Is the API free to use?

Yes — quote queries are free with no rate limiting for reasonable usage. Booking labels may involve carrier transaction costs.

Do I need an API key?

No API key is required to fetch shipping quotes. Simply call the endpoint with your parcel details and receive instant results.

What countries are supported?

Origin must be a UK postcode. Destinations include UK domestic, USA, all EU countries, Australia, Canada, and many more.

How do AI agents use this?

Download the SKILL.md file and add it to your agent's context or install it as an OpenClaw skill. The skill tells the AI when to trigger, what to ask the user, and how to call the API correctly.

What dimensions and units are used?

Weight is in kilograms (kg), dimensions are in centimetres (cm), and value is in pence (GBP × 100). The SKILL.md includes unit conversion guidance.

Free · No sign-up · UK Parcel API

Compare UK Parcel Prices Instantly

A single API call returns real-time shipping quotes from Evri, DPD, Royal Mail, UPS, FedEx and more. Built for developers and AI agents. Free to query. No API key required.

Try Rate Calculator →View API Docs Download SKILL.md

UK Carriers: 6+
Avg Response: <200ms
Quote Queries: Free
OpenAPI Spec: REST

One API call. Every UK courier.

Stop integrating with carrier APIs individually. AI Parcels normalises quotes from every major UK courier into a single, consistent response.

STEP 01
Send parcel details
Pass your origin & destination UK postcodes, parcel weight (kg), dimensions (cm), and declared value to the quote endpoint.
STEP 02
Receive ranked quotes
Get back a list of carrier options with prices, estimated delivery timeframes, and service slugs you can use to book.
STEP 03
Book & complete checkout
Select a service and call the checkout endpoint to create a shipment order. You'll receive a payment URL to finalise the booking.

Lightning Fast: Edge-optimized endpoints return live rates from multiple carrier networks in under 200ms on average.
Best Price Guaranteed: Compare prices across all major UK couriers in a single response. You'll always find the cheapest rate for any parcel dimensions.
Developer First: Fully documented OpenAPI spec, interactive API reference, and a SKILL.md for AI agents. Integrate in minutes, not days.

Every major UK courier, one integration

We normalise rates from the UK's leading parcel carriers, including Royal Mail, Evri, DPD, UPS, and FedEx, so you never need to manage multiple API integrations again.

📮Royal Mail1st & 2nd class, Tracked
📦EvriStandard & Next Day
🚚DPDNext Day, Timed delivery
🟡UPSUK & International
🔵FedExExpress & International
✈️InternationalUK to USA, EU & more

Integrate in minutes

Our REST API is designed to be as simple as possible. Try hitting these endpoints directly.

curl -G https://api.ai.parcels.dotnethelp.co.uk/.api/quote/shipments/GB/GB \
  -d "weight=2.0" \
  -d "quantity=1" \
  -d "originPostcode=SW1A 2AA" \
  -d "destinationPostcode=EH2 2EQ" \
  -d "valueInUnits=1500" \
  -d "length=25" \
  -d "width=20" \
  -d "height=10"

Built for AI Agents

AI Parcels ships with a SKILL.md file written specifically so AI assistants like Claude, ChatGPT, and custom LLM agents understand exactly when and how to use the API — no fine-tuning or custom configuration required.

OpenAPI spec for automatic tool generation
SKILL.md with trigger phrases and parameter guidance
No API key required for quote queries
Unit conversion guidance built into the skill
Error handling instructions for AI agents
Compatible with Claude, GPT-4, Gemini, and others

View AI Integration Guides Download SKILL.md

Common questions

The UK Parcel API built for the AI era

AI Parcels is a free, open shipping rates API designed specifically for developers and AI agents who need to compare UK courier prices programmatically. Instead of scraping individual carrier websites or managing half a dozen separate integrations, you make one API call and receive a ranked list of quotes from all major carriers — including Royal Mail, Evri, DPD, UPS, and FedEx.

Why developers choose AI Parcels

Most courier APIs are designed for enterprise logistics software and come with lengthy sign-up processes, commercial agreements, and inconsistent data formats. AI Parcels takes a different approach: a single, clean REST endpoint that returns normalised data you can use immediately. There is no API key required for quotes, no sign-up, and the response schema is consistent across every carrier. Whether you're building a parcel price comparison tool, an e-commerce checkout, or an AI-powered shipping assistant, AI Parcels gives you the data you need in a format you can use.

Perfect for AI chatbots and LLM agents

As AI assistants become more capable of taking real-world actions on behalf of users, they need access to live pricing data. AI Parcels includes a SKILL.md file — a machine-readable description of what the API does, when to call it, and how to handle the results. This means an AI assistant can pick up this tool and use it correctly without any fine-tuning or custom configuration. The skill is compatible with OpenClaw, Claude, ChatGPT custom actions, Gemini Extensions, and any LLM framework that supports OpenAPI-based tool use.

UK domestic and international shipping

Whether you're sending a parcel from London to Edinburgh or from Manchester to New York, AI Parcels covers it. Specify your origin UK postcode, the destination postcode or country, and the parcel details, and the API returns the cheapest and fastest available services for that route. For international shipments, the API also guides you through customs requirements specific to the chosen carrier and destination country.

Ready to ship smarter? Start comparing UK parcel rates in minutes. No sign-up. No API key.

Try the Rate Calculator →Read the API Docs