Cursor usage always reports 0 — provider reads deprecated `numRequests` from /api/usage

[leek]

Summary

The Cursor menu bar entry always shows 0 usage, even for accounts with heavy activity. The root cause is that CursorUsageProvider reads the deprecated numRequests field from https://www.cursor.com/api/usage, which Cursor froze at 0 when it moved to credit/usage-based pricing in mid-2025.

Evidence

CursorUsageProvider.fetchUsageFromAPI() authenticates correctly (JWT is read from state.vscdb, the API returns HTTP 200), but the response body for a current-pricing account is:

{
  "gpt-4": { "numRequests": 0, "numRequestsTotal": 0, "numTokens": 0,
             "maxTokenUsage": null, "maxRequestUsage": null },
  "startOfMonth": "<redacted>"
}

CursorUsageProvider.swift:116 sums numRequests across the model buckets → 0. The account in question had hundreds of dollars of real model usage in the same billing period, so this is not a "no usage" case — the field itself is dead under the new pricing model.

This is consistent with the in-app note in SettingsView.swift:292: "Credit-based pricing since June 2025." The provider was never updated to match.

Where the real usage lives

Cursor's dashboard now reports usage from:

POST https://cursor.com/api/dashboard/get-aggregated-usage-events
Headers: Cookie: WorkosCursorSessionToken=<userId>::<jwt>
         Origin: https://cursor.com          # required — CSRF guard, 403 without it
         Content-Type: application/json
Body:    { "teamId": -1, "startDate": "<ms epoch>", "endDate": "<ms epoch>" }

Response (HTTP 200) includes per-model token breakdown plus authoritative totals:

{
  "aggregations": [ { "modelIntent": "...", "inputTokens": "...",
                      "outputTokens": "...", "totalCents": 12345.6, "tier": 1 }, ... ],
  "totalInputTokens": "...", "totalOutputTokens": "...",
  "totalCostCents": 53285.77
}

totalCostCents / 100 is the dollar spend the Cursor dashboard shows for the period.

Proposed fix

Switch the Cursor provider to report dollars spent this billing period (totalCostCents) against a per-plan USD allotment, using the .dollars unit that UsageData/UsageUnit and the UI (DetailPopoverView, UsageHistoryTabView) already support. The existing /api/usage call can be kept solely for startOfMonth (billing anchor + reset time).

I have a working patch + updated tests and will open a PR referencing this issue.

Environment

• AgentBar main
• macOS, Cursor desktop with local state.vscdb present and a valid session token
• Account on Cursor's current credit-based pricing (Ultra), API reachable and returning 200