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

# Get SIMS Species Profile

> Retrieve a single SIMS depth profile by species

Returns the SIMS depth profile for a single chemical species within a data entry. Returns `null` if no profile exists for the requested species.

<ParamField path="data_id" type="string" required>
  The data entry UUID for the SIMS measurement
</ParamField>

<ParamField path="species_name" type="string" required>
  The chemical species to retrieve (e.g., `Si`)
</ParamField>

## Response

Returns a single depth profile object with the same shape as an item in the [Get SIMS Data](/api-reference/sims/get) response, or `null` if the species is not present.

<RequestExample>
  ```python Python theme={null}
  import requests

  response = requests.get(
      "https://api.atomscale.ai/sims/d290f1ee-6c54-4b01-90e6-d701748f0851/species/Si",
      headers={"X-API-KEY": "YOUR_API_KEY"}
  )
  profile = response.json()
  ```

  ```bash cURL theme={null}
  curl "https://api.atomscale.ai/sims/d290f1ee-6c54-4b01-90e6-d701748f0851/species/Si" \
    -H "X-API-KEY: YOUR_API_KEY"
  ```
</RequestExample>

<ResponseExample>
  ```json 200 theme={null}
  {
    "data_id": "d290f1ee-6c54-4b01-90e6-d701748f0851",
    "id": "sims_001",
    "processed_data_id": "f47ac10b-58cc-4372-a567-0e02b2c3d479",
    "species_name": "Si",
    "depths": [0, 10, 20, 30, 40],
    "depth_units": "nm",
    "concentrations": [1.2e18, 3.4e18, 5.1e18, 2.0e18, 8.0e17],
    "concentration_units": "atoms/cm^3",
    "species_metadata": {},
    "last_updated": "2024-01-15T10:35:00Z"
  }
  ```
</ResponseExample>