Microsoft Office

​

Word and Excel — GPT for Work add-ins

• Bulk models (Excel and Word) — the Chat Completions path, used by bulk prompting and the spreadsheet functions. Add an OpenAI-compatible endpoint (Chat Completions API) with:
  • Endpoint URL: https://api.aireserve.com — host root, no /v1 (unlike most tools in these guides: GPT for Work appends the /v1/models and /v1/chat/completions resource paths itself, so a /v1 suffix here would double up).
  • API key: your aireserve_api_… key.
  • Display name (optional): e.g. AI Reserve — prefixed to model names in the model switcher (custom/ by default).
  Click Check — the add-in validates the connection — then Save. The switcher then lists the gateway’s full catalog under Connected models (/v1/models is the discovery call — it excludes client-exclusive models but does include consent-gated ones, so a model your org hasn’t opted into will list here and refuse at call time with the reason).
• Agent models (Excel only) — the agent sidebar, which drives the workbook. Add an OpenAI-compatible endpoint (Responses API) with the same Endpoint URL and key, plus a Model ID per entry (say gpt-5.5 or claude-sonnet-4-6). GPT for Work requires the endpoint to serve /v1/responses over public HTTPS and the model to have at least a 32K-token context — the gateway serves the Responses format for every model, and the flagship models all clear the context bar.

​

Excel — Office Scripts

interface ChatCompletion {
  choices: { message: { content: string } }[];
}

async function main(workbook: ExcelScript.Workbook) {
  const sheet = workbook.getActiveWorksheet();
  const prompt = String(sheet.getRange("A1").getValue());

  const response = await fetch("https://api.aireserve.com/v1/chat/completions", {
    method: "POST",
    headers: {
      "Content-Type": "application/json",
      Authorization: "Bearer aireserve_api_...", // your key
    },
    body: JSON.stringify({
      model: "gpt-5.4-mini",
      messages: [{ role: "user", content: prompt }],
    }),
  });

  if (!response.ok) {
    // 401/403/429/402 return an OpenAI error body — surface it instead of
    // failing later on a missing field.
    throw new Error(`Gateway error ${response.status}: ${await response.text()}`);
  }

  const completion: ChatCompletion = (await response.json()) as ChatCompletion;
  sheet.getRange("B1").setValue(completion.choices[0].message.content);
}

​

Power Automate

​

Microsoft Copilot — the boundary