April 2017
Intermediate to advanced
266 pages
7h 4m
English
Content preview from Building Blockchain Projects
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Pricing
The first Oraclize query call coming from any Ethereum address is completely free of charge. Oraclize calls are free when used on testnets! This works for moderate usage in test environments only.
From the second call onward, you have to pay in ether for queries. While sending a query to Oraclize (that is, while making an internal transaction call), a fee is deducted by transferring ether from the calling contract to the Oraclize contract. The amount of ether to deduct depends on the data source and proof type.
Here is a table that shows the number of ether that is deducted while sending a query:
| Data source | Without proof | With TLSNotary proof |
| URL | $0.01 | $0.05 |
| Blockchain | $0.01 | $0.05 |
| WolframAlpha | $0.03 | $0.03 |
| IPFS | $0.01 | $0.01 ... |
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