Wren | API

Wren API

With the Wren API, you can build tools, plugins, and apps on-top of Wren's portfolio of vetted carbon offset projects.

Offset carbon with a single line of code

$ curl https://www.wren.co/api/offset-orders \
  -u [api_token]: -d tons=0.5

$ curl https://www.wren.co/api/project-orders \
  -u [api_token]: -d projectId=123 -d amountInUsdCents=2500

Step 1

Create an account

We associate offset impact to this Wren account

Step 2

Add a payment method

In order to use the API, we will need to add a credit card to pay for offsets you place through it. We do not charge per request, only when you offset CO2.

Step 3

Start using the API

Dynamically offset any amount of carbon using our portfolio of projects

See our API documentation

Explore a few of the projects we fund

Carbon Removal Alliance

This project advances policies that support a diverse set of permanent, high-quality carbon removal technologies.

Tech-enabled rainforest protection

Help indigenous communities protect their Amazon rainforest home by funding satellite imagery, drones and monitoring tools.

Clean cookstoves in East Africa

This project reduces greenhouse gas emissions by transitioning households and businesses in East Africa from charcoal to clean alternatives, decreasing the reliance on non-renewable fuels.

Underground biomass storage

This project dries and compresses biomass into dense blocks of carbon and stores them underground.

Enhanced weathering on rice paddies

This project spreads crushed rock on rice paddies in India, permanently removing CO₂ from the atmosphere and supporting smallholder farmers.

Enhanced rock weathering

This project spreads crushed silicate rocks such as basalt on agricultural land, speeding up the Earth’s natural weathering cycle, and permanently removing carbon from the atmosphere.

Carbon Gap

This project advances policies that maximize Europe’s contribution to the rapid and responsible global scale-up of carbon dioxide removal (CDR) needed for effective climate change mitigation.

Adipic acid nitrous oxide abatement

Help prevent highly-poluting nitrous oxide emissions from plastic production.

Improved forest management in Maine

This project removes carbon dioxide from the atmosphere by partnering with private forest owners to help them keep their forests growing for longer.

Landfill methane abatement

This project avoids the emission of methane (CH₄), a greenhouse gas 28× more potent than carbon dioxide (CO₂).

Biochar carbon removal

Help prevent California wildfires, while locking up carbon for thousands of years.

Forest resilience against wildfires

This project restores and protects forests, watersheds, ecosystems, and communities in the Western United States.

Mangrove planting in Myanmar

This project reforests degraded mangrove ecosystems in Myanmar’s Ayeyarwady Division.

Refrigerant destruction

Help find and destroy dangerous CFC-12 refrigerants before they leak into the atmosphere.

Wren Climate, PBC

Take real, effective climate action with Wren’s all-in-one climate platform.