# Free Muse Spark API Endpoints & Rate Limits

> 1 provider · 1 free model · Last updated: 01 Nov 2026

## Quick Answer

1 free Muse Spark API models across 1 provider including OpenRouter. Verified rate limits, context windows, and OpenAI-compatible endpoints. Last updated: 01 Nov 2026.

Free Muse Spark API inference (Meta Muse Spark 1.3 Contributor Free with 1M context) is available on OpenRouter and OpenCode Zen with standard OpenAI-compatible base URLs.

## Quick Connect

Muse Spark 1.3 Contributor Free with 1M context window.

- **Base URL:** `https://openrouter.ai/api/v1`
- **Model:** `meta/muse-spark-1.3-contributor:free`
- **Provider:** [OpenRouter](/providers/openrouter/)

```python
from openai import OpenAI

client = OpenAI(
    base_url="https://openrouter.ai/api/v1",
    api_key="your-api-key",  # from OpenRouter
)

response = client.chat.completions.create(
    model="meta/muse-spark-1.3-contributor:free",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(response.choices[0].message.content)
```

## Rate Limits & Model Inventory

| Model | Provider | Cost | Context | RPM | TPM | RPD | Day tokens | Verified |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| meta/muse-spark-1.3-contributor:free | [OpenRouter](/providers/openrouter/) | $0 | 1000000 | 20 | Provider-dependent | 50 (below $10 credits) / 1,000 ($10+ credits) | Not published | 2026-11-01 |

Web page: https://freeinference.dev/free-muse-spark-api/
Machine-readable JSON: /data/providers.json
Agent summary: /llms.txt

Numbers cross-checked against official docs and live probes as of 2026-11-01. Limits change without notice — this is a map, not a contract.