| name | tencentcloud-cos |
| description | Manage Tencent Cloud COS (Cloud Object Storage) buckets and objects.
Use whenever the user asks about COS / 对象存储 / Tencent Cloud bucket
operations: list buckets, list objects, upload, download, delete,
pre-signed URLs, calculate bucket size (du), batch delete with prefix,
copy objects between keys. Backed by the official cos-python-sdk-v5.
|
| license | Apache-2.0 |
| metadata | {"author":"acedatacloud","version":"1.0"} |
| connections | ["tencentcloud"] |
Tencent Cloud COS (Object Storage)
Manage Tencent Cloud COS buckets and objects via the official cos-python-sdk-v5 client.
Setup: See tencentcloud authentication for SecretId / SecretKey / region setup. The SDK reads TENCENTCLOUD_SECRET_ID / TENCENTCLOUD_SECRET_KEY / TENCENTCLOUD_REGION from the environment.
CLI (preferred)
The skill ships scripts/cos.py — a self-contained CLI that wraps every COS operation below. Prefer this over hand-rolled SDK calls when the user's request maps cleanly onto one of its subcommands; it's what the maintained code paths exercise.
COS="$SKILL_DIR/scripts/cos.py"; [ -f "$COS" ] || COS=$(find /tmp -maxdepth 8 -path '*/skills/*/scripts/cos.py' 2>/dev/null | head -1)
[ -f "$COS" ] || { echo "tencentcloud-cos script not found (SKILL_DIR=$SKILL_DIR)" >&2; exit 1; }
python3 $COS buckets
python3 $COS ls mydata-1250000000 --prefix images/
python3 $COS upload mydata-1250000000 ./report.pdf --key docs/report-2026.pdf
python3 $COS download mydata-1250000000 docs/report-2026.pdf --output ./out.pdf
python3 $COS url mydata-1250000000 docs/report-2026.pdf --expires 3600
python3 $COS du mydata-1250000000 --prefix logs/
python3 $COS cp mydata-1250000000 old/path.txt new/path.txt
python3 $COS batch-delete mydata-1250000000 --prefix temp/old/ --dry-run
python3 $COS batch-delete mydata-1250000000 --prefix temp/old/
python3 $COS info mydata-1250000000 docs/report-2026.pdf
Run python3 $COS --help (or python3 $COS <cmd> --help) for full flags. Pass --region <region> to override per-call.
When to Use
- List COS buckets across the account
- List objects in a bucket (with prefix / delimiter filtering)
- Upload / download files
- Delete a single object or batch-delete by prefix
- Generate pre-signed download URLs (private bucket sharing)
- Calculate bucket / prefix storage usage
- Copy objects within a bucket
Dependencies
pip install cos-python-sdk-v5
Bucket naming
Tencent Cloud bucket names always end in -<APPID>, e.g. mydata-1250000000. The APPID is the numeric account identifier. The SDK requires the full name-APPID form everywhere a bucket is named.
Quick start
import os
from qcloud_cos import CosConfig, CosS3Client
config = CosConfig(
Region=os.environ["TENCENTCLOUD_REGION"],
SecretId=os.environ["TENCENTCLOUD_SECRET_ID"],
SecretKey=os.environ["TENCENTCLOUD_SECRET_KEY"],
Scheme="https",
)
client = CosS3Client(config)
Workflows
List all buckets
resp = client.list_buckets()
for b in resp["Buckets"]["Bucket"]:
print(b["Name"], b["Location"], b["CreationDate"])
List objects in a bucket
resp = client.list_objects(Bucket="mydata-1250000000", Prefix="images/", Delimiter="/")
for obj in resp.get("Contents", []):
print(obj["Key"], int(obj["Size"]), obj["LastModified"])
marker = ""
while True:
resp = client.list_objects(Bucket="mydata-1250000000", Prefix="logs/", Marker=marker, MaxKeys=1000)
for obj in resp.get("Contents", []):
print(obj["Key"])
if resp.get("IsTruncated") != "true":
break
marker = resp["NextMarker"]
Upload a file
client.upload_file(
Bucket="mydata-1250000000",
Key="uploads/2026/report.pdf",
LocalFilePath="./report.pdf",
)
Download a file
client.download_file(
Bucket="mydata-1250000000",
Key="uploads/2026/report.pdf",
DestFilePath="./report.pdf",
)
Generate a pre-signed download URL
url = client.get_presigned_url(
Method="GET",
Bucket="mydata-1250000000",
Key="uploads/2026/report.pdf",
Expired=3600,
)
print(url)
Delete a single object
client.delete_object(Bucket="mydata-1250000000", Key="uploads/old-file.txt")
Batch delete by prefix (with dry-run safety)
to_delete = []
marker = ""
while True:
resp = client.list_objects(Bucket="mydata-1250000000", Prefix="temp/old/", Marker=marker, MaxKeys=1000)
for obj in resp.get("Contents", []):
to_delete.append({"Key": obj["Key"]})
if resp.get("IsTruncated") != "true":
break
marker = resp["NextMarker"]
print(f"Would delete {len(to_delete)} objects")
for o in to_delete[:10]:
print(" -", o["Key"])
Calculate bucket / prefix size (du)
total_bytes = 0
total_count = 0
marker = ""
while True:
resp = client.list_objects(Bucket="mydata-1250000000", Prefix="logs/", Marker=marker, MaxKeys=1000)
for obj in resp.get("Contents", []):
total_bytes += int(obj["Size"])
total_count += 1
if resp.get("IsTruncated") != "true":
break
marker = resp["NextMarker"]
print(f"{total_count} objects, {total_bytes / 1024 / 1024:.1f} MiB")
Copy objects within a bucket
client.copy_object(
Bucket="mydata-1250000000",
Key="new/path.txt",
CopySource={
"Bucket": "mydata-1250000000",
"Key": "old/path.txt",
"Region": os.environ["TENCENTCLOUD_REGION"],
},
)
Safety reminders
- Confirm batch deletes with the user before running. The
delete_objects call is irreversible — there's no recycle bin in COS by default.
- Pre-signed URLs are bearer tokens — anyone with the URL gets the object until it expires. Default to short expiries (1 hour) unless the user explicitly asks for longer.
- Cross-region operations require the source / destination Region in
CopySource. Mismatched region triggers NoSuchBucket.
download_file overwrites the destination without asking. Pick DestFilePath carefully when scripting in a loop.
Error patterns
| Symptom | Likely cause |
|---|
NoSuchBucket | Wrong region, wrong APPID suffix on the bucket name |
AccessDenied | Sub-account missing QcloudCOSReadOnlyAccess / QcloudCOSDataReadOnly etc. |
SignatureDoesNotMatch | SecretKey was pasted with leading / trailing whitespace, or the system clock is off by more than 5 minutes |
RequestTimeTooSkewed | Same — clock skew |
Console links
