---
title: Tencent COS
icon: /images/tencent-logo.svg
description: Mount a Tencent Cloud Object Storage bucket via its S3-compatible API.
---
The Tencent resource is a thin wrapper over the [S3 resource](/python/resource/s3).
It maps a `TencentConfig` to an `S3Config` and reuses the exact same backend,
commands, and behavior as S3, it just derives the right COS endpoint from
`region`. Uses aioboto3 against Tencent COS's S3-compatible API.

The endpoint is computed from `region` as `cos.<region>.myqcloud.com`
(e.g. `cos.ap-guangzhou.myqcloud.com`). Pass `endpoint_url` to override.

<Note>
Tencent COS bucket names include the APPID suffix, e.g.
`my-bucket-1250000000`. Use the full name (with the suffix) for `bucket`.
</Note>

## Config

```python
import os

from mirage import MountMode, Workspace
from mirage.resource.tencent import TencentConfig, TencentResource

config = TencentConfig(
    bucket=os.environ["COS_BUCKET"],          # e.g. my-bucket-1250000000
    region=os.environ.get("COS_REGION", "ap-guangzhou"),
    access_key_id=os.environ["COS_SECRET_ID"],
    secret_access_key=os.environ["COS_SECRET_KEY"],
    # Optional:
    # endpoint_url="https://cos.ap-guangzhou.myqcloud.com",
    # timeout=30,
    # proxy="http://proxy:8080",
)
resource = TencentResource(config)
ws = Workspace({"/data": resource}, mode=MountMode.READ)
```

Both `READ` and `WRITE` modes are supported.

## Example

```python
import asyncio
import os

from dotenv import load_dotenv

from mirage import MountMode, Workspace
from mirage.resource.tencent import TencentConfig, TencentResource

load_dotenv(".env.development")

config = TencentConfig(
    bucket=os.environ["COS_BUCKET"],
    region=os.environ.get("COS_REGION", "ap-guangzhou"),
    access_key_id=os.environ["COS_SECRET_ID"],
    secret_access_key=os.environ["COS_SECRET_KEY"],
)
resource = TencentResource(config)


async def main() -> None:
    ws = Workspace({"/data/": resource}, mode=MountMode.READ)

    r = await ws.execute("ls /data/")
    print(await r.stdout_str())

    r = await ws.execute("find /data/ -name '*.json' | head -n 5")
    print(await r.stdout_str())


if __name__ == "__main__":
    asyncio.run(main())
```

## Notes

- Tencent COS reports `ResourceName.S3` and routes through the same `core/s3`
  implementation, so the full S3 shell-command set applies. See the
  [S3 resource](/python/resource/s3) for the complete command reference,
  range reads, streaming, and the index cache fast path.
- For credential setup, see [Tencent COS Setup](/home/setup/tencent).