---
title: Stripe Webhooks & Payment Automation
type: article
created: '2026-04-05'
updated: '2026-04-05'
source_docs:
- raw/2026-01-08-call-w-adam-rigdon-wi-masonic-foundation-112734443.md
tags:
- integrations
- stripe
- webhooks
- automation
- payments
layer: 2
client_source: null
industry_context: null
transferable: true
---

# Stripe Webhooks & Payment Automation

Stripe webhooks provide a reliable mechanism for triggering downstream automation the moment a payment is confirmed. Rather than polling for payment status or relying on manual follow-up, a webhook listener receives an event from Stripe and fires off whatever logic needs to happen next — emails, database writes, fulfillment triggers, etc.

## Core Pattern

The general pattern is:

1. **Customer completes payment** via a Stripe payment link, checkout session, or embedded form
2. **Stripe emits a webhook event** (e.g., `payment_intent.succeeded`, `checkout.session.completed`) to a configured endpoint
3. **Your endpoint receives the event**, verifies the Stripe signature, and executes the appropriate workflow steps

This decouples payment confirmation from fulfillment logic, making each step independently reliable and auditable.

## Common Trigger Events

| Event | When to Use |
|---|---|
| `payment_intent.succeeded` | Payment fully captured; safe to fulfill |
| `checkout.session.completed` | Checkout flow finished (covers both card and ACH) |
| `charge.succeeded` | Lower-level charge confirmation |
| `invoice.paid` | Subscription or invoice-based billing |

For one-time grant or purchase flows, `checkout.session.completed` or `payment_intent.succeeded` are typically the right hooks.

## ACH / Bank Transfer Timing

ACH payments introduce a delay between initiation and confirmation. Stripe reports ACH transfers as taking **2–14 business days** to settle. This means:

- Do **not** trigger fulfillment on ACH payment *initiation* — wait for the `payment_intent.succeeded` event
- Consider sending an "application received, payment pending" confirmation immediately, then a separate "payment confirmed, fulfillment in progress" message once the webhook fires
- Design fulfillment workflows to be idempotent — Stripe may retry webhook delivery if your endpoint doesn't respond with a `2xx`

## Practical Workflow: Grant or Purchase Fulfillment

A pattern that works well for organizations managing restricted-access purchasing (e.g., member-only grant programs):

```
Application submitted
  → Eligibility check (API call to internal database)
  → Approval decision
  → Stripe payment link sent to applicant
  → Applicant pays
  → Stripe webhook fires on payment_intent.succeeded
      → Email to fulfillment contact (e.g., vendor/shipper) with order details
      → Email to finance staff for recordkeeping
      → Email to applicant confirming completion
      → Write-back to internal database (e.g., update balance/status)
```

This pattern was directly discussed for [[clients/wi-masonic-foundation/_index|WI Masonic Foundation]]'s matching grant program, where payment confirmation would trigger emails to Rick at Fire Expression Solutions (for physical item shipment), Erica and Christina (for financial tracking), and the applying lodge.

See: [[meetings/2026-04-05-wmf-grant-automation-discovery|WMF Grant Automation Discovery Call]]

## Stripe Payment Links

Stripe Payment Links are a lightweight way to collect payment without building a full checkout UI. They work well when:

- The payment amount is fixed (e.g., a specific grant item at a fixed price)
- You want to send a link via email after an approval step
- You don't need a full storefront

Limitations:
- Less flexible for variable amounts (though Stripe does support customer-specified quantities)
- No native way to pass arbitrary metadata through the link without custom checkout sessions

For more complex flows — such as dynamically setting the amount based on an eligibility check — a programmatically created **Checkout Session** gives more control and allows metadata to be attached to the payment for use in the webhook handler.

## Integration with Other Systems

Webhooks become most powerful when chained to other system APIs:

- **Ninox API:** After payment confirmation, write back to a Ninox database to update a lodge's grant balance or mark an application as fulfilled. See [[knowledge/integrations/ninox-api|Ninox API Integration]].
- **Email (SMTP / transactional):** Fire templated emails to multiple recipients with order/fulfillment details extracted from the Stripe event payload.
- **CRM / accounting systems:** Post payment records automatically to avoid manual data entry.

## Security Considerations

- Always **verify the Stripe webhook signature** using the signing secret provided in the Stripe dashboard. Do not process events from unverified sources.
- Respond with `200 OK` immediately upon receipt; do heavy processing asynchronously to avoid timeout-related retries.
- Log all incoming webhook events before processing so you have a record if something goes wrong downstream.

## Related

- [[knowledge/integrations/ninox-api|Ninox API Integration]]
- [[clients/wi-masonic-foundation/_index|WI Masonic Foundation]]
- [[meetings/2026-04-05-wmf-grant-automation-discovery|WMF Grant Automation Discovery Call]]