diff --git a/queries/risczero_verification_base.sql b/queries/risczero_verification_base.sql
new file mode 100644
index 0000000..aa46e08
--- /dev/null
+++ b/queries/risczero_verification_base.sql
@@ -0,0 +1,40 @@
+-- part of a query repo
+-- query name: RiscZero verification base
+-- query link: https://dune.com/queries/tbd
+
+with eth_gas_price as (
+    SELECT DATE_TRUNC('day', tx.block_time) AS day
+       , APPROX_PERCENTILE(tx.gas_price / 1e18, 0.5) AS median_legacy_gas_price
+       , APPROX_PERCENTILE( (b.base_fee_per_gas + tx.priority_fee_per_gas) / 1e18, 0.5) AS median_dynamic_gas_price
+    from ethereum.transactions tx
+    INNER JOIN ethereum.blocks b ON tx.block_number = b.number
+    group by 1
+)
+, eth_usd_price as (
+    select date_trunc('day', minute) as day
+    , avg(price) as avg_eth_price
+    from prices.usd
+    where blockchain is null and symbol = 'ETH'
+    group by 1
+)
+
+select tr.block_date 
+    , count(distinct tx_hash) as verifying_calls
+    , sum(case when tx.type = 'DynamicFee' then cast(tr.gas_used as double) * median_dynamic_gas_price -- dynamic 
+        else cast(tr.gas_used as double) * median_legacy_gas_price -- legacy
+    end) as verifying_cost_ETH
+    , sum(case when tx.type = 'DynamicFee' then cast(tr.gas_used as double) * median_dynamic_gas_price * avg_eth_price -- dynamic 
+        else cast(tr.gas_used as double) * median_legacy_gas_price * avg_eth_price -- legacy
+    end) as verifying_cost_usd
+from
+ethereum.traces tr
+left join ethereum.transactions tx on tr.block_number = tx.block_number and tr.tx_hash = tx.hash
+left join eth_usd_price ep on tr.block_date = ep.day
+left join eth_gas_price gp on tr.block_date = gp.day
+where
+    tr.to = 0x8EaB2D97Dfce405A1692a21b3ff3A172d593D319 -- RiscZeroVerifierRouter
+    and tr.call_type = 'staticcall'
+    and bytearray_substring (tr.input, 1, 4) = 0xab750e75 -- verify
+    and tr.block_number > 20079231 -- RiscZeroVerifierRouter deployed at block 20079232
+group by
+  1
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