diff --git a/packages/lexicon/CHANGELOG.md b/packages/lexicon/CHANGELOG.md
index 83eda5f90..b57d29713 100644
--- a/packages/lexicon/CHANGELOG.md
+++ b/packages/lexicon/CHANGELOG.md
@@ -1,5 +1,11 @@
 # lexicon
 
+## 2.1.0
+
+### Minor Changes
+
+- e453f6a: Support webhook_response in step:complete event when data available in results
+
 ## 2.0.0
 
 ### Major Changes
diff --git a/packages/lexicon/lightning.d.ts b/packages/lexicon/lightning.d.ts
index 81d9ac5d3..bab1bdc9a 100644
--- a/packages/lexicon/lightning.d.ts
+++ b/packages/lexicon/lightning.d.ts
@@ -209,6 +209,11 @@ export type StepStartPayload = {
 };
 export type StepStartReply = void;
 
+export type WebhookResponse = {
+  status?: number;
+  body?: Record<string, any> | any[];
+};
+
 export type StepCompletePayload = ExitReason & {
   run_id?: string;
   job_id: string;
@@ -223,6 +228,7 @@ export type StepCompletePayload = ExitReason & {
   };
   duration: number;
   timestamp: TimeInMicroSeconds;
+  webhook_response?: WebhookResponse;
 };
 export type StepCompleteReply = void;
 
diff --git a/packages/lexicon/package.json b/packages/lexicon/package.json
index 3b51706dd..584542294 100644
--- a/packages/lexicon/package.json
+++ b/packages/lexicon/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@openfn/lexicon",
-  "version": "2.0.0",
+  "version": "2.1.0",
   "description": "Central repo of names and type definitions",
   "author": "Open Function Group <admin@openfn.org>",
   "license": "ISC",
diff --git a/packages/ws-worker/CHANGELOG.md b/packages/ws-worker/CHANGELOG.md
index 6bae7c6ab..74ec4d793 100644
--- a/packages/ws-worker/CHANGELOG.md
+++ b/packages/ws-worker/CHANGELOG.md
@@ -1,5 +1,16 @@
 # ws-worker
 
+## 1.25.0
+
+### Minor Changes
+
+- e453f6a: Support webhook_response in step:complete event when data available in results
+
+### Patch Changes
+
+- Updated dependencies [e453f6a]
+  - @openfn/lexicon@2.1.0
+
 ## 1.24.2
 
 ### Patch Changes
diff --git a/packages/ws-worker/package.json b/packages/ws-worker/package.json
index 53f331221..8d47201c2 100644
--- a/packages/ws-worker/package.json
+++ b/packages/ws-worker/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@openfn/ws-worker",
-  "version": "1.24.2",
+  "version": "1.25.0",
   "description": "A Websocket Worker to connect Lightning to a Runtime Engine",
   "main": "dist/index.js",
   "type": "module",
diff --git a/packages/ws-worker/src/events/step-complete.ts b/packages/ws-worker/src/events/step-complete.ts
index 4c0640f87..88eaa15da 100644
--- a/packages/ws-worker/src/events/step-complete.ts
+++ b/packages/ws-worker/src/events/step-complete.ts
@@ -52,6 +52,14 @@ export default async function onStepComplete(
     timestamp: timeInMicroseconds(event.time),
   } as StepCompletePayload;
 
+  // Feed through the webhook response if it's on state
+  // We do this on the event so that Lightning
+  // doesn't have the parse the dataclip
+  // (which may not be sent in zero persistence mode!)
+  if (outputState.webhookResponse) {
+    evt.webhook_response = outputState.webhookResponse;
+  }
+
   if (event.redacted) {
     state.withheldDataclips[dataclipId] = true;
     evt.output_dataclip_error = 'DATACLIP_TOO_LARGE';
diff --git a/packages/ws-worker/test/events/step-complete.test.ts b/packages/ws-worker/test/events/step-complete.test.ts
index 7a74f872d..a80e7a217 100644
--- a/packages/ws-worker/test/events/step-complete.test.ts
+++ b/packages/ws-worker/test/events/step-complete.test.ts
@@ -365,6 +365,262 @@ test('accumulate multiple leaf dataclips for branching workflow', async (t) => {
   t.not(state.leafDataclipIds[0], state.leafDataclipIds[1]);
 });
 
+test('includes webhook_response in step:complete payload when webhookResponse is set on state', async (t) => {
+  const plan = createPlan();
+  const jobId = 'job-1';
+
+  const state = createRunState(plan);
+  state.activeJob = jobId;
+  state.activeStep = 'b';
+
+  let lightningEvent: any;
+  const channel = mockChannel({
+    [STEP_COMPLETE]: (evt) => {
+      lightningEvent = evt;
+    },
+  });
+
+  const event = {
+    state: { x: 10, webhookResponse: { status: 201, body: { ok: true } } },
+  } as any;
+  await handleStepComplete({ channel, state } as any, event);
+
+  t.deepEqual(lightningEvent.webhook_response, {
+    status: 201,
+    body: { ok: true },
+  });
+});
+
+test('includes webhook_response in step:complete payload when webhookResponse is set on state (status only)', async (t) => {
+  const plan = createPlan();
+  const jobId = 'job-1';
+
+  const state = createRunState(plan);
+  state.activeJob = jobId;
+  state.activeStep = 'b';
+
+  let lightningEvent: any;
+  const channel = mockChannel({
+    [STEP_COMPLETE]: (evt) => {
+      lightningEvent = evt;
+    },
+  });
+
+  const event = {
+    state: { x: 10, webhookResponse: { status: 201 } },
+  } as any;
+  await handleStepComplete({ channel, state } as any, event);
+
+  t.deepEqual(lightningEvent.webhook_response, {
+    status: 201,
+  });
+});
+
+test('includes webhook_response in step:complete payload when webhookResponse is set on state (body only)', async (t) => {
+  const plan = createPlan();
+  const jobId = 'job-1';
+
+  const state = createRunState(plan);
+  state.activeJob = jobId;
+  state.activeStep = 'b';
+
+  let lightningEvent: any;
+  const channel = mockChannel({
+    [STEP_COMPLETE]: (evt) => {
+      lightningEvent = evt;
+    },
+  });
+
+  const event = {
+    state: { x: 10, webhookResponse: { body: { ok: true } } },
+  } as any;
+  await handleStepComplete({ channel, state } as any, event);
+
+  t.deepEqual(lightningEvent.webhook_response, {
+    body: { ok: true },
+  });
+});
+
+test('includes webhook_response in step:complete payload when webhookResponse is set on state (no keys)', async (t) => {
+  const plan = createPlan();
+  const jobId = 'job-1';
+
+  const state = createRunState(plan);
+  state.activeJob = jobId;
+  state.activeStep = 'b';
+
+  let lightningEvent: any;
+  const channel = mockChannel({
+    [STEP_COMPLETE]: (evt) => {
+      lightningEvent = evt;
+    },
+  });
+
+  const event = {
+    state: { x: 10, webhookResponse: {} },
+  } as any;
+  await handleStepComplete({ channel, state } as any, event);
+
+  t.deepEqual(lightningEvent.webhook_response, {});
+});
+
+test('omits webhook_response from payload when webhookResponse is not set on state', async (t) => {
+  const plan = createPlan();
+  const jobId = 'job-1';
+
+  const state = createRunState(plan);
+  state.activeJob = jobId;
+  state.activeStep = 'b';
+
+  let lightningEvent: any;
+  const channel = mockChannel({
+    [STEP_COMPLETE]: (evt) => {
+      lightningEvent = evt;
+    },
+  });
+
+  const event = { state: { x: 10 } } as any;
+  await handleStepComplete({ channel, state } as any, event);
+
+  t.is(lightningEvent.webhook_response, undefined);
+});
+
+test('webhookResponse is included in dataclip', async (t) => {
+  const plan = createPlan();
+  const jobId = 'job-1';
+
+  const state = createRunState(plan);
+  state.activeJob = jobId;
+  state.activeStep = 'b';
+
+  const channel = mockChannel({
+    [STEP_COMPLETE]: () => true,
+  });
+
+  const event = {
+    state: { x: 10, webhookResponse: { status: 201, body: {} } },
+  } as any;
+  await handleStepComplete({ channel, state } as any, event);
+
+  const [dataclip] = Object.values(state.dataclips);
+  t.deepEqual(dataclip, { x: 10, webhookResponse: { status: 201, body: {} } });
+});
+
+test('webhookResponse included in the serialized output_dataclip sent to Lightning', async (t) => {
+  const plan = createPlan();
+  const jobId = 'job-1';
+
+  const state = createRunState(plan);
+  state.activeJob = jobId;
+  state.activeStep = 'b';
+
+  let lightningEvent: any;
+  const channel = mockChannel({
+    [STEP_COMPLETE]: (evt) => {
+      lightningEvent = evt;
+    },
+  });
+
+  const event = {
+    state: { x: 10, webhookResponse: { status: 201, body: {} } },
+  } as any;
+  await handleStepComplete({ channel, state } as any, event);
+
+  t.deepEqual(JSON.parse(lightningEvent.output_dataclip), {
+    x: 10,
+    webhookResponse: { status: 201, body: {} },
+  });
+});
+
+test('handles webhookResponse with only a body', async (t) => {
+  const plan = createPlan();
+  const jobId = 'job-1';
+
+  const state = createRunState(plan);
+  state.activeJob = jobId;
+  state.activeStep = 'b';
+
+  let lightningEvent: any;
+  const channel = mockChannel({
+    [STEP_COMPLETE]: (evt) => {
+      lightningEvent = evt;
+    },
+  });
+
+  const event = {
+    state: { webhookResponse: { body: { message: 'hello' } } },
+  } as any;
+  await handleStepComplete({ channel, state } as any, event);
+
+  t.deepEqual(lightningEvent.webhook_response, { body: { message: 'hello' } });
+});
+
+test('handles webhookResponse body as a JSON array', async (t) => {
+  const plan = createPlan();
+  const jobId = 'job-1';
+
+  const state = createRunState(plan);
+  state.activeJob = jobId;
+  state.activeStep = 'b';
+
+  let lightningEvent: any;
+  const channel = mockChannel({
+    [STEP_COMPLETE]: (evt) => {
+      lightningEvent = evt;
+    },
+  });
+
+  const event = {
+    state: { webhookResponse: { status: 200, body: [{ id: 1 }, { id: 2 }] } },
+  } as any;
+  await handleStepComplete({ channel, state } as any, event);
+
+  t.deepEqual(lightningEvent.webhook_response, {
+    status: 200,
+    body: [{ id: 1 }, { id: 2 }],
+  });
+});
+
+test('does nothing with webhookResponse when event.state is empty', async (t) => {
+  const plan = createPlan();
+  const jobId = 'job-1';
+
+  const state = createRunState(plan);
+  state.activeJob = jobId;
+  state.activeStep = 'b';
+
+  let lightningEvent: any;
+  const channel = mockChannel({
+    [STEP_COMPLETE]: (evt) => {
+      lightningEvent = evt;
+    },
+  });
+
+  await handleStepComplete({ channel, state } as any, { state: {} } as any);
+  t.is(lightningEvent.webhook_response, undefined);
+});
+
+test('does nothing with webhookResponse when event.state is undefined', async (t) => {
+  const plan = createPlan();
+  const jobId = 'job-1';
+
+  const state = createRunState(plan);
+  state.activeJob = jobId;
+  state.activeStep = 'b';
+
+  let lightningEvent: any;
+  const channel = mockChannel({
+    [STEP_COMPLETE]: (evt) => {
+      lightningEvent = evt;
+    },
+  });
+
+  await t.notThrowsAsync(() =>
+    handleStepComplete({ channel, state } as any, {} as any)
+  );
+  t.is(lightningEvent.webhook_response, undefined);
+});
+
 // Single leaf reached by two paths: start → a → x, start → b → x
 // x executes twice, both times with no downstream
 test('accumulate two leaf dataclips when same node reached by two paths', async (t) => {