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Head to head · Ad reporting · October 2026 research run

Amazon Ads API vs X Ads API

Amazon Ads API scores 59 (C) on agent readiness against X Ads API's 57.3 (C), and leads in 5 of 7 scored categories. X Ads API leads on reliability. Both do ad reporting.

Best advertising platform APIs for AI agents · All 28 advertising comparisons

Amazon Ads APIAmazon · HTTP API C59/100#563 of 950 X Ads APIX Corp. · HTTP API C57.3/100#616 of 950

Which one, for what

Amazon Ads API C

Good for Agents managing sponsored ads and Amazon DSP for an advertiser or agency that already has API approval, and teams that want a vendor-run MCP server.

Ahead on

  • Schema & documentation, 76 against 64
  • Security & auth, 60 against 48
  • Payments & pricing, 40 against 20
  • Transparency & trust, 73 against 62

Watch for

Access needs an approved application (review may take up to one business day) and an advertiser's consent in a browser

X Ads API C

Good for An agent that manages or reports on X campaigns for an advertiser with an approved developer app, especially through the MCP server, where scopes separate reads from writes and writes start paused.

Ahead on

  • Reliability, 75 against 45

Watch for

No OpenAPI file covers the Ads API. The published file (version 2.170, 178 paths) describes api.x.com only

Score by category

CategoryWeight this runAmazon Ads APIX Ads APIEdge
Reliability16%204575X Ads API +30
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.27664Amazon Ads API +12
Agent ergonomics13%16.26262even
Security & auth14%17.56048Amazon Ads API +12
Payments & pricing10%12.54020Amazon Ads API +20
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.86563Amazon Ads API +2
Transparency & trust7%8.87362Amazon Ads API +11
Negative events≤1500
Total59 · C57.3 · C

Facts side by side

FactAmazon Ads APIX Ads API
KindHTTP APIHTTP API
VendorAmazonX Corp.
Hosted endpointhttps://advertising-api.amazon.comhttps://ads-api.x.com/mcp
TransportsHTTPHTTP
AuthOAuthOAuth
PricingFreeFree
x402nono
LicenceProprietary service under the Amazon Advertising API Licence Agreement. The Postman collections and samples in amzn/ads-advanced-tools-docs are MIT-0Proprietary service under the X Developer Agreement and its incorporated Developer Policy
Read-only variant documentednoyes
llms.txtnoyes
Last release2026-10-052026-09-17
Terms last updatedcouldn't be read2026-04-27
Privacy policy last updated2026-06-30couldn't be read
Customer content may train modelsyesnot found in the text
Terms restrict automated accesscouldn't be readnot found in the text
Terms restrict benchmarkingcouldn't be readyes
Terms or service can change without noticecouldn't be readnot found in the text
Arbitration or class-action waivercouldn't be readyes

Verdicts

Amazon Ads API

Public OpenAPI specifications, test accounts that serve no ads and a six-month shutoff notice policy support agent use. Access needs an approved application and an advertiser's OAuth consent, rate limits are dynamic with no published numbers, and the status feed shows three reporting disruptions since July 2026. The MCP server is in open beta.

X Ads API

Rate limits are published per endpoint type, a sandbox host never serves ads, and the X Ads MCP server has separate read and write scopes and creates campaigns paused. The REST API needs OAuth 1.0a signing and an approved app, no OpenAPI file covers it, and the official Python and Ruby SDKs were last released in May 2022.

Before you call either

Amazon Ads API

  1. Send Amazon-Advertising-API-ClientId and a Bearer access token on every call, and Amazon-Advertising-API-Scope with a profile ID from GET /v2/profiles on most
  2. Call the host for the advertiser's region. advertising-api.amazon.com is North America, advertising-api-eu Europe and advertising-api-fe Far East
  3. Refresh the access token every 60 minutes. Refresh tokens issued from 30 July 2026 expire 365 days after consent
  4. On 429, wait the Retry-After seconds and back off exponentially. Request an export instead of listing every entity
  5. Rehearse writes in a test account, or create campaigns in the PAUSED state, before anything can spend
  6. For MCP, prefer https://advertising-ai.amazon.com/mcp/lite and disable delete tools in the client configuration

X Ads API

  1. Build against https://ads-api-sandbox.x.com/12/ first. Create a test account with POST accounts and a funding instrument there before touching a live account
  2. On HTTP 429 wait until the time in x-rate-limit-reset. On 503 wait for retry-after. The docs say apps that ignore these can be throttled or lose access without notice
  3. Read the account-level limit from x-account-rate-limit-* when present and use x-rate-limit-* only when it is absent
  4. For a read-only MCP session request ads.read offline.access only. Without offline.access the token expires in about two hours with no refresh
  5. Page with count (1 to 1,000, default 200) and cursor until next_cursor is null. Analytics endpoints page by time range instead, and with_total_count cannot be combined with cursor

Questions

Which is better for AI agents, Amazon Ads API or X Ads API?

Amazon Ads API scores 59 (C) on agent readiness against X Ads API's 57.3 (C), and leads in 5 of 7 scored categories. X Ads API leads on reliability.

Do Amazon Ads API and X Ads API need an API key?

Both use an OAuth sign-in.

Can an agent call Amazon Ads API and X Ads API without installing anything?

Yes. Amazon Ads API has a hosted endpoint at https://advertising-api.amazon.com and X Ads API at https://ads-api.x.com/mcp.

Other comparisons with Amazon Ads API or X Ads API

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