LiteLLM / LiteLLM

LiteLLM RouterRateLimitError Missing Retry-After Header Fix

Fix missing Retry-After header in LiteLLM RouterRateLimitError so downstream clients can properly handle rate limit cooldown Includes evidence for LiteLLM troubleshooting demand.

Source-backed Last updated May 13, 2026 2 sources Needs local verification

Category: LiteLLM
Error signature: RouterRateLimitError: No deployments available for selected model, Try again in X seconds (no Retry-After header)
Quick fix: Reduce request pressure, check quota or plan limits, and retry with backoff instead of immediate repeated requests.
Updated: May 13, 2026
Verification status: Source-backed
Evidence: 2 public source URLs

Before you change production

This page includes public source URLs in the imported troubleshooting record. Compare those references with your version and environment before applying changes.

Reproduce the smallest failing action and save non-secret logs before changing configuration.
Check versions for LiteLLM, related SDKs, package managers, CI runners, and hosting providers.
Change one setting or dependency at a time, then rerun the same failing command or request.
Avoid destructive commands, credential rotation, billing changes, or security relaxations without a rollback plan.

What this error means

RouterRateLimitError: No deployments available for selected model, Try again in X seconds (no Retry-After header) is a LiteLLM failure pattern reported for developers trying to fix missing retry-after header in litellm routerratelimiterror so downstream clients can properly handle rate limit cooldown. Based on the imported evidence, treat this as a tool-specific troubleshooting page rather than a generic API error.

Why this happens

Open issue on BerriAI/litellm with associated PR. RouterRateLimitError raised without Retry-After header when all model deployments are in cooldown after upstream 429s. Affects automated retry logic in production systems.

Common causes

LiteLLM is widely used as an AI model gateway. When all deployments are in cooldown, the lack of Retry-After header means downstream clients (OpenAI SDK, custom agents) can't programmatically retry, causing cascading failures.
Open issue on BerriAI/litellm with associated PR. RouterRateLimitError raised without Retry-After header when all model deployments are in cooldown after upstream 429s. Affects automated retry logic in production systems.

Quick fixes

Confirm the exact error signature matches RouterRateLimitError: No deployments available for selected model, Try again in X seconds (no Retry-After header).
Check the LiteLLM account, local tool state, and provider configuration involved in the failing workflow.
Reduce request pressure, check quota or plan limits, and retry with backoff instead of immediate repeated requests.

Platform/tool-specific checks

Verify the command, editor, extension, or API client that produced the error.
Compare local settings with CI, deployment, or editor-level settings when the error appears in only one environment.
Avoid deleting credentials, local model data, or project settings until the failing scope is clear.

Step-by-step troubleshooting

Capture the exact error message and the command, editor action, or request that triggered it.
Check whether the failure is account/auth, quota/rate, model/provider, local runtime, or deployment configuration.
Review the source evidence below and compare it with your environment.
Apply one change at a time and rerun the smallest failing action.
Keep the working fix documented for the team or deployment environment.

How to prevent it

Keep provider/tool configuration documented.
Record non-secret diagnostics such as tool version, provider name, model name, and command path.
Add a lightweight check before CI or production workflows depend on the tool.

Diagnostic flow for this page

Match RouterRateLimitError: No deployments available for selected model, Try again in X seconds (no Retry-After header) exactly before applying the quick fix.
Compare the failing environment with LiteLLM versions, account scope, provider settings, and deployment context.
Check the listed common causes in order, starting with the cause that best matches your logs.
Use the evidence status below to decide whether to confirm against public sources or official documentation.
Apply one reversible change, rerun the smallest failing action, and keep rollback notes.

FAQ

What does RouterRateLimitError: No deployments available for selected model, Try again in X seconds (no Retry-After header) mean in LiteLLM?

RouterRateLimitError: No deployments available for selected model, Try again in X seconds (no Retry-After header) indicates the workflow described by "LiteLLM RouterRateLimitError Missing Retry-After Header Fix" failed in a LiteLLM context. Start by confirming the exact signature and the component that emitted it.

What should I check first for RouterRateLimitError: No deployments available for selected model, Try again in X seconds (no Retry-After header)?

Check whether this cause matches your environment: LiteLLM is widely used as an AI model gateway. When all deployments are in cooldown, the lack of Retry-After header means downstream clients (OpenAI SDK, custom agents) can't programmatically retry, causing cascading failures.

Is the RouterRateLimitError: No deployments available for selected model, Try again in X seconds (no Retry-After header) guidance source-backed?

The "LiteLLM RouterRateLimitError Missing Retry-After Header Fix" page is labeled source-backed. It has 2 public source URLs from github.com, so use that evidence status when deciding how much additional verification you need.

When should I avoid the quick fix for RouterRateLimitError: No deployments available for selected model, Try again in X seconds (no Retry-After header)?

For "LiteLLM RouterRateLimitError Missing Retry-After Header Fix", avoid applying "Reduce request pressure, check quota or plan limits, and retry with backoff instead of immediate repeated requests." when the error text differs, the affected version or provider is different, or the change would touch credentials, billing, DNS, production deploy settings, or irreversible data.

What should I collect before debugging RouterRateLimitError: No deployments available for selected model, Try again in X seconds (no Retry-After header)?

For "LiteLLM RouterRateLimitError Missing Retry-After Header Fix", collect the failing LiteLLM command or request, non-secret configuration, versions, timestamps, request IDs when available, and the smallest reproduction that still triggers the signature.