Custom API Integration & Multi-Platform Sync
TL;DR: Your CRM is only as good as the data flowing into it. I build custom API integrations that connect your CRM with every tool in your stack — payments, forms, analytics, databases, and SaaS platforms. Real-time and scheduled syncing, webhook receivers, two-way data flow with conflict resolution, and custom middleware for systems that refuse to cooperate. Data moves automatically and nothing gets lost.
What I Build
For businesses running multiple tools that do not talk to each other — and tired of copy-pasting between tabs.
Custom API Connectors
Custom connectors for CRMs without native integrations. REST API, GraphQL, SOAP, and webhook-based connections with OAuth, API key, and token-based authentication. Works with HubSpot, Pipedrive, Zoho, GoHighLevel, Salesforce, Close, Monday, Copper, and any platform with an API.
Real-Time & Scheduled Data Sync
Two-way data syncing between your CRM and databases, SaaS tools, and internal systems. Conflict resolution, deduplication, and validation ensure clean data. Hybrid approach — real-time webhooks for critical events, scheduled sync for bulk operations.
Webhook Receivers & Data Processing
Custom webhook endpoints that receive data from external platforms, transform it, validate it, and route it to the right system. Handles form submissions, payment events, scheduling updates, and any inbound data stream.
Legacy System & Browser Automation
Systems without APIs? I connect legacy tools using database connections, browser automation, file-based integrations, or custom middleware. If data exists in a system, I can get it out and route it where it needs to go.
Technical Capabilities
- REST & GraphQL APIs — full CRUD operations with authentication
- Webhooks — real-time event processing and custom endpoints
- Data Transformation — mapping, validation, deduplication, and formatting
- Rate Limiting — queue management, pagination, and retry logic
- Database Connections — PostgreSQL, MySQL, Supabase, Airtable, and MongoDB
- Error Handling — logging, monitoring, alerting, and rollback
How the Project Works
Integration Architecture & Data Mapping
I review all platforms, map data fields between them, and design the integration architecture including sync direction, frequency, and conflict resolution rules.
API Connection & Authentication Setup
I establish API connections, configure authentication (OAuth, API keys, tokens), and verify access to required endpoints on all platforms.
Sync Logic & Workflow Build
I build the sync workflows — data mapping, transformation, deduplication, validation, and routing logic between all connected platforms.
Error Handling & Monitoring
I add retry mechanisms, rate limit handling, pagination for large datasets, logging, and alerting for failed operations.
Testing, Validation & Handoff
I test all integrations with real data, validate data integrity across platforms, and deliver documentation with architecture diagrams. 30 days of post-delivery support included.
Investment
I quote a fixed price after a free discovery call. No hourly billing, no budget overruns.
Starter
From $3,500
1 API connection between 2 platforms, one-way sync, authentication, error handling, and documentation.
Standard
From $9,000
Up to 3 API integrations, two-way sync with conflict resolution, webhook receivers, and full documentation.
Advanced
From $18,000
Up to 6 API integrations, complex data routing, middleware layer, data migration, monitoring, and team training.
Frequently Asked Questions
What CRMs and platforms can you integrate?
Can you connect tools that do not have native integrations?
How do you handle data conflicts in two-way sync?
What about rate limits and API restrictions?
Can you build a custom API for my internal tool?
Let's Connect Your Systems
Book a free call. I'll map out your data flows, design the integration, and get you a fixed quote within 48 hours.