Royal Mail API · Click & Drop · Pro Shipping · UK
Royal Mail API Integration.
Custom Royal Mail API integration for UK businesses — label generation, Click & Drop automation, Tracked 24/48 service selection, manifest submission and despatch workflows built directly into your platform. Fixed price. You own the code.
Or describe what you need in one line — I’ll reply within one business day.
What it does
What the Royal Mail API provides.
The Royal Mail API gives businesses programmatic access to Royal Mail’s full shipping infrastructure — creating shipments, generating labels, booking collections, submitting manifests and tracking parcels, all without anyone manually logging into the Royal Mail portal.
A custom integration connects directly to your order management system, WooCommerce store or bespoke platform. When an order is placed, the integration automatically creates the Royal Mail shipment, selects the right service based on your rules, generates and routes the label to your printer, captures the tracking number back to your order record, and submits the end-of-day manifest on a schedule. The entire despatch process runs without manual intervention.
API products
Which Royal Mail API is right for you.
Royal Mail offers several API products depending on your despatch volume and integration requirements. Part of the scoping process is identifying the right one for your business before development begins.
Click & Drop API
Best for most ecommerce businesses. Automates order import, label generation and manifest submission through Royal Mail’s Click & Drop platform. Simpler authentication, lower volume threshold, covers all domestic Royal Mail services.
Pro Shipping API
For higher volume operations needing direct control over service selection, label formats, EORI/IOSS data for international orders and automated manifest submission. More complex authentication via OAuth 2.0.
Mailmark API
For large-scale fulfilment processing over 1,000 items daily. Discounted postage rates, barcode-level tracking and enterprise-grade automation. Royal Mail approval required.
Who it’s for
Who uses a Royal Mail API integration.
Ecommerce businesses on WooCommerce or custom platforms
When an order is placed, the integration automatically creates the Royal Mail shipment, generates the label and prints it, sends the tracking number to the customer and updates the order status — without anyone touching it. The daily manual process of logging into Click & Drop, importing orders and printing labels is eliminated entirely. For businesses spending 30–60 minutes a day on manual despatch, the time saving is immediate.
Subscription box and recurring despatch businesses
For subscription businesses sending regular despatch runs, the integration triggers bulk label creation on a schedule, automatically selects the right service for each package based on weight and value, exports manifests without manual steps and handles service upgrades for high-value boxes. The despatch day runs from a single trigger rather than requiring anyone to work through the portal manually.
Multi-channel sellers with bespoke order management systems
Businesses selling across their own site, Amazon, eBay and wholesale often have a custom OMS that needs to push shipments directly to Royal Mail without going through a third-party plugin. The integration connects directly to the OMS, reads order data, creates shipments and writes tracking numbers back — compatible with any platform that can make an HTTP request.
High-volume despatch operations
At the higher end, the integration handles Tracked 24/48 service selection automatically based on order value, delivery speed chosen at checkout and package dimensions, routes labels directly to thermal printers in ZPL format, submits manifests before each collection window, and handles failed delivery events from the tracking API to trigger automatic customer notifications.
Businesses with custom service selection requirements
Plugins offer a single service or a basic weight band dropdown. A custom integration implements your specific rules: orders over £75 on Special Delivery, items over 750g on Tracked 48 Parcel, next-day orders placed before 1pm on Tracked 24, international orders routed to the correct international tracked service by destination. Configured once, applied automatically to every order.
Why custom
Why a plugin won’t cut it.
Royal Mail plugins exist for WooCommerce and handle common scenarios. The limits become apparent quickly when your requirements go beyond a single default service.
Custom service selection
Plugins offer weight bands or a manual dropdown. A custom integration applies your rules automatically — value thresholds, delivery speed options, product categories, destination-based selection — on every order.
Automated manifest submission
Plugins don’t submit manifests automatically. A missed manifest delays your entire day’s collection. The integration submits on a schedule, every day, without anyone having to remember.
No third-party dependency
You own the code outright. No ongoing SaaS fees, no vendor risk, no waiting on a plugin developer to release a WooCommerce-compatible update after a major version change.
Thermal printer support
Plugins generate PDFs. A custom integration routes ZPL labels directly to thermal printers — Zebra, Dymo, BIXOLON — so labels print automatically without anyone clicking.
The process
How a Royal Mail API integration is built.
Scoped before anything is built. Fixed price agreed in writing. Tested against real orders before handover.
Scoping
We establish your despatch volume, platform, Royal Mail account type, service selection rules and any custom requirements. This determines which API product is appropriate and what the build involves.
Fixed-price quote
Clear, itemised quote before work begins. Scope agreed in writing. No surprises mid-project.
API authentication and sandbox setup
Royal Mail API credentials configured, authentication implemented, and the full integration built and tested against the sandbox environment before connecting to your live account.
Build and integration
Shipment creation, label generation, service selection logic, thermal printer routing, tracking capture and manifest submission all built and integrated with your platform or OMS to specification.
Testing and handover
End-to-end testing with real orders across all service types and edge cases. Error handling and alerts configured. Complete technical documentation — you own the code with no ongoing dependency on me.
The deliverable
What’s included.
Every integration is scoped, quoted at a fixed price and built to your exact requirements. You own the code outright.
What I build
- Royal Mail API authentication and secure credential handling
- Shipment creation triggered by your order events
- Label generation in your required format (PDF or ZPL for thermal printers)
- Custom service selection logic built to your rules
- Tracking number capture and write-back to your order record
- Automated manifest submission on a schedule
- Tracking event retrieval and customer notification triggers
- Error handling, retry logic and failed shipment alerts
- Technical handover document
What’s not included
- Royal Mail business account registration (done by you — required before build starts)
- Royal Mail API developer portal registration (free, typically 1–5 days to approve)
- Actual postage costs — charged by Royal Mail directly, not part of the build cost
- Thermal printer hardware — integration supports your existing hardware
- Changes to your existing platform outside the integration scope
- Scotland, Northern Ireland or Channel Islands routing exceptions not in agreed scope
Pricing
Fixed-price builds. No hidden costs.
Every build is scoped and quoted at a fixed price. Royal Mail API access is free — no per-label API charges once the integration is live.
Click & Drop
£995
~1–2 weeks
Full Click & Drop API integration for WooCommerce or a custom platform. Automatic shipment creation, label generation, tracking number write-back and scheduled manifest submission. Service selection based on your rules. For businesses sending up to ~1,000 items per day.
- Click & Drop API authentication
- Automatic shipment creation from order events
- Label generation (PDF or ZPL)
- Custom service selection rules
- Tracking number write-back
- Scheduled manifest submission
- Error handling and alerts
- Pro Shipping or Mailmark API
- Multi-warehouse routing
Pro Shipping
£1,995
~2–3 weeks
Pro Shipping API integration for higher-volume operations. OAuth 2.0 authentication, direct label format control, EORI/IOSS data for international shipments, thermal printer routing and sophisticated service selection logic. For businesses with complex requirements or volume exceeding Click & Drop.
- Everything in Click & Drop
- OAuth 2.0 authentication with token caching
- Direct label format control
- International shipping with EORI/IOSS data
- Advanced service selection logic
- OMS integration (any platform)
- Thermal printer routing (ZPL)
Mailmark & Enterprise
from £2,995
~3–4 weeks
Enterprise-scale Royal Mail integration for operations processing 1,000+ items daily. Mailmark barcode generation, discounted postage rate calculation, multi-warehouse routing and full OMS or WMS integration. Scope varies at this level — get in touch and I’ll come back with a fixed price based on your specific requirements.
- Everything in Pro Shipping
- Mailmark barcode integration
- Discounted postage rate calculation
- Multi-warehouse routing logic
- Full WMS or enterprise OMS integration
- Bulk label batching and print management
- Fixed price agreed after scoping
Payment terms: 50% on agreement, balance on completion before handover. Royal Mail API registration is free but requires your own business account — apply at developer.royalmail.net. Mailmark and enterprise builds quoted individually after scoping.
Common questions
Royal Mail API FAQ.
Do I need a Royal Mail business account before the build can start?
Yes — you need an active Royal Mail OBA (Online Business Account) and to register as an API developer through the Royal Mail Developer Portal. For Click & Drop, registration is straightforward and typically approved within a few days. For Pro Shipping, Royal Mail requires a brief approval process. I advise on the right account type during scoping.
What’s the difference between Click & Drop and Pro Shipping?
Click & Drop is Royal Mail’s platform for small to medium volume businesses, typically up to around 1,000 items per day. It has simpler authentication and is easier to get access to. Pro Shipping is a more direct API for higher-volume or more complex operations, offering greater control over label formats, service selection and international shipment data. Most businesses start with Click & Drop. The scoping call determines which is right for your volume and requirements.
Can the integration handle Tracked 24, Tracked 48 and Special Delivery automatically?
Yes — service selection is one of the key advantages of a custom integration over a plugin. The integration applies your rules automatically: orders over a value threshold use Special Delivery; next-day shipping options use Tracked 24; standard options use Tracked 48; large items use the parcel format rather than large letter. Configured once and applied to every order without manual decisions at despatch.
Can it print labels directly to my thermal printer?
Yes. The integration can request labels in ZPL format from the Royal Mail API and route them directly to a configured Zebra, Dymo or BIXOLON thermal printer via TCP/IP. Labels print automatically the moment a shipment is created — no PDFs to download, no clicking print. This is included in the Pro Shipping and Mailmark tiers and can be added to Click & Drop builds.
What happens if the Royal Mail API is unavailable?
The integration implements retry logic for temporary unavailability — automatic retries with backoff for transient errors. If the API is unavailable for an extended period, the integration flags affected orders for manual review and sends an alert. No orders are silently lost — every failure is logged and actionable.
Can it handle international shipments with EORI and IOSS data?
Yes. International shipments requiring EORI numbers, IOSS registration, customs commodity codes and declared values are fully supported in the Pro Shipping and Mailmark builds. The integration reads the relevant data from your order management system and includes it correctly in the shipment creation request for each international destination.
What platforms can it integrate with?
Any platform with a database and server-side code — WooCommerce, custom PHP or Laravel applications, Python or Node.js systems, bespoke order management systems. The integration sits between your platform and the Royal Mail API. If your platform can fire an event when an order is placed, the integration can handle the rest.
How long does a Royal Mail API integration take?
Click & Drop integrations typically take one to two weeks. Pro Shipping builds take two to three weeks. Mailmark and enterprise builds take three to four weeks. Timeline starts once your Royal Mail API credentials are in hand, scope is agreed and the deposit is paid.
Royal Mail integrations are a frequent part of my Blackburn web design and development, and work hand in hand with SEO and local search to grow your orders.
Need Royal Mail API integration built?
Describe your platform, your despatch volume and what you’re currently doing manually — I’ll come back with a straight answer on what’s involved and what it costs. Fixed price, no obligation.
