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Cairn
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Integrations

Connects to the stack you already run

Shopify syncs natively today. Everything else in your stack, payments, logistics, banking, CRM, is reachable through an open REST API, webhooks, and an MCP server, so data flows in and stays current.

The stack Cairn connects to, natively or over the API.

Native today

Shopify

Products, inventory, and orders sync between Shopify and Cairn, with webhooks keeping both sides current as sales come in.

REST API & webhooks

Every record, products, orders, inventory, and the ledger, is reachable over authenticated REST with per-tenant keys.

MCP server

Connect Claude and other MCP clients straight to your live data: list records, fetch documents, and run read-only queries.

Connect through the REST API

The rest of the stack is reachable over the API and webhooks: build the connection your operation needs on the same mappings the app uses internally. Native connectors land as design partners need them.

Commerce & marketplaces

  • Amazon
  • TikTok Shop
  • WooCommerce
  • BigCommerce

Payments & banking

  • Stripe
  • PayPal
  • Square
  • Bank feeds via Plaid

Logistics & 3PL

  • ShipStation
  • ShipHawk
  • EDI (850 / 856)
  • 3PL partners

CRM & marketing

  • Salesforce
  • HubSpot
  • Mailchimp
  • Freshdesk

HR & payroll

  • Deel
  • ADP
  • Paycom
  • Gusto

PM & collaboration

  • Monday.com
  • Smartsheet
  • Slack
  • Microsoft Teams

Hook into anything with a customizable API

Every record in Cairn is reachable over a REST API authenticated with per-tenant keys, plus a read-only Prism endpoint for ad-hoc queries against your live data. Build the connection your operation needs, on the same mappings the app uses internally.

  • REST API for products, orders, inventory, and the ledger
  • Read-only Prism queries for custom reporting
  • Per-tenant API keys with row-level isolation
API reference available on requestTalk to us 
curl https://app.cairnerp.com/api/v1/products \
  -H "Authorization: Bearer $KEY"

{
  "data": [
    { "sku": "DRW-BEV-001", "onHand": 8420 }
  ]
}

Replace your legacy ERP. In weeks.

Twelve months and six figures used to be the price of admission. Not anymore.

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White-glove implementation No per-transaction fees No surprise invoices