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Assigns features to a pricing plan. You can add a single feature or multiple features in a batch request. Features that are already assigned to the plan are silently skipped.

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Endpoint

POST /api/v1/projects/{slug}/plans/{planId}/features

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Authentication

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Authorization
string
required
Bearer token with your API key. Requires read_write permission.

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Path Parameters

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slug
string
required
The project’s URL-friendly slug identifier.
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planId
number
required
The plan’s unique ID.

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Body Parameters

You can use either the single-feature format or the batch format.

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Single Feature

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featureId
number
required
The ID of the feature to assign to the plan.
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multiplier
number
Multiplier for the feature (e.g. 3 means 3x the base limit). Defaults to 1.

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Batch (Multiple Features)

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features
array
Array of feature assignments to add in a single request.

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Response

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added
number
Number of features newly assigned to the plan.
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skipped
number
Number of features skipped because they were already assigned.
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features
array
Updated list of all plan-feature associations with full feature details.

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Example — Single Feature

curl -X POST https://cuprice.io/api/v1/projects/my-saas-app/plans/201/features \
  -H "Authorization: Bearer cpk_your_key_here" \
  -H "Content-Type: application/json" \
  -d '{
    "featureId": 103,
    "multiplier": 2
  }'

{
  "added": 1,
  "skipped": 0,
  "features": [
    {
      "id": 301,
      "multiplier": 5,
      "feature": {
        "id": 101,
        "name": "AI Prompts",
        "featureType": "Limits",
        "basePrice": 10
      }
    },
    {
      "id": 302,
      "multiplier": 1,
      "feature": {
        "id": 102,
        "name": "Team Members",
        "featureType": "Standart",
        "basePrice": 5
      }
    },
    {
      "id": 310,
      "multiplier": 2,
      "feature": {
        "id": 103,
        "name": "API Calls",
        "featureType": "Usage Based",
        "basePrice": 15
      }
    }
  ]
}

​
Example — Batch Add

curl -X POST https://cuprice.io/api/v1/projects/my-saas-app/plans/200/features \
  -H "Authorization: Bearer cpk_your_key_here" \
  -H "Content-Type: application/json" \
  -d '{
    "features": [
      { "featureId": 101, "multiplier": 1 },
      { "featureId": 102, "multiplier": 3 },
      { "featureId": 104, "multiplier": 1 }
    ]
  }'

{
  "added": 2,
  "skipped": 1,
  "features": [
    {
      "id": 300,
      "multiplier": 1,
      "feature": {
        "id": 101,
        "name": "AI Prompts",
        "featureType": "Limits",
        "basePrice": 10
      }
    },
    {
      "id": 311,
      "multiplier": 3,
      "feature": {
        "id": 102,
        "name": "Team Members",
        "featureType": "Standart",
        "basePrice": 5
      }
    },
    {
      "id": 312,
      "multiplier": 1,
      "feature": {
        "id": 104,
        "name": "Priority Support",
        "featureType": "Standart",
        "basePrice": 20
      }
    }
  ]
}
In the batch example, feature 101 was already assigned to the plan, so it was skipped (added: 2, skipped: 1).

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Errors

StatusDescription
400Missing featureId or invalid feature IDs
401Invalid or missing API key
403API key does not have read_write permission
404Project, plan, or feature not found