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Developer Guides

Guides on localhost tunneling, local webhook debugging, ngrok alternatives, and secure HTTPS tunnels for modern development teams.

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Stripe Connect Webhooks: The Local Testing Guide

Test Stripe Connect webhooks locally. Account events, the connected-account header, deauthorization handling — what regular Stripe guides leave out.

2026-07-08T13:59:00.000ZPortPreview Team
StripeStripe Connectmarketplacewebhook debugging

Discord Webhooks vs Interactions, Tested Locally

Discord webhooks are easy. Discord interaction endpoints are not. Here is the practical guide to testing both locally with HTTPS and Ed25519 verification.

2026-07-06T08:26:00.000ZPortPreview Team
Discordwebhook debugginglocal testingbots

Why Your Webhook Returns 401 or 403 (and How to Fix It)

Webhook 401 and 403 errors are almost always one of five things. A diagnostic walkthrough that pinpoints which one before you waste an afternoon.

2026-07-04T16:33:00.000ZPortPreview Team
webhook debuggingHTTP errorsauthenticationtroubleshooting

Webhook Signature Verification, Without the Mystery

Most webhook signature failures aren't crypto bugs. They're parsing bugs. Real fixes for HMAC, timing-safe comparison, replay attacks, and raw-body handling.

2026-07-02T11:07:00.000ZPortPreview Team
webhook securityHMACsignature verificationbest practices

Test Shopify Webhooks Locally Without Surprises

Test Shopify webhooks locally and stop chasing HMAC bugs. Real fixes for base64 signatures, raw body parsing, and the test-store gotchas nobody mentions.

2026-06-30T07:44:00.000ZPortPreview Team
Shopifywebhook debugginglocal testinge-commerce

Next.js Webhooks on Localhost, Done Right

Test Next.js webhooks locally with a tunnel. Raw body in route handlers, App Router edge cases, and the Stripe signature pattern that actually works.

2026-06-28T14:51:00.000ZPortPreview Team
Next.jsApp Routerwebhook debugginglocal testing

Test Twilio Webhooks Locally: Full Guide

Test Twilio webhooks locally for SMS, voice, and messaging callbacks. Use a secure HTTPS tunnel to inspect payloads and validate signatures on localhost.

2026-06-26T09:28:00.000ZPortPreview Team
Twiliowebhook debuggingSMSlocal testing

PortPreview vs localtunnel: Which to Use?

Compare PortPreview vs localtunnel for webhook debugging, HTTPS reliability, and request inspection. Find the best tunnel tool for your dev workflow.

2026-06-24T17:03:00.000ZPortPreview Team
comparisonlocaltunnellocalhost tunnelingopen source

PortPreview vs ngrok: Best Alternative

Looking for an ngrok alternative? Compare PortPreview vs ngrok for localhost tunneling, webhook debugging, open-source transparency, and request inspection.

2026-06-22T12:14:00.000ZPortPreview Team
ngrok alternativecomparisonopen sourcetunnel CLI