2026 OpenClaw MeshMac: Cisco Webex Incoming Webhook to Broadcast Multi-Node Build Status and Failure Summaries

If you already ship chat from OpenClaw, treat Webex like our Mattermost webhook walkthrough or Microsoft Teams webhook multi-node guide: same gateway-first posture, different JSON field names. For topology, start with the multi-node deployment guide and the OpenClaw hub. Keep failure excerpts short so mobile clients stay readable and log payload hashes instead of raw bodies.

Pain points this pattern removes

1. Secret sprawl. Copying the Webex URL onto every Mac multiplies leak paths and makes rotation chaotic.
2. Ambiguous ownership. Without a queue, two runners can race to post partial states during retries.
3. Opaque failures. Teams only see CI green while the gateway never logged an outbound POST.

Webhook configuration

Pick one sender. One OpenClaw gateway terminates TLS to webexapis.com. Workers enqueue terminal-state JSON like multi-node deploy and task queue sync describes.

Create the Webex Incoming Webhook. In the target space add the integration, name it after CI, copy the HTTPS URL once, and treat the path as a bearer credential.

Wire the gateway. POST application/json with markdown: headline, branch, commit, mesh_node_id, provider_run_id, optional failure excerpt, and run_url as a link.

Verify egress. Curl a probe from the gateway using the same proxy env as the service. Match timeouts to gateway rate limits and session concurrency so slow Webex responses do not wedge workers.

• Never log full URLs—hostname plus last four path characters only.
• Split staging and production hooks.
• Corporate proxy: use the same CA bundle as OpenClaw.

Least privilege

Store the URL under /etc/openclaw/secrets.d/webex/build-status.url at mode 0440, root-owned, group openclaw-notify, per secrets and least privilege on MeshMac nodes. Developers and CI users stay out of that group.

Skip broad Webex bot tokens on builders unless REST beyond cards is required; isolate extra API creds in a second file.

Rotation: new hook, swap file, reload, probe, revoke old URL; log steps with IM alerts and token rotation.

Retry and backoff

Transient saturation yields 429 or 503. Use exponential backoff with full jitter, cap attempts, honor Retry-After, and serialize posts per space to avoid herds.

Before emit, dedupe provider_run_id plus terminal state; patterns match task queue retry steps and streaming backpressure.

Cite these baselines: markdown under about two kilobytes, a few dozen posts per minute per space during incidents unless admins raise limits, client timeout roughly ten to twenty seconds.

Common 4xx and 5xx handling

Multi-node collaboration value

Shared queues make the gateway the hub: identical schema from every seat, one operator timeline, no secret redistribution when you add Macs, and a single egress audit trail for Webex TLS.

If executives live in Microsoft while engineers stay in Webex, reuse the same normalized stream for Teams streaming summaries.

Checklist and troubleshooting

• Gateway curl returns HTTP 200 and a visible card.
• Workers emit terminal transitions only.
• Cache records provider_run_id plus state.
• Firewall allows webexapis.com on port 443 from the gateway subnet.
• Rotation doc lists owner and rollback order.

CI is green but Webex is silent

Check gateway logs for POST status, non-empty markdown, live integration, curl as the service UID.

Only some Macs lose notifications

Stale direct POSTs—enforce gateway-only egress.

Duplicate cards after Wi-Fi blips

Retries without dedupe—tighten keys and lower parallel posters per space.