> ## Documentation Index
> Fetch the complete documentation index at: https://docs.adcontextprotocol.org/llms.txt
> Use this file to discover all available pages before exploring further.
# sync_creatives
> sync_creatives uploads and manages creative assets in an AdCP library with bulk uploads, upsert semantics, and generative creative support.
Upload and manage creative assets in a creative library. Supports bulk uploads, upsert semantics, and generative creatives. Implemented by any agent that hosts a creative library — creative agents (ad servers, creative management platforms) and sales agents that manage creatives.
**Response time**: Instant to days (returns `completed`, or `submitted` for review that takes hours/days)
**Request Schema**: [`creative/sync-creatives-request.json`](https://adcontextprotocol.org/schemas/3.2.0-beta.0/creative/sync-creatives-request.json)
**Response Schema**: [`creative/sync-creatives-response.json`](https://adcontextprotocol.org/schemas/3.2.0-beta.0/creative/sync-creatives-response.json)
## Quick start
Upload creative assets:
```javascript JavaScript theme={null}
import { testAgent } from "@adcp/sdk/testing";
import { SyncCreativesResponseSchema } from "@adcp/sdk";
import { randomUUID } from "node:crypto";
const result = await testAgent.syncCreatives({
account: {
brand: { domain: "acmecorp.com" },
operator: "acmecorp.com",
sandbox: true,
},
idempotency_key: randomUUID(),
creatives: [
{
creative_id: "creative_video_001",
name: "Summer Sale 30s",
format_kind: "video_hosted",
assets: {
video: {
asset_type: "video",
url: "https://cdn.example.com/summer-sale-30s.mp4",
width: 1920,
height: 1080,
duration_ms: 30000,
},
},
},
],
});
if (!result.success) {
throw new Error(`Request failed: ${result.error}`);
}
// Validate response against schema
const validated = SyncCreativesResponseSchema.parse(result.data);
// Three-shape discriminated union: errors | submitted | creatives
if ("errors" in validated && validated.errors && !("creatives" in validated) && !("status" in validated)) {
throw new Error(`Operation failed: ${JSON.stringify(validated.errors)}`);
}
if ("status" in validated && validated.status === "submitted") {
// Whole sync queued asynchronously — invoke get_task_status with task_id or await webhook
console.log(`Sync queued as task ${validated.task_id}: ${validated.message ?? ""}`);
} else if ("creatives" in validated) {
console.log(`Synced ${validated.creatives.length} creatives`);
for (const c of validated.creatives) {
// c.status carries review state: approved, pending_review, rejected, processing, archived
if (c.status === "pending_review" || c.status === "processing") {
console.log(` ${c.creative_id}: awaiting review (${c.status})`);
}
}
}
```
```python Python theme={null}
import asyncio
from adcp.testing import test_agent
from uuid import uuid4
async def main():
result = await test_agent.simple.sync_creatives(
account={
'brand': {'domain': 'acmecorp.com'},
'operator': 'acmecorp.com',
'sandbox': True
},
idempotency_key=str(uuid4()),
creatives=[{
'creative_id': 'creative_video_001',
'name': 'Summer Sale 30s',
'format_kind': 'video_hosted',
'assets': {
'video': {
'asset_type': 'video',
'url': 'https://cdn.example.com/summer-sale-30s.mp4',
'width': 1920,
'height': 1080,
'duration_ms': 30000
}
}
}]
)
# Three-shape discriminated union: errors | submitted | creatives
if getattr(result, 'status', None) == 'submitted':
# Whole sync queued asynchronously — invoke get_task_status with task_id or await webhook
print(f"Sync queued as task {result.task_id}: {getattr(result, 'message', '') or ''}")
return
if getattr(result, 'errors', None) and not getattr(result, 'creatives', None):
raise Exception(f"Operation failed: {result.errors}")
print(f"Synced {len(result.creatives)} creatives")
for c in result.creatives:
# c.status carries review state: approved, pending_review, rejected, processing, archived
if getattr(c, 'status', None) in ('pending_review', 'processing'):
print(f" {c.creative_id}: awaiting review ({c.status})")
asyncio.run(main())
```
**Note:** Per-creative async review is surfaced via `creatives[].status` (e.g., `pending_review`) on the synchronous success response. When the *whole* operation is queued (batch ingestion, governance review gating the sync), the response is a submitted envelope with top-level `status: "submitted"` and a `task_id`. See [Async approval workflow](#async-approval-workflow).
## Read-after-write visibility
Creatives accepted via a synchronous `sync_creatives` success response MUST be committed to the creative library before the response is returned. They MUST be immediately visible to subsequent [`list_creatives`](/dist/docs/3.2.0-beta.0/creative/task-reference/list_creatives) calls from the same account and authorized caller, including creatives whose review lifecycle status is `processing` or `pending_review`.
Implementations that acknowledge a creative on the synchronous success branch but buffer the library write until a later background commit are not conformant. If the whole sync operation cannot commit before returning, use the submitted task envelope instead; the visibility requirement then applies when the task completes with accepted creatives.
## Request parameters
| Parameter | Type | Required | Description |
| ----------------- | ----------- | -------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `account` | object | Yes | Account reference identifying the advertiser/workspace for this sync ([account-ref](/dist/docs/3.2.0-beta.0/accounts/overview)) |
| `idempotency_key` | string | Yes | Client-generated key that makes retries safe. Use a fresh UUID or other unique value per request. |
| `creatives` | Creative\[] | Yes | Creative assets to upload/update (max 100) |
| `creative_ids` | string\[] | No | Optional filter to limit sync scope to specific creative IDs. Only these creatives are affected, others remain untouched. Useful for partial updates and error recovery. |
| `assignments` | array | No | Array of `{creative_id, package_id}` objects for bulk assignment. Optional `weight` and `placement_ids` per assignment. |
| `dry_run` | boolean | No | When true, rehearse this exact sync operation without applying it (default: false). Use this for seller trafficking acceptance checks; use [`validate_input`](https://adcontextprotocol.org/schemas/3.2.0-beta.0/creative/validate-input-request.json) for manifest-only preflight against canonical/product format targets. |
| `validation_mode` | string | No | Validation strictness: `"strict"` (default) or `"lenient"` |
| `delete_missing` | boolean | No | When true, creatives not in this sync are archived (default: false). Cannot be combined with `creative_ids`. Cannot delete creatives assigned to active, non-paused packages. |
### Creative object
| Field | Type | Required | Description |
| ------------------- | ------------------- | --------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| `creative_id` | string | Yes | Unique identifier for this creative |
| `name` | string | Yes | Human-readable name |
| `format_kind` | CanonicalFormatKind | Yes for 3.2 authoring | Portable canonical format path. Pair with `format_option_ref` when exact routing is required. |
| `format_id` | FormatId | Deprecated | Named-format compatibility path for older 3.x peers; mutually exclusive with `format_kind`. |
| `format_option_ref` | FormatOptionRef | No | Optional structured reference to a product or publisher format option. Required when the target product has multiple options with the same `format_kind`. |
| `assets` | object | Yes | Assets keyed by the selected format's slot name (`asset_group_id` for canonical formats). Catalogs are included as assets with `asset_type: "catalog"`. See [Catalogs](/dist/docs/3.2.0-beta.0/creative/catalogs). |
| `localization` | object \| null | No | Sync-only explicit source and target locale variants. Requires `get_adcp_capabilities.creative.localization`. An object replaces the complete locale set; null removes it. Omission preserves existing localization only when source assets are exactly unchanged. |
| `tags` | string\[] | No | Searchable tags for creative organization |
New 3.2 integrations use `format_kind` with `format_option_ref` when routing depends on a product's declared option. A compatibility implementation may accept the legacy branch from an older peer, but never mixes both shapes.
Before uploading, buyers MUST verify each creative manifest against the target product's canonical `format_options[]`. The manifest MUST include every asset slot that the selected format option declares as required, keyed by that slot's `asset_group_id`.
### Native localization
Discover support before writing. The agent's
`get_adcp_capabilities.creative.localization` block advertises structural
support, RFC 4647 Lookup, and an optional target ceiling. Locale, format, and
account support is validated against each request. A seller MUST reject an
unsupported locale/format pair, duplicate target locale/ID, target locale/ID
that reuses the source value, missing materialized assets, or invalid default
reference before mutating seller systems or the creative library. JSON Schema `uniqueItems`
compares whole objects and is not sufficient for those property-level rules;
conformance verifiers consume the schema's `x-adcp-validation` constraints.
This is the only localization mutation surface. Inline package creatives in
[`create_media_buy`](/dist/docs/3.2.0-beta.0/media-buy/task-reference/create_media_buy) and [`update_media_buy`](/dist/docs/3.2.0-beta.0/media-buy/task-reference/update_media_buy) reject `localization`; sync the
localized library creative here, then assign it by `creative_id`.
```json theme={null}
{
"$schema": "https://adcontextprotocol.org/schemas/3.2.0-beta.0/creative/sync-creatives-request.json",
"adcp_version": "3.1",
"idempotency_key": "550e8400-e29b-41d4-a716-446655440000",
"account": { "account_id": "acct_nova" },
"creatives": [
{
"creative_id": "summer_image_localized",
"name": "Summer image — localized",
"format_kind": "image",
"assets": {
"image": {
"asset_type": "image",
"url": "https://cdn.nova.example/summer-en.jpg",
"width": 1080,
"height": 1080
},
"headline": {
"asset_type": "text",
"content": "Summer starts here",
"language": "en-US"
}
},
"localization": {
"source": {
"locale_variant_id": "loc_en_us",
"locale": "en-US"
},
"target_variants": [
{
"locale_variant_id": "loc_es_mx",
"locale": "es-MX",
"assets": {
"image": {
"asset_type": "image",
"url": "https://cdn.nova.example/summer-es-mx.jpg",
"width": 1080,
"height": 1080
},
"headline": {
"asset_type": "text",
"content": "El verano empieza aquí",
"language": "es-MX"
}
}
}
],
"locale_fallbacks": [
{
"language_range": "es",
"locale_variant_id": "loc_es_mx"
}
],
"default_locale_variant_id": "loc_en_us",
"unmatched_locale_action": "do_not_serve"
}
}
]
}
```
Source identifies production provenance, not the serving default. Every target
contains materialized locale-specific overrides; missing slots inherit source.
`target_variants` may be empty to declare the canonical locale of a monolingual
source-only creative, such as a single `fr-CA` creative for French-only Québec
inventory. Do not invent a second locale variant merely to declare source
language.
`default_locale_variant_id` may select source or target. This task never asks
the seller to translate: use buyer tooling, [`build_creative`](/dist/docs/3.2.0-beta.0/creative/task-reference/build_creative), or a separate
translation/transformation agent first, then sync the resulting assets.
At delivery, the seller applies RFC 4647 Lookup to ordered locale preferences.
Each progressively truncated requested range matches only an equal available
canonical tag; it does not prefix-match sibling regional tags.
The ordered list comes from the seller's serving environment and is outside
this task: AdCP does not define how browser, content, geography, user, app, or
platform signals produce it or their precedence.
For each preference, a strict miss is followed by the most-specific matching
`locale_fallbacks` rule before the next preference is tried. The example's `es`
rule lets an `es-ES` preference use `loc_es_mx`; without that rule, no regional
substitution is inferred. After every preference misses both paths, the seller
follows `unmatched_locale_action`: serve `default_locale_variant_id` or make the
creative ineligible. It never silently assumes the source is the default.
Standalone library sync has no product context and does not apply product locale
policy. When `assignments[]` binds a creative to a package whose effective
format option has `locale_policy`, the
seller uses RFC 4647 Basic Filtering to derive the eligible source/target
variant set before running the buyer algorithm above. For example, seller range
`fr` accepts `fr-CA` and `fr-FR`. The assignment fails with
[`CREATIVE_LOCALE_NOT_ACCEPTED`](/dist/docs/3.2.0-beta.0/building/verification/compliance-catalog#error-code-creative-locale-not-accepted) if no materialized variant matches. If
`unmatched_locale_action` is `serve_default`, the default variant must also be
seller-eligible. Buyer fallback and default rules never override the product or
placement constraint; nonmatching variants remain stored for other products.
The seller runs this check independently for every placement where the
assignment may serve. If one placement fails, the assignment is rejected unless
the buyer narrows its placement scope to compatible placements.
Accepted localized results include `localization` as a complete
source-plus-target variant list. The response preserves the request's exact
source ID/locale, target ID/locale set, fallback-rule set, default ID, and unmatched action. Each
variant returns complete resolved assets under the same buyer-assigned
`locale_variant_id`; no seller- or platform-assigned variant ID is required.
The enclosing creative's single `status` governs the complete set. If the
seller cannot read back any one of those values exactly, the item fails rather
than silently falling back to the source language.
Every accepted localized result (`created`, `updated`, or `unchanged`) MUST
carry top-level aggregate `status` and complete `localization`; `failed` and
`deleted` results MUST omit localization. A later
[`list_creatives`](/dist/docs/3.2.0-beta.0/creative/task-reference/list_creatives) read preserves the exact source/target identities.
`delete_missing` remains creative-scoped. If it archives a creative, every
locale variant follows the whole creative lifecycle, and omitted target locales
are never treated as missing creatives. A non-null `localization` object
transactionally replaces top-level source assets and the complete locale set;
failure leaves the prior state unchanged and must not expose orphaned locale
variants.
Null removes localization. Omission preserves localization only when top-level
source assets exactly equal the prior source assets. The normal active-delivery
update protection applies to all three operations.
### Promoting a build\_creative variant
When a buyer keeps a produced build leaf, the canonical promotion is to use the kept `build_variant_id` as the new `creative_id`. The seller does not need to hold a separate lineage mapping; delivery reporting can join back to the build leaf through the normal `creative_id`.
```json test=false theme={null}
{
"idempotency_key": "550e8400-e29b-41d4-a716-446655440000",
"account": { "account_id": "acct_acmecorp" },
"creatives": [
{
"creative_id": "bv_card01_a",
"name": "Summer card - studio take",
"format_kind": "image",
"assets": {
"headline_0_text": {
"asset_type": "text",
"content": "Summer Sale - 50% Off"
},
"image_0_url": {
"asset_type": "image",
"url": "https://cdn.example.com/beach-hero.jpg",
"width": 300,
"height": 250
}
}
}
]
}
```
Later, [`get_creative_delivery`](/dist/docs/3.2.0-beta.0/creative/task-reference/get_creative_delivery) uses `creative_id` as the join key. A workflow that mints a different library id instead of using the kept `build_variant_id` loses this protocol-visible join unless a future scoped lineage field is adopted.
### Asset structure
Assets are keyed by role name. Each role contains the asset details:
```json test=false theme={null}
{
"assets": {
"video": {
"url": "https://cdn.example.com/video.mp4",
"width": 1920,
"height": 1080,
"duration_ms": 30000
},
"thumbnail": {
"url": "https://cdn.example.com/thumb.jpg",
"width": 300,
"height": 250
}
}
}
```
For published-post reference products, the asset role is usually `published_post` and the payload contains a post URL or platform post ID instead of uploaded media bytes. Buyers can submit these assets through the canonical creative path, for example `format_kind: "video_hosted"` plus the product's `format_option_ref`, instead of creating a platform-specific `format_id`. If the seller can resolve the post but lacks a required downstream platform connection, such as the publisher identity that owns the post, the correctable error is [`AUTHORIZATION_REQUIRED`](/dist/docs/3.2.0-beta.0/building/verification/compliance-catalog#error-code-authorization-required). New implementations should include `error.details.missing_connections[]` so the caller can send a human through the correct connections flow and retry after authorization is restored.
### Assignments structure
Assignments are at the request level, mapping creative IDs to package IDs. Standalone creative agents that do not manage media buys ignore this field.
```json test=false theme={null}
{
"assignments": [
{ "creative_id": "creative_video_001", "package_id": "pkg_premium" },
{ "creative_id": "creative_video_001", "package_id": "pkg_standard" },
{ "creative_id": "creative_display_002", "package_id": "pkg_standard" }
]
}
```
**Adopter note (`@adcp/sdk` server-side):** the typed `syncCreatives(creatives, ctx)` signature does not surface `assignments` as a positional argument. The wire envelope lands on `RequestContext.input`, so handlers read `ctx.input.assignments` to fan out package bindings and emit `creatives[i].assigned_to` in the response. The same escape hatch applies to any request field the typed signature intentionally does not model. See [`adcp#5797`](https://github.com/adcontextprotocol/adcp/issues/5797) for the trace that motivated this note (SDK ≥ 11.1.0 threads `params` into `ctx.input`; earlier lines dropped the field at the projector seam).
## Response
Responses use discriminated unions — a response has exactly one of three shapes, never mixed:
**1. Synchronous success** — per-creative results:
* `creatives` - Results for each creative processed (includes both successful and failed items)
* `dry_run` - Boolean indicating if this was a dry run (optional)
**2. Terminal error** — no creatives processed:
* `errors` - Array of operation-level errors (auth failure, service unavailable)
**3. Submitted task envelope** — whole operation queued asynchronously (batch ingestion, governance review gating the sync):
* `status` - Always `"submitted"`
* `task_id` - Handle for polling via [`get_task_status`](https://adcontextprotocol.org/schemas/3.2.0-beta.0/protocol/get-task-status-request.json) on the A2A profile (or the advertised AdCP polling task on MCP), or receiving a webhook on completion
* `message` - Optional human-readable explanation of the queue state
The final per-creative `creatives` array lands on the task completion artifact, not on the submitted envelope. Per-item async review (one creative in `pending_review` while the rest of the sync resolves synchronously) belongs on the synchronous success branch with `status: "pending_review"` on that item, not here.
**Each creative in the success response includes:**
* All request fields
* `platform_id` - Platform's internal ID (when `action` is not `failed`)
* `action` - Lifecycle operation performed by this sync: `created`, `updated`, `unchanged`, `failed`, `deleted`
* `status` - **Advisory** review-lifecycle state ([`CreativeStatus`](https://adcontextprotocol.org/schemas/3.2.0-beta.0/enums/creative-status.json)): `processing`, `pending_review`, `approved`, `suspended`, `rejected`, `archived`. A UI hint and polling-scheduling signal — **not** a spend-authorization gate. Orthogonal to `action` — `action` describes what the sync did, `status` describes where the creative is in the review lifecycle. Values come from `CreativeStatus` only, never from `CreativeAction` (never put `created`/`updated`/`failed` in `status`). Sellers with async review return `processing` or `pending_review`; sellers with synchronous review MAY return a terminal value (`approved`/`rejected`) or `suspended` when a recoverable dependency/authorization gate prevents serving. **Buyers MUST NOT gate downstream spend or package activation on `status: approved` from this response** — reconcile via [`list_creatives`](/dist/docs/3.2.0-beta.0/creative/task-reference/list_creatives) or a signed review webhook before committing spend. Authoritative state is always via `list_creatives`. **MUST be omitted** when `action` is `failed` or `deleted` — failed items have no meaningful review state (see `errors`); deleted items are gone from the library. The schema enforces the omission rule via a conditional constraint.
* `localization` - Exact materialized source/target locale state. Required with top-level `status` on every accepted localized item, omitted on failed/deleted/unlocalized items. The top-level status is the single creative-wide review state.
* `errors` - Array of error messages (only when `action: "failed"`)
* `warnings` - Array of non-fatal warnings (optional)
**See schema for complete field list**: [sync-creatives-response.json](https://adcontextprotocol.org/schemas/3.2.0-beta.0/creative/sync-creatives-response.json)
## Common scenarios
### Bulk upload
Upload multiple creatives in one call:
```javascript JavaScript theme={null}
import { testAgent } from "@adcp/sdk/testing";
import { SyncCreativesResponseSchema } from "@adcp/sdk";
import { randomUUID } from "node:crypto";
const result = await testAgent.syncCreatives({
account: {
brand: { domain: "acmecorp.com" },
operator: "acmecorp.com",
sandbox: true,
},
idempotency_key: randomUUID(),
creatives: [
{
creative_id: "creative_display_001",
name: "Summer Sale Banner 300x250",
format_kind: "image",
assets: {
image: {
asset_type: "image",
url: "https://cdn.example.com/banner-300x250.jpg",
width: 300,
height: 250,
},
},
},
{
creative_id: "creative_video_002",
name: "Product Demo 15s",
format_kind: "video_hosted",
assets: {
video: {
asset_type: "video",
url: "https://cdn.example.com/demo-15s.mp4",
width: 1920,
height: 1080,
duration_ms: 15000,
},
},
},
{
creative_id: "creative_display_002",
name: "Summer Sale Banner 728x90",
format_kind: "image",
assets: {
image: {
asset_type: "image",
url: "https://cdn.example.com/banner-728x90.jpg",
width: 728,
height: 90,
},
},
},
],
});
if (!result.success) {
throw new Error(`Request failed: ${result.error}`);
}
const validated = SyncCreativesResponseSchema.parse(result.data);
if ("errors" in validated && validated.errors) {
throw new Error(`Operation failed: ${JSON.stringify(validated.errors)}`);
}
if ("creatives" in validated) {
console.log(`Successfully synced ${validated.creatives.length} creatives`);
validated.creatives.forEach((creative) => {
console.log(` ${creative.creative_id}: ${creative.action}`);
});
}
```
```python Python theme={null}
import asyncio
from adcp.testing import test_agent
from uuid import uuid4
async def main():
result = await test_agent.simple.sync_creatives(
account={
'brand': {'domain': 'acmecorp.com'},
'operator': 'acmecorp.com',
'sandbox': True
},
idempotency_key=str(uuid4()),
creatives=[
{
'creative_id': 'creative_display_001',
'name': 'Summer Sale Banner 300x250',
'format_kind': 'image',
'assets': {
'image': {
'asset_type': 'image',
'url': 'https://cdn.example.com/banner-300x250.jpg',
'width': 300,
'height': 250
}
}
},
{
'creative_id': 'creative_video_002',
'name': 'Product Demo 15s',
'format_kind': 'video_hosted',
'assets': {
'video': {
'asset_type': 'video',
'url': 'https://cdn.example.com/demo-15s.mp4',
'width': 1920,
'height': 1080,
'duration_ms': 15000
}
}
},
{
'creative_id': 'creative_display_002',
'name': 'Summer Sale Banner 728x90',
'format_kind': 'image',
'assets': {
'image': {
'asset_type': 'image',
'url': 'https://cdn.example.com/banner-728x90.jpg',
'width': 728,
'height': 90
}
}
}
]
)
# Check for operation-level errors first
if hasattr(result, 'errors') and result.errors:
raise Exception(f"Operation failed: {result.errors}")
print(f"Successfully synced {len(result.creatives)} creatives")
for creative in result.creatives:
print(f" {creative.creative_id}: {creative.action}")
asyncio.run(main())
```
### Generative creatives
Use the creative agent to generate creatives from brand identity data. See the [Generative Creatives guide](/dist/docs/3.2.0-beta.0/creative/generative-creative) for complete workflow details.
```javascript JavaScript theme={null}
import { testAgent } from "@adcp/sdk/testing";
import { SyncCreativesResponseSchema } from "@adcp/sdk";
import { randomUUID } from "node:crypto";
const result = await testAgent.syncCreatives({
account: {
brand: { domain: "acmecorp.com" },
operator: "acmecorp.com",
sandbox: true,
},
idempotency_key: randomUUID(),
creatives: [
{
creative_id: "creative_gen_001",
name: "AI-Generated Summer Banner",
format_kind: "image",
assets: {
prompt: {
asset_type: "text",
content: "Create a summer banner for outdoor enthusiasts. Headline: Summer gear built for every trail. CTA: Shop the collection.",
},
},
},
],
});
if (!result.success) {
throw new Error(`Request failed: ${result.error}`);
}
const validated = SyncCreativesResponseSchema.parse(result.data);
if ("errors" in validated && validated.errors) {
throw new Error(`Operation failed: ${JSON.stringify(validated.errors)}`);
}
if ("creatives" in validated) {
console.log(
"Generative creative synced:",
validated.creatives[0].creative_id
);
}
```
```python Python theme={null}
import asyncio
from adcp.testing import test_agent
from uuid import uuid4
async def main():
result = await test_agent.simple.sync_creatives(
account={
'brand': {'domain': 'acmecorp.com'},
'operator': 'acmecorp.com',
'sandbox': True
},
idempotency_key=str(uuid4()),
creatives=[{
'creative_id': 'creative_gen_001',
'name': 'AI-Generated Summer Banner',
'format_kind': 'image',
'assets': {
'prompt': {
'asset_type': 'text',
'content': 'Create a summer banner for outdoor enthusiasts. Headline: Summer gear built for every trail. CTA: Shop the collection.'
}
}
}]
)
# Check for operation-level errors first
if hasattr(result, 'errors') and result.errors:
raise Exception(f"Operation failed: {result.errors}")
print(f"Generative creative synced: {result.creatives[0].creative_id}")
asyncio.run(main())
```
### Dry run validation
Validate creative configuration without uploading:
```javascript JavaScript theme={null}
import { testAgent } from "@adcp/sdk/testing";
import { SyncCreativesResponseSchema } from "@adcp/sdk";
import { randomUUID } from "node:crypto";
const result = await testAgent.syncCreatives({
account: {
brand: { domain: "acmecorp.com" },
operator: "acmecorp.com",
sandbox: true,
},
idempotency_key: randomUUID(),
dry_run: true,
creatives: [
{
creative_id: "creative_test_001",
name: "Test Creative",
format_kind: "video_hosted",
assets: {
video: {
asset_type: "video",
url: "https://cdn.example.com/test-video.mp4",
width: 1920,
height: 1080,
duration_ms: 30000,
},
},
},
],
});
if (!result.success) {
throw new Error(`Request failed: ${result.error}`);
}
const validated = SyncCreativesResponseSchema.parse(result.data);
if ("errors" in validated && validated.errors && validated.errors.length > 0) {
console.log("Validation errors found:");
validated.errors.forEach((error) => console.log(` - ${error.message}`));
} else if (
"creatives" in validated && validated.creatives?.some((creative) => creative.action === "failed")
) {
console.log("Creative validation errors found.");
} else if (
"assignments" in validated && validated.assignments?.some((assignment) => assignment.status === "error")
) {
console.log("Assignment validation errors found.");
} else {
console.log("Validation passed! Ready to sync.");
}
```
```python Python theme={null}
import asyncio
from adcp.testing import test_agent
from uuid import uuid4
async def main():
result = await test_agent.simple.sync_creatives(
account={
'brand': {'domain': 'acmecorp.com'},
'operator': 'acmecorp.com',
'sandbox': True
},
idempotency_key=str(uuid4()),
dry_run=True,
creatives=[{
'creative_id': 'creative_test_001',
'name': 'Test Creative',
'format_kind': 'video_hosted',
'assets': {
'video': {
'asset_type': 'video',
'url': 'https://cdn.example.com/test-video.mp4',
'width': 1920,
'height': 1080,
'duration_ms': 30000
}
}
}]
)
if hasattr(result, 'errors') and result.errors:
error_messages = [error.message for error in result.errors]
raise Exception(f"Validation errors: {error_messages}")
if any(getattr(creative, 'action', None) == 'failed' for creative in getattr(result, 'creatives', [])):
raise Exception('Creative validation errors found')
if any(getattr(assignment, 'status', None) == 'error' for assignment in getattr(result, 'assignments', [])):
raise Exception('Assignment validation errors found')
print('Validation passed! Ready to sync.')
asyncio.run(main())
```
### Scoped update with creative\_ids filter
Update only specific creatives from a large library without affecting others:
```javascript JavaScript theme={null}
import { testAgent } from "@adcp/sdk/testing";
import { SyncCreativesResponseSchema } from "@adcp/sdk";
import { randomUUID } from "node:crypto";
// Update just 2 creatives out of 100+ in the library
const result = await testAgent.syncCreatives({
account: {
brand: { domain: "acmecorp.com" },
operator: "acmecorp.com",
sandbox: true,
},
idempotency_key: randomUUID(),
creative_ids: ["creative_video_001", "creative_display_001"],
creatives: [
{
creative_id: "creative_video_001",
name: "Summer Sale 30s - Updated",
format_kind: "video_hosted",
assets: {
video: {
asset_type: "video",
url: "https://cdn.example.com/updated-video.mp4",
width: 1920,
height: 1080,
duration_ms: 30000,
},
},
},
{
creative_id: "creative_display_001",
name: "Summer Sale Banner - Updated",
format_kind: "image",
assets: {
image: {
asset_type: "image",
url: "https://cdn.example.com/updated-banner.jpg",
width: 300,
height: 250,
},
},
},
],
});
if (!result.success) {
throw new Error(`Request failed: ${result.error}`);
}
const validated = SyncCreativesResponseSchema.parse(result.data);
if ("errors" in validated && validated.errors) {
throw new Error(`Update failed: ${JSON.stringify(validated.errors)}`);
}
if ("creatives" in validated) {
console.log(
`Updated ${validated.creatives.length} creatives, others untouched`
);
}
```
```python Python theme={null}
import asyncio
from adcp.testing import test_agent
from uuid import uuid4
async def main():
# Update just 2 creatives out of 100+ in the library
result = await test_agent.simple.sync_creatives(
account={
'brand': {'domain': 'acmecorp.com'},
'operator': 'acmecorp.com',
'sandbox': True
},
idempotency_key=str(uuid4()),
creative_ids=['creative_video_001', 'creative_display_001'],
creatives=[
{
'creative_id': 'creative_video_001',
'name': 'Summer Sale 30s - Updated',
'format_kind': 'video_hosted',
'assets': {
'video': {
'asset_type': 'video',
'url': 'https://cdn.example.com/updated-video.mp4',
'width': 1920,
'height': 1080,
'duration_ms': 30000
}
}
},
{
'creative_id': 'creative_display_001',
'name': 'Summer Sale Banner - Updated',
'format_kind': 'image',
'assets': {
'image': {
'asset_type': 'image',
'url': 'https://cdn.example.com/updated-banner.jpg',
'width': 300,
'height': 250
}
}
}
]
)
if hasattr(result, 'errors') and result.errors:
raise Exception(f"Update failed: {result.errors}")
print(f"Updated {len(result.creatives)} creatives, others untouched")
asyncio.run(main())
```
**Why use creative\_ids filter:**
* Scoped updates: Only specified creatives modified, even with 100+ in library
* Error recovery: Retry only failed creatives after bulk sync validation failures
* Performance: Publisher can optimize processing when scope is known upfront
* Safety: Explicit targeting reduces risk of unintended changes
## Async approval workflow
Two distinct async patterns — match the right one to the agent's behavior:
**Per-creative async review** (common): the sync operation itself resolves synchronously, but one or more creatives require downstream review (brand safety, policy compliance). Items in review come back on the synchronous success response with `status: "pending_review"` (or `processing` during ingestion). The buyer reconciles terminal state via [`list_creatives`](/dist/docs/3.2.0-beta.0/creative/task-reference/list_creatives) or a webhook.
**Operation-level async** (less common): the whole sync is queued — the seller cannot return any per-item results before responding, because ingestion is batched or governance review gates the entire sync. The response is a submitted envelope:
* Top-level `status: "submitted"` with `task_id`
* `message` — optional human-readable explanation
* No `creatives` array on this envelope
Invoke [`get_task_status`](https://adcontextprotocol.org/schemas/3.2.0-beta.0/protocol/get-task-status-request.json) on the A2A profile (or the advertised AdCP polling task on MCP), or wait for the webhook. The completion artifact carries the `creatives` array with per-item `action`/`status` results; operation-level failures surface as `status: "failed"` on the task.
**See:** [Webhooks](/dist/docs/3.2.0-beta.0/building/by-layer/L3/webhooks) for webhook configuration.
## Sync modes
### Upsert (default)
* Creates new creatives or updates existing by `creative_id`
* `assignments[]` remains the deprecated additive assignment shorthand
* `assignment_operations[]` can traffic existing IDs without resending creative bodies: `assign` upserts weight/placement scope, `unassign` removes one assignment, and `replace` atomically swaps an existing creative for a replacement
* Updates provided fields, leaves others unchanged
* Use `creative_ids` filter to limit scope to specific creatives
### Dry run
* Rehearses the same `sync_creatives` acceptance path without committing library, assignment, review, or serving changes
* Returns operation-level errors, per-creative failures, assignment errors, and warnings the seller can determine before mutation
* Does not create or update creatives, package assignments, review state, or serving state
* Use for seller trafficking acceptance checks; use [`validate_input`](https://adcontextprotocol.org/schemas/3.2.0-beta.0/creative/validate-input-request.json) for manifest-only canonical/product preflight
## Error handling
| Error Code | Description | Resolution |
| ------------------------------------------------------------------------------------------------------------------------------------------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| [`UNSUPPORTED_FEATURE`](/dist/docs/3.2.0-beta.0/building/verification/compliance-catalog#error-code-unsupported-feature) | Format not supported by this seller or product | Check the product's canonical `format_options[]` |
| [`VALIDATION_ERROR`](/dist/docs/3.2.0-beta.0/building/verification/compliance-catalog#error-code-validation-error) | Manifest failed format validation: an asset file is corrupt or invalid, or assets don't match the format's requirements (codec, dimensions, duration). `error.field` identifies the offending asset path | Verify asset types and specifications match the format definition |
| [`PACKAGE_NOT_FOUND`](/dist/docs/3.2.0-beta.0/building/verification/compliance-catalog#error-code-package-not-found) | Package ID doesn't exist in media buy | Verify `package_id`; for legacy package correlation use [`get_media_buys`](/dist/docs/3.2.0-beta.0/media-buy/task-reference/get_media_buys) + package `context.buyer_ref` |
| [`CREATIVE_REJECTED`](/dist/docs/3.2.0-beta.0/building/verification/compliance-catalog#error-code-creative-rejected) | Creative failed content-policy, brand-safety, or accessibility review | Revise according to the applicable policy or validated accessibility criteria |
| [`CREATIVE_LOCALE_NOT_ACCEPTED`](/dist/docs/3.2.0-beta.0/building/verification/compliance-catalog#error-code-creative-locale-not-accepted) | Assigned creative has no materialized variant accepted by the package's effective format `locale_policy`, lacks locale topology, or uses an ineligible `serve_default` | Supply a matching source/target variant, choose a compatible format option, or change the default policy |
| [`INVALID_STATE`](/dist/docs/3.2.0-beta.0/building/verification/compliance-catalog#error-code-invalid-state) | Creative is assigned to an active, non-paused package (blocks updates and `delete_missing` deletions) | Pause the package first, or create a new creative version |
Sellers that declare `creative_specs.vast_validation` of `document` or `wrapper` additionally validate `vast` assets at sync time (including `dry_run`) and can return [`VAST_PARSE_FAILED`](/dist/docs/3.2.0-beta.0/building/verification/compliance-catalog#error-code-vast-parse-failed), [`VAST_VERSION_MISMATCH`](/dist/docs/3.2.0-beta.0/building/verification/compliance-catalog#error-code-vast-version-mismatch), or [`VAST_WRAPPER_DEPTH_EXCEEDED`](/dist/docs/3.2.0-beta.0/building/verification/compliance-catalog#error-code-vast-wrapper-depth-exceeded). See [VAST Validation](/dist/docs/3.2.0-beta.0/creative/channels/video#vast-validation).
## Best practices
1. **Use upsert semantics** - Same `creative_id` updates existing creative rather than creating duplicates. This allows iterative creative development. Note: updates are blocked for creatives in active delivery (see #6).
2. **Rehearse seller acceptance first** - Use `dry_run: true` when you need to catch upload, upsert, assignment, account, policy, or format errors before mutating the seller's creative library. Use [`validate_input`](https://adcontextprotocol.org/schemas/3.2.0-beta.0/creative/validate-input-request.json) earlier in the workflow only for manifest-structure preflight or multi-target product comparison.
3. **Batch assignment operations** - Use one idempotent `assignment_operations[]` call for assignment updates, removals, and replacements. This keeps creative trafficking separate from MediaBuy commercial controls and avoids races between calls.
4. **CDN-hosted assets** - Use publicly accessible CDN URLs for faster processing. Platforms can fetch assets directly without proxy delays.
5. **Brand identity** - For generative creatives, validate brand identity schema before syncing to avoid processing failures.
6. **Active delivery protection** - Creatives assigned to active, non-paused packages cannot be updated or deleted via `delete_missing`. Pause the package first, use `assignment_operations` to unassign or replace the creative, or create a new creative with a different `creative_id`.
## Related tasks
* [Canonical formats](/dist/docs/3.2.0-beta.0/creative/canonical-formats) - Check product and publisher format contracts before upload
* [`list_creatives`](/dist/docs/3.2.0-beta.0/creative/task-reference/list_creatives) - Browse and filter creatives in a library
* [`build_creative`](/dist/docs/3.2.0-beta.0/creative/task-reference/build_creative) - Build manifests from library creatives or generate from scratch
* [`preview_creative`](/dist/docs/3.2.0-beta.0/creative/task-reference/preview_creative) - Generate previews of creative manifests
* [Creative Asset Types](/dist/docs/3.2.0-beta.0/creative/asset-types) - Technical requirements for assets