diff --git a/apps/indexer/README.md b/apps/indexer/README.md
index 3c9031f..b49c392 100644
--- a/apps/indexer/README.md
+++ b/apps/indexer/README.md
@@ -6,6 +6,7 @@ Petra Vault uses the No-Code Indexing (NCI) service from [Geomi](https://geomi.d
 
 - [Setup Instructions](#setup-instructions)
 - [Environment Configuration](#environment-configuration)
+- [Initial-owner Discovery on Mainnet](#initial-owner-discovery-on-mainnet)
 
 ## Setup Instructions
 
@@ -63,3 +64,52 @@ NEXT_PUBLIC_MULTISIG_INDEXER_TESTNET_ENDPOINT="https://api.testnet.aptoslabs.com
 | `NEXT_PUBLIC_MULTISIG_INDEXER_MAINNET_ENDPOINT` | GraphQL endpoint for mainnet  | `https://api.mainnet.aptoslabs.com/nocode/v1/api/[id]/v1/graphql` |
 | `NEXT_PUBLIC_MULTISIG_INDEXER_TESTNET_API_KEY`  | API key for testnet processor | `AG-...`                                                          |
 | `NEXT_PUBLIC_MULTISIG_INDEXER_TESTNET_ENDPOINT` | GraphQL endpoint for testnet  | `https://api.testnet.aptoslabs.com/nocode/v1/api/[id]/v1/graphql` |
+
+## Initial-owner Discovery on Mainnet
+
+`multisig-mainnet.yaml` adds `multisig_creation_candidates` alongside the existing
+transaction and owner-activity tables. It maps argument `0` of
+`0x1::multisig_account::create_with_owners` into a nullable `owners` address array.
+The YAML uses the full framework address because Geomi's editor otherwise drops
+the payload mapping during its function ABI lookup.
+
+The mapping was tested in `multisig-creation-probe-v2` with Mainnet creation
+versions `7345859301` and `7350673760`. Both were returned for the invited owner
+once indexing reached their versions. The production table uses the same mappings
+under the name `multisig_creation_candidates`.
+
+After deploying, indexing the required history, and exposing the new table to the
+mobile API key, query candidate versions for the active wallet:
+
+```graphql
+query VaultCreationCandidates(
+  $owner: String!
+  $afterVersion: bigint! = "0"
+  $limit: Int! = 100
+) {
+  multisig_creation_candidates(
+    where: { owners: { _contains: [$owner] }, version: { _gt: $afterVersion } }
+    order_by: { version: asc }
+    limit: $limit
+  ) {
+    version
+    owners
+  }
+}
+```
+
+For each subsequent page, use the last returned version as `afterVersion` until
+the result is empty. Mobile integration is still required: merge these versions
+with existing creator-history and owner-event discovery, resolve successful
+transactions into vault addresses, deduplicate them, and verify current ownership.
+The query returns creation candidates, not vault addresses or current membership.
+Argument `0` contains additional owners only; it excludes the creator and does
+not cover other creation functions or custom wrappers.
+
+**Deployment remains a separate step.** The processor needs `FeeStatement` events
+to create rows before payload enrichment. This stores a row for every matching
+fee event, including unrelated transactions with null owners and failed creation
+calls. Filtering the GraphQL query does not reduce ingestion. Plan ingestion cost
+and backfill before deployment; the YAML's `starting_version: 0` requests history
+from genesis. The promoted config has been checked locally, but has not been
+deployed or verified using the mobile API key.
diff --git a/apps/indexer/multisig-mainnet.yaml b/apps/indexer/multisig-mainnet.yaml
index 1c535be..4dd2ffb 100644
--- a/apps/indexer/multisig-mainnet.yaml
+++ b/apps/indexer/multisig-mainnet.yaml
@@ -1,22 +1,42 @@
 spec_identifier:
   spec_creator: shepherd@aptoslabs.com
   spec_name: remapping-processor
-  spec_version: 0.0.10
+  spec_version: "0.0.21"
 common_config:
   network: mainnet
   starting_version: 0
   starting_version_override: null
 custom_config:
   transaction_metadata:
-    timestamp: []
+    timestamp:
+      - table: multisig_transactions
+        column: timestamp
     version:
       - table: multisig_transactions
         column: version
       - table: multisig_owner_activities
         column: version
+      - table: multisig_creation_candidates
+        column: version
     epoch: []
     block_height: []
+    hash: []
   events:
+    # Payload mappings enrich event-created rows; they do not filter ingestion.
+    0x1::transaction_fee::FeeStatement:
+      event_fields:
+        $.total_charge_gas_units:
+          - table: multisig_creation_candidates
+            column: total_charge_gas_units
+      event_metadata:
+        sequence_number: []
+        creation_number: []
+        account_address: []
+        event_type:
+          - table: multisig_creation_candidates
+            column: fee_event_type
+        event_index: []
+      constant_values: []
     0x1::multisig_account::AddOwners:
       event_fields:
         $.multisig_account:
@@ -263,11 +283,16 @@ custom_config:
             column: event_type
         event_index: []
       constant_values: []
-  payload: {}
+  payload:
+    # Geomi's function ABI lookup requires the full address.
+    0x0000000000000000000000000000000000000000000000000000000000000001::multisig_account::create_with_owners:
+      '0':
+        - table: multisig_creation_candidates
+          column: owners
   db_schema:
     multisig_transactions:
       version:
-        is_index: false
+        is_index: true
         is_nullable: false
         is_option: false
         is_primary_key: false
@@ -276,6 +301,16 @@ custom_config:
         column_type:
           type: transaction_metadata
           column_type: version
+      timestamp:
+        is_index: false
+        is_nullable: false
+        is_option: false
+        is_primary_key: false
+        is_vec: false
+        default_value: null
+        column_type:
+          type: transaction_metadata
+          column_type: timestamp
       executor:
         is_index: false
         is_nullable: false
@@ -287,15 +322,15 @@ custom_config:
           type: move_type
           column_type: address
       multisig_account:
-        is_index: false
+        is_index: true
         is_nullable: false
         is_option: false
         is_primary_key: true
         is_vec: false
         default_value: null
         column_type:
-          type: event_metadata
-          column_type: account_address
+          type: move_type
+          column_type: address
       num_rejections:
         is_index: false
         is_nullable: true
@@ -348,7 +383,7 @@ custom_config:
           column_type: string
     multisig_owner_activities:
       version:
-        is_index: false
+        is_index: true
         is_nullable: false
         is_option: false
         is_primary_key: true
@@ -365,10 +400,10 @@ custom_config:
         is_vec: false
         default_value: null
         column_type:
-          type: event_metadata
-          column_type: account_address
+          type: move_type
+          column_type: address
       owners_added:
-        is_index: false
+        is_index: true
         is_nullable: true
         is_option: false
         is_primary_key: false
@@ -388,7 +423,7 @@ custom_config:
           type: event_metadata
           column_type: event_type
       owners_removed:
-        is_index: false
+        is_index: true
         is_nullable: true
         is_option: false
         is_primary_key: false
@@ -398,7 +433,7 @@ custom_config:
           type: move_type
           column_type: address
       owner_vote:
-        is_index: false
+        is_index: true
         is_nullable: true
         is_option: false
         is_primary_key: false
@@ -407,3 +442,45 @@ custom_config:
         column_type:
           type: move_type
           column_type: address
+    multisig_creation_candidates:
+      version:
+        is_index: true
+        is_nullable: false
+        is_option: false
+        is_primary_key: true
+        is_vec: false
+        default_value: null
+        column_type:
+          type: transaction_metadata
+          column_type: version
+      fee_event_type:
+        is_index: false
+        is_nullable: false
+        is_option: false
+        is_primary_key: false
+        is_vec: false
+        default_value: null
+        column_type:
+          type: event_metadata
+          column_type: event_type
+      total_charge_gas_units:
+        is_index: false
+        is_nullable: false
+        is_option: false
+        is_primary_key: false
+        is_vec: false
+        default_value: null
+        column_type:
+          type: move_type
+          column_type: u64
+      owners:
+        is_index: true
+        # Unrelated fee rows have no matching payload argument.
+        is_nullable: true
+        is_option: false
+        is_primary_key: false
+        is_vec: true
+        default_value: null
+        column_type:
+          type: move_type
+          column_type: address
diff --git a/apps/indexer/multisig-testnet.yaml b/apps/indexer/multisig-testnet.yaml
index 0fa74d9..d956a6a 100644
--- a/apps/indexer/multisig-testnet.yaml
+++ b/apps/indexer/multisig-testnet.yaml
@@ -1,14 +1,16 @@
 spec_identifier:
   spec_creator: shepherd@aptoslabs.com
   spec_name: remapping-processor
-  spec_version: 0.0.10
+  spec_version: "0.0.21"
 common_config:
   network: testnet
   starting_version: 4500665800
   starting_version_override: null
 custom_config:
   transaction_metadata:
-    timestamp: []
+    timestamp:
+      - table: multisig_transactions
+        column: timestamp
     version:
       - table: multisig_transactions
         column: version
@@ -16,6 +18,7 @@ custom_config:
         column: version
     epoch: []
     block_height: []
+    hash: []
   events:
     0x1::multisig_account::AddOwners:
       event_fields:
@@ -276,6 +279,16 @@ custom_config:
         column_type:
           type: transaction_metadata
           column_type: version
+      timestamp:
+        is_index: false
+        is_nullable: false
+        is_option: false
+        is_primary_key: false
+        is_vec: false
+        default_value: null
+        column_type:
+          type: transaction_metadata
+          column_type: timestamp
       executor:
         is_index: false
         is_nullable: false
@@ -294,8 +307,8 @@ custom_config:
         is_vec: false
         default_value: null
         column_type:
-          type: event_metadata
-          column_type: account_address
+          type: move_type
+          column_type: address
       num_rejections:
         is_index: false
         is_nullable: true
@@ -365,8 +378,8 @@ custom_config:
         is_vec: false
         default_value: null
         column_type:
-          type: event_metadata
-          column_type: account_address
+          type: move_type
+          column_type: address
       owners_added:
         is_index: false
         is_nullable: true