Best Developer Tools APIs in 2026

Application error monitoring, performance tracking, and alerting.

Manage repos, issues, PRs, actions, and user data on GitHub.

Manage projects, pipelines, merge requests, and deployments.

Manage CI/CD pipelines, builds, and deployments.

Open-source integration platform. OAuth + data sync for 400+ APIs. One SDK, every integration.

250+ tools and integrations purpose-built for AI agents. Single SDK to connect GitHub, Slack, Gmail, Linear, Jira, and more.

Agent-native tool platform. Authenticated tools for AI agents with per-user OAuth handled by Arcade.

API aggregator designed for AI agents. Unified interface across 100+ SaaS APIs with agent-native auth.

Pre-built tools marketplace for LLM agents. Add tools with a single line and manage them through one dashboard.

Unified API for HRIS, ATS, CRM, accounting, file storage, and ticketing. One integration covers 200+ SaaS tools.

Unified employment API. One integration for payroll, benefits, HRIS, and employment data across 200+ providers.

Unified APIs for CRM, Accounting, HRIS, File Storage, Ecommerce, and more. Single integration across 100+ SaaS vendors.

Unified API for accounting, commerce, and banking data. Feeds SMB data into fintech and lending products.

Marketplace of 40,000+ APIs accessible through a single API key. Each listed API proxies through RapidAPI's gateway.

Deploy and manage frontend applications and serverless functions.

Deploy sites, manage builds, and configure serverless functions.

Feature flag management for controlled rollouts and experimentation.

Real-time collaboration features: presence, cursors, and comments.

Manage container images, repositories, and automated builds.

Search, publish, and manage JavaScript packages.

API testing, documentation, monitoring, and collaboration.

Manage Terraform workspaces, runs, and state remotely.

Access Figma files, components, and design tokens.