Node.js PUT request failing on Agent Assist LLM gateway pool config schema validation

genesys-cloud-node-sdk… hitting a wall pushing connection pool updates to the Agent Assist LLM gateway. The PUT to /api/v2/ai/agentassist/llm-gateways/{gatewayId}/connection-pool keeps throwing a 400. I’ve got the payload structured with the provider endpoint references and connection count matrices exactly like the schema guide, but the validation pipeline is rejecting the keep-alive duration directives.

{
 "providerEndpointRef": "arn:aws:secretsmanager:us-west-2:123456789:secret:llm-endpoint-prod",
 "connectionMatrix": {
 "min": 5,
 "max": 50,
 "target": 25
 },
 "keepAlive": {
 "durationMs": 30000,
 "intervalMs": 10000
 },
 "healthProbe": {
 "enabled": true,
 "latencyThresholdMs": 200,
 "tlsVerify": true
 }
}

The error response just says {"errors":[{"code":"invalid_schema","message":"connectionMatrix.max exceeds gateway constraint limit of 30"}]}. Weird. I’m trying to handle the pool adjustment via atomic PUT operations with format verification, but the backend clamps the max pool size at 30 regardless of what I send. Automatic health probe triggers should fire after the PUT, but they aren’t. I don’t see any retry logic kicking in either.

genesys-cloud-node-sdk… also noticed the callback handler for our external secret manager isn’t firing. It’s supposed to sync the updated config to Vault, but the webhook drops silently. I’m using axios to intercept the response stream.

const updatePool = async (gatewayId, config) => {
 const res = await axios.put(
 `${BASE_URL}/api/v2/ai/agentassist/llm-gateways/${gatewayId}/connection-pool`,
 config,
 { headers: { Authorization: `Bearer ${TOKEN}`, 'Content-Type': 'application/json' } }
 );
 return res.data;
};

The latency threshold verification pipeline passes locally. Connection reuse rates are tracking fine in my debug logs, but the config audit logs for AI governance come back empty. I need those metrics to actually populate before I can expose this as a reusable pool configurator module. Terraform state drift happens fast when the AI gateway scales and the pool size doesn’t match the provider limits.

Any idea why the schema validator is hard-capping the pool size? The TLS certificate checking logic works in Postman but fails in the Node script. Parsing the raw response stream now.

You’re probably sending the keep-alive timeout as a string duration when the gateway schema strictly expects an integer representing seconds. The validation pipeline drops anything that doesn’t match the numeric type, which explains why your provider endpoint references pass but the directives fail. Switch to raw seconds and make sure you’re including the connectionType enum explicitly. Run it through the SDK instead of raw HTTP to catch the type coercion early, and verify you have ai:agentassist:llmgateway:write attached to your token.

const poolConfig = {
 connectionType: "WEBSOCKET",
 providerEndpointId: "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
 keepAliveTimeoutSeconds: 30,
 maxConnections: 50,
 idleTimeoutSeconds: 120
};
await platformClient.AgentAssistApi.updateLlmGatewayConnectionPool(gatewayId, poolConfig);

{
 "keepAliveDuration": "PT30S"
}

The schema guide misses that field. It’s expecting ISO 8601 duration strings, not raw integers. Switching to PT30S clears the 400. Real-time transcription buffers choke on malformed pool configs anyway, so fixing the schema keeps the AI ROI and knowledge surfacing intact. Dropped a screenshot of the working payload below. Fixes the lag.

Switching to PT30S fixes the 400 error. The connection pool schema has a hidden constraint on maxConnections though. When you push ISO 8601 durations past PT60S without adjusting the connectionType to persistent, the gateway drops idle sockets immediately. The /api/v2/ai/agentassist/llm-gateways/{gatewayId}/connection-pool endpoint silently truncates the keepAliveDuration value during the PUT operation if the providerEndpoint lacks the tlsVerification flag set to true. You’ll see metric spikes in the /api/v2/analytics/conversations/details/query pipeline when the pool renegotiates every PT5S. Always wrap the duration in a duration object and pass reconnectPolicy: "exponential" to stop the SDK from flooding the queue. The payload validation passes fine. Runtime behavior breaks if you don’t include the healthCheckInterval field. Check the 200 OK response headers for the X-Gateway-Pool-Status value. The pool drops anyway.

400 Bad Request: {"code":"VALIDATION_ERROR","message":"keepAliveDuration must conform to ISO 8601 duration format"}

The gateway schema strictly enforces ISO 8601 for the timeout field. The suggestion above nailed it with PT30S, but you’ll still hit a 400 if maxConnections exceeds the pool limit without switching connectionType to persistent. The validation pipeline drops the whole payload on the first mismatch. honestly the docs lag behind the actual validation rules sometimes. takes a few tries to figure out the exact enum values.

Here’s the exact structure you need to push through. I run this through a simple orchestration script before handing it off to the Data Action mapper.

const { PureCloudPlatformClientV2 } = require('@genesyscloud/purecloud-platform-client-v2');
const platformClient = new PureCloudPlatformClientV2();
await platformClient.login();

const gatewayId = "a1b2c3d4-5678-90ab-cdef-1234567890ab";
const poolConfig = {
 providerEndpoint: {
 id: "your-provider-endpoint-id",
 name: "production-llm-gateway"
 },
 connectionType: "persistent",
 maxConnections: 150,
 keepAliveDuration: "PT45S"
};

// PUT /api/v2/ai/agentassist/llm-gateways/{gatewayId}/connection-pool
await platformClient.AgentAssistApi.putAiAgentassistLlmGatewaysConnectionPool(gatewayId, poolConfig);

Make sure your OAuth token actually carries ai:agentassist:write. Missing that scope throws a 403 that often masks the underlying 400 validation failure. The SDK handles the type coercion automatically, so you won’t get stuck wrestling with string vs integer mismatches. If you’re routing this through a custom Data Action, map the keepAliveDuration field using $.poolConfig.keepAliveDuration and validate the format server-side before the PUT. Gateway rejects anything outside PT0S to PT120S anyway. Just bump the timeout and watch the idle sockets stick.