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GET
/
api
/
v1
/
custom_emission_groups
/
units
/
{id}
Get Group Units
const options = {
  method: 'GET',
  headers: {
    'x-api-key': '<x-api-key>',
    'x-organization-id': '<x-organization-id>',
    'x-user-id': '<x-user-id>'
  }
};

fetch('https://api.dcycle.io/api/v1/custom_emission_groups/units/{id}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));
{
  "id": "<string>",
  "name": "<string>",
  "abbreviation": "<string>",
  "type": "<string>"
}

​
Get Group Units

Retrieve a list of all measurement units used by emission factors within a specific custom emission group.
This endpoint returns the unique set of units used across all emission factors in the group, useful for validating data consistency or building UI selectors.

​
Request

​
Headers

​
x-api-key
string
required
Your API key for authenticationExample: sk_live_1234567890abcdef
​
x-organization-id
string
required
Your organization UUIDExample: ff4adcc7-8172-45fe-9cf1-e90a6de53aa9
​
x-user-id
string
required
Your user UUIDExample: a1b2c3d4-e5f6-7890-abcd-ef1234567890

​
Path Parameters

​
id
string
required
UUID of the Custom Emission Group

​
Response

Returns an array of unit objects used in the group. 
[
  {
    "id": "kg-unit-uuid",
    "name": "kilogram",
    "abbreviation": "kg",
    "type": "mass"
  },
  {
    "id": "ton-unit-uuid",
    "name": "metric ton",
    "abbreviation": "t",
    "type": "mass"
  }
]

​
Example

curl "https://api.dcycle.io/api/v1/custom_emission_groups/units/group-uuid" \
  -H "Authorization: Bearer ${DCYCLE_API_KEY}" \
  -H "x-organization-id: ${DCYCLE_ORG_ID}" \
  -H "x-user-id: ${DCYCLE_USER_ID}"

​
Use Cases

​
Build Unit Selector

Create a dropdown with available units for the group: 
async function loadUnitsForGroup(groupId) {
  const units = await axios.get(
    `https://api.dcycle.io/api/v1/custom_emission_groups/units/${groupId}`,
    { headers }
  ).then(res => res.data);

  const options = units.map(unit => ({
    value: unit.id,
    label: `${unit.name} (${unit.abbreviation})`
  }));

  return options;
}

​
Validate Data Consistency

Check if all factors in a group use the same unit type: 
units = requests.get(
    f"https://api.dcycle.io/api/v1/custom_emission_groups/units/{group_id}",
    headers=headers
).json()

unit_types = set(unit['type'] for unit in units)

if len(unit_types) == 1:
    print(f"✅ Consistent unit type: {unit_types.pop()}")
else:
    print(f"⚠️ Mixed unit types: {', '.join(unit_types)}")
    print("Consider reviewing factor consistency")

​
Display Group Statistics

Show unit usage statistics: 
units = requests.get(
    f"https://api.dcycle.io/api/v1/custom_emission_groups/units/{group_id}",
    headers=headers
).json()

# Get all factors
factors = requests.get(
    f"https://api.dcycle.io/api/v1/custom_emission_factors/list/{group_id}",
    headers=headers,
    params={"page": 1, "size": 100}
).json()

print(f"Group uses {len(units)} different units across {factors['total']} factors:\n")

for unit in units:
    count = sum(1 for f in factors['items'] if f['unit_id'] == unit['id'])
    print(f"- {unit['abbreviation']}: {count} factors")

​
Response Fields

​
id
string
Unique identifier for the unit
​
name
string
Full name of the unit (e.g., “kilogram”, “liter”)
​
abbreviation
string
Standard abbreviation (e.g., “kg”, “L”)
​
type
string
Unit type (e.g., “mass”, “volume”, “energy”, “currency”)

​
Common Errors

​
404 Not Found

{
  "detail": "Custom emission group not found",
  "code": "NOT_FOUND"
}
Solution: Verify the group ID exists.

​
Empty Array

If the group has no emission factors yet, this endpoint returns an empty array [].

List Factors

View all factors in group

Get Group

View group details

All Units

List all available units