Hi, thanks for trying out HSDS lambda functions!
For the lambda event, you'll need to provide a JSON that will tell the code how to fetch the data. The structure is basically what's documented here: https://github.com/HDFGroup/hdf-rest-api wrapped up in a json with keys: "method", "path", and "params". (the example in the docs are using an out-dated format that had "request" instead of "path"). method will be: "GET", "POST", "PUT", or "DELETE". (the standard http actions) path: is just the http path (i.e. the part after the service endpoint) params: are the query parameters for the request Also you can have a "body" key (for POST requests), and a "headers" key for any http headers (typically you don't need this). In the AWS Management Console for Lambda, it's convenient to setup some test events like this one: { "method": "GET", "path": "/datasets/d-d29fda32-85f3-11e7-bf89-0242ac110008/value", "params": { "domain": "/nrel/wtk-us.h5", "select": "[:5000,620,1401]", "bucket": "nrel-pds-hsds" } } With these you should get an output equivalent to the following h5pyd code: f = h5pyd.File("/nrel/wtk-us.h5", bucket="nrel-pds-hsds") dset = f["windspeed_80m"] data = dset[0:100,620,1401] print(data) Let me know if that works for you. In your example, I'm guessing that lambda code isn't able to find any relevant data. It should return a 404 (not found) or 403 (unauthorized), but instead is just returning the /about response. I'll look into this. --- [Visit Topic](https://forum.hdfgroup.org/t/how-to-issue-requests-to-hsds-lambda/10136/2) or reply to this email to respond. You are receiving this because you enabled mailing list mode. To unsubscribe from these emails, [click here](https://forum.hdfgroup.org/email/unsubscribe/dd194c36a6dfcf257ddc2da3d52c80ec888ac7f6925da1e37512fc27941dada5).
