---
title: "Collective adoption goal: donations with the Charitips API"
description: "A SaaS ties a donation to a feature's adoption: once 500 users have turned it on, it gives 0,50 € per user. Each user picks their own charity."
canonical: https://www.charitips.com/docs/use-cases/vote-on-a-budget/adoption-goal
---

# Collective adoption goal: donations with the Charitips API

> A SaaS ties a donation to a feature's adoption: once 500 users have turned it on, it gives 0,50 € per user. Each user picks their own charity.

- **Use case**: [Customers vote on a budget](https://www.charitips.com/docs/use-cases/vote-on-a-budget.md)
- **Sector**: Software and apps
- **Who pays**: Your company
- **What starts the donation**: A customer action
- **Example**: 0,50 € per user, paid once the goal is reached
- **Calls**: [`POST /v1/charities-selections`](https://www.charitips.com/docs/api-reference/create-charities-selection.md), [`POST /v1/campaigns`](https://www.charitips.com/docs/api-reference/create-campaign.md), [`POST /v1/campaigns/{campaignId}/activate`](https://www.charitips.com/docs/api-reference/activate-campaign.md), [`POST /v1/donations`](https://www.charitips.com/docs/api-reference/create-donation.md), [`POST /v1/donations/{donationId}/claim`](https://www.charitips.com/docs/api-reference/claim-donation.md)
- **Webhooks**: `donation_create`, `donation_update`

Interactive demo on the page. The same flow as a build spec: https://www.charitips.com/docs/demos/vote/adoption-goal.md

## How it works

The screens of the demo in order, with the calls your server makes at each one.

### Once, before the first customer

- [`POST /v1/charities-selections`](https://www.charitips.com/docs/api-reference/create-charities-selection.md) Create a charities selection: once: the charities you offer, from the catalog

  ```json
  {
    "name": "Booster for Good",
    "charityIds": [
      "<charityId>"
    ]
  }
  ```
- [`POST /v1/campaigns`](https://www.charitips.com/docs/api-reference/create-campaign.md) Create a campaign: once: the campaign the donations go to

  ```json
  {
    "name": "Booster for Good",
    "charitiesSelectionId": "<charitiesSelectionId>",
    "type": "PERMANENT",
    "amountType": "FREE_AMOUNT"
  }
  ```
- [`POST /v1/campaigns/{campaignId}/activate`](https://www.charitips.com/docs/api-reference/activate-campaign.md) Activate a campaign: once: the campaign starts taking donations

### 1. On activation

- Button: Turn on the feature

No call: this screen only shows the result.

### 2. At 1 000 activations

- Button: Reach 1 000 activations

**Your server calls:**

- [`POST /v1/donations`](https://www.charitips.com/docs/api-reference/create-donation.md) Create a donation: from your server, when it happens; amount in cents

  ```json
  {
    "campaignId": "<campaignId>",
    "amount": 50,
    "uniqueExternalId": "shared_reports_user_5521",
    "externalId": "user_5521"
  }
  ```

Charitips then sends the `donation_create` webhook to your endpoint.

### 3. When the charity is chosen

- The customer picks a charity from your selection.
- Button: Choose the charity

**Your server calls:**

- [`POST /v1/donations/{donationId}/claim`](https://www.charitips.com/docs/api-reference/claim-donation.md) Claim a donation: donationId from the create-donation response

  ```json
  {
    "charityId": "<charityId>"
  }
  ```

Charitips then sends the `donation_update` webhook to your endpoint.

## Other ways to run it

- [Customers vote on a budget](https://www.charitips.com/docs/use-cases/vote-on-a-budget/budget-vote.md) (Retail): A yearly budget split by the votes
- [Visitors vote at an exhibition](https://www.charitips.com/docs/use-cases/vote-on-a-budget/exhibition-ballot.md) (Culture and events): 1 € per ticket, split by the votes
- [The tournament winner picks](https://www.charitips.com/docs/use-cases/vote-on-a-budget/tournament-winner.md) (Software and apps): 2 € per entry, the winner picks the charity
- [Poll after a webinar](https://www.charitips.com/docs/use-cases/vote-on-a-budget/webinar-poll.md) (Education): 5 % of each ticket, the attendees choose
- [Full guide: edge cases, webhooks, receipts](https://www.charitips.com/docs/use-cases/vote-on-a-budget.md)
- [All use cases](https://www.charitips.com/docs/use-cases.md)