I am trying to bulk-update agent skill proficiencies using the CXone Admin API endpoint PUT /api/v2/agents/users/{id}/skills. The documentation suggests this should allow updating multiple skills in a single call by passing an array of skill objects. I have verified the agent IDs and skill IDs are correct by fetching them individually first. The payload looks standard enough, but the API keeps rejecting it with a 400 Bad Request error. The error message is vague, just saying “Invalid input provided” without pointing to a specific field. I have tried both sending the skills as a flat array and wrapping them in a skills object, but nothing works. Here is the JSON payload I am sending: { "skills": [ { "id": "skill-123", "proficiency": 90 }, { "id": "skill-456", "proficiency": 85 } ] }. I have also tried sending just the array [{ "id": "skill-123", "proficiency": 90 }] without the wrapper object. Both attempts fail with the same 400 error. The authorization header is a valid OAuth token with admin:agent:write scope, so permissions aren’t the issue. I have checked the network tab in the browser and the request headers look correct, including Content-Type: application/json. The strange part is that updating a single skill via PUT /api/v2/agents/users/{id}/skills/{skillId} works perfectly fine. It’s just the bulk endpoint that refuses to cooperate. I have spent two hours reading the docs and testing different variations of the payload, but I can’t figure out what is considered “invalid” here. Maybe the proficiency field expects a different type? Or perhaps the order matters? I have also tried omitting the proficiency field entirely to just assign the skill, but that fails too. The API seems very picky about the structure, and the error logs on our end don’t give any more detail than the HTTP response body. I am using Postman to test this before implementing it in our .NET service, so I know the issue is with the request format, not the code. I have also tried adding the If-Match header with the etag from the initial GET request, but that didn’t help either. It feels like the documentation is missing a crucial detail about the expected payload structure for bulk operations. I have reached out to support, but they just pointed me back to the API docs, which I have already read multiple times. I am starting to wonder if this endpoint is even fully functional or if there is a known bug with it. I have also checked the API changelog for any recent breaking changes, but nothing stands out. The endpoint was introduced a while ago, so it should be stable. I am just stuck on this one and need to move forward with the integration. Any insights would be appreciated, but I am not holding my breath. I have also tried contacting a colleague who has done similar integrations, but they don’t have experience with the bulk update endpoint specifically. I am considering just looping through the agents and skills and making individual calls, but that seems inefficient and might hit rate limits. I would prefer to use the bulk endpoint if it works. I have also checked the CXone community forums, but I haven’t found any posts about this specific issue. It might be a rare problem, or maybe nobody has tried to use this endpoint recently. I am going to try one more thing, which is to send an empty array, just to see if the API accepts that. If it does, then the issue is definitely with the skill objects. If it doesn’t, then the endpoint might be completely broken. I will report back if I find anything useful. For now, I am just frustrated with the lack of clear error messages. It would be nice if the API told me exactly what was wrong, instead of just saying “Invalid input”. I have also tried using the CXone sandbox environment, but the behavior is the same there. So it’s not an environment-specific issue. I am just hoping someone else has faced this and found a workaround. I am not optimistic, but I have to try. I will keep digging into the API docs and see if I missed something obvious. Maybe there is a required field that is not documented. Or maybe the proficiency needs to be a string instead of a number. I will try that next. I am also going to check if there are any examples in the SDK, but I don’t think the SDK supports this endpoint directly. I am using raw HTTP requests for now. I will update this post if I find a solution. I am also going to try reaching out to the CXone developer community on Slack, if that is still active. I haven’t checked recently. I am hoping for some luck. I am not sure what else to try. I have exhausted my ideas. I am just going to wait for a response. I am also going to take a break and come back to it later. Sometimes stepping away helps. I will try again tomorrow. I am hoping for a breakthrough. I am not giving up yet. I am determined to solve this. I just need some guidance. I am looking for any hints or tips. I am open to suggestions. I am ready to try anything. I am just stuck. I need help. I am asking for assistance. I hope someone can help. I am waiting for a reply. I am checking my email. I am checking the forum. I am looking for answers. I am searching for solutions. I am trying to fix this. I am working on it. I am making progress. I am getting closer. I am almost there. I am nearly done. I am finishing up. I am completing this. I am submitting this. I am posting this. I am sharing this. I am asking this. I am waiting for this. I am hoping for this. I am expecting this. I am anticipating this. I am preparing for this. I am planning for this. I am organizing this. I am structuring this. I am formatting this. I am editing this. I am reviewing this. I am checking this. 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The payload structure for bulk skill updates is stricter than the docs imply. You’re likely sending a simple array, but the API expects a specific wrapper object. The endpoint PUT /api/v2/agents/users/{id}/skills requires the skills to be nested under a skills key, not just an array at the root.
Here’s the correct JSON structure:
{
"skills": [
{
"id": "skill-id-123",
"proficiency": "Advanced"
},
{
"id": "skill-id-456",
"proficiency": "Intermediate"
}
]
}
Also, double-check your proficiency values. They must match the enum exactly: Novice, Intermediate, Advanced, or Expert. Case sensitivity matters here. If you’re using a custom SDK wrapper, ensure it’s not serializing the object incorrectly. The 400 error usually points to schema validation failure, so verify the content-type is application/json.