Ebay Marketing API
Browse all Ebay APIs60
AI ReadinessAI-Aware (B-)60/100
Official vendor OpenAPI document · agent-readyMarketingAdvertisingoauth282 EndpointsREST
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.
The eBay Marketing API lets sellers run promoted listing campaigns, build email and on-site promotions, and pull marketing performance data programmatically. Across 82 endpoints it covers Promoted Listings (Standard, Advanced, and Priority), promotional offers like coded coupons and item-level discounts, ad reports, and keyword and negative-keyword management for Advanced campaigns. Sellers can bulk-add or remove ads by listing ID or inventory reference, update bids, and schedule promotions across the eBay marketplace.
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.
1
Step 1: Jentic One Host machine
# On the machine that will host your Jentic One instance:
curl -fsSL "https://jentic.com/install.sh?src=apis&api=%2Fapis%2Febay.com%2Fsell-marketing" | sh2
Step 2: Agent machine
# On the machine where your agent runs (keep this separate from the instance):
curl -fsSL "https://jentic.com/install.sh?src=apis&api=%2Fapis%2Febay.com%2Fsell-marketing" | sh
jentic register # connects your agent to your Jentic One instanceJentic 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
Build coded-coupon, item-promotion, and order-discount promotions with eligibility rules
Schedule and retrieve ad performance reports with impression, click, and sales attribution data
Manage email-campaign audiences and broadcasts to a seller's eBay store followers
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
Jentic AI Readiness Score
This API is usable in Jentic One now. Its AI-readiness score against Jentic's framework shows where it stands today and where improvements would make it even easier for agents to use.
M
Marketing API
- AI-Aware (B-)60/100
45
Foundational Compliance69
Developer Experience & Jentic Compatibility46
AI-Readiness & Agent Experience89
Agent Usability85
Security63
AI DiscoverabilityPowered by JenticScoring Framework 1.0.0 | Scoring Engine 0.4.0
Show dimension breakdown
45
Foundational Compliance
Base layer of spec validity and structural soundness.
Grade: DSignals: 4
68%
Lint Results
Aggregated quality score from linter diagnostics, weighted by severity.
100%
Resolution Completeness
Percentage of `$ref` references that resolve successfully.
0%
Specification Validity
Checks whether the API description parses successfully and conforms to its declared specification (e.g., OpenAPI).
14%
Structural Integrity
Structural correctness score based on schema issues using logarithmic dampening.
69
Developer Experience & Jentic Compatibility
Clarity, completeness, and ingestion readiness for developers and tooling.
Grade: B+Signals: 4
0%
Example Density
How richly the API is illustrated with examples.
100%
Example Validity
Percentage of examples that conform to their schemas.
75%
Response Coverage
Percentage of operations with complete response definitions (success, client error, server error).
100%
Tooling Readiness
Health of API ingestion, bundling, and resolution within Jentic pipelines.
46
AI-Readiness & Agent Experience
Semantic breadth, depth, and agent comprehension for AI systems.
Grade: DSignals: 4
83%
Description Coverage
Coverage of descriptions across API elements.
0%
Error Standardization
Coverage of RFC 9457 Problem Details for error responses.
100%
OperationId Quality
Coverage, uniqueness, and casing consistency of operationIds for AI inference.
0%
Summary Coverage
Coverage of summaries across operations/tags/info.
89
Agent Usability
Functional utility, complexity comfort, and AI orchestration readiness.
Grade: ASignals: 1
89%
Complexity Comfort
Agent comfort level based on API operational and structural complexity.
85
Security
Trust, risk posture, and security compliance.
Grade: ASignals: 1
85%
Authentication Strength
Average quality of security schemes based on authentication method strength (weakest link for OAuth2).
63
AI Discoverability
Findability, semantic richness, and reasoning readiness.
Grade: BSignals: 1
63%
Descriptive Richness
Clarity and depth of descriptions across API elements.
Score it yourself
Every API in the directory is allowlisted, so you can re-score it with no key required.
npx @jentic/api-scorecard-cli score <openapi-url>Why Jentic?
What agents get from Jentic-routed access to this vendor.
Setup
Wiring the eBay Marketing API by hand means implementing eBay's OAuth 2.0 authorization-code flow for a seller user token, refreshing it, and pointing requests at the api.ebay.com sell/marketing host across dozens of campaign and promotion endpoints. Through Jentic you install once, import the Marketing API from the API Directory, store the eBay OAuth credentials once, and your agent calls it.
Permission scoping
Marketing operations put the campaign id in the URL path (/ad_campaign/{campaign_id}/...), so a rule can pin your agent to one campaign. You choose the operations it may call, so you can allow creating ads and updating bids for that campaign while leaving bulk status changes out unless you add them.
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.
Related APIs
Alternatives and complements available in the Jentic catalogue.
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.
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