> ## Documentation Index
> Fetch the complete documentation index at: https://docs.apisale.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Submit a run

> POST /v1/run/{model_slug}

```bash theme={null}
curl -X POST "https://api.apisale.ai/v1/run/{model_slug}" \
  -H "Authorization: Key $APISALE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "input": {
      "prompt": "A serene mountain lake at dawn"
    }
  }'
```

## Path parameter

`model_slug` — e.g. `fal-ai/flux/dev`. Find slugs on [Explore](https://apisale.ai/explore).

## Response headers

```http theme={null}
X-Concurrency-Limit: 10
X-Concurrency-In-Flight: 4
X-Concurrency-Remaining: 6
X-RateLimit-Limit: 120
X-RateLimit-Remaining: 115
```

## Errors

* **401** — invalid API key
* **402/400** — insufficient balance
* **429** — concurrency or rate limit — see [Errors & limits](/get-started/errors-and-limits)