Fireworks provider

Fireworks is API-only for billing: there is no public credit-balance endpoint, so CodexBar shows the last 30 days of rated spend from the account billing summary API instead of a balance gauge.

Data sources

1. API key stored in ~/.codexbar/config.json or supplied via FIREWORKS_API_KEY (legacy alias: FIREWORKS_KEY).
2. Optional account slug stored in ~/.codexbar/config.json or supplied via FIREWORKS_ACCOUNT_SLUG.

CodexBar calls GET https://api.fireworks.ai/v1/accounts to list the accounts visible to the key. A single account is selected automatically and its slug is saved to the config. When several accounts are visible, the user must choose one in the app.fireworks.ai home account switcher or obtain it from firectl whoami, then enter it in Settings. A configured slug remains useful for selecting among multiple accounts.

Spend endpoint

• GET https://api.fireworks.ai/v1/accounts/{account_slug}/billing/summary?startTime=...&endTime=...
• Request headers: Authorization: Bearer <api key>, Accept: application/json
• The 30-day window is sent explicitly (startTime/endTime as ISO 8601); granularity is not requested.
• Response contains lineItems with rated totalCost entries (currencyCode, units, nanos).
• CodexBar sums units + nanos / 1e9 across line items, using the first rated currency as the display currency and skipping rows in other currencies.

Usage details

• The menu card shows the 30-day spend, e.g. $0.53 under a "Spend" label.
• There is no session or weekly window — Fireworks does not expose per-window quota via API.
• HTTP 401/403 surfaces an invalid-key message, 429 a rate-limit message.
• A 404 for a configured slug retries account discovery. An empty billing response is accepted only when the slug is present in the account listing, so a guessed or stale slug cannot look like a successful refresh.
• There is no balance display; the Fireworks web console (app.fireworks.ai → Settings/Billing) is the authoritative balance source.

Plugin conversion status

The native fetcher remains authoritative. A valid response with no rated line items for a listed account intentionally produces a successful snapshot with no rate window, cost, or detail; the current plugin snapshot contract rejects that shape.

Key files

• Sources/CodexBarCore/Providers/Fireworks/FireworksProviderDescriptor.swift (descriptor + fetch strategy)
• Sources/CodexBarCore/Providers/Fireworks/FireworksUsageFetcher.swift (HTTP client + JSON parser)
• Sources/CodexBarCore/Providers/Fireworks/FireworksSettingsReader.swift (env var resolution)
• Sources/CodexBar/Providers/Fireworks/FireworksProviderImplementation.swift (settings fields)
• Sources/CodexBar/Providers/Fireworks/FireworksSettingsStore.swift (SettingsStore extension)