AWS / Cloud Platforms

AWS Lambda InvalidClientTokenId — IAM Access Key Authentication Failure

Fix AWS Lambda/CLI access key authentication errors (InvalidClientTokenId, ExpiredTokenException, SignatureDoesNotMatch) when using IAM credentials across AWS services Includes evidence for AWS troubleshooting demand.

Source-backed Last updated May 17, 2026 2 sources Needs local verification

Category: Cloud Platforms
Error signature: InvalidClientTokenId: The security token included in the request is invalid
Quick fix: Verify the account session, API key, provider settings, and environment where the failing tool is running.
Updated: May 17, 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 AWS, 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

InvalidClientTokenId: The security token included in the request is invalid is a AWS failure pattern reported for developers trying to fix aws lambda/cli access key authentication errors (invalidclienttokenid, expiredtokenexception, signaturedoesnotmatch) when using iam credentials across aws services. Based on the imported evidence, treat this as a tool-specific troubleshooting page rather than a generic API error.

Why this happens

DDG confirms real AWS authentication error pages covering InvalidClientTokenId, ExpiredTokenException, and SignatureDoesNotMatch. AWS official documentation page exists with detailed troubleshooting. High commercial value as it blocks all AWS deployments and CI/CD pipelines.

Common causes

DDG confirms real AWS authentication error pages covering InvalidClientTokenId, ExpiredTokenException, and SignatureDoesNotMatch. AWS official documentation page exists with detailed troubleshooting. High commercial value as it blocks all AWS deployments and CI/CD pipelines.

Quick fixes

Confirm the exact error signature matches InvalidClientTokenId: The security token included in the request is invalid.
Check the AWS account, local tool state, and provider configuration involved in the failing workflow.
Verify the account session, API key, provider settings, and environment where the failing tool is running.

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 InvalidClientTokenId: The security token included in the request is invalid exactly before applying the quick fix.
Compare the failing environment with AWS 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 InvalidClientTokenId: The security token included in the request is invalid mean in AWS?

InvalidClientTokenId: The security token included in the request is invalid indicates the workflow described by "AWS Lambda InvalidClientTokenId — IAM Access Key Authentication Failure" failed in a Cloud Platforms context. Start by confirming the exact signature and the component that emitted it.

What should I check first for InvalidClientTokenId: The security token included in the request is invalid?

Check whether this cause matches your environment: DDG confirms real AWS authentication error pages covering InvalidClientTokenId, ExpiredTokenException, and SignatureDoesNotMatch. AWS official documentation page exists with detailed troubleshooting. High commercial value as it blocks all AWS deployments and CI/CD pipelines.

Is the InvalidClientTokenId: The security token included in the request is invalid guidance source-backed?

The "AWS Lambda InvalidClientTokenId — IAM Access Key Authentication Failure" page is labeled source-backed. It has 2 public source URLs from aws.amazon.com, docs.aws.amazon.com, so use that evidence status when deciding how much additional verification you need.

When should I avoid the quick fix for InvalidClientTokenId: The security token included in the request is invalid?

For "AWS Lambda InvalidClientTokenId — IAM Access Key Authentication Failure", avoid applying "Verify the account session, API key, provider settings, and environment where the failing tool is running." 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 InvalidClientTokenId: The security token included in the request is invalid?

For "AWS Lambda InvalidClientTokenId — IAM Access Key Authentication Failure", collect the failing AWS command or request, non-secret configuration, versions, timestamps, request IDs when available, and the smallest reproduction that still triggers the signature.