Fix any error. Fast.

The `x-api-key` header you sent doesn't match an active Anthropic API key — usually because the env var isn't loaded, the key was rotated or revoked, you're using a Workspace key in the wrong workspace, or a wrong-provider key (Bedrock or Vertex) was sent to the direct Anthropic API.

Your application tried to open a TCP connection to Postgres and the OS rejected it — Postgres isn't listening on the host:port you specified, or a firewall blocked the connection.

V8's old-generation heap filled up and the garbage collector couldn't free enough space, so V8 aborts the process with a fatal allocation failure. Default heap is ~4GB on 64-bit; long-lived references (caches, listeners, closures, big arrays) prevent reclamation.

Your container starts, exits with a non-zero code (or is OOMKilled), the kubelet restarts it, it exits again — repeat. After several quick failures the kubelet enters CrashLoopBackOff, an exponential delay between restart attempts so you don't melt the node.

Your OpenAI organisation has run out of paid credit, hit its monthly hard limit, or hasn't added a payment method yet. Despite the 429 status, this is a billing problem — not a rate-limit problem — and retrying won't help.

Postgres rejected your connection because the server has hit `max_connections`. Each connection consumes ~10MB of RAM plus a backend process; the limit exists to protect the host from memory exhaustion.

Redis hit its `maxmemory` limit and the configured `maxmemory-policy` is `noeviction` (the default), so it refuses every write. Reads still work; commands that allocate memory return `OOM command not allowed when used memory > 'maxmemory'`.

The API key you sent in the `Authorization: Bearer ...` header doesn't match any active Stripe key — usually because of a test/live mode mismatch, a deleted or rolled key, copy-paste corruption, or a missing environment variable falling through to `undefined`.

You exceeded one of Anthropic's per-minute caps for the model and tier — RPM (requests/min), ITPM (input tokens/min), or OTPM (output tokens/min). Anthropic enforces all three independently and you can hit any one without breaching the others.

Anthropic's infrastructure is at capacity for the model you requested. This is server-side, not a problem with your code or your account — Claude is experiencing a traffic spike or capacity event and rejecting requests until load eases.

The IAM principal (user, role, or assumed role) making the request does not have an `Allow` statement for the action and resource being called, or an explicit `Deny` somewhere in the evaluation chain blocks it.

You exceeded GitHub's primary REST API rate limit — 60 requests/hour for unauthenticated calls, 5,000/hour for personal access tokens, or 15,000/hour for GitHub App installations. The response is HTTP 403 with `X-RateLimit-Remaining: 0`.