Preparation
Create an API key
Open the developer menu in the dashboard and navigate to API Keys. Now click on Add new API keys.
Important: Save the secret key and never pass it on to third parties!
Make an API Request
Now use the endpoint /orders/link/carbon to create a checkout link with a fixed amount of CO2 emissions or use the endpoint /orders/link/price to create a checkout link with a fixed amount in the desired currency.
Good to know: You can also use our PHP Library or Node.js Library to interact with the API.
Options
Currency
Use the header parameter X-CURRENCY to select the currency in which the result of the API and the checkout link should be returned. There are over 100 currencies to choose from.
Language
Use the X-LOCALE header parameter to select the language in which the result of the API and the checkout link should be returned.
Success & Cancel URLs
Use the success_url & cancel_url parameters to select where the user of the checkout link should be redirected after a successful and canceled payment.
Order Count
Adjust the order_count parameter to get up to 3 checkout links with one API call.
Example
In this example, we calculate the emissions of a trip from Berlin to Munich and use the result to create a checkout link.
Checkout link with 500kg CO2e
POST/v2/orders/link/carbon
1 2 3 4 5{ "kgCO2e": 500, "success_url": "https://your-business.com/success", "cancel_url": "https://your-business.com/cancel" }
Response
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31{ "payment_link": "https://klimapi.com/checkout/1c137daf-d3d7-42ad-8d7c-6429e8840957", "payment_link_id": "00000000-0000-0000-0000-000000000000", "certificate_url": null, "certificate_pdf": null, "order_id": "CA-0000-00000000", "price": 11.3, "currency": "EUR", "kgCO2e": 500, "payment_received": false, "project": { "id": "00000000-0000-0000-0000-000000000000", "title": "Example Project", "summary": "Example Summary", "status": "Active", "category_id": 3, "certification_authority_id": 2, "country": "Example Country", "description": null, "goals": null, "images": [ "https://cdn.klimapi.com/projects/00000000-0000-0000-0000-000000000000_1.jpeg", "https://cdn.klimapi.com/projects/00000000-0000-0000-0000-000000000000_2.jpeg" ], "benefits": [ 7, 8, 13 ] } }
Checkout link for 10 Euro
POST/v2/orders/link/price
1 2 3 4 5 6{ "price_amount": 10, "change_allowed": true, "success_url": "https://your-business.com/success", "cancel_url": "https://your-business.com/cancel" }
Response
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31{ "payment_link": "https://klimapi.com/checkout/1c137daf-d3d7-42ad-8d7c-6429e8840957", "payment_link_id": "00000000-0000-0000-0000-000000000000", "certificate_url": null, "certificate_pdf": null, "order_id": "CA-0000-00000000", "price": 10, "currency": "EUR", "kgCO2e": 448, "payment_received": false, "project": { "id": "00000000-0000-0000-0000-000000000000", "title": "Example Project", "summary": "Example Summary", "status": "Active", "category_id": 3, "certification_authority_id": 2, "country": "Example Country", "description": null, "goals": null, "images": [ "https://cdn.klimapi.com/projects/00000000-0000-0000-0000-000000000000_1.jpeg", "https://cdn.klimapi.com/projects/00000000-0000-0000-0000-000000000000_2.jpeg" ], "benefits": [ 7, 8, 13 ] } }