Nexura DigitalAI · Automation · Marketing
Nexura Digital service

Custom API integrations between the tools you already use

When data is copied by hand between apps, sooner or later it gets copied wrong. We connect your tools through their APIs so information moves on its own, with error handling built in.

A custom API integration connects applications that don't talk to each other, like your online store and your ERP or your forms and your CRM, so data syncs without manual work. We design and document it for companies that copy data by hand or rely on exports today. You start with a 7-day trial: one workflow in one direction between two systems, with alerts if anything fails.

What we connect, and how

Typical cases

  • Store orders flowing into your ERP or invoicing software
  • Forms and lead ads creating CRM contacts without duplicates
  • Appointments or bookings that create the customer record
  • Stock levels or prices updated across several channels at once

Technology

REST and GraphQL APIs, webhooks, older SOAP services, or CSV files over SFTP when there's no other option. We build with n8n and its HTTP Request node and, when volume or logic calls for it, with a small Node.js or Python service on your server.

Before we build: when it fits and when it doesn't

It makes sense if

Both tools offer an API, the manual work repeats every day and copy errors have already caused headaches, such as duplicate orders or invoices with outdated data.

It's not the right fix if

  • A native integration or marketplace app already covers what you need
  • A system has no API or export and could only be automated by mimicking clicks
  • The real problem is process: nobody knows which system owns each piece of data
  • You need real-time sync at very high volume: n8n may not be the right tool, and we'll tell you

Technical details that prevent surprises

Integrations rarely fail because of the connection itself; they usually fail on details like these.

Resilience

  • Rate limits (HTTP 429) handled with retries and exponential backoff
  • Full pagination so no records get missed
  • Idempotency keys or external IDs to avoid duplicates
  • Webhook signature verification

Consistent data

  • One system of record for each field
  • Normalized time zones, decimals and currencies
  • Accented and special characters that arrive intact
  • Regular reconciliation of record counts at source and destination

Our working method

Map and design

We map how data travels, define which system owns each field and agree on what happens with conflicts and deletions.

Build and test

We work against sandbox environments when the API offers them, with real cases and edge cases, and create credentials in your accounts with minimum permissions.

Go live and monitor

We switch on in phases, with email or Slack alerts and a log of every execution.

What you get at the end

Deliverables

  • Working integration on your server, n8n Cloud or a VPS, with its cost included in the quote
  • Data flow map and field mapping table
  • Error handling, retries and alerts
  • Documentation of credentials, permissions and how to rotate them

7-day trial: one workflow, one direction

A first, scoped integration

We choose with you the connection that removes the most manual work, for example creating each form lead in the CRM without duplicates, or sending each order to your invoicing software. We build it in one direction, with error alerts and logging, and validate it with real data. Before kickoff, we put the scope, dates and terms in writing.

FAQ

Frequently asked questions

What if one of my tools has no API?

First we look for reliable alternatives: scheduled exports, database access, file imports or the emails the tool sends. Automating the interface by mimicking clicks is sometimes possible, but it breaks with any screen change, so we only suggest it as a last resort, with that warning in writing.

Can data sync both ways?

It can, but it multiplies the hard cases: two people editing the same record, a deletion on one side, or a loop that keeps resending changes. That's why we usually start in one direction and, if the other is needed, first define which system wins for each field and how to prevent loops.

What happens when an API changes versions?

Vendors usually announce changes and retire old versions with notice. We document which version each integration uses and leave test cases to quickly check whether something broke, and error alerts fire as soon as an execution fails. Ongoing maintenance can stay with your team or be contracted separately.

Who owns the integration?

Your company does. Credentials are created in your accounts, workflows run on a server you pay for and any code lives in a repository you own. That way you can switch providers or maintain it in-house without depending on us, with documentation any technical person can follow.

Contact

Which two tools would you connect first?

Tell us which ones, what data needs to move between them and how often. We'll review their APIs and get back to you with a written 7-day trial proposal.

Phone+34 603 636 249
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Emailnexuradigital2026@gmail.com
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n8n · AI

How much time could automation give back?

Get a rough estimate of the savings with n8n and AI.

50%
0hours a month
0saved a month
0saved a year

Formula: weekly hours × 4.33 × automatable share × hourly cost. It is an estimate, not a promise; during the 7-day trial we measure it with your real case.