Claude API ECONNRESET
Claude API ECONNRESET: Connection Reset During Request
TL;DR: ECONNRESET is a transport-level failure. It does not prove your Claude prompt is invalid or that the API key is bad.
What this error means
Claude API ECONNRESET means the TCP connection was closed unexpectedly by a peer, proxy, runtime, or network path before the response completed.
network network path
Is it code, key, rate limit, or server-side?
| Signal | Diagnosis |
|---|---|
| Provider | Claude |
| Error | ECONNRESET |
| Likely category | network |
| Likely fault area | network path |
Immediate checklist
- Check whether the reset occurs before headers, during streaming, or after a timeout.
- Compare local curl, production runtime curl, and a different network path.
- Review proxy, load balancer, keep-alive, and serverless timeout settings.
- Use idempotent retries only when your app can safely repeat the request.
cURL test command
curl https://api.anthropic.com/v1/messages \
--connect-timeout 10 \
--max-time 60 \
-H "x-api-key: $ANTHROPIC_API_KEY" \
-H "anthropic-version: 2023-06-01" \
-H "content-type: application/json" \
-d '{"model":"claude-3-5-haiku-latest","max_tokens":16,"messages":[{"role":"user","content":"ping"}]}' Run this from your server or terminal. llmping does not collect API keys and does not send this command for you.
Common fixes
- Raise serverless timeout if streaming responses are cut off.
- Disable stale keep-alive reuse if a proxy frequently resets old sockets.
- Retry with backoff for transient resets, but record reset timing for debugging.
- If only one network region resets, route Claude calls from a different region.