Postcode Lookup API
Address verification tools
- Features
- Ease of use
- Ease of management
- Quality of support
- Affordability
- Market presence
Take the quiz to check if Postcode Lookup API and its alternatives fit your requirements.
Pay-as-you-go
Free Trial
Free version unavailable
Small
Medium
Large
-
What is Postcode Lookup API
Postcode Lookup API is an address verification and enrichment API focused on looking up and validating UK postcodes and returning structured address details. It is typically used by developers and operations teams to power address autocomplete, form validation, and address normalization in checkout, onboarding, and CRM workflows. The product centers on postcode-to-address retrieval and related validation rather than broader identity, fraud, or payments use cases.
Developer-friendly API integration
The product is delivered as an API, which fits common integration patterns for web and mobile forms. Teams can use it to standardize address capture and reduce manual entry in customer-facing workflows. API-based delivery also supports embedding into existing applications without replacing upstream systems.
UK postcode-centric coverage
A postcode-first design aligns well with UK address capture, where postcodes are commonly used to retrieve full address candidates. This can simplify user input flows and improve consistency of stored address data. It is a practical fit for organizations that primarily operate in the UK and need postcode-driven lookup.
Supports address normalization workflows
Returning structured address components enables downstream normalization for CRM, billing, shipping, and compliance records. This helps reduce duplicates caused by formatting differences (e.g., abbreviations and line breaks). It also supports basic validation checks by comparing user-entered data to returned address candidates.
Limited scope beyond addresses
The product focuses on postcode/address lookup and does not inherently cover adjacent needs such as identity verification, fraud signals, or payment-linked verification. Organizations that want a single platform for onboarding and risk checks may need additional vendors. This can increase integration and vendor-management overhead.
Geographic dependence on UK data
A postcode-centric API is most valuable in the UK and may not translate well to countries with different addressing systems. Companies operating across multiple regions may need separate solutions for non-UK address verification and autocomplete. This can lead to inconsistent user experiences across markets.
Data quality varies by source
Address accuracy and completeness depend on the underlying reference datasets and update cadence, which are not specified here. If datasets lag behind new builds or boundary changes, lookups may return missing or outdated results. Buyers typically need to validate coverage, latency, and update frequency during evaluation.
Plan & Pricing
Pricing model: Pay-as-you-go Free tier/trial: 1-month trial — 50 free credits, no credit card required. Example costs:
- 200 Credits — £9 (≈ £0.045 per lookup)
- 1,100 Credits — £42 (≈ £0.038 per lookup)
- 4,300 Credits — £155 (site also displays 4,400 credits for the same £155 in another section)
- 12,800 Credits — £420 (≈ £0.033 per lookup)
- 32,100 Credits — £900 (≈ £0.028 per lookup) Notes & terms:
- Credits are valid for 12 months from first use.
- No setup, monthly, or hidden fees; volume discounts available via larger bundles.
- Enterprise/custom packages available (contact sales) including SLAs and bespoke integrations.
