Receiving "SignatureDoesNotMatch" errors when using Spaces with Postman

September 24, 2017 4.4k views
API Object Storage

Very similar to the other 'SignatureDoesNotMatch' question but having issues with Postman,

So i'm trying to use postman to gain access to my files. I've set up the 'AccessKey' and 'SecretKey' pair within the API section in digital ocean but constantly getting '<Error>

anyone had any luck working through postman to access object spaces?

  • It's seams like DO spaces it's not very ready for production use. They say that supported only V2 signature version, but signing with V2 also does not work.

  • Hi there - I'm the product manager for Spaces. Thanks for letting us know that you ran into an issue.

    Would you be able to try again with a new access/secret key OR by regenerating an existing key?

    We in the last few days changed how key regeneration is done (we now regenerate the access key AND the secret) and using a new keypair (or regenerating an existing one again) is the likely fix for what you've reported.

    If for some reason that doesn't work, please let us know.

  • I've tried again with a new access/secret, but sadly still getting the same result. Has anyone managed to use 'put' with spaces via postman to create a new file?

  • Hello there,

    I'm getting the same error via Transmit 5.

    @johngannon any idea when this may be solved? thanks

  • @antoniorosado Transmit just released v.5.0.5 which has a fix/fixes that allow it to work well with Spaces. Hope this helps.

  • Hello same issue here:
    Trying to PUT a bucket but it returns this error.

    Can you see what is happening?

    "<?xml version="1.0" encoding="UTF-8"?><Error><Code>SignatureDoesNotMatch</Code><RequestId>tx0000000000000008c7c2e-005a06d039-ae42-ams3a</RequestId><HostId>ae42-ams3a-ams3</HostId></Error>"

  • Just in case this might be helpful for others: you will get this error if you try connecting to a specific space's url. Make sure you just connect to the datacenter like: then you'll see your space(s) once connected.

  • braspencer your answer helped a lot!

  • Hi @johngannon. I would like to inform that I am having the same issues as the post author with authenticating to spaces as well using Postman with AWS Signature as authorization header. The postman interface when selecting AWS authentication accepts following parameters:

    • AccessKey
    • SecretKey
    • AWS Region (Optional)
    • Service Name (Optional)
    • Session Token (Optional)

    Spaces responds with 403:

    <?xml version="1.0" encoding="UTF-8"?>

    Removed specific elements of course.

    Is there any new information on the subject? Connecting with AWS SDK for NodeJS and PHP works fine for me, but not whilst connecting using Postman.


6 Answers

Facing same issue using SociallyDev Spaces-API

Following Node.JS code is working for me. I suspect, we need to set up minimum 4 connection parameters.

*var AWS = require('aws-sdk');
exports.getBuckets = async function(req, res) 
  var options = {
    'endpoint' : '',
    'accessKeyId' : 'XXXX',
    'secretAccessKey' : 'YYY,
    'region' : 'nyc3'
  var s3 = new AWS.S3(options);
  s3.listBuckets(function(err, data) {
    if (err) console.log(err, err.stack); // an error occurred
    else     console.log(data);           // successful response
edited by asb

Was this resolved in the end please? I am using Transmit 5 and getting the SignatureDoesNotMatch error. Can see my bucket though.


Auth fails with this error when the 'x-amz-content-sha256' header value is not set, might be relevant

i got it working like this:

For: get

in the postman tab authorization :
Type: AWS Signature
SecretKey : dvtz0NE8I7HxOX6lJlroHTvaUiN/vhKtXy/kzmIK8SM
AWS Region : ams3
Service Name : s3
Session Token : myTok

Have another answer? Share your knowledge.