feat(components): add mittwald AI Hosting chat and embedding provider

packages/components/credentials/MittwaldAIHostingApi.credential.ts

@@ -0,0 +1,26 @@
+import { INodeParams, INodeCredential } from '../src/Interface'
+
+class MittwaldAIHostingApiAuth implements INodeCredential {
+    label: string
+    name: string
+    version: number
+    description: string
+    inputs: INodeParams[]
+
+    constructor() {
+        this.label = 'mittwald AI Hosting API Key'
+        this.name = 'mittwaldAIHostingApi'
+        this.version = 1.0
+        this.description = 'Create an API key for AI Hosting in mStudio'
+        this.inputs = [
+            {
+                label: 'mittwald API Key',
+                name: 'mittwaldApiKey',
+                type: 'password',
+                description: 'Create your API key in mStudio under AI Hosting (starts with sk-)'
+            }
+        ]
+    }
+}
+
+module.exports = { credClass: MittwaldAIHostingApiAuth }

packages/components/models.json

@@ -2322,6 +2322,31 @@
                     "output_cost": 0.003
                 }
             ]
+        },
+        {
+            "name": "chatMittwald",
+            "models": [
+                {
+                    "label": "gpt-oss-120b",
+                    "name": "gpt-oss-120b"
+                },
+                {
+                    "label": "Ministral-3-14B-Instruct-2512",
+                    "name": "Ministral-3-14B-Instruct-2512"
+                },
+                {
+                    "label": "Qwen3.5-122B-A10B-FP8",
+                    "name": "Qwen3.5-122B-A10B-FP8"
+                },
+                {
+                    "label": "Qwen3.6-35B-A3B-FP8",
+                    "name": "Qwen3.6-35B-A3B-FP8"
+                },
+                {
+                    "label": "Qwen3.5-0.8B",
+                    "name": "Qwen3.5-0.8B"
+                }
+            ]
         }
     ],
     "llm": [
@@ -3216,6 +3241,15 @@
                     "name": "us-west-2"
                 }
             ]
+        },
+        {
+            "name": "mittwaldEmbeddings",
+            "models": [
+                {
+                    "label": "Qwen3-Embedding-8B",
+                    "name": "Qwen3-Embedding-8B"
+                }
+            ]
         }
     ]
 }

packages/components/nodes/chatmodels/ChatMittwald/ChatMittwald.ts

@@ -0,0 +1,187 @@
+import { ChatOpenAI, ChatOpenAIFields } from '@langchain/openai'
+import { BaseCache } from '@langchain/core/caches'
+import { ICommonObject, INode, INodeData, INodeOptionsValue, INodeParams } from '../../../src/Interface'
+import { getBaseClasses, getCredentialData, getCredentialParam } from '../../../src/utils'
+import { getModels, MODEL_TYPE } from '../../../src/modelLoader'
+import { checkDenyList } from '../../../src/httpSecurity'
+
+const DEFAULT_BASE_URL = 'https://llm.aihosting.mittwald.de/v1'
+
+class ChatMittwald_ChatModels implements INode {
+    label: string
+    name: string
+    version: number
+    type: string
+    icon: string
+    category: string
+    description: string
+    baseClasses: string[]
+    credential: INodeParams
+    inputs: INodeParams[]
+
+    constructor() {
+        this.label = 'mittwald AI Hosting'
+        this.name = 'chatMittwald'
+        this.version = 1.0
+        this.type = 'ChatMittwald'
+        this.icon = 'mittwald.png'
+        this.category = 'Chat Models'
+        this.description = 'Wrapper around mittwald AI Hosting API'
+        this.baseClasses = [this.type, ...getBaseClasses(ChatOpenAI)]
+        this.credential = {
+            label: 'Connect Credential',
+            name: 'credential',
+            type: 'credential',
+            credentialNames: ['mittwaldAIHostingApi']
+        }
+        this.inputs = [
+            {
+                label: 'Cache',
+                name: 'cache',
+                type: 'BaseCache',
+                optional: true
+            },
+            {
+                label: 'Model Name',
+                name: 'modelName',
+                type: 'asyncOptions',
+                loadMethod: 'listModels',
+                default: 'gpt-oss-120b'
+            },
+            {
+                label: 'Temperature',
+                name: 'temperature',
+                type: 'number',
+                step: 0.1,
+                default: 0.9,
+                optional: true
+            },
+            {
+                label: 'Streaming',
+                name: 'streaming',
+                type: 'boolean',
+                default: true,
+                optional: true,
+                additionalParams: true
+            },
+            {
+                label: 'Max Tokens',
+                name: 'maxTokens',
+                type: 'number',
+                step: 1,
+                optional: true,
+                additionalParams: true
+            },
+            {
+                label: 'Top Probability',
+                name: 'topP',
+                type: 'number',
+                step: 0.1,
+                optional: true,
+                additionalParams: true
+            },
+            {
+                label: 'Frequency Penalty',
+                name: 'frequencyPenalty',
+                type: 'number',
+                step: 0.1,
+                optional: true,
+                additionalParams: true
+            },
+            {
+                label: 'Presence Penalty',
+                name: 'presencePenalty',
+                type: 'number',
+                step: 0.1,
+                optional: true,
+                additionalParams: true
+            },
+            {
+                label: 'Timeout',
+                name: 'timeout',
+                type: 'number',
+                step: 1,
+                optional: true,
+                additionalParams: true
+            },
+            {
+                label: 'Base Path',
+                name: 'basepath',
+                type: 'string',
+                optional: true,
+                default: DEFAULT_BASE_URL,
+                description: 'Override the default base URL for the API, e.g. for a dedicated AI Hosting endpoint',
+                additionalParams: true
+            },
+            {
+                label: 'Base Options',
+                name: 'baseOptions',
+                type: 'json',
+                optional: true,
+                description: 'Default headers to include with every request to the API.',
+                additionalParams: true
+            }
+        ]
+    }
+
+    loadMethods = {
+        async listModels(): Promise<INodeOptionsValue[]> {
+            return await getModels(MODEL_TYPE.CHAT, 'chatMittwald')
+        }
+    }
+
+    async init(nodeData: INodeData, _: string, options: ICommonObject): Promise<any> {
+        const temperature = nodeData.inputs?.temperature as string
+        const modelName = nodeData.inputs?.modelName as string
+        const maxTokens = nodeData.inputs?.maxTokens as string
+        const topP = nodeData.inputs?.topP as string
+        const frequencyPenalty = nodeData.inputs?.frequencyPenalty as string
+        const presencePenalty = nodeData.inputs?.presencePenalty as string
+        const timeout = nodeData.inputs?.timeout as string
+        const streaming = nodeData.inputs?.streaming as boolean
+        const basePath = (nodeData.inputs?.basepath as string) || DEFAULT_BASE_URL
+        const baseOptions = nodeData.inputs?.baseOptions
+        const cache = nodeData.inputs?.cache as BaseCache
+
+        const credentialData = await getCredentialData(nodeData.credential ?? '', options)
+        const mittwaldApiKey = getCredentialParam('mittwaldApiKey', credentialData, nodeData)
+
+        const obj: ChatOpenAIFields = {
+            temperature: parseFloat(temperature),
+            model: modelName,
+            apiKey: mittwaldApiKey,
+            streaming: streaming ?? true
+        }
+
+        if (maxTokens) obj.maxTokens = parseInt(maxTokens, 10)
+        if (topP) obj.topP = parseFloat(topP)
+        if (frequencyPenalty) obj.frequencyPenalty = parseFloat(frequencyPenalty)
+        if (presencePenalty) obj.presencePenalty = parseFloat(presencePenalty)
+        if (timeout) obj.timeout = parseInt(timeout, 10)
+        if (cache) obj.cache = cache
+
+        let parsedBaseOptions: any | undefined = undefined
+
+        if (baseOptions) {
+            try {
+                parsedBaseOptions = typeof baseOptions === 'object' ? baseOptions : JSON.parse(baseOptions)
+            } catch (exception) {
+                throw new Error("Invalid JSON in the ChatMittwald's BaseOptions: " + exception)
+            }
+        }
+
+        await checkDenyList(basePath)
+
+        obj.configuration = {
+            baseURL: basePath,
+            defaultHeaders: {
+                ...(parsedBaseOptions || {})
+            }
+        }
+
+        const model = new ChatOpenAI(obj)
+        return model
+    }
+}
+
+module.exports = { nodeClass: ChatMittwald_ChatModels }