[management] Expose live model discovery on the provider API

Adds POST /api/agent-network/catalog/providers/models, so the provider
form can offer the models an operator's own credential can reach instead
of only the compiled-in catalog.

A caller names a catalog provider and supplies either the key they are
typing (the record does not exist yet) or the id of a saved record whose
stored credential should be reused — which lets the dashboard refresh a
list without ever holding the key. The two are mutually exclusive:
accepting both would run an arbitrary credential under the identity of a
record the caller may only be permitted to read. When a record id is
given, the catalog id and upstream come from the record too, so the
credential cannot be aimed at a different vendor's endpoint.

Gated on Create rather than Read. This spends the operator's credential
against a third party, which is not something a read-only role should be
able to make the server do.

A provider with no listing endpoint answers 422 rather than 500: the
caller falls back to the catalog's own models on that outcome, so it has
to be distinguishable from a failure.

The region is read back out of the configured upstream by matching it
against the catalog's host template, since a provider record has no
region field and the operator already encoded one when they set up
inference. An upstream matching no template is refused rather than
guessed at — a wrong region would dial another account's endpoint.

shared/management/http/api/openapi.yml

@@ -5335,6 +5335,57 @@ components:
         - input_per_1k
         - output_per_1k
         - context_window
+    AgentNetworkModelDiscoveryRequest:
+      type: object
+      properties:
+        catalog_provider_id:
+          type: string
+          description: Catalog provider to query (AgentNetworkCatalogProvider.id). Determines the listing endpoint, the auth header and the response shape.
+          example: "bedrock_api"
+        upstream_url:
+          type: string
+          description: |
+            The upstream being configured. Used to reach vendors that serve their listing from the same host as inference, and to read back the region for those whose host embeds one. Ignored when provider_id is supplied.
+          example: "https://bedrock-runtime.eu-central-1.amazonaws.com"
+        api_key:
+          type: string
+          description: Credential to query the vendor with, for a provider that has not been saved yet. Mutually exclusive with provider_id.
+          example: "sk-..."
+        provider_id:
+          type: string
+          description: Existing Agent Network provider record whose stored credential and upstream should be used. Lets the form refresh the list without the client holding the key.
+          example: "ch8i4ug6lnn4g9hqv7m0"
+      required:
+        - catalog_provider_id
+    AgentNetworkModelDiscoveryResponse:
+      type: object
+      properties:
+        models:
+          type: array
+          description: Models the credential can reach, in the order the vendor returned them.
+          items:
+            $ref: '#/components/schemas/AgentNetworkDiscoveredModel'
+      required:
+        - models
+    AgentNetworkDiscoveredModel:
+      type: object
+      properties:
+        id:
+          type: string
+          description: |
+            Identifier to register on the provider record, in the form the vendor issues it. For Bedrock this is the region-prefixed inference-profile id, which is the only form AWS accepts at invoke time.
+          example: "eu.anthropic.claude-haiku-4-5-20251001-v1:0"
+        label:
+          type: string
+          description: Vendor-supplied display name, where the vendor supplies one.
+          example: "EU Anthropic Claude Haiku 4.5"
+        pricing_known:
+          type: boolean
+          description: Whether NetBird's shipped pricing table can price this model. When false the operator must set input/output rates, or requests to it would record a cost of zero.
+          example: true
+      required:
+        - id
+        - pricing_known
     AgentNetworkCatalogProvider:
       type: object
       properties:
@@ -14004,6 +14055,42 @@ paths:
           "$ref": "#/components/responses/forbidden"
         '500':
           "$ref": "#/components/responses/internal_error"
+  /api/agent-network/catalog/providers/models:
+    post:
+      summary: Discover the models a provider credential can reach
+      description: |
+        Asks the vendor which models the supplied credential can actually use, so the provider form can offer a live list instead of only the static catalog. The endpoint, auth header and response shape are taken from the catalog entry, never from the request.
+
+        Supply either an api_key together with the upstream_url being configured (before the provider is saved), or a provider_id of an existing record to reuse its stored credential.
+
+        Returns 422 for a catalog provider that has no listing endpoint (most gateways); the caller should fall back to the catalog's own model list. A model whose price the shipped table does not know is returned with pricing_known false, and the operator must set rates for it.
+      tags: [ Agent Network ]
+      security:
+        - BearerAuth: [ ]
+        - TokenAuth: [ ]
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/AgentNetworkModelDiscoveryRequest'
+      responses:
+        '200':
+          description: The models the credential can reach
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/AgentNetworkModelDiscoveryResponse'
+        '400':
+          "$ref": "#/components/responses/bad_request"
+        '401':
+          "$ref": "#/components/responses/requires_authentication"
+        '403':
+          "$ref": "#/components/responses/forbidden"
+        '422':
+          "$ref": "#/components/responses/validation_failed_simple"
+        '500':
+          "$ref": "#/components/responses/internal_error"
   /api/agent-network/providers:
     get:
       summary: List all Agent Network Providers

shared/management/http/api/types.gen.go

@@ -2120,6 +2120,18 @@ type AgentNetworkConsumption struct {
 // AgentNetworkConsumptionDimensionKind Whether this row counts a single end user or a single source group across every member.
 type AgentNetworkConsumptionDimensionKind string
 
+// AgentNetworkDiscoveredModel defines model for AgentNetworkDiscoveredModel.
+type AgentNetworkDiscoveredModel struct {
+	// Id Identifier to register on the provider record, in the form the vendor issues it. For Bedrock this is the region-prefixed inference-profile id, which is the only form AWS accepts at invoke time.
+	Id string `json:"id"`
+
+	// Label Vendor-supplied display name, where the vendor supplies one.
+	Label *string `json:"label,omitempty"`
+
+	// PricingKnown Whether NetBird's shipped pricing table can price this model. When false the operator must set input/output rates, or requests to it would record a cost of zero.
+	PricingKnown bool `json:"pricing_known"`
+}
+
 // AgentNetworkGuardrail defines model for AgentNetworkGuardrail.
 type AgentNetworkGuardrail struct {
 	// Checks Guardrail check parameters. Each entry has an `enabled` flag plus per-check configuration; disabled entries are inert.
@@ -2167,6 +2179,27 @@ type AgentNetworkGuardrailRequest struct {
 	Name string `json:"name"`
 }
 
+// AgentNetworkModelDiscoveryRequest defines model for AgentNetworkModelDiscoveryRequest.
+type AgentNetworkModelDiscoveryRequest struct {
+	// ApiKey Credential to query the vendor with, for a provider that has not been saved yet. Mutually exclusive with provider_id.
+	ApiKey *string `json:"api_key,omitempty"`
+
+	// CatalogProviderId Catalog provider to query (AgentNetworkCatalogProvider.id). Determines the listing endpoint, the auth header and the response shape.
+	CatalogProviderId string `json:"catalog_provider_id"`
+
+	// ProviderId Existing Agent Network provider record whose stored credential and upstream should be used. Lets the form refresh the list without the client holding the key.
+	ProviderId *string `json:"provider_id,omitempty"`
+
+	// UpstreamUrl The upstream being configured. Used to reach vendors that serve their listing from the same host as inference, and to read back the region for those whose host embeds one. Ignored when provider_id is supplied.
+	UpstreamUrl *string `json:"upstream_url,omitempty"`
+}
+
+// AgentNetworkModelDiscoveryResponse defines model for AgentNetworkModelDiscoveryResponse.
+type AgentNetworkModelDiscoveryResponse struct {
+	// Models Models the credential can reach, in the order the vendor returned them.
+	Models []AgentNetworkDiscoveredModel `json:"models"`
+}
+
 // AgentNetworkPolicy defines model for AgentNetworkPolicy.
 type AgentNetworkPolicy struct {
 	// CreatedAt Timestamp when the policy was created.
@@ -6179,6 +6212,9 @@ type PostApiAgentNetworkBudgetRulesJSONRequestBody = AgentNetworkBudgetRuleReque
 // PutApiAgentNetworkBudgetRulesRuleIdJSONRequestBody defines body for PutApiAgentNetworkBudgetRulesRuleId for application/json ContentType.
 type PutApiAgentNetworkBudgetRulesRuleIdJSONRequestBody = AgentNetworkBudgetRuleRequest
 
+// PostApiAgentNetworkCatalogProvidersModelsJSONRequestBody defines body for PostApiAgentNetworkCatalogProvidersModels for application/json ContentType.
+type PostApiAgentNetworkCatalogProvidersModelsJSONRequestBody = AgentNetworkModelDiscoveryRequest
+
 // PostApiAgentNetworkGuardrailsJSONRequestBody defines body for PostApiAgentNetworkGuardrails for application/json ContentType.
 type PostApiAgentNetworkGuardrailsJSONRequestBody = AgentNetworkGuardrailRequest