LiteLLM / LiteLLM

LiteLLM Bulk Invite Virtual Keys Missing sk- Prefix Cause API Call Rejections

Fix LiteLLM bulk invite generated API keys that don't have sk- prefix and get rejected Includes evidence for LiteLLM troubleshooting demand.

Source-backed Last updated May 13, 2026 1 source Needs local verification

Category: LiteLLM
Error signature: Bulk invite API keys missing sk- prefix, rejected on any call
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: 1 public source URL

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

Bulk invite API keys missing sk- prefix, rejected on any call is a LiteLLM failure pattern reported for developers trying to fix litellm bulk invite generated api keys that don't have sk- prefix and get rejected. Based on the imported evidence, treat this as a tool-specific troubleshooting page rather than a generic API error.

Why this happens

LiteLLM issue #27849 reports that virtual keys generated by bulk invite CSV upload don't include the sk- prefix. These tokens are rejected on any API call, breaking the bulk user onboarding workflow entirely.

Common causes

When creating users via bulk invite CSV upload in LiteLLM, the generated access tokens in the response CSV are missing the required sk- prefix. Any API call with these tokens gets rejected, blocking team onboarding workflows.
LiteLLM issue #27849 reports that virtual keys generated by bulk invite CSV upload don't include the sk- prefix. These tokens are rejected on any API call, breaking the bulk user onboarding workflow entirely.

Quick fixes

Confirm the exact error signature matches Bulk invite API keys missing sk- prefix, rejected on any call.
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 Bulk invite API keys missing sk- prefix, rejected on any call 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 Bulk invite API keys missing sk- prefix, rejected on any call mean in LiteLLM?

Bulk invite API keys missing sk- prefix, rejected on any call indicates the workflow described by "LiteLLM Bulk Invite Virtual Keys Missing sk- Prefix Cause API Call Rejections" failed in a LiteLLM context. Start by confirming the exact signature and the component that emitted it.

What should I check first for Bulk invite API keys missing sk- prefix, rejected on any call?

Check whether this cause matches your environment: When creating users via bulk invite CSV upload in LiteLLM, the generated access tokens in the response CSV are missing the required sk- prefix. Any API call with these tokens gets rejected, blocking team onboarding workflows.

Is the Bulk invite API keys missing sk- prefix, rejected on any call guidance source-backed?

The "LiteLLM Bulk Invite Virtual Keys Missing sk- Prefix Cause API Call Rejections" page is labeled source-backed. It has 1 public source URL from github.com, so use that evidence status when deciding how much additional verification you need.

When should I avoid the quick fix for Bulk invite API keys missing sk- prefix, rejected on any call?

For "LiteLLM Bulk Invite Virtual Keys Missing sk- Prefix Cause API Call Rejections", 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 Bulk invite API keys missing sk- prefix, rejected on any call?

For "LiteLLM Bulk Invite Virtual Keys Missing sk- Prefix Cause API Call Rejections", 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.