Connect Every System Your Business Depends On
Stop copying data between tools. Your systems, automatically synced — CRM, payments, databases, AI — from $3K per integration.
Professional API Integration Services
API integration costs $3,000–$25,000 depending on the number and complexity of connections. Payment processing, CRM sync, communication platforms, databases — starting at $3,000 per integration. Every connection includes error handling, retry logic, monitoring, and documentation because third-party APIs go down, and your business can't afford data loss.
Possibility Engineering builds custom API integrations on a global edge network for sub-50ms response times and automatic scaling. Connect Stripe to your accounting system, sync data between Salesforce and your platform, or build a real-time notification pipeline across Slack, email, and SMS — reliable, maintainable integrations built for the real world, not just the happy path.
APIs Connected Every Day
From payment processing to AI inference — the tools and platforms your business depends on, organized by category.
Payment APIs
Stripe, PayPal, Square
- Payment processing and checkout flows
- Subscription billing and recurring revenue
- Refund handling and dispute management
- Webhook event processing and reconciliation
CRM Integration
Salesforce, HubSpot, Pipedrive
- Contact and lead synchronization
- Deal tracking and pipeline automation
- Custom field mapping and data transformation
- Activity logging and event triggers
Communication APIs
Slack, Microsoft Teams, SendGrid, Twilio
- Real-time notifications and alerts
- Email delivery and template management
- SMS and voice messaging
- Chat bots and interactive messages
Database Integration
PostgreSQL, MongoDB, Turso
- Cross-database data synchronization
- ETL pipelines and data transformation
- Read replicas and query optimization
Cloud Storage
Edge Object Storage, AWS S3, Google Cloud Storage
- File upload, download, and streaming
- Image processing and transformation
- Cross-provider storage migration
AI/ML Services
OpenAI, Anthropic, Edge AI
- LLM integration for text generation and analysis
- Embedding generation and semantic search
- Image recognition and classification
- Tool-use and function calling interfaces
How Your Integration Gets Built
A structured process that delivers reliable, maintainable integrations. Every integration handles failures gracefully — because third-party APIs will break, and your systems need to keep running.
Integration Map and Risk Assessment — 1–2 days
Deliverable: a detailed map of every system, API, data format, auth method, rate limit, and SLA involved in your integration. Includes a risk assessment covering failure points, data inconsistencies, and security requirements. This document guides every build decision.
Architecture Blueprint — 1–2 days
Deliverable: data flow diagrams, error handling strategies (circuit breakers, dead letter queues, retry policies), data transformation rules, and a monitoring plan. You approve the architecture before any code is written. The unhappy path gets designed first — failures handled before the success case is optimized.
Working Integration — 1–3 weeks
Deliverable: production-ready integration code with error handling, retry logic with exponential backoff, data validation, and transformation pipelines. Each integration is tested in isolation, then as part of the full data flow. Failure scenarios are simulated: API timeouts, rate limit responses, malformed data, auth failures, and network partitions.
Live Deployment with Monitoring — 1 day
Deliverable: production deployment on a global edge network with real-time monitoring dashboards, failure alerting, and detailed logging. Data accuracy is verified across all connected systems post-launch, followed by a 48-hour stabilization period where every data flow is actively monitored before handoff.
API Integration Pricing
Clear, upfront pricing based on the number and complexity of integrations. Every tier includes error handling, monitoring, and documentation — no hidden fees.
- 1 third-party API integration
- Authentication and credential management
- Retry logic with exponential backoff
- Data validation and transformation
- Monitoring, alerting, and logging
- Integration documentation
- 3–5 business days delivery
- 3–5 API integrations connected
- Custom integration middleware layer
- Data transformation and mapping
- Event-driven architecture with webhooks
- Circuit breakers and dead letter queues
- Load testing and reliability verification
- Centralized monitoring dashboard
- 2–4 weeks delivery
- Unlimited integrations across all systems
- Custom API gateway and routing layer
- Real-time monitoring and observability dashboard
- Data pipeline orchestration
- Compliance and security audit
- SLA with dedicated support engineering
- CI/CD deployment with staging environments
- 1–3 months delivery
Not sure what you need? See the API cost guide or get a free assessment.
API Integration FAQ
Common questions about API integration services. Don't see your question? Reach out for a direct answer.
Connect Your Systems
Tell us which APIs you need to connect. We'll map out the integration architecture and give you a clear, no-surprise quote within 24 hours.