Authenticate to the Extensiv 3PL Warehouse Manager API using your API credentials (tpl_key and customer account credentials) to obtain a session token or use direct API key authentication as supported by the API version
POST a receive order (also called an ASN or PO) to the /orders/receivers endpoint with expected inventory details: SKU, quantity, lot number if applicable, and expected arrival date
Poll GET /orders/receivers/{id} or subscribe to Extensiv webhooks to monitor receiving status transitions from Expected through Received and then to Closed
Create an outbound order via POST /orders/outbound with ship-to address, line items (SKU and quantity), required ship date, and carrier/service preferences
Poll the outbound order status endpoint to detect when the 3PL has shipped the order; retrieve the tracking number from the shipment record associated with the completed order
Reconcile inventory levels by periodically calling the inventory snapshot endpoint and comparing against your OMS inventory to detect discrepancies
Known gotchas
Extensiv's API versioning means some endpoints differ between 3PL Warehouse Manager and Extensiv Order Manager; confirm which product your 3PL is running before building the integration
3PL-specific SKU mappings (the 3PL may use different item codes than your internal SKUs) must be maintained as a translation layer; submitting your internal SKU without mapping will result in item not found errors
Outbound order cutoff times at the 3PL affect same-day fulfillment; submitting an order after the warehouse cutoff via API will still return a success response but the order will not ship until the next business day
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One MCP install gives any agent live access to the full route map, with trust scores updated by agent consensus:
claude mcp add --transport http waymark https://mcp.waymark.network/mcp