Integrations, APIs and automation, in plain English.
Practical write-ups on building integrations that hold up in production. No fluff, written by the developer who ships them.
- 11 min read
ISO 27001 and integrations: the controls that actually matter when you connect systems
Integrating two systems means moving data across a network you do not control. The Annex A controls that apply to any integration, and what we actually do for each one.
ISO 27001SecurityIntegrations - 12 min read
Holded API v1 to v2: the 8 real traps when you migrate
The 8 things that break your integration when you migrate from Holded API v1 to v2: cursor vs offset pagination, RFC 7807 errors, scopes, bulk operations, webhooks that are not there yet, idempotency under concurrency. With code and real workarounds.
Holded APIMigrationDevelopment - 8 min read
Verifactu for the self-employed: the 10 questions we hear most
The 10 real questions foreign self-employed workers and companies ask us about Verifactu in Spain, with a direct answer, the applicable regulation and an actionable recommendation. No legal fluff.
VerifactuSelf-employedFAQ - 11 min read
Verifactu in ecommerce: how not to break the hash chain
If Shopify, Stripe or Amazon generate invoices in your ERP automatically, a bad integration breaks the chained SHA-256 hash chain Verifactu requires. What to audit in each flow before 1 January 2027.
VerifactuEcommerceShopifyStripe - 9 min read
n8n + Holded: 5 workflows that automate invoicing for SMBs
5 real n8n workflows with our open-source n8n-nodes-holded node: Shopify to invoice, Stripe to contact plus invoice, Calendly to CRM, HubSpot deal won to proforma, Asana delivery to invoicing. Diagrams and production considerations included.
n8nHoldedAutomationWorkflows