{ "id": "wnEDtKnbAvH6Nwzl", "meta": { "templateCredsSetupCompleted": true }, "name": "stripe-failed-payment-recovery-ai-emails-by-flycode", "tags": [], "nodes": [ { "id": "d5c159bf-cf8b-4247-b8c2-e2ec52325c8c", "name": "Webhook", "type": "n8n-nodes-base.webhook", "position": [ 0, 0 ], "parameters": { "path": "7c277748-d5fe-46f1-a33b-771acf6a7fe5", "options": {}, "httpMethod": "POST" }, "typeVersion": 2.1 }, { "id": "3736d60f-82a0-4012-b703-22e895abcbac", "name": "Code in JavaScript", "type": "n8n-nodes-base.code", "position": [ 416, 0 ], "parameters": { "jsCode": "// Process all incoming items from Webhook (Run Once mode)\nconst items = $input.all();\n\nreturn items.map(({ json }) => {\n const obj = json?.body?.data?.object ?? {};\n\n // Extract and split name on the FIRST space\n const fullName = String(obj.customer_name ?? \"\").trim().replace(/\\s+/g, \" \");\n const spaceIdx = fullName.indexOf(\" \");\n const firstName = spaceIdx === -1 ? fullName : fullName.slice(0, spaceIdx);\n const lastName = spaceIdx === -1 ? \"\" : fullName.slice(spaceIdx + 1);\n\n // Other fields\n const currency = obj.currency ?? \"\";\n const customer_email = obj.customer_email ?? \"\";\n const hosted_invoice_url = obj.hosted_invoice_url ?? \"\";\n const invoice_number = obj.number ?? \"\";\n const invoice_amount = obj.total != null ? obj.total / 100 : null; // cents -> float\n const type = json?.body?.type ?? \"\";\n const billing_reason = obj.billing_reason ?? \"\";\n const collection = obj.collection_method ?? \"\";\n const account_name = obj.account_name ?? \"\";\n\n // Description: prefer top-level; fallback to first line item\n const lineItemDesc =\n Array.isArray(obj?.lines?.data) && obj.lines.data.length > 0\n ? obj.lines.data[0]?.description ?? \"\"\n : \"\";\n\n const description = obj.description ?? lineItemDesc ?? \"\";\n\n return {\n json: {\n firstName,\n lastName,\n currency,\n customer_email,\n hosted_invoice_url,\n invoice_number,\n invoice_amount,\n type,\n billing_reason,\n collection,\n description,\n account_name,\n },\n };\n});" }, "typeVersion": 2 }, { "id": "aa432ab0-badb-4f64-a2c0-e8f6d64dc207", "name": "If", "type": "n8n-nodes-base.if", "position": [ 672, 0 ], "parameters": { "options": {}, "conditions": { "options": { "version": 2, "leftValue": "", "caseSensitive": true, "typeValidation": "strict" }, "combinator": "and", "conditions": [ { "id": "4b276567-deec-472c-b5a9-f3c9ff36a627", "operator": { "name": "filter.operator.equals", "type": "string", "operation": "equals" }, "leftValue": "={{ $json.type }}", "rightValue": "invoice.payment_failed" }, { "id": "47631a70-18f9-4c67-a096-3f90b25c99c6", "operator": { "name": "filter.operator.equals", "type": "string", "operation": "equals" }, "leftValue": "={{ $json.billing_reason }}", "rightValue": "subscription_cycle" }, { "id": "9d8725bd-25d0-42bf-91e6-b093ace80808", "operator": { "name": "filter.operator.equals", "type": "string", "operation": "equals" }, "leftValue": "={{ $json.collection }}", "rightValue": "charge_automatically" } ] } }, "typeVersion": 2.2 }, { "id": "4356bb04-49c4-4343-a2dd-f48dc2f87669", "name": "AI Agent", "type": "@n8n/n8n-nodes-langchain.agent", "position": [ 1024, -128 ], "parameters": { "text": "=You are writing a short, friendly, and urgent FAILED PAYMENT email.\n\nVARIABLES (may be missing):\n- firstName: {{ $json.firstName }}\n- lastName: {{ $json.lastName }}\n- account_name: {{ $json.account_name }}\n- customer_email: {{ $json.customer_email }}\n- hosted_invoice_url: {{ $json.hosted_invoice_url }}\n- invoice_number: {{ $json.invoice_number }}\n- invoice_amount: {{ $json.invoice_amount }}\n- currency: {{ $json.currency }}\n- description: {{ $json.description }}\n- type: {{ $json.type }}\n- billing_reason: {{ $json.billing_reason }}\n- collection: {{ $json.collection }}\n\nGOAL:\nPolitely but clearly convey urgency to pay the failed invoice to avoid interruption/cancellation.\n\nSUBSCRIPTION NAME:\n- If \"description\" exists, extract the plan name by removing any leading \" \u00d7 \" and taking the text before the first \"(\"; trim.\n Example: \"1 \u00d7 daily_test_2 (at $2.00 / day)\" -> \"daily_test_2\".\n- Otherwise use \"{{ $json.account_name }} subscription\".\n\nAMOUNT FORMATTING:\n- Two decimals.\n- Currency symbol map: usd->$, eur->\u20ac, gbp->\u00a3; otherwise render as \" \" (e.g., 12.00 AUD).\n\nEMAIL BODY REQUIREMENTS (HTML):\n- Produce valid, minimal HTML **snippet** (no or tags). Use ASCII only (no smart quotes).\n- Structure:\n - Use

for paragraphs; use
only for small line breaks inside a paragraph (e.g., in the signature).\n - Include: greeting, the subscription/plan name, the invoice number, the formatted amount due, and the consequence of non-payment (interruption/cancellation).\n - Include ONE clear call-to-action as a **hyperlink button** to {{ $json.hosted_invoice_url }}:\n \n Pay invoice\n \n Do not paste the raw URL in the body; use only the hyperlink above.\n - Close with a polite reassurance and a **signature block** like:\n

Thank you,
{{ $json.account_name }} Billing Team

\n If account_name is missing, render \"Billing Team\" only.\n- Tone: polite, reassuring, action-oriented, concise (about 120\u2013180 words).\n\nFALLBACKS:\n- If any variable is missing, use an empty string.\n- If the link is missing, set href=\"#\" but still render the button.\n\nOUTPUT FORMAT (STRICT):\n- Output ONE valid JSON object ONLY (no code fences, no markdown, no extra keys, no arrays).\n- Start with \"{\" and end with \"}\".\n- EXACT keys with string values:\n {\n \"to_email\": \"...\",\n \"email_subject\": \"...\",\n \"email_body\": \"...\" // HTML string; do not escape tags; normal JSON string quoting is OK\n }\n- \"to_email\" MUST be {{ $json.customer_email }} if present, else \"\".\n- Subject pattern: \"Action required: Payment failed for (Invoice )\".\n- Greeting rule: \"Hi {{ $json.firstName }},\" else \"Hi there,\".", "options": { "systemMessage": "You are the company\u2019s Billing & Payments Manager. Write a warm, personal one-to-one email to the customer about their field subscription invoice." }, "promptType": "define" }, "typeVersion": 2.2 }, { "id": "154b2939-f614-4023-9d4b-16e3b47bd525", "name": "OpenAI Chat Model", "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi", "position": [ 1024, 64 ], "parameters": { "model": { "__rl": true, "mode": "list", "value": "gpt-4.1-mini" }, "options": { "responseFormat": "json_object" } }, "credentials": { "openAiApi": { "name": "" } }, "typeVersion": 1.2 }, { "id": "f053f493-2898-41d4-bec3-b3fe21bc53a6", "name": "HTTP Request1", "type": "n8n-nodes-base.httpRequest", "position": [ 1584, -128 ], "parameters": { "url": "https://api.postmarkapp.com/email", "method": "POST", "options": {}, "sendBody": true, "sendHeaders": true, "authentication": "predefinedCredentialType", "bodyParameters": { "parameters": [ { "name": "From", "value": "{{POSTMARK_FROM_EMAIL}}" }, { "name": "To", "value": "={{ $json.to_email }}" }, { "name": "Subject", "value": "={{ $json.email_subject }}" }, { "name": "HtmlBody", "value": "={{ $json.email_body }}" }, { "name": "MessageStream", "value": "n8n_demo" } ] }, "headerParameters": { "parameters": [ { "name": "Accept", "value": "application/json" }, { "name": "Content-Type", "value": "application/json" } ] }, "nodeCredentialType": "postmarkApi" }, "credentials": { "postmarkApi": { "name": "" } }, "typeVersion": 4.2 }, { "id": "6dea1a66-716b-4420-a8b0-6ac8f8a25ce4", "name": "Code in JavaScript1", "type": "n8n-nodes-base.code", "position": [ 1376, -128 ], "parameters": { "jsCode": "// Use this if you only ever have one incoming item.\nfunction extractJsonString(s) {\n if (typeof s !== 'string') return '';\n let t = s.trim();\n t = t.replace(/^```(?:json)?\\n?/, '').replace(/```$/, '').trim();\n if (t.startsWith('{') && t.endsWith('}')) return t;\n const m = t.match(/{[\\s\\S]*}/);\n return m ? m[0] : '';\n}\n\nconst raw = $json?.text ?? $json?.output ?? '';\nconst jsonStr = extractJsonString(raw);\nif (!jsonStr) {\n throw new Error('Could not find a JSON object in the model response.');\n}\nconst obj = JSON.parse(jsonStr);\nreturn [{ json: obj }];\n" }, "typeVersion": 2 }, { "id": "810cbecc-938d-4635-b73b-0c4624a14503", "name": "Sticky Note", "type": "n8n-nodes-base.stickyNote", "position": [ 336, -400 ], "parameters": { "width": 304, "height": 368, "content": "## Code in JavaScript1\nextracts fields from `body.data.object` and maps:\n- firstName\n- lastName (split on first space)\n- currency\n- customer_email,\n- hosted_invoice_url\n- invoice_number\n- invoice_amount (divide total by 100)\n- type\n- billing_reason\n- collection\n- description (falls back to first line item)\n- account_name" }, "typeVersion": 1 }, { "id": "a992aba3-badc-4f9a-8dcd-acd159d99934", "name": "Filter", "type": "n8n-nodes-base.filter", "position": [ 208, 0 ], "parameters": { "options": {}, "conditions": { "options": { "version": 2, "leftValue": "", "caseSensitive": true, "typeValidation": "strict" }, "combinator": "and", "conditions": [ { "id": "ee074e73-33fe-4291-baa5-7bf601bfa74f", "operator": { "name": "filter.operator.equals", "type": "string", "operation": "equals" }, "leftValue": "={{ $json.body.data.object.object }}", "rightValue": "invoice" }, { "id": "59ae193e-bc21-4e4a-a2ca-f1e332652cf5", "operator": { "name": "filter.operator.equals", "type": "string", "operation": "equals" }, "leftValue": "={{ $json.body.object }}", "rightValue": "event" } ] } }, "typeVersion": 2.2 }, { "id": "6b6bef23-3e45-4f81-8e76-9c7d98354687", "name": "Sticky Note1", "type": "n8n-nodes-base.stickyNote", "position": [ 144, 128 ], "parameters": { "height": 176, "content": "## Filter non-stripe webhooks\nIf you might receive non-Stripe posts on the Webhook, add a quick guard in the first Code node to bail if." }, "typeVersion": 1 }, { "id": "0e2b8c1e-c4f3-4a35-b8f4-b6272981fa83", "name": "Sticky Note2", "type": "n8n-nodes-base.stickyNote", "position": [ 576, 128 ], "parameters": { "width": 288, "height": 176, "content": "## Filter non recurring subscription invoices \nIf \u2014 guards the flow so you only email on the exact scenario. And ensures one-off invoices or manual-collection accounts don\u2019t get this email." }, "typeVersion": 1 }, { "id": "fd8c7a80-ea7f-4f3f-9e69-9f70f6637c22", "name": "Sticky Note3", "type": "n8n-nodes-base.stickyNote", "position": [ -96, -192 ], "parameters": { "width": 288, "height": 176, "content": "## Webhook\nReceives Stripe events.\n\n*Path is currently a mock UUID; Don't forget to replace it with the path generated by n8n.*" }, "typeVersion": 1 }, { "id": "32d67c3f-e485-4bac-93a4-3425d9f3891b", "name": "Sticky Note5", "type": "n8n-nodes-base.stickyNote", "position": [ 1280, 32 ], "parameters": { "width": 288, "height": 144, "content": "## Code in JavaScript2\nParses the model\u2019s JSON string returned by AI Agent to a real JSON object (`to_email`, `email_subject`, `email_body`)." }, "typeVersion": 1 }, { "id": "d07fa2e0-ba3e-477c-92c0-e7b8ab20dba3", "name": "Sticky Note6", "type": "n8n-nodes-base.stickyNote", "position": [ 944, -272 ], "parameters": { "width": 384, "height": 128, "content": "## AI Agent + OpenAI Chat Model\nGenerates the email JSON from Stripe invoice data using the prompt. Returns a single JSON object with keys: `to_email`, `email_subject`, `email_body`.\n\n*Don't forget replace the sender (From) and attach your own Postmark credentials at import time.*" }, "typeVersion": 1 }, { "id": "0ac3ec94-8cad-4c6a-814f-ebf1b70ffb23", "name": "Sticky Note7", "type": "n8n-nodes-base.stickyNote", "position": [ 1456, -320 ], "parameters": { "width": 368, "height": 176, "content": "## HTTP Request to POSTMARK\nSends the email using, `From`, `To`, `Subject`, `HtmlBody`, and `MessageStream`. \n\n*Don't forget replace the sender (From) and attach your own Postmark credentials at import time.*" }, "typeVersion": 1 } ], "active": true, "settings": { "executionOrder": "v1" }, "versionId": "749b1732-6fdd-4a5f-927c-46a8dd628b1a", "connections": { "If": { "main": [ [ { "node": "AI Agent", "type": "main", "index": 0 } ], [] ] }, "Filter": { "main": [ [ { "node": "Code in JavaScript", "type": "main", "index": 0 } ] ] }, "Webhook": { "main": [ [ { "node": "Filter", "type": "main", "index": 0 } ] ] }, "AI Agent": { "main": [ [ { "node": "Code in JavaScript1", "type": "main", "index": 0 } ] ] }, "OpenAI Chat Model": { "ai_languageModel": [ [ { "node": "AI Agent", "type": "ai_languageModel", "index": 0 } ] ] }, "Code in JavaScript": { "main": [ [ { "node": "If", "type": "main", "index": 0 } ] ] }, "Code in JavaScript1": { "main": [ [ { "node": "HTTP Request1", "type": "main", "index": 0 } ] ] } } }