diff --git a/README.md b/README.md
index 9035938..d077462 100644
--- a/README.md
+++ b/README.md
@@ -77,6 +77,7 @@ if (status.status === "verified") {
 // for an existing operator credential.
 await client.createSession({ address: "0x..." });
 await client.createSession({ operator_token: "opc_..." }); // KYC refresh
+await client.createSession({ kind: "sign_in" }); // registration-only: account sign-in, no identity documents
 ```
 
 ### Wallet resolution
diff --git a/package.json b/package.json
index c1c850a..44c2a98 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@agent-score/sdk",
-  "version": "2.7.9",
+  "version": "2.7.10",
   "description": "TypeScript client for the AgentScore APIs",
   "main": "./dist/index.js",
   "module": "./dist/index.mjs",
diff --git a/src/index.ts b/src/index.ts
index 09ade4a..b87b4cd 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -104,6 +104,7 @@ export class AgentScore {
     if (options?.product_name) body.product_name = options.product_name;
     if (options?.address) body.address = options.address;
     if (options?.operator_token) body.operator_token = options.operator_token;
+    if (options?.kind) body.kind = options.kind;
 
     return this.request<SessionCreateResponse>('/v1/sessions', {
       method: 'POST',
diff --git a/src/types.ts b/src/types.ts
index 17bd4f4..7a3c3ed 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -565,6 +565,11 @@ export interface SessionCreateOptions {
   address?: string;
   /** Pre-associate the session with an existing operator credential — e.g. refresh KYC for an `opc_...`. */
   operator_token?: string;
+  /** Session kind. `'kyc'` (the default) runs identity verification; `'sign_in'` is
+   *  registration-only (the buyer signs in with an AgentScore account, no identity documents)
+   *  and mints a `sign_in`-scoped credential, for merchants that key durable state on the
+   *  account without any compliance policy. */
+  kind?: 'kyc' | 'sign_in';
 }
 
 export interface SessionCreateNextSteps {
@@ -581,6 +586,8 @@ export interface SessionCreateResponse {
   verify_url: string;
   poll_url: string;
   expires_at: string;
+  /** The kind the session was minted with; absent on older API responses. */
+  kind?: 'kyc' | 'sign_in';
   /** Structured `next_steps.action: 'deliver_verify_url_and_poll'` with step-by-step
    *  instructions for consuming the session. */
   next_steps?: SessionCreateNextSteps;
diff --git a/tests/index.test.ts b/tests/index.test.ts
index 63432dd..2992940 100644
--- a/tests/index.test.ts
+++ b/tests/index.test.ts
@@ -1296,7 +1296,7 @@ describe('AgentScore.createSession()', () => {
     expect(JSON.parse(call[1].body as string)).toEqual({});
   });
 
-  it('includes context, product_name, address, and operator_token when provided', async () => {
+  it('includes context, product_name, address, operator_token, and kind when provided', async () => {
     mockFetchOk(SESSION_CREATE_RESPONSE);
     const client = new AgentScore({ apiKey: API_KEY });
     await client.createSession({
@@ -1304,6 +1304,7 @@ describe('AgentScore.createSession()', () => {
       product_name: 'Widget',
       address: WALLET,
       operator_token: 'opc_sess',
+      kind: 'sign_in',
     });
     const call = (global.fetch as ReturnType<typeof vi.fn>).mock.calls[0];
     const body = JSON.parse(call[1].body as string) as Record<string, unknown>;
@@ -1311,6 +1312,16 @@ describe('AgentScore.createSession()', () => {
     expect(body.product_name).toBe('Widget');
     expect(body.address).toBe(WALLET);
     expect(body.operator_token).toBe('opc_sess');
+    expect(body.kind).toBe('sign_in');
+  });
+
+  it('omits kind from the body when not provided, so the API applies its default', async () => {
+    mockFetchOk(SESSION_CREATE_RESPONSE);
+    const client = new AgentScore({ apiKey: API_KEY });
+    await client.createSession({ context: 'checkout' });
+    const call = (global.fetch as ReturnType<typeof vi.fn>).mock.calls[0];
+    const body = JSON.parse(call[1].body as string) as Record<string, unknown>;
+    expect('kind' in body).toBe(false);
   });
 });