As of April 15, 2023 the Bletchley Index Series (all indexes shown below) have been decommissioned. No new price or return data will be produced. The full decommission of the Bletchley Index website, including all historical data, will occur on September 1, 2023. 

Suitable replacements for the Bletchley Index Series can be found on Coin Metrics’ Community API or through CMBI offerings. Where Coin Metrics has found suitable replacements it is listed alongside the index in the table below. For indexes where there is no suitable replacement, you can find more information at

Table 1: Indices Decommissioned on April 15, 2023

Please contact us at for any comments or questions.