---
title: "Export daily aggregates as CSV or JSON"
method: GET
path: "/api/v1/usage/export"
tags: ["Usage"]
---

# Export daily aggregates as CSV or JSON

`GET /api/v1/usage/export`

Returns a downloadable file (CSV uses RFC-4180 quoting; JSON is a flat array — no envelope). The `format` query selects the content type. When `projectId` is set, every row carries that project's name in the `project_name` column.

## Query parameters

- `range` '7d' | '30d' | '90d' | '365d'
- `format` 'csv' | 'json'
- `projectId` string, uuid

## Response `200`

Exported file (CSV or JSON depending on `format` param)

- DailyUsageExportRow[]
  - `date` string, required
  - `project_name` string, required
  - `prompt_tokens` number, required
  - `completion_tokens` number, required
  - `total_tokens` number, required
  - `request_count` number, required
  - `cost_usd` number, required
  - `carbon_kg` number, required
  - `energy_kwh` number, required

## Other responses

- `400` — Bad request — validation failed or malformed JSON body
- `401` — Unauthorized — token missing, expired, or invalid
- `429` — Too many requests — rate limit exceeded
- `500` — Internal server error

---

[API](https://skmtc.net/crbonfree/apis/crbonfree-api.md) · [All operations](https://skmtc.net/crbonfree/apis/crbonfree-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/crbonfree/crbonfree-api/versions/29b71b1664e7/schema)