Plandalf
← TaxJar integrations

Integration pair

Connect TaxJar and Custom API

Start with TaxJar and connect it to Custom API: Use TaxJar and Custom API together in a Plandalf checkout and post-purchase workflow. Plandalf keeps checkout, offer data, buyer records, and follow-up events aligned.

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tax

TaxJar

Automated sales tax for the US and Canada.

Plandalf

Commerce workflow

Offers, Timers, checkout data, payment context, invoices, entitlements, and events.

sdk

Custom API

Custom API participates in this Plandalf integration path.

Setup pattern

One checkout event, multiple systems updated

  1. 1. Define the offer and buying surface - Build the offer, product, price, coupon, order bump, upsell, invoice, and checkout mode in Plandalf before TaxJar or Custom API receives data.
  2. 2. Connect the app roles - Use TaxJar for its tax role and Custom API for its sdk role, with Plandalf carrying the commerce context between them.
  3. 3. Route the purchase event - Send buyer, product, payment, invoice, deadline, coupon, and fulfilment state into webhooks, API handlers, or sequences after checkout.
  4. 4. Keep the operator controls visible - Confirm integrations, payment options, test mode, tax settings, invoices, and automation settings in the app before sending traffic live.

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Product screens that matter for this integration

The useful version of a TaxJar and Custom API integration is not just an app directory card. It shows the Plandalf screens where Offers, payment options, invoices, integrations, Automations, and API handoffs are actually configured.

The Numi offer editor showing layout, product, theme, automation, invoice, and settings controls.

Offer configuration is the source of truth

The TaxJar and Custom API integration should start from the offer record: product, price, checkout mode, invoice, and automation context.

OffersProductsPricesInvoices
The Numi offer editor showing hosted checkout mode controls.

The checkout launch point is explicit

Use hosted checkout, embedded checkout, buy buttons, or SDK checkout depending on where TaxJar and Custom API sit in the stack.

Hosted checkoutBuy buttonSDK checkoutAPI-first stack
The Numi integrations settings page showing Stripe, PayPal, TaxJar, and Avalara connection options.

Integration settings are inspectable

Check Stripe, PayPal, TaxJar, Avalara, and test-mode routing before the TaxJar and Custom API integration goes live.

IntegrationsStripePayPalTax platforms

Keep these references open

Use these Plandalf pages when building the TaxJar and Custom API path so every feature, integration, sequence, and API handoff has a next click.

TaxJar platform page Roles, capabilities, and setup patterns for TaxJar. Custom API platform page Roles, capabilities, and setup patterns for Custom API. API-first stack SDK checkout, API keys, webhooks, payment processors, and invoices together. Checkout completed fulfilment A sequence recipe for fulfilment after a successful purchase.

Feature detail