feishu_base plugin API_BASE_URL failed

[phantomedc]

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Dify version

1.7.1

Plugin version

0.0.4

Cloud or Self Hosted

Self Hosted (Docker)

Steps to reproduce

An error occurred in the plugin, please contact the author of langgenius/feishu_base/feishu_base for help, error type: Exception, error details: {'msg': 'ip 116.132.239.105 is denied by app setting', 'error': {'log_id': '20260507152939F55482F45984CC996304', 'troubleshooter': '排查建议查看(Troubleshooting suggestions): https://open.feishu.cn/search?from=openapi&log_id=20260507152939F55482F45984CC996304&code=99991401&method_id=6965347212289441794'}, 'data': None, 'log_id': '20260507152939C86B4E7FBA798B996C93', 'code': 99991401}

lark-plugin-api.solutionsuite.cn/lark-plugin this API_BASE_URL maybe deprecated, it's not worked,alyways return ip denied,and the ip is not my real ip

✔️ Error log

{
"data": null,
"log_id": "20260507152059D9209D53804BFDACEBE6",
"code": 99991401,
"msg": "ip 116.132.239.109 is denied by app setting",
"error": {
"log_id": "20260507152059198AB56138B7CE6C7119",
"troubleshooter": "排查建议查看(Troubleshooting suggestions): https://open.feishu.cn/search?from=openapi&log_id=20260507152059198AB56138B7CE6C7119&code=99991401&method_id=7018394812408004610"
}
}

[dosubot]

This error (99991401 - ip is denied by app setting) is coming from the Feishu platform itself, meaning your Dify server's outbound IP address is not whitelisted in your Feishu app configuration.

How to fix:

1. Go to the Feishu Developer Console → your app → Security Settings
2. Add your server's outbound IP address (e.g., 116.132.239.105 / 116.132.239.109 from your logs) to the IP Whitelist

Why this happens: The feishu_base plugin routes requests through lark-plugin-api.solutionsuite.cn [1], and Feishu enforces IP restrictions at the app level. The plugin does not currently support configuring a custom API base URL or proxy — the endpoint is hardcoded [2].

If whitelisting your IP isn't feasible (e.g., dynamic IPs), your options are:

• Disable the IP whitelist in your Feishu app settings (if your security policy allows)
• Use a static outbound IP (e.g., NAT gateway) and whitelist that

To reply, just mention @dosu.

---

Docs are dead. Just use Dosu.

[phantomedc]

This error (99991401 - ip is denied by app setting) is coming from the Feishu platform itself, meaning your Dify server's outbound IP address is not whitelisted in your Feishu app configuration.

How to fix:

1. Go to the Feishu Developer Console → your app → Security Settings
2. Add your server's outbound IP address (e.g., 116.132.239.105 / 116.132.239.109 from your logs) to the IP Whitelist

Why this happens: The feishu_base plugin routes requests through lark-plugin-api.solutionsuite.cn [1], and Feishu enforces IP restrictions at the app level. The plugin does not currently support configuring a custom API base URL or proxy — the endpoint is hardcoded [2].

If whitelisting your IP isn't feasible (e.g., dynamic IPs), your options are:

• Disable the IP whitelist in your Feishu app settings (if your security policy allows)
• Use a static outbound IP (e.g., NAT gateway) and whitelist that

To reply, just mention @dosu.

Docs are dead. Just use Dosu.

this ip is not my real ip,i don't know where it from

[dosubot]

That makes sense — the IP (116.132.239.105 / 116.132.239.109) is not your server's IP. It belongs to the proxy server that the plugin routes through.

The feishu_base plugin doesn't call Feishu's API directly. Instead, all requests go through an intermediate relay at lark-plugin-api.solutionsuite.cn [1]. So the flow is:

Your Dify Server → lark-plugin-api.solutionsuite.cn (proxy) → Feishu API

Feishu sees the proxy's outbound IP, not yours. That's why the denied IP is unfamiliar.

To fix this, you'd need to whitelist the proxy server's IPs (116.132.239.105, 116.132.239.109) in your Feishu app's security settings — even though they aren't your own IPs. Alternatively, if the Feishu app has IP whitelisting enabled but you didn't intentionally configure it, you can try disabling the IP whitelist entirely in your Feishu Developer Console under Security Settings.

This is arguably a limitation of the current plugin architecture — users have no control over the proxy's IP, and if it changes, whitelists break. You may want to raise this as a feature request to support direct Feishu API access without the proxy.

To reply, just mention @dosu.

---

Docs are dead. Just use Dosu.

[phantomedc]

Solved by disabling the app IP whitelist setting.

[dosubot]

Hi, @phantomedc. I'm Dosu, and I'm helping the dify-official-plugins team manage their backlog and am marking this issue as stale.

Issue Summary

• You reported that feishu_base on Dify 1.7.1 / plugin 0.0.4 failed in a self-hosted Docker setup with Feishu error 99991401 - ip is denied by app setting.
• The issue was traced to the plugin routing requests through the hardcoded proxy lark-plugin-api.solutionsuite.cn, so Feishu saw the proxy's outbound IPs instead of your server's IP.
• The suggested workaround was to whitelist the proxy IPs or disable Feishu's IP whitelist, and you confirmed the issue was resolved by disabling the app IP whitelist.

Next Steps

• Please let us know if this is still relevant on the latest version of the dify-official-plugins repository.
• If it is still happening, you can keep the discussion open by commenting here; otherwise, this issue will be automatically closed in 5 days.

Thanks for your understanding and contribution.