diff --git a/docs/base-chain/flashblocks/api-reference.mdx b/docs/base-chain/flashblocks/api-reference.mdx
index 2ff1577f7..13720e384 100644
--- a/docs/base-chain/flashblocks/api-reference.mdx
+++ b/docs/base-chain/flashblocks/api-reference.mdx
@@ -45,7 +45,12 @@ When called with `"pending"`, returns the current Flashblock — the block activ
 #### Returns
 
 <ResponseField name="result" type="object | null">
-  A block object reflecting the current preconfirmed state. See [eth_getBlockByNumber](/base-chain/reference/json-rpc-api#eth_getblockbynumber) for full field descriptions.
+  A block object reflecting the current preconfirmed state. See [eth_getBlockByNumber](/base-chain/reference/json-rpc-api#eth_getblockbynumber) for full field descriptions. Flashblocks-specific fields:
+
+  - `withdrawals` — Always `[]` for Base (no L2 withdrawals in pending blocks).
+  - `parentBeaconBlockRoot` — Beacon block root passed from the builder; present on all pending blocks.
+  - `requestsHash` — Always the empty requests hash (`0xe3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855`).
+  - `blobGasUsed` — Accurately reflects blob gas consumed by preconfirmed transactions (not zero-padded).
 </ResponseField>
 
 <CodeGroup>
@@ -63,7 +68,12 @@ curl https://sepolia-preconf.base.org \
   "result": {
     "number": "0x1234",
     "hash": "0x...",
-    "transactions": [...]
+    "parentHash": "0x...",
+    "parentBeaconBlockRoot": "0xa4b2c8e1f3d5b7a9c2e4f6d8b0a2c4e6f8d0b2a4c6e8f0d2b4a6c8e0f2d4b6a8",
+    "withdrawals": [],
+    "requestsHash": "0xe3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
+    "blobGasUsed": "0x0",
+    "transactions": ["0x..."]
   }
 }
 ```
@@ -85,6 +95,8 @@ Returns the receipt for a preconfirmed transaction before it is included in a fi
 
 <ResponseField name="result" type="object | null">
   A transaction receipt object for the preconfirmed transaction, or `null` if not found. See [eth_getTransactionReceipt](/base-chain/reference/json-rpc-api#eth_gettransactionreceipt) for full field descriptions.
+
+  - `blobGasUsed` — Accurately reflects blob gas used by the transaction. Previously returned `0x0` for all preconfirmed transactions; now correctly propagated from the Flashblock.
 </ResponseField>
 
 <CodeGroup>
@@ -102,7 +114,8 @@ curl https://sepolia-preconf.base.org \
   "result": {
     "transactionHash": "0x...",
     "blockNumber": "0x1234",
-    "status": "0x1"
+    "status": "0x1",
+    "blobGasUsed": "0x0"
   }
 }
 ```