UnifyUnitsDevelopers

Rate limits

Burst rate limits only. Each authenticated plan selects a Cloudflare rate-limit binding that caps requests per 60-second window. Monthly conversion quotas and paid billing are not enforced in the current API release.

Plans

Free
100 req / 60 s
Batch max 100 items
Developer
500 req / 60 s
Batch max 100 items
Pro
2,000 req / 60 s
Batch max 100 items

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What counts

OperationCost
Authenticated convert or batch HTTP request1 request
Batch with many items (within the item cap)1 request
Public discoveryNot rate-limited by plan

When the burst limit is exceeded, the API returnsRATE_LIMIT_EXCEEDED withRetry-After: 60.