Nango

Open-source integration platform that lets you build third-party API connections as code. Integrations live in your repo, run locally for development and testing, and deploy to hosted infrastructure for production. Handles OAuth and token management for hundreds of APIs while giving developers full control via TypeScript functions and a powerful SDK.

Trusted by companies like Vapi, Motion, Plain, and Electric for syncing data across dozens of integrations. Differentiates from point-and-click integration tools by being code-first: developers write sync logic as functions, version it with git, and test locally before deploying. Open-source with a hosted option, processing billions of API requests with enterprise-grade reliability.

Key capabilities:

• Pre-built OAuth and credential management for 700+ APIs
• Two-way syncs, webhooks, and actions with full API access
• Local development with CLI, dry-run testing, and git-tracked integration code
• LLM tool calling and MCP server for AI agent integration
• OpenTelemetry for observability, tenant isolation, and elastic scaling

Developers use it to add product integrations without hand-rolling OAuth flows or managing sync infrastructure. Common scenarios include syncing CRM data, calendar events, or project management tools into internal databases; building unified APIs across multiple SaaS products; and exposing integrations to AI agents via MCP or tool-calling. Keeps integration logic in code, deployable alongside the rest of the application.