diff --git a/src/application/BrowserEvidence.test.ts b/src/application/BrowserEvidence.test.ts
new file mode 100644
index 0000000000..a48d36a062
--- /dev/null
+++ b/src/application/BrowserEvidence.test.ts
@@ -0,0 +1,112 @@
+import { describe, expect, it } from "vitest";
+
+import { createBrowserEvidence } from "./BrowserEvidence.js";
+import {
+  analyzeWebBundleInputSchema,
+  webBundleAnalysisSchema,
+} from "../domain/webBundleAnalysis.js";
+
+const provider = { id: "fixture", name: "Fixture", version: "1" };
+
+const result = webBundleAnalysisSchema.parse({
+  capture: {
+    target_url: "https://app.example.test/dashboard?token=redacted",
+    target_origin: "https://app.example.test",
+    scripts_observed: 0,
+    scripts_analyzed: 0,
+    source_artifacts: [],
+  },
+  observations: {
+    chunks: { nodes: [], edges: [] },
+    routes: [],
+    endpoints: [],
+    webmcp_declarations: [],
+    source_maps: {
+      status: "not_requested",
+      requested: 0,
+      processed: 0,
+      items: [],
+    },
+  },
+  inferences: [],
+  unknowns: [],
+  completeness: {
+    status: "complete",
+    parsed_scripts: 0,
+    parse_failures: 0,
+    visited_ast_nodes: 0,
+  },
+  limitations: [],
+});
+
+const input = (allowedOrigins: string[]) =>
+  analyzeWebBundleInputSchema.parse({
+    cdp_endpoint: "http://127.0.0.1:9222",
+    target_id: "page-1",
+    observation_ms: 0,
+    allowed_origins: allowedOrigins,
+  });
+
+describe("web bundle Evidence origin scope", () => {
+  it("records the captured target origin when the request uses the default scope", () => {
+    const evidence = createBrowserEvidence(
+      "analyze_web_bundle",
+      input([]),
+      result,
+      provider,
+    );
+
+    expect(evidence.parameters.allowed_origins).toEqual([
+      "https://app.example.test",
+    ]);
+  });
+
+  it("preserves an explicit caller origin scope", () => {
+    const evidence = createBrowserEvidence(
+      "analyze_web_bundle",
+      input(["https://explicit.example.test"]),
+      result,
+      provider,
+    );
+
+    expect(evidence.parameters.allowed_origins).toEqual([
+      "https://explicit.example.test",
+    ]);
+  });
+
+  it("does not infer an origin from a URL without one", () => {
+    const evidence = createBrowserEvidence(
+      "analyze_web_bundle",
+      input([]),
+      webBundleAnalysisSchema.parse({
+        ...result,
+        capture: {
+          ...result.capture,
+          target_url: "file:///tmp/app.html",
+          target_origin: null,
+        },
+      }),
+      provider,
+    );
+
+    expect(evidence.parameters.allowed_origins).toEqual([]);
+  });
+
+  it("does not infer a non-HTTP origin from a bundle URL", () => {
+    const evidence = createBrowserEvidence(
+      "analyze_web_bundle",
+      input([]),
+      webBundleAnalysisSchema.parse({
+        ...result,
+        capture: {
+          ...result.capture,
+          target_url: "ftp://host/app",
+          target_origin: null,
+        },
+      }),
+      provider,
+    );
+
+    expect(evidence.parameters.allowed_origins).toEqual([]);
+  });
+});
diff --git a/src/application/BrowserEvidence.ts b/src/application/BrowserEvidence.ts
index b38c745b41..311d8ac549 100644
--- a/src/application/BrowserEvidence.ts
+++ b/src/application/BrowserEvidence.ts
@@ -198,6 +198,8 @@ const browserResultTargetOrigin = (
     typeof result.inspection.target.origin === "string"
   )
     return result.inspection.target.origin;
+  if ("capture" in result && "target_origin" in result.capture)
+    return result.capture.target_origin ?? undefined;
   if (!("target" in result)) return undefined;
   if ("origin" in result.target) return result.target.origin;
   if ("initial_url" in result.target)
diff --git a/src/domain/browserObservation.test.ts b/src/domain/browserObservation.test.ts
index 2de2a7cd28..ddf03ddad6 100644
--- a/src/domain/browserObservation.test.ts
+++ b/src/domain/browserObservation.test.ts
@@ -4,6 +4,7 @@ import {
   browserEndpointSchema,
   browserObservationEndpointSchema,
   browserOriginSchema,
+  recordedBrowserOriginSchema,
   recordedBrowserObservationEndpointSchema,
   sanitizeEndpointCandidate,
   sanitizeBrowserUrl,
@@ -29,6 +30,20 @@ describe("browser observation contracts", () => {
       expect(browserOriginSchema.safeParse(value).success, value).toBe(false);
   });
 
+  it("accepts only canonical recorded HTTP origins", () => {
+    expect(recordedBrowserOriginSchema.parse("https://app.example.test")).toBe(
+      "https://app.example.test",
+    );
+    for (const value of [
+      "https://%2A.example.com",
+      "https://*.example.com",
+      "https://Example.COM:443",
+    ])
+      expect(recordedBrowserOriginSchema.safeParse(value).success, value).toBe(
+        false,
+      );
+  });
+
   it("accepts only literal loopback HTTP CDP endpoints", () => {
     expect(browserEndpointSchema.parse("http://127.0.0.1:9222")).toBe(
       "http://127.0.0.1:9222",
diff --git a/src/domain/browserObservation.ts b/src/domain/browserObservation.ts
index 2cd5c3b63b..691b68c70a 100644
--- a/src/domain/browserObservation.ts
+++ b/src/domain/browserObservation.ts
@@ -44,6 +44,18 @@ export const browserOriginSchema = z
     return origin;
   });
 
+/** Already-normalized HTTP(S) origin retained in provider output. */
+export const recordedBrowserOriginSchema = z
+  .string()
+  .superRefine((value, context) => {
+    const parsed = browserOriginSchema.safeParse(value);
+    if (parsed.success && parsed.data === value) return;
+    context.addIssue({
+      code: "custom",
+      message: "Expected one canonical HTTP(S) origin",
+    });
+  });
+
 /** Recognize the URL API's bracketed IPv6 form and normalized bare literals. */
 export const isLiteralLoopbackHostname = (hostname: string): boolean =>
   hostname === "127.0.0.1" || hostname === "[::1]" || hostname === "::1";
diff --git a/src/domain/webBundleAnalysis.ts b/src/domain/webBundleAnalysis.ts
index 1cfa2355ff..a48a3bad62 100644
--- a/src/domain/webBundleAnalysis.ts
+++ b/src/domain/webBundleAnalysis.ts
@@ -9,7 +9,10 @@ import {
   optionalBrowserDeadlineMs,
 } from "./browserDeadline.js";
 import { emptyArraySchema } from "./emptyArraySchema.js";
-import { inspectWebPageWithSourceInputSchema } from "./browserObservation.js";
+import {
+  inspectWebPageWithSourceInputSchema,
+  recordedBrowserOriginSchema,
+} from "./browserObservation.js";
 import {
   webTextArtifactMetadataSchema,
   webTextArtifactSchema,
@@ -366,6 +369,9 @@ export const webBundleAnalysisSchema = z.object({
   route_inventory: javaScriptRouteInventorySchema.exactOptional(),
   capture: z.object({
     target_url: z.string(),
+    // Older saved observations omit this field; current analyses retain the
+    // validated HTTP(S) target origin or null when no browser origin exists.
+    target_origin: recordedBrowserOriginSchema.nullable().optional(),
     scripts_observed: z.int().min(0),
     scripts_analyzed: z.int().min(0),
     source_artifacts: z.array(webTextArtifactSummarySchema),
diff --git a/src/domain/webBundleAnalyzer.test.ts b/src/domain/webBundleAnalyzer.test.ts
index 8f4104d080..cbd1cf6424 100644
--- a/src/domain/webBundleAnalyzer.test.ts
+++ b/src/domain/webBundleAnalyzer.test.ts
@@ -1100,6 +1100,17 @@ describe("web bundle configuration and navigation parity", () => {
 });
 
 describe("web bundle artifact metadata", () => {
+  it("retains only a validated HTTP target origin", () => {
+    expect(
+      analyzeCapturedWebBundle(inspection("export {};")).capture.target_origin,
+    ).toBe(origin);
+
+    const nonHttp = inspection("export {};");
+    nonHttp.target.url = "ftp://host/app";
+    nonHttp.target.origin = "ftp://host";
+    expect(analyzeCapturedWebBundle(nonHttp).capture.target_origin).toBeNull();
+  });
+
   it("preserves long provider media types in artifact summaries", () => {
     const result = analyzeCapturedWebBundle(inspection("export {};"));
     const mediaType = `application/${"x".repeat(300)}`;
diff --git a/src/domain/webBundleAnalyzerResult.ts b/src/domain/webBundleAnalyzerResult.ts
index 2091073cd2..9d7c403c7c 100644
--- a/src/domain/webBundleAnalyzerResult.ts
+++ b/src/domain/webBundleAnalyzerResult.ts
@@ -2,6 +2,7 @@ import { buildJavaScriptRouteInventorySteps } from "./javascript/javascriptRoute
 import { completeSemanticSteps } from "./javascript/javascriptSemanticTraversal.js";
 import { RETURNED_REFERENCE_WIDENING_LIMITATION } from "./javascript/javascriptSemanticCoverage.js";
 import type { WebPageInspection } from "./browserObservationSchemas.js";
+import { browserOriginSchema } from "./browserObservation.js";
 import {
   webBundleAnalysisSchema,
   type WebBundleAnalysis,
@@ -231,15 +232,19 @@ const buildCaptureObservation = (
   inspection: WebPageInspection,
   sourceScripts: IncludedScript[],
   attemptedScripts: number,
-) => ({
-  target_url: inspection.target.url,
-  scripts_observed: inspection.scripts.total,
-  // This preserves the historical meaning: source scripts submitted for
-  // analysis, including worker/deadline failures; explicitly unstarted suffixes
-  // are excluded. Successfully parsed scripts are counted separately below.
-  scripts_analyzed: attemptedScripts,
-  source_artifacts: sourceScripts.map(sourceArtifact),
-});
+) => {
+  const targetOrigin = browserOriginSchema.safeParse(inspection.target.origin);
+  return {
+    target_url: inspection.target.url,
+    target_origin: targetOrigin.success ? targetOrigin.data : null,
+    scripts_observed: inspection.scripts.total,
+    // This preserves the historical meaning: source scripts submitted for
+    // analysis, including worker/deadline failures; explicitly unstarted suffixes
+    // are excluded. Successfully parsed scripts are counted separately below.
+    scripts_analyzed: attemptedScripts,
+    source_artifacts: sourceScripts.map(sourceArtifact),
+  };
+};
 
 const sourceArtifact = (script: IncludedScript) => {
   if (!script.source.included) throw new TypeError("Filtered source changed");