diff --git a/apps/sim/app/api/workflows/[id]/execute-from-block/route.ts b/apps/sim/app/api/workflows/[id]/execute-from-block/route.ts
index 88b0521f2..647012589 100644
--- a/apps/sim/app/api/workflows/[id]/execute-from-block/route.ts
+++ b/apps/sim/app/api/workflows/[id]/execute-from-block/route.ts
@@ -33,6 +33,7 @@ const ExecuteFromBlockSchema = z.object({
     parallelBlockMapping: z.record(z.any()).optional(),
     activeExecutionPath: z.array(z.string()),
   }),
+  input: z.any().optional(),
 })
 
 export const runtime = 'nodejs'
@@ -71,7 +72,7 @@ export async function POST(req: NextRequest, { params }: { params: Promise<{ id:
       )
     }
 
-    const { startBlockId, sourceSnapshot } = validation.data
+    const { startBlockId, sourceSnapshot, input } = validation.data
     const executionId = uuidv4()
 
     const [workflowRecord] = await db
@@ -122,7 +123,7 @@ export async function POST(req: NextRequest, { params }: { params: Promise<{ id:
           startTime: new Date().toISOString(),
         }
 
-        const snapshot = new ExecutionSnapshot(metadata, {}, {}, {})
+        const snapshot = new ExecutionSnapshot(metadata, {}, input || {}, {})
 
         try {
           const startTime = new Date()
diff --git a/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/hooks/use-workflow-execution.ts b/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/hooks/use-workflow-execution.ts
index 7fd40b775..ec37906fa 100644
--- a/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/hooks/use-workflow-execution.ts
+++ b/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/hooks/use-workflow-execution.ts
@@ -1469,10 +1469,45 @@ export function useWorkflowExecution() {
         activeExecutionPath: [],
       }
 
+      // Extract mock payload for trigger blocks
+      let workflowInput: any
+      if (isTriggerBlock) {
+        const workflowBlocks = useWorkflowStore.getState().blocks
+        const mergedStates = mergeSubblockState(workflowBlocks, workflowId)
+        const candidates = resolveStartCandidates(mergedStates, { execution: 'manual' })
+        const candidate = candidates.find((c) => c.blockId === blockId)
+
+        if (candidate) {
+          if (triggerNeedsMockPayload(candidate)) {
+            workflowInput = extractTriggerMockPayload(candidate)
+            logger.info('Extracted mock payload for trigger block', { blockId, workflowInput })
+          } else if (
+            candidate.path === StartBlockPath.SPLIT_API ||
+            candidate.path === StartBlockPath.SPLIT_INPUT ||
+            candidate.path === StartBlockPath.UNIFIED
+          ) {
+            const inputFormatValue = candidate.block.subBlocks?.inputFormat?.value
+            if (Array.isArray(inputFormatValue)) {
+              const testInput: Record<string, any> = {}
+              inputFormatValue.forEach((field: any) => {
+                if (field && typeof field === 'object' && field.name && field.value !== undefined) {
+                  testInput[field.name] = coerceValue(field.type, field.value)
+                }
+              })
+              if (Object.keys(testInput).length > 0) {
+                workflowInput = testInput
+                logger.info('Extracted test input for trigger block', { blockId, workflowInput })
+              }
+            }
+          }
+        }
+      }
+
       logger.info('Starting run-from-block execution', {
         workflowId,
         startBlockId: blockId,
         isTriggerBlock,
+        hasInput: !!workflowInput,
       })
 
       setIsExecuting(true)
@@ -1487,6 +1522,7 @@ export function useWorkflowExecution() {
           workflowId,
           startBlockId: blockId,
           sourceSnapshot: effectiveSnapshot,
+          input: workflowInput,
           callbacks: {
             onExecutionStarted: (data) => {
               logger.info('Run-from-block execution started:', data)
diff --git a/apps/sim/hooks/use-execution-stream.ts b/apps/sim/hooks/use-execution-stream.ts
index 0273165e4..08ca7164d 100644
--- a/apps/sim/hooks/use-execution-stream.ts
+++ b/apps/sim/hooks/use-execution-stream.ts
@@ -151,6 +151,7 @@ export interface ExecuteFromBlockOptions {
   workflowId: string
   startBlockId: string
   sourceSnapshot: SerializableExecutionState
+  input?: any
   callbacks?: ExecutionStreamCallbacks
 }
 
@@ -222,7 +223,7 @@ export function useExecutionStream() {
   }, [])
 
   const executeFromBlock = useCallback(async (options: ExecuteFromBlockOptions) => {
-    const { workflowId, startBlockId, sourceSnapshot, callbacks = {} } = options
+    const { workflowId, startBlockId, sourceSnapshot, input, callbacks = {} } = options
 
     if (abortControllerRef.current) {
       abortControllerRef.current.abort()
@@ -238,7 +239,7 @@ export function useExecutionStream() {
         headers: {
           'Content-Type': 'application/json',
         },
-        body: JSON.stringify({ startBlockId, sourceSnapshot }),
+        body: JSON.stringify({ startBlockId, sourceSnapshot, input }),
         signal: abortController.signal,
       })