# API Reference {#api-reference}


The complete, always-current Nitrosend REST API reference is generated from our OpenAPI 3.1 spec. Browse every endpoint, parameter, and response schema, with copy-paste examples in curl, JavaScript, and Python.







**[Open the full API Reference](https://docs.nitrosend.com/api.md)**

Every endpoint, request and response schema, and ready-to-run code samples.






## Quick facts {#quick-facts}


- **Base URL**: `https://api.nitrosend.com/v1/my`
- **Auth**: `Authorization: Bearer nskey_live_...` — grab a key in **Settings > API Keys** at [app.nitrosend.com/my/settings/api-keys](https://app.nitrosend.com/my/settings/api-keys)
- **OpenAPI spec**: [`https://api.nitrosend.com/openapi.yaml`](https://api.nitrosend.com/openapi.yaml) — import it into Postman, an SDK generator, or your agent's tool schema



> [!IMPORTANT]
> Every plan, including free plans, has full API access. Plan limits apply to send volume, seats, and AI action allowances — not to the API itself.



Prefer a guided walkthrough with language examples? See the [REST API guide](https://docs.nitrosend.com/integrations/rest-api.md). Operating from a terminal or CI? See the [CLI overview](https://docs.nitrosend.com/cli/overview.md).