Automatización de publicaciones en Instagram y Facebook usando Meta Graph API y tokens de usuario del sistema

• •Pueden requerirse credenciales de autenticación para la API de destino

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        "url": "https://graph.facebook.com/v19.0/<YOUR PAGE ID HERE>/media",
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        "content": "**How to Generate a Facebook Short-Lived Access Token for Instagram + Facebook Page Posting**\n\n### What You Need\n\n* A **Facebook account**\n* A **Facebook Page** (must be linked to an Instagram Business account if you plan to post to IG)\n* Access to [Meta for Developers](https://developers.facebook.com/)\n\n---\nStep-by-Step: How to Generate Your Short-Lived Token\n\n#### 1. Go to Meta for Developers\n\n* Visit: [https://developers.facebook.com/apps](https://developers.facebook.com/apps)\n* Log in with your Facebook credentials\n\n#### 2. Create a New App\n\n* Click the blue **Create App** button\n* Choose **Other** as the app type\n* On the next screen, select **Business**\n* Enter an app name and contact email, then click **Create App**\n\n#### 3. Open the App Dashboard\n\n* After creation, you’ll be redirected to the app’s dashboard\n* This is where you’ll manage products, permissions, and tokens\n\n#### 4. Add Products\n\n* In the left sidebar, scroll down to **Add Product**\n* Click **Set Up** on both:\n\n  * **Instagram Graph API**\n  * **Facebook Graph API** (If missing it is automatically setup when you create the app) \n\n>  If you do not see the \"Add Product\" section, your app may already be locked to a specific template or be in Live mode. You can still continue to the Graph API Explorer.\n\n#### 5. Go to the Graph API Explorer\n\n* Visit: [https://developers.facebook.com/tools/explorer/](https://developers.facebook.com/tools/explorer/)\n* In the top-right dropdown, select your app\n* Under \"User or Page\", keep **User Token** selected\n\n#### 6. Generate a User Access Token\n\n* Click **Get Token** > **Get User Access Token**\n* A permissions dialog will appear\n\n#### 7. Select the Required Permissions (Scopes)\n\nCheck the following boxes:\n\n* `pages_show_list`\n* `pages_read_engagement`\n* `pages_manage_posts`\n* `instagram_basic`\n* `instagram_content_publish`\n\n> These allow you to post to both Facebook Pages and Instagram accounts. Some may require approval for production use.\n\n#### 8. Authenticate and Authorize\n\n* A pop-up will prompt you to log into Facebook and approve the app\n* Be sure to authorize access to your Facebook Page and linked Instagram account\n\n#### 9. Copy the Short-Lived Token\n\n* After successful login, the Graph API Explorer will refresh\n* Your new **short-lived token** will appear in the top bar\n* **Copy it immediately** — this token is valid for 1–2 hours\n\n"
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        "content": "Facebook will only give you a \"Long Live Token\" if you are verified. If you are testing or not verified you can use the below method.\nThe initial token will only last a few hours, you can use the below to get the one that last for 2 months. Once you have the 2 month token you can put it in here and set the schedule to run every 30-60 days which will refresh and be saved in the static data.\n\n\n##Please note static Data does not run on a test, you can use a form submitted node to activate the flow.\n##Please note this is just a work around for testing and not practical for permanent use. "
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              "value": "https://images.pexels.com/photos/5475816/pexels-photo-5475816.jpeg?auto=compress&cs=tinysrgb&fit=crop&h=627&w=1200"
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            {
              "name": "caption",
              "value": "This is the caption for the post"
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        "content": " How to Create a Permanent System User Token (Recommended)\n\nThis token doesn’t expire and is best for automation use cases\n\n1. Verify Your Business\n\nGo to https://business.facebook.com/settings/info\n\nComplete business verification under Business Info tab\n\nSubmit your business documents and wait for approval (Sometimes you just have to submit an EIN/Tax-ID.\n\nApproval can take 1-5 Business days\n\nOnce Approved do the following.\n\n2. Create a System User\n\nIn Business Settings\n\nGo to System Users > Click Add\n\nAssign a name (e.g. n8n-bot) and select Admin access\n\n3. Assign Assets to System User\n\nIn the same System User view, assign:\n\nYour Facebook Page (with Full Control)\n\nYour Instagram Account (linked via Page)\n\nYour App\n\n4. Generate a Token\n\nClick Generate Token\n\nSelect your App\n\nSet expiration to Never\n\nGrant these permissions:\n\npages_show_list\n\npages_read_engagement\n\npages_manage_posts\n\ninstagram_basic\n\ninstagram_content_publish\n\n-If instagram_content_publish is not visible, you may need to request it via App Review under the App dashboard.\n\n5. Use This Token\n\nStore it in the Facebook Graph API\n\n"
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        "jsCode": "const page = $json.data.find(p => p.id === '266271423823110');\nreturn [{ json: { access_token: page.access_token } }];\n"
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