OnPart Commerce Engine
OnPart is a strong example of how Letter B Global Technologies helps turn a complex business idea into a scalable technology platform. Through custom automotive software development, Letter B built an automated parts quoting system that changed manual supplier calls into fast, API-based, machine-to-machine commerce.
The Opportunity:Repair shops needed faster parts quotes, suppliers needed a better way to respond without constant phone calls, and the market needed a reliable platform that could process requests and return pricing in real time.
Building the automotive software behind machine-to-machine commerce.
Letter B served as the technical backbone of OnPart from the earliest stage, taking ownership of architecture planning, custom API development, database engineering, infrastructure scaling, and continuous support as the product matured into a high-volume quoting platform.
“This was not traditional ecommerce. It was unattended, machine-to-machine commerce built to keep the automotive repair ecosystem moving.”
Receive
Repair shop systems send parts quote requests directly into the platform.
Process
Rules engines, supplier logic, and API integrations evaluate pricing, availability, and response conditions.
Respond
Quotes are returned in real time, reducing the need for phone-based supplier outreach.
Scale
The system processes millions of parts across a nationwide network while supporting always-on operations.
When parts quoting outgrew manual work
Before OnPart, repair shops often had to call multiple suppliers to collect pricing for dozens of parts on a single job. This slowed down repair decisions, created inconsistent quoting, and added pressure on both shops and suppliers. As shop management systems became more advanced, the next step was clear: automate the quoting process.
Technical ownership from concept to scale
Letter B was engaged before OnPart had a finished product, established codebase, or final platform structure. Starting from a whiteboard concept, the team helped shape the technical foundation and then built the system into a production-ready platform.
Design the core architecture
Create the foundation for an automotive parts software platform capable of unattended quote processing with speed and reliability.
Build integrations & logic
Engineer API-based workflows, database structures, and rules engines to support accurate quote handling and pricing workflows.
Scale and support operations
Continue supporting infrastructure, database scaling, and production reliability as the platform grew to more than 2 million parts quoted per day.
A custom automotive software platform built for real-time quoting.
Letter B engineered OnPart as a scalable automotive software development project focused on automation, integration, and reliability. The platform helped repair shops and suppliers move away from manual quote workflows by creating a system that could process requests and return pricing information in real time.
Real-Time Quote Response
Repair shop software could send quote requests directly into the platform and receive pricing information quickly inside the repair workflow.
API-Driven Integrations
The platform connected with multiple shop management systems, supplier platforms, and vendor-specific tools through flexible API integration services.
Automated Rules Engines
Rules-based processing handled business logic, pricing conditions, supplier rules, and availability requirements without manual review.
High-Volume Processing
The system scaled from thousands of records to more than 2 million parts quoted per day with strong database engineering and infrastructure planning.
Always-On Operations
Continuous monitoring, infrastructure management, and 24/7 support helped maintain uptime for active repair workflows.
Integration Adaptability
OnPart stayed adaptable across APU-style systems, CCC-related workflows, vendor-specific APIs, and public or semi-public endpoints.
Workflow Automation
The platform replaced slow manual quoting steps with automated workflows between shop systems and supplier systems.
B2B Commerce Engine
This was not a basic catalog. It was a custom software platform built to support automated B2B request and response activity at scale.
From startup idea to national-scale platform
OnPart evolved from an early API processing concept into a large-scale automotive software platform supporting real-time parts quoting across a nationwide network. The result was not just a working application. It became a reliable quoting engine that helped support machine-to-machine commerce in the automotive repair market.
What changed across the workflow
Still evolving for the next wave of automation.
OnPart continues to grow as automation, data intelligence, and advanced response logic become more important across the automotive repair ecosystem. The platform stands as a long-term example of how Letter B builds and supports mission-critical software for companies with complex workflows, disconnected systems, and high-volume operational needs.
A focused snapshot of the platform, delivery scope, and business outcome.
- ClientOnPart
- IndustryAutomotive parts and repair ecosystem
- Project TypeAutomotive software development
- Platform FocusReal-time parts quoting and workflow automation
- Core CapabilitiesAPI integration, quote management, high-volume database engineering, 24/7 support
- Letter B ScopeArchitecture, engineering, integrations, database design, infrastructure scaling, production support
- Business OutcomeFaster, scalable, always-on quote response across a nationwide automotive market
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