List of Developer Tooling companies in Web3 (2026)

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

CoinCraddle API is a developer API that lets cryptocurrency exchanges, wallets, payment services, and other crypto projects embed swap functionality into their own applications. It provides access to the same aggregated liquidity as the CoinCraddle Exchange and lets integrators configure their own fee structure, with payouts available in BTC or USDT. The API supports fixed and floating rate quotes and swap creation and status endpoints for automated integrations.

Roqqu API Services is a developer platform providing programmatic access to Roqqu's crypto payment infrastructure for businesses. It exposes endpoints for generating addresses, checking transaction status, and sending or receiving tokens across multiple cryptocurrencies through HTTP requests. Businesses use it to embed crypto address generation and payment processing into their own applications.

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.

BigONE API is a REST API suite providing programmatic access to BigONE exchange services. It covers spot trading, wallet and asset management, instant conversion, and contract or derivatives trading through predictable HTTP endpoints. The suite uses token-based authentication and WebSocket streams for real-time market data and order updates, with open specifications published for developers.

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.

CosmES is an open-source developer library for building applications on Cosmos-based blockchains. It provides developers with tooling to query chain data and interact with smart contracts when building decentralized applications within the Cosmos ecosystem. The library is maintained and published by Coinhall for external developers to integrate independently of the Coinhall trading terminal.

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

Bonsai is a decentralized proving engine that allows developers to integrate ZK proofs into applications.

Steel enables developers to run Solidity contracts in RISC Zero's zkVM. It uses off-chain execution with on-chain verification to reduce gas costs and enhance smart contract capabilities.

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.

D3 Integration provides partner integration options for domain token sales through three methods. The system offers affiliate link generation for basic redirects, customizable widgets for embeddable interfaces, and comprehensive APIs for full application integration. Developers implement these tools to incorporate domain name searching, purchasing, and management into existing platforms. The suite supports multiple blockchains while maintaining standard domain functionality.

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 SDK that provides developers with tools to build ERC-4337 and EIP-7702 smart wallets. It features Safe Account integration, user operation construction, gas sponsorship through integrated paymaster services, transaction bundling, social recovery, and a reference mobile wallet that demonstrates 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.

31Third Swap API is a developer-facing API for programmatic execution of token swaps and batch trades across supported blockchains. It provides endpoints for asset data, swap quotes, basket trades covering multiple assets in a single call, and quote refreshes, letting developers integrate execution directly into their own applications. Builders use it to embed the protocol's liquidity aggregation and batch trading logic into custom trading, treasury, or automation tools without building an execution interface themselves.

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.

GhostLogs is a developer tool that adds custom gasless events and new view functions to existing smart contracts without changing the original code, with an in‑browser IDE and data export integrations.

The Privily Developer SDK and MCP Plugin are integration tools that let developers and AI agents embed Privily's private, multi-chain payment operations into their own applications, backends, or agent workflows. The SDK exposes deposit, trade, send, request, and pay operations for apps and backends, while the MCP plugin exposes the same operations through the Model Context Protocol so AI agents can move funds on a user's behalf. Both surfaces build on the same underlying appchain account and privacy infrastructure as the main application. They are distributed as separate installable packages usable independently of the consumer app.

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.

Lakebase is a serverless Postgres database integrated with the Databricks Data Intelligence Platform, built for transactional workloads behind data applications and AI agents. The database separates compute from storage, allowing autoscaling with scale-to-zero, instant branching for isolated development environments, and point-in-time recovery, while synchronizing with analytics tables in the lakehouse. It supports standard Postgres extensions, exposes an API for application access, and registers as a governed object within the platform's unified catalog.

Lakewatch is an agentic security information and event management platform built on the Databricks Data Intelligence Platform for enterprise security operations. It unifies security telemetry, IT logs, and business data under a single governance layer to support large-scale threat hunting and AI-driven defense. Security logs are ingested through automated pipelines, and AI agents triage, investigate, and respond to threats at machine speed, with governance and access control applied across all security data through a unified catalog layer.

SwapKit is a cross-chain swap SDK and REST API for integrating non-custodial multi-chain trading into wallets, DEXs, and platforms. It aggregates liquidity from several cross-chain protocols and DEXs, routing transactions across multiple blockchains with a single user signature. It supports DEX aggregation, address screening, affiliate fee collection through an on-chain router, and transaction tracking in a partner dashboard.

The EVAA SDK is a developer library for programmatic integration with the EVAA lending protocol on the TON blockchain. It exposes methods for querying pool state, user positions, and interest rate data, and for executing deposit, borrow, repay, and withdrawal operations, while also handling the collection and serialization of oracle price packages required by the smart contracts. It is distributed independently on its own repository and documentation site, separate from the main EVAA application, and is used by developers building liquidation bots or third-party integrations.

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.

Plinth is a programming language for Cardano smart contracts based on a restricted subset of Haskell, enabling formally verifiable on-chain logic development.

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.

Garaga provides efficient elliptic curve operations and SNARK verification for Cairo and Starknet through optimized modular arithmetic circuits. Users can verify Groth16 and Honk proofs on-chain, perform multi-scalar multiplication across multiple curves, execute pairing operations for BN254 and BLS12-381, and verify ECDSA, Schnorr, and EdDSA signatures. The system enables smart contract verifier generation for various proof systems and provides maintained contracts for RISC Zero, SP1, and drand verification.

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.

Walnut EVM is an open-source transaction debugger and simulator for EVM-compatible chains, supporting Ethereum, Arbitrum, Base, Optimism, Linea, and Katana. The tool traces transaction execution, enables re-simulation with custom calldata, and provides gas profiling; it can be self-hosted against any debug-capable RPC endpoint.

Cairo Playground is a browser-based interactive environment for exploring the CairoVM and writing Cairo code, allowing developers to experiment with Cairo, Sierra, and CASM with step-by-step execution debugging. The tool is hosted on cairovm.codes and targets Starknet and Cairo developers who want to prototype or test contract logic without a local setup.

Lineth is an open-source zero-knowledge rollup stack that developers use to build scalable Ethereum-based networks. It provides the underlying framework and tooling for launching custom rollups rather than being a single deployed chain itself. The project is maintained under the Linux Foundation Decentralized Trust umbrella alongside other Consensys-originated infrastructure tools.

Constellation implements unified API access through SDK integration, enabling developers to interact with decentralized AI subnets. The platform provides client libraries for accessing language models, data collection services, and scientific computing resources across the Bittensor network.

Apex is a conversational AI through subnet 1 infrastructure, enabling agentic workflows with tool access and chain-of-thought reasoning. The system provides OpenAI-compatible endpoints while maintaining decentralized model execution through miner competition.

Macrocosmos SDK implements developer tools through Python and TypeScript libraries, enabling integration with decentralized AI subnets. The toolkit provides client interfaces for Apex, Gravity, and Mainframe services with standardized API access patterns.

Fine-Tuning implements model optimization through subnet 37 infrastructure, enabling specialized model adaptation and performance enhancement. The system provides competitive mechanisms for improving model capabilities through targeted training approaches.

Pre-Training implements large language model training through subnet 9 infrastructure, enabling distributed model development and optimization. The system coordinates computational resources for training state-of-the-art language models through competitive incentive mechanisms.

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.

Nite Interface SDK is a developer toolkit that provides smart contracts, Dusk API access, wallet builder, and payment rails for building apps and clients on the Nite Protocol.

BitGifty Enterprise API is a REST API suite that enables platforms to integrate crypto gift card and crypto spending services into their own applications. The Crypto Gift Card API supports bulk gift card creation and distribution, white-label customization of email templates and redemption flows, real-time transaction tracking via webhooks, and both mainnet and testnet environments. The Crypto Spend API allows third-party applications to offer mobile airtime top-ups, utility bill payments, and brand gift card purchases to users paying with cryptocurrency.

Bity Trading is a Swiss brokerage and execution desk for large cryptocurrency transactions. It negotiates and settles large orders off-exchange through trusted counterparties, reducing market impact and slippage for asset managers, private banks, high-net-worth individuals, and corporations. The service also provides programmatic access to fiat-to-crypto, crypto-to-fiat, and crypto-to-crypto exchange execution for partners integrating the underlying trading capability. As a regulated Swiss financial intermediary, it handles compliance and settlement while keeping client data processed in Switzerland.

Longswipe for Business is a merchant platform enabling businesses to accept Longswipe vouchers as a form of checkout or payment with instant settlement into a preferred currency. Merchants create dedicated accounts to manage voucher redemption, appoint collectors who redeem vouchers on their behalf across multiple currencies, and integrate voucher-based checkout using software development kits for web, mobile, and desktop applications. The platform is aimed at event organizers, point-of-sale operators, and online merchants seeking cross-border payment acceptance without traditional exchange fees.

Klink Offer Integration API is a business-facing affiliate offer network platform that lets apps, games, and platforms embed partner offers to monetize their user base. Publishers integrate the offer inventory through a web-based iframe or a modular API, letting advertisers pay only for verified user actions such as installs, sign-ups, or purchases. The service manages offer publishing, deep-link routing, conversion tracking, geofencing, and localized payouts, and rewards can be issued as in-app currency, points, or tokens.

Flutterwave API is a payment processing API that enables businesses to accept payments from customers and send money to others through multiple payment methods including card payments, direct debit, bank transfers, and mobile money across African and global markets.

Flutterwave FaaS is a developer infrastructure platform that enables companies to embed financial services into their applications through unified APIs, providing KYC verification, account opening, branded debit card issuance, payment processing, and account servicing capabilities with built-in regulatory compliance and security.

Telegram-based monitoring service tracking validator node health, delegation status, commission changes, and lock-up cycles with instant notification delivery. The bot enables users to monitor multiple validators and delegations, receiving alerts for network issues, validator performance changes, and staking cycle events.

Unified Web3 development platform that consolidates APIs, SDKs, smart contract deployment, custodial wallet services, gamified learning through Vottun Journey quests, and code-to-earn incentives for developers building dApps and blockchain solutions.

x402-secure is an open-source SDK and proxy that adds verified identity, intent checks, and agent‑native risk controls to x402 payments, powered by Trustline risk analysis.

Sui Move Analyzer is a Visual Studio Code extension providing syntax highlighting, code completion, navigation, diagnostics, and framework integration for Move smart contract development on Sui blockchain.

Aptos Move Analyzer is a Visual Studio Code language server extension offering syntax highlighting, intelligent completion, navigation tools, and real-time diagnostics for Move development on Aptos blockchain.

Aptos Move Formatter is a code formatting tool developed in collaboration with Aptos Labs that automatically formats Move source code according to configurable style guidelines.

Move Web IDE is a browser-based integrated development environment for writing, testing, and deploying Move smart contracts without local installation requirements.

Sui Contract Source Verifier is a tool enabling developers to verify that deployed smart contract bytecode matches published source code on Sui blockchain.

cc-vrf is a permissionless verifiable random function service for Solana applications. It generates randomness on-chain using the RFC 9381 ECVRF standard, and every roll publishes a proof that anyone can check. Games, lotteries, and other dApps integrate it through client libraries at a low cost per call, without relying on an operator to report outcomes.

Esper provides browser-based verification tools for contributing authenticated web data to AI agents. The system uses cryptography and secure hardware to create verifiable information without compromising user privacy.

HelloMoon Developer Platform is a developer tooling suite that provides blockchain infrastructure through APIs, RPC endpoints, and real-time data streaming. It gives developers access to standard and dedicated RPC nodes, gRPC streaming, and a transaction landing service that submits and accelerates settlement of transactions, charging only on successful delivery. The platform supports NFT analytics, DeFi monitoring, and cross-chain data access for teams building applications across multiple blockchain networks. Dedicated, premium-hardware nodes are also available for latency-sensitive or high-throughput workloads.

Sen Hub provides development infrastructure for Solana DApps through an integrated platform that enables application deployment, testing, and distribution. The system offers developer toolchains, sandbox testing environments, and marketplace distribution through Sen Store.

Storage Proof API provides developers with programmatic access to generate and verify storage proofs within applications. The API abstracts cryptographic complexity and integrates storage proof validation logic through a well-defined interface, allowing applications to implement cross-chain data verification without specialized knowledge of proof systems.

Herodotus Data Processor implements a framework for defining data sets and executing verifiable computations over blockchain data. The system uses STARK proofs and storage proofs to validate computation correctness, enabling applications to perform complex data processing while maintaining cryptographic integrity across blockchain networks.

Integrity Verifier implements STARK proof verification directly on Starknet for Layer 3 scalability. The system enables efficient validation of cryptographic proofs within the Starknet ecosystem, allowing developers to build advanced trust-minimized applications with enhanced verification capabilities on the network.

Noir is a domain-specific language for creating zero-knowledge proofs. Noir enables developers to build private applications while maintaining compatibility with public blockchain infrastructure.

Sandbox is a local development environment that enables developers to build and test privacy-focused smart contracts. The Sandbox simulates Aztec's Layer 2 functionality, allowing for experimentation with private and public execution environments.

Scrypto implements asset-oriented programming through Rust-based smart contract language, providing native asset primitives and blueprint deployment system. The framework enables secure DeFi development with built-in resource management and developer royalties.

MiniPay Mini Apps is a developer platform that lets third parties build and distribute web applications running inside MiniPay's in-app browser. Developers submit apps that gain instant access to a user's wallet and the underlying blockchain network without requiring separate onboarding or browser extensions. The platform provides wallet connection, transaction signing, and custom methods such as exchange rate lookups and QR scanning, enabling use cases including bill payments, prediction markets, vouchers, and games distributed to the wallet's user base.

A developer toolkit enabling businesses to integrate cryptocurrency payment acceptance through the Beans platform. The SDK generates QR code payment requests, supports multi-currency transactions with automatic conversion, processes instant settlements, and provides webhook notifications for payment confirmations. Merchants can deploy point-of-sale systems, e-commerce integrations, or custom payment flows while accessing Beans network liquidity without managing individual on-ramp partnerships.