List of Developer Tooling companies in Web3 (2026)

Solana Actions is a specification-compliant API framework that returns signable transactions on the Solana blockchain, enabling applications to deliver complex onchain interactions directly to users without requiring them to navigate away from their current context.

pay.sh is an API gateway that enables AI agents and CLI tools to access paid APIs using stablecoins on Solana without accounts, API keys, or subscriptions. A CLI wrapper detects HTTP 402 payment challenges via x402 and Machine Payments Protocol (MPP), authorizes payments through a connected wallet, and retries requests with payment proof. A searchable catalog indexes API providers across categories including AI/ML, compute, data, and communications, enabling agents to discover and call services on a per-request basis.

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.

Polygon CDK is a developer toolkit for launching custom ZK-powered Layer 2 chains that are interoperable with the Polygon AggLayer ecosystem. It enables teams to build sovereign L2s with configurable data availability, sequencing, and execution environments.

x402 CLI is a command-line tool for testing x402-gated API endpoints, enabling developers to build and test onchain agent workflows including wallet operations and micropayments.

AggLayer CDK is a developer toolkit for integrating chains into the AggLayer cross-chain settlement network. It provides the technical components needed for chains to connect to the unified liquidity and interoperability infrastructure of the Polygon AggLayer.

Arbitrum Stylus is a developer tooling upgrade to Arbitrum Nitro that adds a WebAssembly (WASM) virtual machine alongside the EVM on Arbitrum One and Nova. It enables writing smart contracts in Rust, C, C++, and other WASM-compatible languages, with Stylus contracts interoperable with existing Solidity deployments through shared interfaces. WASM execution reduces gas costs for memory and compute-intensive operations compared to equivalent EVM bytecode.

AvaCloud is a managed Avalanche L1 deployment service that lets enterprises launch custom blockchains without operating validator infrastructure themselves. The platform handles validator hosting, monitoring, RPC endpoints, and software upgrades while providing compliance-aware configurations for regulated deployments. Customers retain full control over chain parameters, gas tokens, and validator sets while offloading operational overhead.

OP Stack is an open-source software stack for building Layer 2 blockchains and rollups that settle to Ethereum. Developers use OP Stack components to launch custom chains with configurable execution layers, sequencers, and data availability options while inheriting Ethereum security through fraud-proof verification. Chains built on OP Stack natively interoperate within the Superchain ecosystem through shared messaging and bridge protocols.

Actions SDK is a developer toolkit that allows applications to embed DeFi lending, borrowing, and token swap features through a single integration. It connects to established lending and exchange protocols, handles wallet interactions through supported providers, and offers configurable controls for asset allowlists, chain restrictions, and custody models. The SDK targets OP Stack chains and Ethereum mainnet, enabling non-blockchain-native teams to ship DeFi functionality without building separate protocol integrations.

TON Virtual Machine is a stack-based execution environment for running smart contracts on The Open Network. It processes asynchronous messages and compiles contracts written in FunC, Tact, and Tolk into gas-optimized bytecode. The Acton CLI provides scaffolding, testing, debugging, deployment, and verification in a single binary.

TON Connect is a standardized authentication protocol for linking wallets to decentralized applications on TON. It establishes encrypted sessions between wallet providers and dApps through a unified protocol specification. Developers integrate browser-based and Telegram Mini App wallet connections through a single SDK.

TON AgentKit is a developer toolkit for building autonomous AI agents that transact on The Open Network. It provisions dedicated agentic wallets and exposes APIs for agents to send payments, interact with smart contracts, and manage assets programmatically. Agents operate at thousands of transactions per second without human intervention.

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.

A modular blockchain development toolkit built on the Substrate framework for creating custom blockchains with access to Polkadot shared security. The SDK includes configurable consensus mechanisms, governance modules, runtime pallets, and tooling for building interoperable chains that connect to the Polkadot relay chain.

Cosmos SDK is an open-source framework for building application-specific blockchains. It provides configurable Go modules covering authentication, staking, governance, and IBC, which developers compose to define custom chain logic. Chains built with the SDK are sovereign and IBC-compatible by default, enabling connectivity across the Cosmos ecosystem.

Cosmos EVM is developer tooling that adds EVM execution capabilities to Cosmos SDK-based blockchains. It exposes Ethereum JSON-RPC endpoints and supports Solidity smart contracts alongside the standard Ethereum developer toolchain, including MetaMask compatibility. Chains using Cosmos EVM run EVM-compatible applications while retaining native IBC interoperability for cross-chain communication.

Hooks implements smart contract functionality through small WebAssembly modules that execute before and after XRPL transactions. The system enables logic execution on accounts while maintaining the ledger's performance characteristics through efficient code deployment.

Stellar Smart Contracts is a Rust-based smart contracts platform integrated with the Stellar blockchain that compiles and executes contracts in WASM through a runtime with multi-core scaling and an optimized fee model. Developer tooling includes plug-and-play SDKs, a CLI, an RPC server, and a local sandbox environment. The platform supports state archival, Secp256r1 passkey verification, and BLS12-381 cryptographic operations.

Stellar Disbursement Platform (SDP) is an open-source bulk payment solution that lets organizations disburse Stellar-native payments to thousands of recipients in a single workflow. The platform supports global payroll, vendor payments, and humanitarian aid distribution through CSV-based recipient lists, KYC integration, and SMS-based wallet delivery. Settlement happens directly on the Stellar network for real-time confirmation.

Chainlink VRF generates verifiable random numbers for smart contracts through cryptographic proof mechanisms published and verified onchain. The system prevents tampering by oracle operators, developers, or miners through cryptographic verification of random value generation. VRF v2.5 supports subscription-based and direct funding payment models with LINK or native tokens.

Chainlink Automation executes smart contract functions through decentralized oracle networks monitoring onchain conditions and time-based triggers. The system automates transaction execution without centralized infrastructure, uses the same node operators securing Chainlink data feeds, and enables developers to offload operational maintenance for protocol automation workflows.

Chainlink Functions provides smart contracts with trust-minimized compute infrastructure for API data retrieval and custom computation execution. The system operates through decentralized oracle networks that execute source code in serverless environments, aggregate independent results through consensus, and support threshold-encrypted secrets for authenticated API access.

Chainlink Runtime Environment is an orchestration layer for institutional smart contracts enabling data connectivity, compliance, privacy, and cross-chain interoperability. The system compiles workflows into WebAssembly binaries executed across decentralized oracle networks, uses Byzantine Fault Tolerant consensus for operation verification, and supports Go and TypeScript SDK development.

Chainlink Runtime Environment (CRE) is a developer platform that lets builders compose modular oracle capabilities into custom cross-chain workflows using Go, TypeScript, and other languages. It re-architects Chainlink's platform into purpose-built decentralized oracle networks (DONs) per capability, coordinated through DON-to-DON communication. CRE enables institutional-grade smart contracts to operate across public and private blockchains with built-in compliance and privacy support.

Chainlink Privacy Standard is a developer framework that enables private smart contracts on public and private blockchains by combining trusted execution environments (TEEs), zero-knowledge proofs, and the DECO protocol. It provides confidential computing through Chainlink Confidential Compute, selective disclosure for regulatory compliance, and cross-chain private transaction support via CCIP. Institutions use the standard to protect trade logic, tokenized asset metadata, and KYC credentials while remaining auditable to designated counterparties.

NEAR AI provides infrastructure for autonomous agent deployment including encrypted model execution through Trusted Execution Environments, verifiable compute mechanisms, and multichain action capabilities. The platform enables AI agents to own assets, execute transactions, and process private data without on-chain exposure while maintaining cryptographic verifiability.

Aave Kit is a developer toolkit that provides permissionless programmatic access to Aave's onchain liquidity, letting developers integrate supply, borrow, and yield functionality into their own applications with a small amount of code. It exposes hooks for adding yield, unlocking borrowing against a user's holdings, and previewing health factor and risk premium before a transaction is signed. The toolkit works across multiple blockchain networks through a single integration rather than requiring separate implementations per chain.

AlgoKit is a developer toolkit for building decentralized applications on Algorand. It provides native TypeScript and Python smart contract development with CLI tools for project scaffolding, local blockchain testing, automated deployment, and a visual debugger. The toolkit includes LORA, a web-based explorer for inspecting on-chain accounts, transactions, and applications during development.

BeaconKit implements modular consensus infrastructure through CometBFT integration, enabling EVM-identical blockchain development with customizable validation. The system provides single-slot finality while supporting alternative consensus mechanisms.

OKX API is a developer platform providing REST and WebSocket endpoints for cryptocurrency trading and market data access. It supports order placement across spot, margin, and derivatives markets, account management, and streaming market data, alongside software development kits and documentation. Market makers, brokers, and application developers use it to integrate trading and data functionality into their own systems.

A set of APIs and developer tools including Swap (Classic, Fusion, Fusion+), Portfolio API, Web3 RPC, security endpoints, and data APIs for tokens and pricing.

1inch Business is a set of APIs and software development kits that give developers programmatic access to token swaps, orderbook data, balances, pricing, portfolio analytics, and RPC node endpoints. Developers integrate these APIs to build trading, wallet, and agentic applications without operating their own infrastructure. The suite covers multiple blockchains and supports API key or OAuth-based authentication.

DCAP Dashboard automates onchain collateral upkeep for Intel SGX and TDX attestation workflows through smart contracts deployed across multiple EVM networks. The platform continuously fetches, validates, and refreshes DCAP collateral files including PCK certificates, TCB info, and CRLs, preventing silent attestation failures as upstream certificates expire or are revoked. It provides a unified interface for monitoring collateral health across validator networks, rollups, and AI agent infrastructure, backed by Automata's TEE Attestation SDKs and Multi-Prover AVS.

Rollup-as-a-Service is a platform that enables enterprises to deploy custom Layer 2 rollups on Ethereum within minutes, providing enterprise-grade infrastructure with 24/7 monitoring and Web3 service integrations.

A transaction relay service that submits user requests to supported EVM networks and enables gasless or ERC‑20–paid execution via a cross‑chain Gas Tank. The SDK and API handle submission from off‑chain to on‑chain with fast inclusion and no downtime.

An ERC‑4337 bundler with support for verifying and ERC‑20 paymasters plus a unified Gas Tank on Polygon for multi‑chain sponsorship. It settles exact gas post‑execution, removes prefunding, and returns enhanced user operation tracking with real‑time status updates.

A verifiable randomness service for smart contracts. Requests are processed via Gelato Web3 Functions, with network‑specific fee premiums charged as a percentage of gas.

Fee Collector is a protocol fee aggregation service that automatically collects fees in any ERC-20 token and converts them to USDC daily. Protocols using Gelato's Paymaster & Bundler can activate fee collection in one click, eliminating manual token swaps and consolidating fragmented balances across chains into a single, stable USDC balance for simplified revenue reporting and accounting.

Crossmint Authentication provides user identity verification through email, social media logins, and wallet connections. The system enables progressive onboarding flows and integrates with the wallet infrastructure for identity management. Developers use it as a user management layer tightly tied into other Crossmint products.

Taproot Assets allows issuing and transferring tokenized assets on Bitcoin, using Taproot for scalability and compatibility.

Jupiter Plugin provides an open-source embeddable swap interface enabling developers to integrate Jupiter's swap functionality with minimal code. The toolkit supports multiple display modes, custom configurations, referral programs, wallet passthrough, and transactions without requiring developers to run their own RPC infrastructure. Developers implement token swapping capabilities through standardized integration patterns.

Klein is a node installation and management tool for Cosmos ecosystem blockchains that simplifies deploying validator and full nodes through a user-friendly dashboard. Instead of command-line workflows and manual server operations, operators use Klein to install, run, and control Cosmos AppChain nodes without writing code. The tool emphasizes privacy by not collecting or storing personal or node-related information.

AgentKit is a developer framework that enables AI agents to interact with blockchain networks through secure wallet management and onchain capabilities. It provides a wide range of blockchain actions across multiple wallet providers while remaining compatible with various AI models and development tools. Developers use it to build autonomous agents capable of holding assets, executing trades, and interacting with smart contracts.

Chainlist is a reference directory of EVM-compatible blockchain networks providing chain IDs, native currency details, and public RPC endpoints. Users browse available networks and add them directly to compatible wallets with a single action. Developers reference the data for standardizing network integrations.

meson.to is a developer SDK that lets web3 applications accept stablecoin deposits from any supported blockchain directly into their own smart contracts. It offers link-based, JavaScript SDK, and API integration methods, embedding a branded cross-chain interface within a host application. The toolkit routes transfers through the underlying cross-chain swap protocol, handling signature verification and transaction routing, while requiring host contracts to implement a specific deposit method to receive funds. It is used by developers who want to accept multi-chain deposits without building their own bridge infrastructure.

OVault extends the ERC-4626 tokenized vault standard with omnichain functionality, enabling users to deposit assets from any supported chain and receive yield-bearing vault shares on their preferred network. The system uses a hub-and-spoke architecture where the vault resides on a single hub chain while users interact from any spoke chain through LayerZero messaging. Share tokens implement the OFT standard for cross-chain composability, and the OVault Composer orchestrates multi-step deposit and redemption operations across chains.

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.

DeFi API is an API platform that provides unified access to multiple decentralized finance protocols and applications. It enables developers to integrate DeFi functionality including token swaps across chains, liquidity provision, and interaction with various DeFi projects through standardized endpoints.

A developer toolkit to build, test, deploy, and run custom blockchain data indexers and GraphQL APIs on the SubQuery Network, helping developers deliver fast, flexible data for dApps.

Filecoin Virtual Machine provides smart contract functionality on the Filecoin blockchain, enabling developers to deploy programmable storage applications and automate storage deals through code execution.

Wormhole SDK is a developer toolkit for building cross-chain applications through a unified interface covering multiple blockchains. It simplifies cross-chain transactions by automatically handling network-specific requirements such as gas fees and signature formats. Developers use it to integrate Wormhole's messaging and transfer capabilities into their own applications.

Solana App Kit is a React Native mobile development framework with modular architecture, enabling iOS and Android application creation with multiple protocol integrations. The system provides pre-built components for wallet integration, token trading, NFT management, and real-time blockchain data access.

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.

Core smart contract infrastructure consolidating liquidity across all Fluid protocols, enabling seamless capital flow between lending, borrowing, and trading functions through automated supply/borrow operations.

GM-Deploy is a developer toolkit that lets users create NFTs, deploy smart contracts, and perform batched on-chain actions without writing code. Its 7-in-1 deployer bundles several common contract deployment actions into a single transaction flow, while an integrated AI studio generates artwork and metadata for new NFT collections. The toolkit is aimed at users who want to test wallets, generate on-chain activity, or launch NFT collections across multiple supported networks.

AI agent development framework that enables secure, autonomous on-chain actions and DeFi operations. Integrates with various AI frameworks and supports Model Context Protocol (MCP) for building blockchain-capable AI agents.

Dash Platform implements a decentralized API and data storage layer through Drive and DAPI components, enabling application development on the Dash network. The system provides developer SDKs while maintaining security through the masternode infrastructure.

Arc is an open-source tokenization engine providing modular infrastructure for RWA onboarding and compliance automation. The system integrates KYC verification through Parallel Markets and zkME, AML monitoring capabilities, smart account custody via ZeroDev integration, and automated yield distribution linking offchain banking streams to tokenized asset positions through configurable compliance modules.

Plume Portal is a unified dashboard interface for RWA ecosystem interaction and position management. The application provides asset discovery functionality, yield optimization tools, cross-protocol reward tracking, and gamified engagement mechanisms including quest systems, leaderboards, and points programs to facilitate user participation across DeFi applications deployed on Plume infrastructure.

Subgraph Studio is a development platform for building, testing, and deploying subgraphs to The Graph Network. The system provides API key management, billing integration, and testing environments for developers creating blockchain data APIs.

Orderly Trading Infrastructure is a white-label orderbook infrastructure that provides shared liquidity across multiple blockchains. It enables developers to build spot and perpetual futures trading platforms with centralized exchange-level order matching performance and non-custodial, on-chain settlement. It is used by decentralized exchange builders and trading teams integrating trading functionality into their products.

A platform that enables users to create their own perpetual contract DEX in minutes without coding, providing customizable trading interfaces with built-in liquidity and professional infrastructure.

OneClickConnect is an open-source JavaScript and TypeScript library providing a standardized transport-layer protocol for connecting decentralized applications to wallets in the NEAR ecosystem. The library handles wallet detection and message routing automatically without private key exposure or manual provider selection. It is compatible with Wallet Selector and supports React and React Native environments.

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.

A development toolkit that enables dapp integration with MetaMask across multiple platforms. The system provides authentication, transaction handling, and contract interaction capabilities for Web3 applications.

An open-source plugin system that extends MetaMask functionality through custom integrations. The system enables developers to add support for new networks, account types, and APIs within the wallet environment.

MetaMask Smart Accounts Kit is a development framework implementing ERC-4337 account abstraction and ERC-7715 advanced permissions, enabling creation of smart contract accounts with programmable delegation rules, batch transaction execution, gas abstraction through paymasters, and granular permission sharing for automated actions without repeated user confirmations.

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.

Stakely Staking API is a developer integration product that lets institutions orchestrate staking flows across multiple blockchains through a single REST interface. It supports delegating, unstaking, claiming rewards, and automating recurring staking operations while transactions remain signed client-side, keeping private keys outside Stakely's environment. The product is built for institutional clients and custodians that need to embed staking into their own platforms without building infrastructure from scratch.

The Stakely Multicoin Faucet is a community tool that distributes small amounts of test tokens to cover transaction fees on supported blockchains. Users request tokens through the faucet interface to explore new networks and test transactions without needing to acquire assets elsewhere. It serves developers and users experimenting with blockchains supported by Stakely's other services.

HyperIndex is a multi-chain indexing framework that turns on-chain events into structured data with a queryable API. It supports real-time indexing, multi-chain configurations, and schema-driven development across EVM and Fuel.