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chore: update protocol refs to 2026-01-23
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Lines changed: 73 additions & 73 deletions

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‎a2a/SKILLS.md‎

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@@ -86,7 +86,7 @@ UCP_PAYMENT_DATA_KEY = "a2a.ucp.checkout.payment_data"
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UCP_RISK_SIGNALS_KEY = "a2a.ucp.checkout.risk_signals"
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# Extension constants
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A2A_UCP_EXTENSION_URL = "https://ucp.dev/specification/reference?v=2026-01-11"
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A2A_UCP_EXTENSION_URL = "https://ucp.dev/specification/reference?v=2026-01-23"
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UCP_AGENT_HEADER = "UCP-Agent" # HTTP header for client profile
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```
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‎a2a/business_agent/src/business_agent/constants.py‎

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@@ -20,7 +20,7 @@
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ADK_EXTENSIONS_STATE_KEY = "__session_extensions__"
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ADK_LATEST_TOOL_RESULT = "temp:LATEST_TOOL_RESULT"
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A2A_UCP_EXTENSION_URL = "https://ucp.dev/specification/reference?v=2026-01-11"
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A2A_UCP_EXTENSION_URL = "https://ucp.dev/specification/reference?v=2026-01-23"
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UCP_AGENT_HEADER = "UCP-Agent"
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UCP_FULFILLMENT_EXTENSION = "dev.ucp.shopping.fulfillment"

‎a2a/business_agent/src/business_agent/data/agent_card.json‎

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@@ -4,25 +4,25 @@
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{
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"description": "UCP Extension",
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"required": true,
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"uri": "https://ucp.dev/specification/reference?v=2026-01-11",
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"uri": "https://ucp.dev/specification/reference?v=2026-01-23",
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"params": {
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"capabilities": [
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{
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"name": "dev.ucp.shopping.checkout",
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"version": "2026-01-11",
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"version": "2026-01-23",
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"spec": "https://ucp.dev/specs/shopping/checkout",
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"schema": "https://ucp.dev/schemas/shopping/checkout.json"
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},
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{
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"name": "dev.ucp.shopping.fulfillment",
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"version": "2026-01-11",
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"version": "2026-01-23",
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"spec": "https://ucp.dev/specs/shopping/fulfillment",
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"schema": "https://ucp.dev/schemas/shopping/fulfillment.json",
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"extends": "dev.ucp.shopping.checkout"
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},
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{
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"name": "dev.ucp.shopping.discount",
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"version": "2026-01-11",
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"version": "2026-01-23",
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"spec": "https://ucp.dev/specs/shopping/discount",
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"schema": "https://ucp.dev/schemas/shopping/discount.json",
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"extends": "dev.ucp.shopping.checkout"

‎a2a/business_agent/src/business_agent/data/ucp.json‎

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@@ -1,9 +1,9 @@
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{
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"ucp": {
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"version": "2026-01-11",
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"version": "2026-01-23",
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"services": {
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"dev.ucp.shopping": {
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"version": "2026-01-11",
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"version": "2026-01-23",
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"spec": "https://ucp.dev/specs/shopping",
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"a2a": {
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"endpoint": "http://localhost:10999/.well-known/agent-card.json"
@@ -13,13 +13,13 @@
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"capabilities": [
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{
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"name": "dev.ucp.shopping.checkout",
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"version": "2026-01-11",
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"version": "2026-01-23",
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"spec": "https://ucp.dev/specs/shopping/checkout",
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"schema": "https://ucp.dev/schemas/shopping/checkout.json"
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},
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{
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"name": "dev.ucp.shopping.fulfillment",
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"version": "2026-01-11",
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"version": "2026-01-23",
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"spec": "https://ucp.dev/specs/shopping/fulfillment",
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"schema": "https://ucp.dev/schemas/shopping/fulfillment.json",
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"extends": "dev.ucp.shopping.checkout"
@@ -31,7 +31,7 @@
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{
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"id": "example_payment_provider",
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"name": "example.payment.provider",
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"version": "2026-01-11",
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"version": "2026-01-23",
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"spec": "https://pay.provider.example/specs/handlers/payments",
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"config_schema": "https://pay.provider.example/specs/handlers/config.json",
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"instrument_schemas": [

‎a2a/chat-client/App.tsx‎

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@@ -283,7 +283,7 @@ function App() {
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const defaultHeaders = {
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"Content-Type": "application/json",
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"X-A2A-Extensions":
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"https://ucp.dev/specification/reference?v=2026-01-11",
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"https://ucp.dev/specification/reference?v=2026-01-23",
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"UCP-Agent":
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'profile="http://localhost:3000/profile/agent_profile.json"',
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};

‎a2a/chat-client/profile/agent_profile.json‎

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@@ -1,30 +1,30 @@
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{
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"ucp": {
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"version": "2026-01-11",
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"version": "2026-01-23",
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"capabilities": [
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{
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"name": "dev.ucp.shopping.checkout",
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"version": "2026-01-11",
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"version": "2026-01-23",
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"spec": "https://ucp.dev/specs/shopping/checkout",
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"schema": "https://ucp.dev/schemas/shopping/checkout.json"
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},
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{
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"name": "dev.ucp.shopping.fulfillment",
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"version": "2026-01-11",
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"version": "2026-01-23",
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"spec": "https://ucp.dev/specs/shopping/fulfillment",
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"schema": "https://ucp.dev/schemas/shopping/fulfillment.json",
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"extends": "dev.ucp.shopping.checkout"
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},
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{
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"name": "dev.ucp.shopping.discount",
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"version": "2026-01-11",
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"version": "2026-01-23",
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"spec": "https://ucp.dev/specs/shopping/discount",
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"schema": "https://ucp.dev/schemas/shopping/discount.json",
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"extends": "dev.ucp.shopping.checkout"
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},
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{
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"name": "dev.ucp.shopping.buyer_consent",
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"version": "2026-01-11",
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"version": "2026-01-23",
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"extends": "dev.ucp.shopping.checkout"
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}
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]
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{
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"id": "example_payment_provider",
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"name": "example.payment.provider",
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"version": "2026-01-11",
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"version": "2026-01-23",
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"spec": "https://pay.provider.example/specs/handlers/payments",
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"config_schema": "https://pay.provider.example/specs/handlers/config.json",
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"instrument_schemas": [

‎a2a/docs/03-ucp-integration.md‎

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@@ -41,10 +41,10 @@ This enables any UCP-compliant client to work with any UCP-compliant merchant.
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```json
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{
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"ucp": {
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"version": "2026-01-11",
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"version": "2026-01-23",
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"services": {
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"dev.ucp.shopping": {
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"version": "2026-01-11",
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"version": "2026-01-23",
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"spec": "https://ucp.dev/specs/shopping",
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"a2a": {
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"endpoint": "http://localhost:10999/.well-known/agent-card.json"
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"capabilities": [
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{
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"name": "dev.ucp.shopping.checkout",
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"version": "2026-01-11",
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"version": "2026-01-23",
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"spec": "https://ucp.dev/specs/shopping/checkout",
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"schema": "https://ucp.dev/schemas/shopping/checkout.json"
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},
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{
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"name": "dev.ucp.shopping.fulfillment",
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"version": "2026-01-11",
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"version": "2026-01-23",
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"extends": "dev.ucp.shopping.checkout"
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}
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]
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{
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"id": "example_payment_provider",
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"name": "example.payment.provider",
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"version": "2026-01-11"
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"version": "2026-01-23"
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}
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]
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}
@@ -84,7 +84,7 @@ This enables any UCP-compliant client to work with any UCP-compliant merchant.
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```json
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{
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"ucp": {
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"version": "2026-01-11",
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"version": "2026-01-23",
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"capabilities": [
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{ "name": "dev.ucp.shopping.checkout" },
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{ "name": "dev.ucp.shopping.fulfillment" },

‎a2a/docs/05-frontend.md‎

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@@ -76,7 +76,7 @@ fetch("/api", {
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method: "POST",
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headers: {
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"Content-Type": "application/json",
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"X-A2A-Extensions": "https://ucp.dev/specification/reference?v=2026-01-11",
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"X-A2A-Extensions": "https://ucp.dev/specification/reference?v=2026-01-23",
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"UCP-Agent": `profile="http://localhost:3000/profile/agent_profile.json"`,
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},
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body: JSON.stringify(request),

‎a2a/docs/06-extending.md‎

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@@ -241,7 +241,7 @@ UCP capabilities let you extend checkout data in a standardized way. The client
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...existing...,
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{
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"name": "dev.ucp.shopping.loyalty",
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"version": "2026-01-11",
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"version": "2026-01-23",
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"extends": "dev.ucp.shopping.checkout"
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}
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]
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{
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"id": "stripe_handler",
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"name": "stripe.payment.provider",
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"version": "2026-01-11",
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"version": "2026-01-23",
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"config": { "business_id": "acct_123456" }
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}
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]

‎rest/nodejs/src/api/discovery.ts‎

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@@ -10,7 +10,7 @@ import { type UcpDiscoveryProfile } from "../models";
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* capabilities (checkout, order, etc.), and supported payment handlers.
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*/
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export class DiscoveryService {
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readonly ucpVersion = "2026-01-11";
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readonly ucpVersion = "2026-01-23";
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/**
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* Returns the merchant profile, detailing the server's UCP configuration.
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{
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id: "shop_pay",
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name: "com.shopify.shop_pay",
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version: "2026-01-11",
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version: "2026-01-23",
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spec: "https://shopify.dev/ucp/handlers/shop_pay",
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config_schema:
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"https://shopify.dev/ucp/handlers/shop_pay/config.json",

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