The Transaction Enrichment API is now live!
We just launched the Transaction Enrichment API – merchant intelligence on top of your bank data, live now.
Finexer provides platforms access to verified bank transaction data across UK banks – real-time feeds, balance data, payment history, and structured financial records through Open Banking infrastructure.
The Transaction Enrichment API takes that foundation further. Where Finexer’s AIS delivers verified bank transaction data, the enrichment layer adds the intelligence on top – merchant identity, spending category, billing pattern classification, and location data returned on every transaction automatically.
This feature does not replace your existing Finexer integration. Instead, it works as an additional layer that enhances the transaction data you already use. By adding merchant intelligence on top of verified bank data, platforms can support workflows like reconciliation, compliance checks, spend analysis, and financial reporting with less manual processing or custom data mapping.
What is new:
- Merchant Identity – verified merchant names and legal entities across 100M+ merchants
- Categorisation – structured spending categories applied to every transaction automatically
- Billing Pattern Detection – recurring payments and subscriptions identified without custom logic
- Location Data – structured geographic signals extracted from transaction descriptors
- Production-ready REST API with real-time and batch enrichment support
What Does the Transaction Enrichment API Add?
Finexer’s AIS already provides what most platforms need – verified, real-time bank transaction data directly from the source. What a raw transaction descriptor does not carry is merchant context. A record showing “TESCO STORES 2847 LONDON” confirms a transaction occurred. It does not tell a platform what category that transaction belongs to, where it happened, or whether it is part of a recurring billing pattern.
The Transaction Enrichment API adds that context in a single call. Every transaction descriptor is matched against a database of 100M+ merchants and returned with structured intelligence that platforms can act on immediately
From this: “TESCO STORES 2847 LONDON”
To this:
- Merchant name: Tesco Stores Ltd
- Category: Grocery Retail
- Location: London, UK
- Transaction type: Card Payment (POS)
- Confidence score: 96%
Smart Capabilities Available From Launch
Categorisation
Every transaction is automatically classified into a structured spending category – Groceries, Transport, Utilities, Subscriptions, Professional Services, and more. No manual tagging and no custom classification logic required on the platform side.
Merchant Identity
Every transaction is matched to a verified merchant name, legal entity, and brand identifier. Platforms receive a structured counterparty on every transaction rather than a raw bank descriptor that requires downstream processing.
Billing Pattern Detection
Recurring payment activity and subscription commitments are identified automatically. Billing cycles, ongoing financial obligations, and one-time purchases are distinguished without rule-based configuration – supporting subscription analytics, expense management, and income verification workflows out of the box.
Location Data
Structured geographic data is extracted from raw transaction descriptors – returning city, country, and transaction context on every enrichment output for platforms that require merchant geography in their data models.
“Finexer’s AIS has always given platforms verified bank data at source. The enrichment layer is the natural next step – the same reliable data foundation, now with merchant intelligence attached so platforms can build richer product features without additional data processing overhead.” – Yuri, Finexer
See how transaction enrichment works with structured bank APIs
Where Platforms Are Using It
Operational Value Across Every Major Vertical
| Platform Type | Workflow Requirement | What the Enrichment API Delivers |
|---|---|---|
| Accounting & ERP | Automated reconciliation and general ledger coding | Categorised, merchant-mapped transactions ready for ledger matching |
| Lawtech | Client verification and payment collection documentation | Structured counterparty data with merchant identity for compliance review and audit trails |
| EPOS | Daily transaction reporting and payment reconciliation | Structured merchant identity and location data applied per transaction at point of retrieval |
| Payroll & Invoicing | Income verification and business expense categorisation | Recurring payment detection and salary pattern identification from transaction history |
| Proptech & Real Estate | Affordability checks and rental income verification | Categorised transaction data confirming income patterns and payment behaviour per applicant |
| Utility Billing | Pay by Bank payment tracking and billing reconciliation | Structured payment references and transaction data per billing cycle for accurate reconciliation |
How the transaction data enrichment api works for SME platforms
Why Choose Finexer Over Alternative Approaches
Performance at Scale
| Approach | Operational Limitations | Finexer Transaction Enrichment API |
|---|---|---|
| Build in-house | Significant engineering investment, ongoing maintenance, slow iteration against changing descriptor formats | Pre-trained on 100M+ merchants, production-ready, no ML team required |
| Generic LLMs | Inconsistent accuracy on financial descriptors, high latency, no dedicated merchant database | 95%+ accuracy, sub-100ms latency, purpose-built merchant intelligence database |
| Legacy rule-based engines | Brittle pattern matching, poor long-tail merchant coverage, manual mapping overhead | ML-powered enrichment with real-time confidence scoring and 100M+ merchant coverage |
Built for Developers
The Transaction Enrichment API is built on a production-ready REST architecture that supports both real-time and batch enrichment patterns – making it straightforward to integrate into existing transaction pipelines regardless of how a platform currently processes bank data.
It requires no model training, no data labelling, and no specialist ML resource. Full merchant mapping documentation is available from day one, and platforms already on Finexer AIS can add enrichment through a single additional endpoint without modifying their existing data flows or consent architecture.
Getting Started
Platforms can request API access directly through the Book a Demo flow. Finexer hands on onboarding support and unlimited sandbox access so engineering teams can validate enrichment output against their own transaction data before going live.
How the data enrichment api works for UK financial platforms
What does Finexer’s transaction enrichment api return?
It returns verified merchant name, category, location, billing pattern, transaction type, and confidence score – per transaction, in a single API call under 100ms.
How is this different from building categorisation in-house?
In-house builds require significant engineering time and ongoing maintenance. Finexer’s transaction data enrichment api is pre-trained across 100M+ merchants and production-ready from day one – no model training or data labelling needed.
What transaction types does the enrichment layer cover?
It covers all standard UK bank transaction types – card payments, direct debits, bank transfers, and standing orders – returning structured merchant intelligence on each.
From transaction data to merchant intelligence in a single API call. Book a demo now !
About the Author
Finexer
The Finexer Team is a collective of fintech engineers, payments specialists, and Open Banking experts working on financial infrastructure for UK businesses. Finexer builds API-driven solutions that allow companies to access real-time bank data, initiate Pay by Bank payments, and integrate financial services directly into their products.