ECINT-6556: add alerts webhook listener skill#401
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Skill that sets up a local HTTP server to receive Nansen smart alert webhook payloads. Includes HMAC-SHA256 signature verification (sha256= prefixed), body size limits, localhost-only binding, and public tunnel setup via ngrok (recommended) or localtunnel (fallback). Tested end-to-end with live alerts — verified signature format, tunnel stability, and auto-disable recovery. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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OpenClaw Gateway webhooks aren't publicly reachable, so mark skill as local Claude Code only until OpenClaw exposes public webhook ingress. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
When OPENCLAW_GATEWAY_URL is set, the webhook server forwards verified alert payloads to the local OpenClaw Gateway /hooks/agent endpoint, triggering an agent turn for each alert. Supports Bearer token auth via OPENCLAW_AUTH_TOKEN. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
nansen-alerts-webhook-listenerthat sets up a local HTTP webhook server to receive Nansen smart alerts in real-timesha256=prefixed), 1 MB body limit, localhost-only binding, and graceful shutdownOPENCLAW_GATEWAY_URLis set, the server forwards verified payloads directly to the local OpenClaw Gateway/hooks/agentendpoint, triggering an agent turn per alert — no polling, real-time pushTest plan
common-token-transferalert (USDC >$10 on Ethereum)x-nansen-signatureheader format issha256=<hex>— signature verification works after stripping prefix🤖 Generated with Claude Code