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A MediaPackage origin endpoint is generally an output for downstream delivery, not the ingest address to paste into YouTube. For a YouTube encoder, use the server URL and stream key shown in YouTube Live Control Room. If the 403 appears while AWS is creating or managing the endpoint, investigate AWS authorization instead. First identify which request is failing: these are separate services and authorization boundaries.
First identify where the 403 appears
The same symptom can refer to three different requests. A fix for one will not necessarily affect the others.
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| Where you see the error | What the request is doing | First check |
|---|---|---|
| AWS console or API | Creating, listing, or managing a MediaPackage endpoint | Record the failed API action, AWS identity or role, Region, MediaPackage generation, and complete error response. |
| A MediaPackage endpoint URL requested by a player or CDN | Retrieving content for playback or delivery | Check the endpoint’s delivery and authorization configuration and identify which client made the request. |
| Encoder attempting to reach YouTube | Sending a live feed to YouTube ingest | Check that the encoder uses YouTube’s server URL and matching stream key, with the correct ingest protocol. |
Do not treat a successful request at one layer as proof that another is working. An encoder reaching YouTube does not establish AWS API permissions; managing an AWS endpoint successfully does not establish valid YouTube ingest settings.
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If the 403 is from an AWS MediaPackage operation
AWS describes a 403 response for the MediaPackage origin-endpoint API as an authorization failure that may result from insufficient authentication credentials. The response definition says: “403 Forbidden response AWS Elemental MediaPackage cannot authorize the request, possibly due to insufficient authentication credentials.” See the AWS MediaPackage origin endpoints API reference.
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Check the identity and exact action
- Capture the complete AWS error response and the operation that failed. “MediaPackage returned 403” alone does not identify which permission is missing.
- Confirm the AWS account, active IAM user or role, and Region used by the console, SDK, or other client.
- Check whether that identity is authorized for the specific operation it attempted. Avoid applying a broad policy based only on the status code.
- Confirm whether the workflow uses MediaPackage v1 or v2. AWS documents separate live workflow endpoints and regional service endpoints; the generation and Region matter when identifying the API call and its permissions. See AWS Elemental MediaPackage endpoints and quotas.
For MediaPackage v2 with CDN authorization
For MediaPackage v2, AWS documents that an AccessDeniedException may indicate insufficient permissions. When CDN authorization is configured, AWS also documents a Secrets Manager throttling condition that can surface as an access-denied exception. Include that dependency in the investigation rather than assuming every v2 403 is fixed by changing an IAM permission. See the MediaPackage v2 Live API reference.
If you entered a MediaPackage endpoint in YouTube
This is likely a workflow mismatch, not a confirmed diagnosis of a particular 403. A MediaPackage origin endpoint is used for output to downstream CDNs or playback devices; YouTube’s encoder setup instead asks for YouTube’s own ingest details. AWS describes origin endpoints in its guides to creating an origin endpoint and getting started with live content delivery.
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YouTube’s instruction is: “To start streaming, enter your YouTube Live server URL and stream key into your encoder.” Find those values in YouTube Live Control Room, then enter them in the encoder you are using. Do not substitute the MediaPackage playback URL for YouTube’s ingest server URL. See YouTube’s encoder setup instructions.
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Set the YouTube ingest protocol and credentials correctly
- Open YouTube Live Control Room. Select or configure the stream and copy the server URL and stream key displayed for that setup.
- Choose the matching ingest protocol. YouTube documents RTMP/RTMPS encoder workflows and a separate HLS ingestion path. Use the URL and key associated with the selected protocol and stream configuration; do not mix a URL from one setup with credentials from another.
- Enter the details in your encoder. Put YouTube’s server URL in the encoder’s server or ingest URL field and the matching key in its stream key field.
- Start the encoder and check the failing layer. If AWS returned the error during an AWS API operation, resolve that AWS request separately. If the encoder cannot connect to YouTube, verify the YouTube URL, key, and protocol against Live Control Room.
YouTube documents RTMPS encryption, HLS stream setup, and live-streaming tips. Follow the instructions for the ingest path you selected. The information available here does not establish a codec, bitrate, keyframe interval, or latency setting for your particular encoder and stream profile, so those should not be guessed as a remedy for a 403.
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Troubleshoot by symptom
- The AWS console or API returns 403 when creating or managing an endpoint: identify the exact action, identity, Region, generation, and full error; check authorization for that action. For v2 with CDN authorization, investigate the documented Secrets Manager throttling condition as well.
- A playback client or CDN receives 403 from the endpoint URL: treat this as a delivery request, not YouTube ingest. Identify the requesting client and review the endpoint’s delivery and authorization setup.
- The encoder rejects or cannot connect to YouTube after using a MediaPackage URL: replace it with the YouTube Live server URL and matching stream key from Live Control Room, then verify the selected ingest protocol.
- AWS endpoint management works, but YouTube does not receive the stream: AWS API authorization success does not validate the encoder’s YouTube URL, key, or protocol. Check those settings in YouTube Live Control Room.
- YouTube ingest works, but AWS endpoint management still returns 403: YouTube connectivity does not prove AWS authorization. Investigate the failed AWS operation and identity independently.
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