> For the complete documentation index, see [llms.txt](https://doc.duaer.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.duaer.com/troubleshooting/dingtalk-robot-310000.md).

# Fix DingTalk robot error 310000 in Duaer

When Duaer posts to a DingTalk group robot with HTTP Request and gets errcode 310000, a robot security check failed: keyword, signature, or IP allowlist.
## Post to a DingTalk robot from Duaer

[HTTP Request](/build/http-request.md): Method POST, URL the robot webhook, Send Body JSON, body {"msgtype":"text","text":{"content":{{ JSON.stringify($json.message) }}}}.

DingTalk returns HTTP 200 even on failure, so the Duaer node looks green. Read errcode in the output. Anything but 0 failed. Add [If](/build/if.md) and [Stop and Error](/build/stop-and-error.md) to surface it.

## Read errmsg for 310000

- keywords not in content: the robot has custom keywords and the message has none. Put a keyword at the start.
- sign not match or invalid timestamp: signing is on and the signature or timestamp is wrong. Use milliseconds, within one hour.
- ip … not in whitelist: an IP range is set and the Duaer egress IP is outside it. Self-hosted: add your server egress IP. Cloud: use keywords or signing.

## Sign requests in Duaer

1. Add [Edit Fields](/build/edit-fields.md) with a field ts set to {{ $now.toMillis() }} (milliseconds).
2. Add [Crypto](/build/crypto.md): Action Hmac, Type SHA256, Encoding BASE64, Property Name sign. Put the robot secret (starts with SEC) in the credential Hmac Secret.
3. Set Value to {{ $json.ts + "\n" + "SECyour-secret" }}, which is timestamp, newline, secret.
4. Append &timestamp={{ $json.ts }}&sign={{ encodeURIComponent($json.sign) }} to the [HTTP Request](/build/http-request.md) URL.

The secret sits in the Crypto node. Keywords are simpler when you do not need signing. Each robot accepts up to 20 messages a minute, so batch them.
## Questions

### Does Duaer have a DingTalk node?

Duaer calls the DingTalk robot webhook with HTTP Request and builds the signature with the Crypto node.

### Duaer shows success but nothing reaches the DingTalk group?

DingTalk returns HTTP 200 on failure too. Read errcode and errmsg in the Duaer node output. 310000 means a security check failed.

## Related

- [Call an API with HTTP Request in Duaer](https://doc.duaer.com/build/http-request.md)
- [Hash a value with Crypto in Duaer](https://doc.duaer.com/build/crypto.md)
- [Fix WeCom and Feishu group bot webhook failures in Duaer](https://doc.duaer.com/troubleshooting/wecom-feishu-bot-webhook-errors.md)
- [Configure Stop and Error in Duaer](https://doc.duaer.com/build/stop-and-error.md)