CSTCloud Data Capsule
CSTCloud Data Capsule offers 20 GB of free object storage with an S3-compatible API.
Get S3 credentials
- Sign in at data.cstcloud.cn.
- Create a data space (your S3 bucket).
- Open Client access for that space.
- Create an AccessKey and save the Access Key ID and Secret Access Key (the secret is shown only once).
ShrimpSend settings
| Field | Value |
|---|---|
| Endpoint | https://s3.data.cstcloud.cn (include https://) |
| Region | us-east-1 |
| Bucket | Space name from Client access |
| Path-style access | On (required) |
| Access Key ID / Secret | From Client access |
Test connection
After saving, use Test connection. ShrimpSend runs a server-side HeadBucket probe and a client-side HEAD on a presigned URL.
If it fails, verify endpoint, path-style, region, bucket name, and keys. Check logs for serverProbe and S3 XML error codes.
Some providers (including Data Capsule) validate User-Agent. ShrimpSend sets ShrimpSend/1.0 S3Compat on direct S3 requests.
WebDAV (remote storage)
Data Capsule also offers WebDAV at https://data.cstcloud.cn/dav. Create WebDAV credentials in the console, then add a connection under Settings → WebDAV in ShrimpSend.
WebDAV uses the same *.cstcloud.cn hosts and CFCA certificate chain as S3. Backend connection tests need the same supplemental trust; upgraded servers handle this automatically.
The console only supports Zotero (8+) for WebDAV credentials. ShrimpSend sends the matching Zotero User-Agent for browsing and downloads; use the WebDAV username and password from the console (not your login password).
Important: Data Capsule WebDAV does not support uploads in ShrimpSend — browse and download only. To upload files, configure Settings → S3 with a Data Capsule S3 AccessKey instead.
CORS (Web)
For browser uploads, configure bucket CORS to allow your ShrimpSend Web origin with at least GET, PUT, and HEAD.