---
title: "Current-month cost rollup"
method: GET
path: "/api/usage"
tags: ["Usage"]
---

# Current-month cost rollup

`GET /api/usage`

## Request

- Base URL: `https://api.setluca.com`
- URL: `https://api.setluca.com/api/usage`
- Auth: one of:
  - API key in cookie `luca.session_token`
  - API key in header `x-api-key`
  - HTTP bearer

Month-to-date model spend against the tier's budget, with the dollars remaining and an `overCap` flag. Pass `since` to roll up from a different start date.

**API key scopes:** `usage:read`.

## Query parameters

- `since` string

## Headers

- `Luca-API-Version` '1'

## Response `200`

ok

- UsageResponse
  - `since` string, required
  - `totalUsd` number, required
  - `totalCalls` number, required
  - `byAgent` object[], required
    - `agent` string, required
    - `totalUsd` number, required
    - `calls` number, required
  - `byDay` object[], required
    - `day` string, required
    - `totalUsd` number, required
  - `cap` object, required
    - `planTier` string, required
    - `capUsd` number, required
    - `totalUsd` number, required
    - `remainingUsd` number, required
    - `overCap` boolean, required
  - `aiAddonUnits` integer

## Other responses

- `400`: bad request
- `401`: unauthorized
- `429`: rate limited
- `500`: internal error
- `503`: service unavailable

---

[API](https://skmtc.dev/setluca/apis/luca-api.md) · [All operations](https://skmtc.dev/setluca/apis/luca-api/llms.txt) · [OpenAPI document](https://skmtc.dev/setluca/apis/luca-api/revisions/90a200e4100b?raw)