Shopify order webhooks

Not specified by the original author.

TL;DR

Confirm your webhook endpoint URL is registered in the Finix dashboard and points at your store.

Fix

1. Confirm your webhook endpoint URL is registered in the Finix dashboard and points at your store. Expected: you can confirm this matches your situation.

When to use

• You are setting up or using this Finix orders stuck pending feature.
• The symptom matches: check webhook URL, credentials, and public reachability.

When NOT to use

• Unrelated Finix orders stuck pending issues (different feature, different failure).
• You need general documentation for the tool; check the official docs instead.

Compatibility

Reported against Finix orders stuck pending. Source: https://github.com/j2commerce/documentation/blob/HEAD/website/docs-v6/payment-methods/payment_finix.md.

Variant phrasings

check webhook URL, credentials, and public reachability

Why it happens

Stuck pending status usually means Finix webhooks are not reaching your server.

Edge cases

• If your error message differs even slightly, this is probably a different issue; search the exact text.
• If the fix does not help, capture the full error output and check the source link for updates.

Source

https://github.com/j2commerce/documentation/blob/HEAD/website/docs-v6/payment-methods/payment_finix.md

Source: Stuck pending status usually means Finix webhooks are not reaching your server.

Verified resolution: [Finix integration troubleshooting]: confirm your webhook endpoint URL is registered in the Finix dashboard and points at your store. Verify the webhook username, webhook password, and webhook signing key match the dashboard values exactly. Your store URL must be publicly reachable over HTTPS: Finix cannot deliver webhooks to YOUR_HOST or a private network. In sandbox, use Finix test cards (Visa 4895142232120006, MC 5200828282828210, Amex 370000000000002) to reproduce end to end.

Source URL: https://github.com/j2commerce/documentation/blob/HEAD/website/docs-v6/payment-methods/payment_finix.md

Not specified by the original author.

Fix Shopify webhook HMAC validation failing

TL;DR

HMAC validation fails when you compute the digest over the wrong bytes or with the wrong secret. Use the raw request body and the app's webhook secret, compute HMAC-SHA256, and compare with the X-Shopify-Hmac-Sha256 header using a constant-time compare. Parsed JSON bodies break the digest.

The error

Shopify webhook handler error
HMAC validation failed: computed digest does not match X-Shopify-Hmac-Sha256

Use this skill

Agent? Search Vectle for this error:

curl -s "https://vectle.com/api/v1/search?q=shopify webhook hmac validation failed"

Fix it

Step 1: Read the raw body

Ensure your route receives the raw bytes. Do not let JSON middleware parse it first on the webhook path.

Expected: Your handler sees the untouched payload bytes.

Step 2: Get the correct webhook secret

From your Shopify app settings, copy the webhook secret (the API secret key for the app).

Expected: You have the current secret value.

Step 3: Compute HMAC-SHA256 over the raw body

Use your language's HMAC with SHA256, keyed by the secret, over the raw body bytes, then base64-encode it.

Expected: The computed digest is a base64 string.

Step 4: Compare with the header in constant time

Compare your digest with the X-Shopify-Hmac-Sha256 header using a timing-safe compare.

Expected: They match for genuine Shopify webhooks.

Step 5: Test with a real webhook

Trigger a test webhook from the Shopify admin.

Expected: Validation passes and the event processes.

When this applies

• Shopify webhooks fail HMAC validation
• Webhooks worked and broke after a framework change
• You are building the webhook receiver for the first time

When it doesn't

• No webhooks arrive at all (check the subscription and URL)
• Validation passes but processing fails (check your handler)
• You rotated the app secret (update the stored secret too)

Compatibility

Shopify webhooks. Any stack; HMAC-SHA256 is the algorithm.

Variant phrasings

shopify hmac sha256 mismatch webhook

Same failure. Raw bytes plus correct secret is the whole fix.

x-shopify-hmac-sha256 invalid

An invalid header value with correct code usually means the secret is stale after rotation.

shopify webhook signature failed after deploy

Deploys that add global JSON parsing middleware are the classic regression.

Why it happens

Shopify signs the raw payload bytes with your app secret. Anything that changes the bytes, parsing to JSON and re-encoding, trimming whitespace, or a wrong secret, produces a different digest. The comparison is exact by design.

Edge cases

• Some proxies normalize request bodies; terminate TLS at your app or verify behind the proxy carefully
• Test webhooks from the admin use the same signing; they are safe to validate against
• Log the topic and a hash of the payload on failure, never the full payload with customer data

If it still fails

• Reproduce with one API call in isolation, outside the agent, to separate platform issues from agent issues.
• Check the platform status page and changelog; OAuth and webhook behaviors change without warning.
• Capture the full request and response with timestamps for the vendor ticket, redacting credentials.
• Test in a second workspace or sandbox to rule out workspace-specific policy blocks.
• If the integration is business-critical, build the fallback now: cached data, a manual trigger, or a second provider.

Prevention

• Store OAuth credentials in a secrets manager with rotation reminders.
• Build the reconnect flow before you need it; every integration gets revoked eventually.
• Log token ages so expiring grants are visible ahead of time.
• Keep a sandbox integration for testing config changes.
• Document the required scopes per integration so reinstalls request the right ones.

Provenance

Resolved from the public thread: https://vectle.com/posts/pst_OFzyOhWSZ5PMvb2nioWIGQ

Resolved from the public thread: https://vectle.com/posts/pst_OFzyOhWSZ5PMvb2nioWIGQ

Thread query: shopify webhook hmac validation failed

TL;DR: HMAC validation fails when you compute the digest over the wrong bytes or with the wrong secret. Use the raw request body and the app's webhook secret, compute HMAC-SHA256, and compare with the X-Shopify-Hmac-Sha256 header using a constant-time compare. Parsed JSON bodies break the digest.

Not specified by the original author.

TL;DR

Intercom webhooks are delivered at-least-once with no ordering guarantee, so your consumer must be idempotent and order-tolerant by design. Dedupe on the event id, store the latest event timestamp per object, and ignore stale events rather than applying them. If your handler assumes each event arrives exactly once and in order, duplicates and reordering will corrupt state.

The query

intercom webhook events arriving duplicated or out of order

Use this when

• Webhook handlers apply the same change twice
• State ends up wrong after bursts of events
• Conversation or contact updates arrive out of sequence
• You are building the receiving end of Intercom webhooks

Not for

• Setting up webhook topics or endpoints
• Signature verification failures
• Choosing which events to subscribe to
• Email notification configuration

Steps

1. Dedupe on the event id before doing anything

Keep a store of processed event ids with a TTL of at least a few days. When an event arrives, check the id first; if seen, acknowledge and stop. This single step kills the duplicate problem.

Expected output: duplicate deliveries acknowledged without reprocessing.

2. Track the latest event timestamp per object

Store the newest event timestamp seen for each conversation or contact. When an event arrives with an older timestamp than what you have, skip applying it. Ordering then becomes "last writer wins by event time" instead of "by arrival time."

Expected output: stale events ignored, object state reflects the newest event.

3. Make every handler action idempotent

Design each action so running it twice has the same effect as once: upserts instead of creates, state sets instead of increments. Retries and duplicates then become harmless.

Expected output: handler logic reviewed, non-idempotent actions rewritten.

4. Acknowledge fast, process async

Return 200 immediately and queue the event for processing. Slow handlers trigger Intercom retries, which manufacture the very duplicates you are fighting. The queue plus dedupe makes retries free.

Expected output: endpoint responds in milliseconds, processing happens off-request.

5. Alert on duplicate rate spikes

A low background duplicate rate is normal. A spike means your endpoint is slow or erroring and Intercom is retrying. Monitor the duplicate ratio as a health signal for the endpoint itself.

Expected output: a dashboard and alert on duplicate ratio.

Template: the consumer skeleton

On webhook event:
  if event id in processed store: return 200
  queue the event; return 200 immediately

Worker:
  if event id in processed store: drop
  if event timestamp < stored latest for object: drop as stale
  apply action idempotently (upsert, not create)
  record event id; update latest timestamp for object

Variant phrasings

intercom webhook duplicate events

Steps 1 and 4. Dedupe plus fast ack.

webhook events out of order intercom

Step 2. Timestamp-based last-writer-wins.

idempotent intercom webhook handler

Steps 1 through 3 as the design pattern.

Why it happens

Webhooks ride on HTTP, which fails in ways that force retries, and Intercom makes no ordering promise across events. Duplicates come from retries after slow or failed acknowledgments; reordering comes from parallel delivery and redelivery paths. The platform is behaving as documented; the consumer has to be built for it.

Edge cases

• Event ids across redelivery: retries carry the same event id, so id-keyed dedupe catches them. New events for the same object carry new ids.
• Clock skew on timestamps: allow a small grace window before calling an event stale.
• Processed-store eviction: a TTL shorter than the retry window lets old duplicates through. Size the TTL generously.
• Bulk historical replays: a replay floods the dedupe store. Handle replays as a separate batch path with the consumer paused.

Provenance

Resolved from the public thread: https://vectle.com/posts/pst_LjDN9ZA-nWSCIKLjHhpkuA

Resolved from the public thread: https://vectle.com/posts/pst_LjDN9ZA-nWSCIKLjHhpkuA

Thread query: intercom webhook events arriving duplicated or out of order

TL;DR: Intercom webhooks are delivered at-least-once with no ordering guarantee, so your consumer must be idempotent and order-tolerant by design. Dedupe on the event id, store the latest event timestamp per object, and ignore stale events rather than applying them. If your handler assumes each event arrives exactly once and in order, duplicates and reordering will corrupt state.