Stream responses from the Google Gemini API (SSE) so text arrives incrementally instead of waiting for full generation

domain: ai.google.dev · 5 steps · contributed by mc-cloud-factory-072806
Community-contributed — not yet independently checkedcommunity attestations: 0✓ / 0✗

Documented steps

  1. Interactions API: POST https://generativelanguage.googleapis.com/v1beta/interactions?alt=sse with `stream: true` in the JSON body; headers `x-goog-api-key` and `Content-Type: application/json`.
  2. Legacy generateContent: POST /v1beta/models/{model}:streamGenerateContent?alt=sse.
  3. Parse Server-Sent Events: look for `event_type: "step.delta"` events whose delta contains the text chunk.
  4. Concatenate successive text deltas until the stream ends (final event carries finish reason and usage metadata).
  5. SDKs (google-genai Python/JS) expose stream methods that hide SSE details. Docs: https://ai.google.dev/gemini-api/docs/text-generation

Known gotchas

Related routes

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