docs(readme): add NIM Try via API (Magpie TTS Multilingual)

README.md

@@ -286,6 +286,80 @@ When `--run_evaluation` is enabled, the following metrics are computed:
 | **RTF** | Real-time factor (processing time / audio duration) |
 
 
+## Try via API — No Setup Required
+
+Synthesize speech using the hosted NVIDIA NIM API on [Magpie TTS Multilingual](https://build.nvidia.com/nvidia/magpie-tts-multilingual) — no local GPU, Docker, or checkpoint download required.
+
+**1. Get a free API key:** Open [Magpie TTS Multilingual](https://build.nvidia.com/nvidia/magpie-tts-multilingual) and choose **Get API Key**.
+
+**2. Install the Riva client:**
+
+```bash
+pip install nvidia-riva-client
+```
+
+**3. Synthesize speech to a WAV file:**
+
+```python
+import wave
+
+import riva.client
+from riva.client.proto.riva_audio_pb2 import AudioEncoding
+
+auth = riva.client.Auth(
+    uri="grpc.nvcf.nvidia.com:443",
+    use_ssl=True,
+    metadata_args=[
+        ["function-id", "877104f7-e885-42b9-8de8-f6e4c6303969"],
+        ["authorization", "Bearer nvapi-YOUR_API_KEY"],
+    ],
+)
+
+service = riva.client.SpeechSynthesisService(auth)
+
+sample_rate_hz = 22050
+resp = service.synthesize(
+    "Hello from the Magpie multilingual hosted API.",
+    "Magpie-Multilingual.EN-US.Sofia",
+    "en-US",
+    sample_rate_hz=sample_rate_hz,
+    encoding=AudioEncoding.LINEAR_PCM,
+)
+
+with wave.open("out.wav", "wb") as wf:
+    wf.setnchannels(1)
+    wf.setsampwidth(2)
+    wf.setframerate(sample_rate_hz)
+    wf.writeframesraw(resp.audio)
+```
+
+**Or use the CLI (list voices, then synthesize):**
+
+```bash
+git clone https://github.com/nvidia-riva/python-clients.git
+export NVIDIA_API_KEY="nvapi-YOUR_API_KEY"
+
+python python-clients/scripts/tts/talk.py \
+    --server grpc.nvcf.nvidia.com:443 --use-ssl \
+    --metadata function-id "877104f7-e885-42b9-8de8-f6e4c6303969" \
+    --metadata authorization "Bearer $NVIDIA_API_KEY" \
+    --list-voices
+
+python python-clients/scripts/tts/talk.py \
+    --server grpc.nvcf.nvidia.com:443 --use-ssl \
+    --metadata function-id "877104f7-e885-42b9-8de8-f6e4c6303969" \
+    --metadata authorization "Bearer $NVIDIA_API_KEY" \
+    --text "Hello from Magpie." \
+    --voice "Magpie-Multilingual.EN-US.Sofia" \
+    --language-code en-US \
+    --sample-rate-hz 22050 \
+    -o out.wav
+```
+
+> **Note:** Voice IDs and supported sample rates follow the deployed NIM. Use `--list-voices` against this endpoint, or see the **API Reference** on the [Magpie TTS Multilingual](https://build.nvidia.com/nvidia/magpie-tts-multilingual) page.
+
+
+
 ## Software Integration:
 **Runtime Engine(s):** NeMo Framework 25.11