Unit Conversion API Pricing
Simple, transparent pricing for developers. Start free, scale as you grow.
View API DocumentationYou'll receive a login link to access your API dashboard after purchase
- 1,000 API requests/month
- 10 requests/minute
- All conversion endpoints
- Community support
- 10,000 API requests/month
- 30 requests/minute
- All conversion endpoints
- Batch conversions
- Email support
- 50,000 API requests/month
- 100 requests/minute
- All conversion endpoints
- Batch conversions
- Priority support
- Usage analytics
- 250,000 API requests/month
- 300 requests/minute
- All conversion endpoints
- Batch conversions
- Priority email support
- Usage analytics
- 99.9% uptime target
- White-label ready — build under your own brand
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What developers build with our API
White-label Products
Build conversion tools under your own brand. Serve your own users through our API — no UnitHarbor branding required. Business plan recommended for production volumes.
App Integrations
Add unit conversion to any app, website, or internal tool with a simple REST call. Works with any programming language or framework.
Automated Workflows
Power bulk data pipelines, exports, and server-to-server conversion tasks at scale. Batch endpoints available on Starter and above.
Why developers choose our API
RESTful API
Simple JSON API with clear documentation. Easy to integrate with any programming language.
Fast Response
Sub-50ms response times with 99.9% uptime target on Business plans.
Secure
HTTPS only, secure API keys, and rate limiting to protect your applications.
Quick Start Example
curl -X GET "https://unitharbor.net/api/v1/convert?value=100&from=km&to=mi" \
-H "Authorization: Bearer YOUR_API_KEY"
# Response:
{
"result": {
"from": "km",
"to": "mi",
"input": 100,
"output": 62.137,
"category": "length"
},
"meta": {
"plan": "pro",
"timestamp": "2024-01-15T10:30:00Z"
}
}