Echo n8n node

packages/n8n-nodes-echo/README.md

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+# @merit-systems/n8n-nodes-echo
+
+This is an n8n community node. It lets you use Echo API and GitHub Issues in your n8n workflows.
+
+[Installation](#installation)
+[Operations](#operations)
+[Credentials](#credentials)
+[Compatibility](#compatibility)
+[Resources](#resources)
+
+## Installation
+
+Follow the [installation guide](https://docs.n8n.io/integrations/community-nodes/installation/) in the n8n community nodes documentation.
+
+## Operations
+
+### Echo
+
+- Echo Chat Model
+  - Send a chat message to any AI model through Echo
+
+## Credentials
+
+### Echo API
+
+To use the Echo node, you can either generate an API key from the Echo App Dashboard, or connect Echo with Oauth in the node.
+
+## Compatibility
+
+Compatible with [email protected] or later
+
+## Resources
+
+- [n8n community nodes documentation](https://docs.n8n.io/integrations/#community-nodes)

packages/n8n-nodes-echo/credentials/EchoApi.credentials.ts

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+import { ICredentialType, INodeProperties } from 'n8n-workflow';
+
+export class EchoApi implements ICredentialType {
+  name = 'echoApi';
+  displayName = 'Echo API';
+  documentationUrl =
+    'https://echo.merit.systems/app/1cf92670-39b3-422f-8a9f-86ee7bee5556/keys?generate=true';
+  properties: INodeProperties[] = [
+    {
+      displayName: 'API Key',
+      name: 'apiKey',
+      type: 'string',
+      typeOptions: {
+        password: true,
+      },
+      default: '',
+      required: true,
+      description:
+        'Get your API key at https://echo.merit.systems/app/1cf92670-39b3-422f-8a9f-86ee7bee5556/keys?generate=true',
+    },
+    {
+      displayName: 'App ID',
+      name: 'appId',
+      type: 'string',
+      default: '1cf92670-39b3-422f-8a9f-86ee7bee5556',
+      required: false,
+      description: 'The Echo App ID for your application',
+    },
+    {
+      displayName: 'Base URL',
+      name: 'baseUrl',
+      type: 'string',
+      default: 'https://echo.router.merit.systems',
+      required: false,
+      description:
+        'The base URL for the Echo API (default: https://echo.router.merit.systems)',
+    },
+  ];
+}

packages/n8n-nodes-echo/credentials/EchoOAuth2Api.credentials.ts

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+import type { Icon, ICredentialType, INodeProperties } from 'n8n-workflow';
+
+export class EchoOAuth2Api implements ICredentialType {
+  name = 'echoOAuth2Api';
+
+  extends = ['oAuth2Api'];
+
+  displayName = 'Echo OAuth2 API';
+
+  icon: Icon = 'file:../icons/github.svg';
+
+  documentationUrl = 'https://echo.merit.systems/docs';
+
+  properties: INodeProperties[] = [
+    {
+      displayName: 'Grant Type',
+      name: 'grantType',
+      type: 'hidden',
+      default: 'pkce',
+    },
+    {
+      displayName: 'Echo Base URL',
+      name: 'baseUrl',
+      type: 'hidden',
+      default: 'https://echo.router.merit.systems',
+      required: false,
+      description: 'The base URL for your Echo instance',
+    },
+    {
+      displayName: 'Authorization URL',
+      name: 'authUrl',
+      type: 'hidden',
+      default: 'https://echo.merit.systems/api/oauth/authorize',
+      required: true,
+    },
+    {
+      displayName: 'Access Token URL',
+      name: 'accessTokenUrl',
+      type: 'hidden',
+      default: 'https://echo.merit.systems/api/oauth/token',
+      required: true,
+    },
+    {
+      displayName: 'Scope',
+      name: 'scope',
+      type: 'hidden',
+      default: 'llm:invoke offline_access',
+      description:
+        'OAuth2 scopes separated by spaces. Default includes LLM invocation and refresh token access.',
+    },
+    {
+      displayName: 'Client ID',
+      name: 'clientId',
+      type: 'string',
+      default: '1cf92670-39b3-422f-8a9f-86ee7bee5556',
+      required: true,
+      description: 'The Echo App ID for your application',
+    },
+    {
+      displayName: 'Client Secret',
+      name: 'clientSecret',
+      type: 'hidden',
+      typeOptions: {
+        password: true,
+      },
+      default: '',
+      required: false,
+      description:
+        'Not required for Echo OAuth2. Echo uses PKCE (Proof Key for Code Exchange) for security instead of client secrets.',
+    },
+    {
+      displayName: 'Auth URI Query Parameters',
+      name: 'authQueryParameters',
+      type: 'hidden',
+      default: '',
+    },
+    {
+      displayName: 'Authentication',
+      name: 'authentication',
+      type: 'hidden',
+      default: 'header',
+    },
+  ];
+}

packages/n8n-nodes-echo/eslint.config.mjs

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+import { config } from '@n8n/node-cli/eslint';
+
+export default config;