Connecting Magento 2 quotes to an ERP or CRM is not mainly a question of moving data. The difficult part is deciding which system owns prices, customer records, approval decisions, delivery promises, and the final order. If two systems can change the same value without a clear rule, even a technically successful integration will produce conflicts.
Decide who owns each part of the quote
Create a small ownership table before designing endpoints:
| Information | Typical owner | Integration task |
|---|---|---|
| Customer and contact | CRM or ERP | Match a stable external ID to the Magento customer |
| Products and base prices | ERP/PIM/Magento | Send identifiers rather than relying on names |
| Requested quantities and files | Magento | Deliver the buyer's original request |
| Cost, discount authority, credit terms | ERP | Return approved commercial values |
| Messages and customer-visible status | Magento | Keep the storefront understandable |
| Order and fulfilment | Magento and ERP | Define the exact handover point |
The answer differs between businesses. What matters is that one system is authoritative for each value.
Use lifecycle actions instead of direct database writes
SoftwareSilo B2B Quote exposes PHP service contracts inside Magento. Direct web-service access is provided through separate add-ons:
- the REST/SOAP API add-on covers quote lists and records, items, addresses, messages, attachments, pricing and workflow actions, approval, rejection, recalculation, revisions, split and merge operations, and customer-owned quote actions;
- the GraphQL add-on provides storefront-oriented queries and mutations for registered customers and guests.
Choose the interface that fits the consumer. ERP middleware commonly uses REST or SOAP. A headless storefront may prefer GraphQL. Neither add-on is a ready-made connector for a particular ERP; the mapping and business rules still belong to the integration project.
Avoid writing directly to quote tables. A quote change may need totals recalculation, validation, a revision, a notification, and a legal status transition. A database update bypasses that behaviour.
Design the exchange around business events
A practical flow could be:
- Magento sends a newly submitted request and its external correlation ID to middleware.
- The ERP validates customer, products, availability, cost, and commercial terms.
- The integration updates items or prices through supported operations.
- Magento recalculates totals and records the new revision.
- An authorised action approves the quote and exposes it to the buyer.
- Acceptance creates the Magento order, which then follows the normal order integration.
Do not treat every save as a reason for a full two-way synchronisation. Exchange the events and fields the receiving system actually needs.
Plan for retries and duplicate messages
Networks fail and queue jobs are retried. Give each outbound event a unique correlation value and store the matching external reference. Before creating or applying an operation, check whether that event has already been processed.
Idempotency and retry storage are integration responsibilities; they should not be assumed merely because an endpoint exists. Define how to handle a timeout after Magento accepted a request but before the caller received the response.
Keep access narrow
Customer endpoints must remain limited to quotes owned by the authenticated customer. Administrative integrations should use a dedicated Magento integration with only the required permissions. Keep tokens out of URLs and logs, validate uploaded file types and sizes, and record failed transition attempts without logging confidential documents.
Integration checks worth automating
- an unknown customer or SKU fails with a useful error;
- a repeated event does not create a duplicate quote or revision;
- an outdated update cannot overwrite a newer accepted version;
- taxes, currency, discounts, fees, and shipping totals remain consistent;
- a customer cannot read another customer's quote;
- attachments survive the transfer without becoming public;
- acceptance creates exactly one order;
- a failed ERP response leaves the quote in a recoverable state.
Frequently asked questions
Does Magento 2 include a generic quote API?
Magento exposes cart APIs, but those are not the same as a negotiated B2B quote lifecycle. The SoftwareSilo API add-ons expose actions belonging to the B2B Quote module.
Should the ERP or Magento calculate the final price?
Choose one source of truth. Magento can apply quote pricing rules, while an ERP may own cost and customer agreements. Mixing both without precedence rules causes drift.
Is GraphQL required for a headless quote storefront?
It is a suitable option, not a requirement. The separate GraphQL add-on provides quote queries and mutations designed for customer and guest flows.
Can the integration approve quotes automatically?
Yes, when the integration is authorised and the business rules allow it. Keep approval separate from a routine data update.
See SoftwareSilo B2B Quote and its API add-ons for supported quote operations.