ERC-4337 compliant paymaster that enables sponsored and gasless transactions. The service allows users to pay gas fees with stablecoins and enables projects to cover transaction costs for their users through smart account sponsorship.

deBridge Liquidity Network is a cross-chain and same-chain trading infrastructure that provides fast, capital-efficient swaps with guaranteed rates. Users specify desired outcomes through orders, which professional solvers fulfill competitively by supplying tokens on destination chains immediately and later claiming source tokens, all secured by the underlying messaging layer. The network operates on a zero-TVL model without traditional liquidity pools, enabling near-instant settlement, zero slippage, and delivery of native rather than wrapped assets. It is accessible through a trading interface, an API for custom integrations, and an embeddable widget.

dePort is a native bridge for assets that lets protocols deploy synthetic representations of their tokens across multiple blockchain networks using a lock-and-mint model. Native tokens are locked in a smart contract on the source chain while corresponding synthetic assets are minted on destination chains, with total minted supply always fully backed by the locked collateral. The system supports automatic listing, so any token can be bridged without prior approval, and it can also serve as a canonical custody bridge for chains connected through deBridge infrastructure services. It is built on the underlying messaging protocol and targets token issuers and protocols seeking multi-chain presence without wrapped-asset risk.

DODO Trading Widget provides developers with customizable trading and cross-chain swap functionality for integration into dApps through a user-friendly interface without building from scratch.

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.

Sphere API is a developer toolkit providing RESTful endpoints and SDKs for embedding global stablecoin payments into third-party platforms. It supports payment processing, fiat and crypto conversions, and multi-chain transfers, allowing businesses to build on-ramp, off-ramp, and settlement functionality without extensive engineering. The toolkit is used by platforms seeking to embed payment rails across multiple blockchains and stablecoins.

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.

Mayan SDK is a developer library that lets wallets, decentralized applications, and marketplaces integrate cross-chain swap functionality directly into their own interfaces. It exposes Mayan's underlying transfer methods and automatically routes each transaction to the optimal one based on asset type, size, and destination chain. An optional referral fee mechanism allows integrators to earn revenue on swaps executed through their implementation.

Mayan Widget is an embeddable interface component that adds a cross-chain swap experience to any website through a short code snippet. Developers configure supported chains, token lists, referral addresses, and visual styling through a no-code builder. The widget runs Mayan's underlying routing protocols to execute transfers across multiple blockchains directly from the host site.

Hyperlane CLI is a command-line developer tool for deploying and managing Hyperlane contracts across supported blockchains. It lets developers deploy core protocol contracts, configure and send transfers through warp routes, and manage cross-chain application configurations from a terminal. The tool supports transfers between many virtual machine environments, including EVM-compatible chains, Solana's runtime, and Cosmos-based chains.

Hyperlane SDK is a TypeScript development framework for building interchain applications, providing MultiProvider utilities, deployment abstractions, and contract interaction tools for cross-chain development workflows.

Autoscout is a self-service deployment platform enabling users to launch customized block explorers for EVM-compatible chains within minutes. The system provides hosted infrastructure, automatic updates, and configuration options for testnets, rollups, and production mainnets.

SORA Nexus is a blockchain framework built on a deterministic runtime that executes verifiable logic across parallel processing lanes which merge back into a single canonical ledger, avoiding fragmentation into separate chains. It bridges institutional payment messaging standards to on-chain settlement, allowing banks, central banks, and regulated institutions to interact with programmable money and on-chain markets through familiar messaging formats. The framework extends beyond financial state changes to include networking and storage layers supporting applications, APIs, and media delivery on the same governed infrastructure. It targets central bank digital currency implementations and decentralized finance applications with fast finality and privacy-preserving proof mechanisms.

Move Code Playground is a browser-based integrated development environment for the Move programming language, enabling developers to write, test, and deploy smart contracts without local setup. The platform supports Aptos and other Move-based blockchain development.

IntelliJ Move IDE Plugin is an integrated development environment extension for JetBrains IDEs that provides Move language support, syntax highlighting, code completion, and debugging capabilities for Move smart contract development.

ByteBabel is a transpiler that converts Solidity smart contracts to Move bytecode, enabling Ethereum Virtual Machine compatibility with Move-based blockchains. The system facilitates cross-VM development and application portability between EVM and Move ecosystems.

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.

IOTA Notarization is a toolkit for creating and managing tamper-proof records on IOTA, currently available as an alpha release.

IOTA Developer Toolkit is a collection of SDKs, APIs, CLIs, and frameworks for building applications on IOTA, including the dApp Kit and API references.

EigenDA is a data availability layer that provides verifiable, high-throughput storage for rollups and other applications. It posts and verifies data blobs at scale, offering substantially higher capacity than base-layer alternatives while remaining backed by staked capital. Developers use it to reduce data costs and latency for rollups and other applications requiring frequent onchain data posting. It draws its security guarantees from the underlying restaking protocol.

MPC Hot Signer is a containerized transaction signing service for enterprise operators integrating with the Bron platform. Deployed via Docker or Kubernetes, it connects to the Bron API using dedicated API keys and stores encrypted MPC shards in a PostgreSQL database. Supports AWS KMS, Google Cloud KMS, Azure Key Vault, and local master password encryption for shard protection. Includes built-in Prometheus metrics for operational monitoring. Functions as an automated alternative to the Bron desktop application for non-interactive transaction signing workflows.

Changelly API enables developers to integrate cryptocurrency exchange functionality into applications through REST endpoints. The API supports both centralized exchange aggregation and DeFi swap routing, providing access to Multiple cryptocurrencies across various blockchains. Implementation includes exchange rate queries, transaction initiation, and order status tracking, with authentication via API keys and optional custom fee structures for API partners.

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.

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.

A secure operations platform for smart contract development that enables secure automation, monitoring, and management of blockchain applications across 30+ networks.

Token Bundler is a smart contract tool that lets users combine multiple ERC-20 and NFT tokens into a single bundled asset for use as collateral in a loan. It is accessed as a tool within the PWN Protocol application rather than through its own interface, and operates through an on-chain contract deployed alongside the core lending protocol. The bundler enables borrowers to pledge diverse holdings as one unified collateral position, increasing flexibility for peer-to-peer loan structuring.

Bitkub API is a developer tooling offering that lets external applications integrate with Bitkub Exchange trading and account functions through RESTful endpoints. It provides market data access, order placement and management, and secure key-based authentication for automated trading systems. Developers generate API keys through a self-service management dashboard and reference published documentation for integration.

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.

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.

Circles SDK offers development tools for building applications on the Circles protocol, including avatar management, trust connections, and token operations through JavaScript interfaces.

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.

OpenSea SDK provides JavaScript libraries for interacting with the OpenSea marketplace, simplifying integration of buying, selling, and bidding functions into third-party applications.

Seaport Protocol enables decentralized exchange of digital assets through a flexible system of order fulfillment, supporting advanced trading operations with optimized gas efficiency.

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.

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.

Meru API is a stablecoin infrastructure platform that lets developers and fintechs embed virtual US bank accounts, European IBANs, stablecoin on-ramp and off-ramp, global payouts, KYC and KYB checks, and digital wallets into their own products through a single API. Businesses integrate the API to build remittance, payroll, and financial products while Meru manages regulatory compliance across jurisdictions. The platform processes fiat and stablecoin payins and payouts across multiple blockchains and local payment rails.

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.

Core SDK is a developer toolkit that provides embedded wallet infrastructure and cross-virtual-machine functionality for decentralized application developers. It includes one SDK for social sign-on based onboarding and another for chain abstraction, letting developers add self-custodial accounts, aggregated balances, gasless transactions, and automated transaction execution into their own applications. The toolkit targets web, mobile, messaging mini-app, and game engine environments, allowing external dApps and rollups to interface with users and liquidity across multiple virtual machines without requiring bridging or gas payments.

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

CryptoMonitor API is a developer toolkit that lets businesses integrate cryptocurrency exchange functionality directly into their own applications. It provides programmatic access to exchange rates and order creation, with a second version adding order management, HMAC SHA256 request signing, and API key administration for authenticated access. Businesses use the API and accompanying software development kit to embed swap functionality without building exchange infrastructure themselves.

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.

Zebec SDKs are developer toolkits that let engineers integrate Zebec's streaming payment infrastructure into their own applications. They provide functions for depositing, withdrawing, initializing, pausing, resuming, and canceling continuous payment streams across multiple blockchain environments and a dedicated bridge module for cross-chain transfers. Developers use the SDKs to build custom payroll, payments, or card-funding features without building streaming infrastructure from scratch.

Dfns Wallet Entitlement Management is a governance module for setting permission controls, transaction policies, and approval workflows over digital asset operations. It lets organizations define programmable rules covering automated transfers, role-based access, quorum-based signing approvals, and allowlists that can block unauthorized actions before they reach the blockchain. The module integrates with the wallet and transaction infrastructure to enforce compliance controls across an organization's digital asset activity.

Dfns Transaction Lifecycle Management is a developer platform for orchestrating onchain transaction workflows from initiation through confirmation across many blockchains. It provides application programming interfaces for transaction simulation, decoding, broadcasting, policy-based approval routing, webhook-driven automation, retry queuing, and redundant node connectivity. The platform supports transfers, swaps, staking, contract calls, and stablecoin routing, giving teams auditability and pre-broadcast risk controls across the full lifecycle of digital asset transfers.

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.

ButterSwap is a cross-chain DEX aggregator that lets users swap and bridge tokens in a single step across multiple blockchain networks. It routes trades through a smart router that compares liquidity sources on the source, relay, and destination chains to minimize fees and price impact. The product connects to Butter Network's underlying messaging and bridging infrastructure to settle transactions across chains without requiring users to manually move assets first.

Kima SDK/API is a developer toolkit that provides a standalone backend server and a front-end transaction widget for integrating cross-chain and fiat-to-crypto transfers into applications. Developers use the middleware server to submit and process transaction requests to the protocol while the widget offers a ready-made interface for end users. The toolkit allows applications to connect directly to banking systems and multiple blockchains without building custom backend infrastructure.

Hyperbridge SDK is a developer toolkit for building cross-chain applications on top of the Hyperbridge messaging layer. It provides interfaces for sending verifiable messages between chains and reading remote blockchain state directly, along with utilities for tracking cross-chain request status across both EVM and Substrate-based chains. The toolkit includes built-in proof handling, fee quoting, and testing utilities, letting developers integrate cross-chain functionality without building custom verification logic.

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.

Solana transaction propogation software.

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.

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.

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.

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.

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.

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.