Developer Tools
Hire API Integration Developers — from $500
Your tools should talk to each other — payments to accounting, CRM to email, your app to AI models. Our vetted developers build reliable API integrations with proper authentication, webhooks, retries and error handling, so data flows automatically and nothing falls through the cracks. Verified identities, escrow-protected payments and 0% client fees.
What these experts can do for you
- Payment, CRM, ERP, messaging and marketing platform integrations (Stripe, PayPal, HubSpot, Salesforce and more)
- AI model APIs — OpenAI, Anthropic, Gemini and open-source models wired into your product
- Webhooks, OAuth, authentication, rate limiting and robust error handling
- Documentation, monitoring and handover so your team can maintain the integration
What it costs
Simple
$500–$1,000
8–16h
Medium
$1,500–$3,000
24–40h
Complex
$3,000–$8,000
40–80h
Enterprise
$8,000–$20,000
80–160h
A straightforward single-API connection typically costs $500–$1,000. Multi-endpoint integrations with webhooks run $1,500–$3,000, and complex bi-directional syncs $3,000–$8,000. Enterprise integrations can reach $20,000. Clients pay no platform fee.
See the full pricing guideHow hiring works
Describe your project
Post your requirements in minutes — scope, budget and deadline. It's free and there's no obligation.
Receive quotes from vetted experts
Interested experts send you quotes with their approach and price. Compare profiles, reviews and rates.
Pay through escrow on acceptance
Funds are held in escrow and released only when you accept the delivery. Every project is covered by our 7-day guarantee.
Frequently asked questions
How much does an API integration cost?
Simple single-endpoint connections start at $500–$1,000. Integrations with webhooks and data mapping run $1,500–$3,000, and complex bi-directional syncs range $3,000–$8,000. Fixed quotes before work begins.
Can you integrate a system that has no public API?
Often, yes — via database connections, file exports, browser automation (RPA) or unofficial endpoints where terms allow. Experts will assess feasibility and recommend the most maintainable path.
Who maintains the integration after delivery?
Every delivery includes documentation and a handover session. APIs change over time, so many clients add a monthly maintenance plan covering updates, monitoring and fixes.
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