Attempting to send back in stock subscription over legacy API keeps failing...

Question

I am attempting to send a back in stock subscription using the legacy API endpoint. I’m using the node fetch API and sending a POST request with the following code;

const formData = new URLSearchParams();
    formData.append('a', KLAVIYO_PUBLIC_API_KEY);
    formData.append('email', email);
    formData.append('variant', variantId);
    formData.append('platform', 'api');

const klaviyoRes = await fetch(`${KLAVIYO_BIS_API_URL}/subscribe`, {
      method: 'POST',
      headers: {
        'content-type': 'application/x-www-form-urlencoded',
      },
      body: formData,
    });

I keep getting a response back that this endpoint does not accept a GET request from Klaviyo. Anyone have a node implementation that works here or uses one of their SDK’s for this?

Brian Turcotte · Accepted Answer

Hi @mrispoli!My apologies for the delay - would you be willing to provide the exact response you are receiving (with any sensitive information redacted)?This would help myself/Engineering understand the issue a little better.In the meantime, I would say thatback in stockcalls must be made in accordance with this guide:https://developers.klaviyo.com/en/docs/how_to_set_up_custom_back_in_stockTo that end, I would recommend reading through that guide and double-checking that your API calls are structured thusly.Best,Brian

Brian Turcotte · Answer

Hi@mrispoli,I am going to check with Engineering on this one, and I will update the thread as soon as possible!Best,Brian

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