{ "id": "wnEDtKnbAvH6Nwzl", "meta": { "instanceId": "43d81439287e5f6ff3c1139ba318c0ce671e88998b7b398b9665f22852a0fbb0", "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 ], "webhookId": "7c277748-d5fe-46f1-a33b-771acf6a7fe5", "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 \" × \" and taking the text before the first \"(\"; trim.\n Example: \"1 × 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->€, gbp->£; 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 120–180 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’s 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": { "id": "credential-id", "name": "openAiApi Credential" } }, "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": "={{ $json.email_body }}" }, { "name": "MessageStream", "value": "n8n_demo" } ] }, "headerParameters": { "parameters": [ { "name": "Accept", "value": "application/json" }, { "name": "Content-Type", "value": "application/json" } ] }, "nodeCredentialType": "postmarkApi" }, "credentials": { "postmarkApi": { "id": "credential-id", "name": "postmarkApi Credential" } }, "typeVersion": 4.2 }, { "id": "6dea1a66-716b-4420-a8b0-6ac8f8a25ce4", "name": "Code in JavaScript1", "type": "n8n-nodes-base.code", "position": [ 1376, -128 ], "parameters": { "jsCode": "// Use this if you only ever have one incoming item.\nfunction extractJsonString(s) {\n if (typeof s !== 'string') return '';\n let t = s.trim();\n t = t.replace(/^```(?:json)?\\n?/, '').replace(/```$/, '').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 — guards the flow so you only email on the exact scenario. And ensures one-off invoices or manual-collection accounts don’t 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’s 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, "pinData": { "Webhook": [ { "json": { "body": { "id": "evt_1S7vuYG9IeYtcQnK2DF8NBzW", "data": { "object": { "id": "in_1S7dVIG9IeYtcQnK4eQ0nbt7", "tax": null, "paid": false, "lines": { "url": "/v1/invoices/in_1S7dVIG9IeYtcQnK4eQ0nbt7/lines", "data": [ { "id": "il_1S7dVIG9IeYtcQnKlxmlPTDq", "plan": { "id": "price_1S569mG9IeYtcQnKwvvMaDzA", "meter": null, "active": true, "amount": 200, "object": "plan", "created": 1757342098, "product": "prod_T18QtO2dT4KtKv", "currency": "usd", "interval": "day", "livemode": true, "metadata": {}, "nickname": null, "tiers_mode": null, "usage_type": "licensed", "amount_decimal": "200", "billing_scheme": "per_unit", "interval_count": 1, "aggregate_usage": null, "transform_usage": null, "trial_period_days": null }, "type": "subscription", "price": { "id": "price_1S569mG9IeYtcQnKwvvMaDzA", "type": "recurring", "active": true, "object": "price", "created": 1757342098, "product": "prod_T18QtO2dT4KtKv", "currency": "usd", "livemode": true, "metadata": {}, "nickname": null, "recurring": { "meter": null, "interval": "day", "usage_type": "licensed", "interval_count": 1, "aggregate_usage": null, "trial_period_days": null }, "lookup_key": null, "tiers_mode": null, "unit_amount": 200, "tax_behavior": "exclusive", "billing_scheme": "per_unit", "custom_unit_amount": null, "transform_quantity": null, "unit_amount_decimal": "200" }, "taxes": [], "amount": 200, "object": "line_item", "parent": { "type": "subscription_item_details", "invoice_item_details": null, "subscription_item_details": { "proration": false, "invoice_item": null, "subscription": "sub_1S569yG9IeYtcQnKnk8d1hQm", "proration_details": { "credited_items": null }, "subscription_item": "si_T18QDa3GjF9Tcj" } }, "period": { "end": 1758033309, "start": 1757946909 }, "invoice": "in_1S7dVIG9IeYtcQnK4eQ0nbt7", "pricing": { "type": "price_details", "price_details": { "price": "price_1S569mG9IeYtcQnKwvvMaDzA", "product": "prod_T18QtO2dT4KtKv" }, "unit_amount_decimal": "200" }, "currency": "usd", "livemode": true, "metadata": {}, "quantity": 1, "discounts": [], "proration": false, "tax_rates": [], "description": "1 × daily_test_2 (at $2.00 / day)", "tax_amounts": [], "discountable": true, "subscription": "sub_1S569yG9IeYtcQnKnk8d1hQm", "discount_amounts": [], "proration_details": { "credited_items": null }, "subscription_item": "si_T18QDa3GjF9Tcj", "amount_excluding_tax": 200, "pretax_credit_amounts": [], "unit_amount_excluding_tax": "200" } ], "object": "list", "has_more": false, "total_count": 1 }, "quote": null, "total": 200, "charge": "ch_3S7eRmG9IeYtcQnK0bq1Md8I", "footer": null, "issuer": { "type": "self" }, "number": "4CDF8971-0014", "object": "invoice", "parent": { "type": "subscription_details", "quote_details": null, "subscription_details": { "metadata": {}, "subscription": "sub_1S569yG9IeYtcQnKnk8d1hQm" } }, "status": "open", "created": 1757946940, "currency": "usd", "customer": "cus_R4Ckw7NvfHF8NZ", "discount": null, "due_date": null, "livemode": true, "metadata": {}, "subtotal": 200, "attempted": true, "discounts": [], "rendering": null, "amount_due": 200, "period_end": 1757946909, "test_clock": null, "amount_paid": 0, "application": null, "description": null, "invoice_pdf": "https://pay.stripe.com/invoice/acct_1L8kxHG9IeYtcQnK/live_YWNjdF8xTDhreEhHOUllWXRjUW5LLF9UM2wxc2JNekVsVGNRS3JOb1VJb3VDdUNIMWJ1UkRFLDE0ODU1ODQ5OA0200p5h7LflI/pdf?s=ap", "total_taxes": [], "account_name": "YourCompany", "auto_advance": true, "effective_at": 1757950564, "from_invoice": null, "on_behalf_of": null, "period_start": 1757860509, "subscription": "sub_1S569yG9IeYtcQnKnk8d1hQm", "attempt_count": 1, "automatic_tax": { "status": null, "enabled": false, "provider": null, "liability": null, "disabled_reason": null }, "custom_fields": null, "customer_name": "Test User", "shipping_cost": null, "transfer_data": null, "billing_reason": "subscription_cycle", "customer_email": "customer@example.com", "customer_phone": null, "default_source": null, "ending_balance": 0, "payment_intent": "pi_3S7eRmG9IeYtcQnK0w1Kf2Q0", "receipt_number": null, "account_country": "US", "account_tax_ids": null, "amount_overpaid": 0, "amount_shipping": 0, "latest_revision": null, "amount_remaining": 200, "customer_address": { "city": "", "line1": "", "line2": "", "state": "", "country": "US", "postal_code": "" }, "customer_tax_ids": [], "paid_out_of_band": false, "payment_settings": { "default_mandate": null, "payment_method_types": null, "payment_method_options": null }, "shipping_details": null, "starting_balance": 0, "collection_method": "charge_automatically", "customer_shipping": { "name": "Sample Customer", "phone": "", "address": { "city": "", "line1": "", "line2": "", "state": "", "country": "US", "postal_code": "" } }, "default_tax_rates": [], "total_tax_amounts": [], "hosted_invoice_url": "https://invoice.stripe.com/i/acct_1L8kxHG9IeYtcQnK/live_YWNjdF8xTDhreEhHOUllWXRjUW5LLF9UM2wxc2JNekVsVGNRS3JOb1VJb3VDdUNIMWJ1UkRFLDE0ODU1ODQ5OA0200p5h7LflI?s=ap", "status_transitions": { "paid_at": null, "voided_at": null, "finalized_at": 1757950564, "marked_uncollectible_at": null }, "customer_tax_exempt": "exempt", "total_excluding_tax": 200, "next_payment_attempt": 1758116168, "statement_descriptor": null, "subscription_details": { "metadata": {} }, "webhooks_delivered_at": 1757946942, "application_fee_amount": null, "default_payment_method": null, "subtotal_excluding_tax": 200, "total_discount_amounts": [], "last_finalization_error": null, "automatically_finalizes_at": null, "total_pretax_credit_amounts": [], "pre_payment_credit_notes_amount": 0, "post_payment_credit_notes_amount": 0 } }, "type": "invoice.payment_failed", "object": "event", "created": 1758017697, "request": { "id": "req_LM2p7ZwA6mPHf0", "idempotency_key": "7139e099-317e-4632-9287-1d9e78e73134" }, "livemode": true, "api_version": "2025-02-24.acacia", "pending_webhooks": 1 }, "query": {}, "params": {}, "headers": { "host": "YOUR-N8N-DOMAIN", "accept": "*/*", "cf-ray": "9809548444f914b7-TLV", "cdn-loop": "cloudflare; loops=1; subreqs=1", "cf-ew-via": "15", "cf-worker": "n8n.cloud", "x-real-ip": "2.54.172.215", "cf-visitor": "{\"scheme\":\"https\"}", "user-agent": "PostmanRuntime/7.44.0", "cf-ipcountry": "IL", "content-type": "application/json", "x-is-trusted": "yes", "cache-control": "no-cache", "postman-token": "aa7a54f7-8199-4073-8e3d-cbcc64a959da", "content-length": "8166", "accept-encoding": "gzip, br", "x-forwarded-for": "2.54.172.215, 172.70.153.162", "cf-connecting-ip": "2.54.172.215", "x-forwarded-host": "YOUR-N8N-DOMAIN", "x-forwarded-port": "443", "x-forwarded-proto": "https", "x-forwarded-server": "traefik-prod-users-gwc-52-6c4f4684d5-tchs5" }, "webhookUrl": "https://YOUR-N8N-DOMAIN/webhook-test/7c277748-d5fe-46f1-a33b-771acf6a7fe5", "executionMode": "test" } } ] }, "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 } ] ] } } }