Nango

Nango is an open-source platform for building, running and maintaining API integrations in code, with managed auth, syncs, webhooks and MCP tools for products and AI agents across 1,000+ APIs.

Nango is an integration platform aimed at engineering teams that need their product or AI agents to talk to third-party APIs. Instead of hand-building OAuth flows, token refresh, polling jobs and retry logic for every service, teams use Nango as a shared runtime and write the integration logic itself as code. The catalog covers more than 1,000 APIs, with over 7,000 reusable templates that can be adopted as they are or modified. In practice the workflow has three stages. First, end users authorize an integration through a hosted flow, picking a service such as GitHub, HubSpot, Slack or Linear and approving the requested scopes. Second, integration functions are defined in TypeScript: syncs that pull data on a schedule (for example every five minutes), actions, webhooks and triggers. Nango can also generate this code from a plain-English description such as syncing contacts from Salesforce. Third, the finished integrations are exposed to the product or to agents through an API, an SDK, or MCP and tool interfaces, so an agent can call them as ready-made tools. The runtime side is where Nango positions itself against lighter wrappers. The homepage lists high-concurrency execution, tenant isolation, resumable runs, rate-limit handling, logs, metrics and alerts, plus role-based access control, per-user API scopes and an audit trail. Data is encrypted at rest and in transit. Per-customer customization is a stated use case, letting a team adapt an integration for one customer without a separate services project. The platform is fully open source and can be self-hosted, which separates it from closed unified-API vendors where the integration logic lives in a vendor dashboard. The tradeoff is that Nango expects developers to work in code, with local development, CI/CD and environments as part of the model. It suits SaaS companies shipping customer-facing integrations and teams building agents that need dependable access to many external systems. Customer quotes on the site come from companies including Replit, Vapi, Plain, Electric and Motion.