diff --git a/changelog.d/features/11340-web-session-contract.md b/changelog.d/features/11340-web-session-contract.md
new file mode 100644
index 0000000000..33ee58cf9b
--- /dev/null
+++ b/changelog.d/features/11340-web-session-contract.md
@@ -0,0 +1 @@
+- **feat(providers):** publish a management-authenticated versioned web-session credential contract from OmniRoute's canonical browser credential metadata ([#11340](https://github.com/diegosouzapw/OmniRoute/pull/11340)) — thanks @Zartharas
diff --git a/src/app/api/providers/web-session-contract/route.ts b/src/app/api/providers/web-session-contract/route.ts
new file mode 100644
index 0000000000..aaa0754d51
--- /dev/null
+++ b/src/app/api/providers/web-session-contract/route.ts
@@ -0,0 +1,10 @@
+import { NextResponse } from "next/server";
+import { requireManagementAuth } from "@/lib/api/requireManagementAuth";
+import { buildWebSessionContract } from "@/lib/providers/webSessionContract";
+
+export async function GET(request: Request) {
+  const authError = await requireManagementAuth(request);
+  if (authError) return authError;
+
+  return NextResponse.json(buildWebSessionContract());
+}
diff --git a/src/lib/providers/webSessionContract.ts b/src/lib/providers/webSessionContract.ts
new file mode 100644
index 0000000000..58ee726f5b
--- /dev/null
+++ b/src/lib/providers/webSessionContract.ts
@@ -0,0 +1,58 @@
+import {
+  listExtractionConfigs,
+  type TokenSource,
+} from "@omniroute/open-sse/services/tokenExtractionConfig.ts";
+import { getWebSessionCredentialRequirement } from "@/shared/providers/webSessionCredentials";
+
+export const WEB_SESSION_CONTRACT_VERSION = 1;
+
+export interface WebSessionContractProvider {
+  providerId: string;
+  displayName: string;
+  loginUrl: string;
+  homeUrl: string;
+  tokenSources: TokenSource[];
+  credential: {
+    kind: "cookie" | "token";
+    storageKeys: string[];
+    acceptsFullCookieHeader: boolean;
+  };
+}
+
+export interface WebSessionContract {
+  version: typeof WEB_SESSION_CONTRACT_VERSION;
+  providers: WebSessionContractProvider[];
+}
+
+/**
+ * Publish only the canonical, non-secret metadata needed by external
+ * credential brokers to capture credentials in the same shape OmniRoute
+ * accepts. Provider instructions, polling state, and credential values are
+ * intentionally excluded.
+ */
+export function buildWebSessionContract(): WebSessionContract {
+  const providers = listExtractionConfigs().flatMap<WebSessionContractProvider>((config) => {
+    const requirement = getWebSessionCredentialRequirement(config.providerId);
+    if (!requirement || requirement.kind === "none") return [];
+
+    return [
+      {
+        providerId: config.providerId,
+        displayName: config.displayName,
+        loginUrl: config.loginUrl,
+        homeUrl: config.homeUrl,
+        tokenSources: config.tokenSources.map((source) => ({ ...source })),
+        credential: {
+          kind: requirement.kind,
+          storageKeys: [...requirement.storageKeys],
+          acceptsFullCookieHeader: requirement.acceptsFullCookieHeader,
+        },
+      },
+    ];
+  });
+
+  return {
+    version: WEB_SESSION_CONTRACT_VERSION,
+    providers,
+  };
+}
diff --git a/tests/unit/web-session-contract.test.ts b/tests/unit/web-session-contract.test.ts
new file mode 100644
index 0000000000..7c43e441a4
--- /dev/null
+++ b/tests/unit/web-session-contract.test.ts
@@ -0,0 +1,99 @@
+import assert from "node:assert/strict";
+import { readFileSync } from "node:fs";
+import test from "node:test";
+
+import { listExtractionConfigs } from "../../open-sse/services/tokenExtractionConfig.ts";
+import {
+  buildWebSessionContract,
+  WEB_SESSION_CONTRACT_VERSION,
+} from "../../src/lib/providers/webSessionContract.ts";
+import { getWebSessionCredentialRequirement } from "../../src/shared/providers/webSessionCredentials.ts";
+
+test("web-session contract mirrors canonical extraction and credential metadata", () => {
+  const contract = buildWebSessionContract();
+  assert.equal(contract.version, WEB_SESSION_CONTRACT_VERSION);
+
+  const expected = listExtractionConfigs().flatMap((config) => {
+    const requirement = getWebSessionCredentialRequirement(config.providerId);
+    return requirement && requirement.kind !== "none" ? [{ config, requirement }] : [];
+  });
+
+  assert.equal(contract.providers.length, expected.length);
+  assert.equal(
+    new Set(contract.providers.map((provider) => provider.providerId)).size,
+    expected.length
+  );
+
+  for (const { config, requirement } of expected) {
+    const published = contract.providers.find(
+      (provider) => provider.providerId === config.providerId
+    );
+    assert.ok(published, `${config.providerId} must be published`);
+    assert.equal(published.displayName, config.displayName);
+    assert.equal(published.loginUrl, config.loginUrl);
+    assert.equal(published.homeUrl, config.homeUrl);
+    assert.deepEqual(published.tokenSources, config.tokenSources);
+    assert.equal(published.credential.kind, requirement.kind);
+    assert.deepEqual(published.credential.storageKeys, [...requirement.storageKeys]);
+    assert.equal(published.credential.acceptsFullCookieHeader, requirement.acceptsFullCookieHeader);
+  }
+});
+
+test("web-session contract preserves representative token and cookie semantics", () => {
+  const providers = new Map(
+    buildWebSessionContract().providers.map((provider) => [provider.providerId, provider])
+  );
+
+  assert.equal(providers.get("deepseek-web")?.credential.kind, "token");
+  assert.equal(providers.get("zai-web")?.credential.kind, "token");
+  assert.equal(providers.get("gemini-web")?.credential.kind, "cookie");
+  assert.equal(providers.get("qwen-web")?.credential.kind, "cookie");
+
+  assert.ok(
+    providers
+      .get("deepseek-web")
+      ?.tokenSources.some((source) => source.type === "localStorage" && source.key === "userToken")
+  );
+  assert.ok(
+    providers
+      .get("gemini-web")
+      ?.tokenSources.some(
+        (source) =>
+          source.type === "cookie" &&
+          source.name === "__Secure-1PSID" &&
+          source.domain === ".google.com"
+      )
+  );
+});
+
+test("web-session contract excludes credential values and operator-only guidance", () => {
+  const serialized = JSON.stringify(buildWebSessionContract());
+
+  for (const forbidden of [
+    "placeholder",
+    "instructions",
+    "pollingConfig",
+    "credentialName",
+    "guideSteps",
+    "guideNote",
+  ]) {
+    assert.equal(
+      serialized.includes(`\"${forbidden}\"`),
+      false,
+      `${forbidden} must not be published`
+    );
+  }
+});
+
+test("web-session contract route remains management-authenticated", () => {
+  const source = readFileSync(
+    new URL("../../src/app/api/providers/web-session-contract/route.ts", import.meta.url),
+    "utf8"
+  );
+
+  const authCall = source.indexOf("requireManagementAuth(request)");
+  const responseCall = source.indexOf("NextResponse.json(buildWebSessionContract())");
+
+  assert.ok(authCall >= 0, "route must require management authentication");
+  assert.ok(responseCall > authCall, "authentication must run before contract publication");
+});