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Configuration and Environment

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Exporter options

You can provide either a custom exporter implementation or HTTP exporter options. For most teams, the simplest setup is an ingest URL plus an API key in the environment so the runtime can stay portable across local, staging, and prod. 
exporter: {
  url: process.env.CAPTAR_INGEST_URL!,
  apiKey: process.env.CAPTAR_INGEST_API_KEY,
}

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Policy shape

defaultPolicy: {
  budget: {
    maxSpendUsd: 2,
    finalizationReserveUsd: 0.2,
  },
  call: {
    allowedModels: ["gpt-4.1-mini"],
    maxEstimatedCostUsd: 0.5,
  },
  tool: {
    blockedTools: ["billing.refundWithoutReview"],
  },
}

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Environment variables

Keep the environment surface small and easy to audit. If a variable controls privacy, spend, or export, document it right next to the startup code. 
OPENAI_API_KEY=...
CAPTAR_INGEST_URL=http://localhost:3000/api/ingest
CAPTAR_INGEST_API_KEY=