SaaS API Integration Service — Connect Any Third-Party Service to Your Platform

£997–£4,997

Market Rate: £2,000–£8,000

Your SaaS platform is live but you need to connect it to a third-party service — Stripe, Twilio, HubSpot, OpenAI, Google Workspace, Slack or any other API. We build the integration cleanly, securely and with proper error handling so it works reliably in production.

✅ What’s Included

🔗 Single API Integration — One complete end-to-end integration built, tested and deployed — from connection through to webhook handling and error recovery
🔐 Secure Implementation — API keys stored as environment variables, no hardcoded credentials, proper authentication flow
⚡ Webhook Handling — Incoming webhook processing built with signature verification, retry logic and failure alerting
🔄 Error Handling — Comprehensive error handling — graceful failures, user feedback, admin notifications, automatic retries where appropriate
📋 Documentation — Integration documented with setup guide, environment variable list and operational notes
🧪 Full Testing — Unit tests and integration tests written and passing before deployment
🚀 Deployment — Integration deployed to your production environment and verified working end-to-end
🔧 14-Day Post-Integration Support — Any issues with the integration in the first 14 days resolved at no additional cost
📊 Popular Integrations — Stripe, Twilio, PureSMS, WhatsApp Business, HubSpot, Salesforce, OpenAI, Claude API, Google Workspace, Zapier, Slack, Xero, QuickBooks and more

⏱️ Timeline

3–7 business days depending on integration complexity.

🎯 Who Is This For?

SaaS businesses that need to add a new integration to an existing live platform. Founders who want one specific connection built cleanly without a full rebuild.

📞 020 3951 4908

info@bydesignuk.co.uk · bydesignuk.co.uk · Office 13, 25 Mollison Avenue, Enfield EN3 7LW

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We operate Monday – Friday, 9am – 6pm. Callbacks are typically made within 2 hours during business hours.

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