Ebay Marketing API

Name: Marketing API
Brand: eBay Marketing API
Availability: InStock

✓ Official Vendor SpecMarketingAdvertisingoauth282 EndpointsREST

Install Jentic One Beta

Connect the Marketing API to your agent

Jentic One is a self-hosted execution layer for AI agents. It lets your agent call the Marketing API, or any other public or private API you need. You set the rules, the agent never sees your credentials, and every call is logged.

Two steps, two machines. Install the instance in a safe environment, then register your agent from wherever it runs.

Step 1: Jentic One Host machine

# On the machine that will host your Jentic One instance:
curl -fsSL https://raw.githubusercontent.com/jentic/jentic-one/main/tools/install.sh | sh

Step 2: Agent machine

# On the machine where your agent runs (keep this separate from the instance):
curl -fsSL https://raw.githubusercontent.com/jentic/jentic-one/main/tools/install.sh | sh
jentic register       # connects your agent to your Jentic One instance

Jentic One is in public beta. The setup above keeps your agent separate from the instance, which is what you want before using real credentials: an agent running as the same OS user as Jentic One can read its stored keys directly. Just evaluating? A single local install is fine to start. See the secure deployment guide for the tiers.

Capabilities

What an agent can do with Marketing API.

Create and update Promoted Listings campaigns with bulk ad operations by listingId or inventoryReference

Adjust per-ad bids in batch and toggle ad status across thousands of listings in a single call

Manage Advanced campaign keywords and negative-keyword lists for cost-per-click bidding

GET STARTED

Start building with Marketing API

Explore with Jentic

View OpenAPI Document

For Agents

Run promoted listings campaigns, manage keywords and bids, and build coded-coupon and discount promotions for eBay sellers.

Use for: Set up a Promoted Listings Standard campaign for a seller's top 50 SKUs, Increase the bid on a list of ads by 10 percent, Pause a Promoted Listings campaign that has spent more than its daily budget, List all keywords in an Advanced campaign and their current cost-per-click bids

Not supported: Does not handle order fulfillment, listing creation, or buyer messaging - use for eBay seller advertising, promotions, and store-email campaigns only.

Use Cases

Patterns agents use Marketing API for, with concrete tasks.

★ Promoted Listings Campaign Automation

Sellers running thousands of SKUs use the Marketing API to add or remove Promoted Listings ads in bulk by listingId or inventoryReference, set per-ad bids, and toggle status without using Seller Hub. The bulk_create_ads, bulk_update_ads_bid, and bulk_update_ads_status endpoints accept arrays of items so a nightly job can rebalance an entire campaign in minutes.

POST /ad_campaign/{campaign_id}/bulk_update_ads_bid_by_listing_id with new bid percentages for the seller's top 200 listings.

Advanced Keyword and Negative Keyword Management

Promoted Listings Advanced campaigns rely on keywords and bids similar to paid search. The Marketing API exposes keyword and negative-keyword resources so an agent can pull current bids, identify under-performing keywords, raise bids on winners, and add negative keywords to suppress wasted spend. Each keyword change is scoped to a specific campaignId and adGroupId.

List keywords for an Advanced campaign, identify keywords with cost above a threshold and zero attributed sales, and add them as negative keywords.

Coupon and Promotion Creation

The Marketing API supports coded coupons, item promotions, and order discounts that sellers can attach to their eBay storefront. Each promotion has an inventory criterion (categories, listings, or inventory references), a budget, and a schedule. Agents can spin up time-limited offers to drive conversion during a sales event without manual store edits.

Create a coded coupon worth 15 percent off for a category of listings, valid for seven days, with a budget cap of $500.

Ad Performance Reporting

The Marketing API generates and retrieves ad reports with impressions, clicks, sales attribution, and ad fees by campaign, listing, or keyword. Reports run asynchronously and complete reports are downloaded by reportId. Sellers feed these into BI tools to track ROAS at the SKU level and adjust bids based on outcomes.

Schedule an ad performance report for the last 30 days, poll until ready, and download the report by reportId.

AI Agent Promoted Listings Optimisation

An AI agent invoked by a seller's commerce platform can use Jentic to discover Marketing API operations, pull current ad performance, and rebalance bids on its own schedule. Jentic delivers OAuth scope, operation schemas, and bulk-update endpoints into the agent's context so the agent can apply policy changes across thousands of ads without reading the eBay developer portal.

Through Jentic, search 'update ebay ad bids', load the bulk_update_ads_bid_by_listing_id schema, and apply a +10% bid adjustment to listings with strong attributed sales.

Key Endpoints

82 endpoints — the ebay marketing api lets sellers run promoted listing campaigns, build email and on-site promotions, and pull marketing performance data programmatically.

METHOD

PATH

DESCRIPTION

POST

/ad_campaign/{campaign_id}/ad

Create an ad in a Promoted Listings campaign

POST

/ad_campaign/{campaign_id}/bulk_create_ads_by_listing_id

Bulk-create ads from a list of listing IDs

POST

/ad_campaign/{campaign_id}/bulk_update_ads_bid_by_listing_id

Bulk-update ad bids by listing ID

POST

/ad_campaign/{campaign_id}/bulk_update_ads_status

Bulk-update ad status across a campaign

GET

/ad_campaign/{campaign_id}/ad

List ads in a campaign

POST

/ad_campaign/{campaign_id}/ad

Create an ad in a Promoted Listings campaign

POST

/ad_campaign/{campaign_id}/bulk_create_ads_by_listing_id

Bulk-create ads from a list of listing IDs

POST

/ad_campaign/{campaign_id}/bulk_update_ads_bid_by_listing_id

Bulk-update ad bids by listing ID

POST

/ad_campaign/{campaign_id}/bulk_update_ads_status

Bulk-update ad status across a campaign

GET

/ad_campaign/{campaign_id}/ad

List ads in a campaign

Why Jentic?

Three things that make agents converge on Jentic-routed access.

Credential isolation

Your eBay OAuth seller credentials are stored once, encrypted, by your own Jentic One instance and injected at execution time. They never enter the agent's prompt, logs, or context.

Intent-based discovery

Agents search Jentic by intent such as 'update eBay ad bids' or 'create an eBay coupon', and Jentic returns the matching ad or coupon operation with its input schema so the agent calls the right endpoint without browsing the reference docs.

Time to first call

FAQs

Specific to using Marketing API through Jentic.

What authentication does the eBay Marketing API use?

The eBay Marketing API uses OAuth 2.0 (the api_auth scheme) with seller-scoped access tokens. Through Jentic the OAuth client credentials and refresh tokens stay encrypted in your Jentic One instance and the agent only receives short-lived access tokens scoped to the sell.marketing scope.

Can I bulk-update Promoted Listings ad bids with the eBay Marketing API?

Yes. POST /ad_campaign/{campaign_id}/bulk_update_ads_bid_by_listing_id and the inventory_reference equivalent accept arrays of ads with new bid percentages so you can rebalance hundreds of ads in one call.

What are the rate limits for the eBay Marketing API?

eBay enforces per-application call limits across the Sell APIs that depend on the seller's Application Growth Check tier rather than per-endpoint quotas in the spec. Bulk endpoints exist precisely to keep within those limits at scale.

How do I create a coded coupon with the eBay Marketing API through Jentic?

Search 'create ebay coupon' in Jentic, load the POST /item_promotion or coded_coupon schema, and submit the discount, eligible inventory, schedule, and budget. Jentic returns the created promotion ID.

Does the eBay Marketing API support keyword bidding for Promoted Listings Advanced?

Yes. The keyword and negative_keyword endpoints under an Advanced campaign let you list, create, update, and delete keywords with cost-per-click bids and exclusion lists for that ad group.

Can I retrieve Promoted Listings performance data with the eBay Marketing API?

Yes. The ad_report endpoints schedule reports asynchronously and return reportId values. Once ready, the report download exposes impressions, clicks, ad fees, and attributed sales by campaign, listing, or keyword.

Can I limit what my agent is allowed to do with the eBay Marketing API?

Yes. Because you run Jentic One yourself, your own rules decide which eBay Marketing operations and credentials the agent may use. Since each campaign id sits in the URL path (/ad_campaign/{campaign_id}/...), you can pin the agent to a single campaign, and you pick the exact operations it may call, so you can allow creating ads and updating bids while leaving bulk ad-status changes out unless you add them. The eBay OAuth seller credentials stay encrypted in your instance and are injected only at execution time, never reaching the agent's prompt or logs.

Ebay Marketing API

Connect the Marketing API to your agent

Capabilities

Start building with Marketing API

Use Cases

Key Endpoints

Why Jentic?

Related APIs

FAQs