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Head to head · Ads reporting · October 2026 research run

Google Ads API vs Meta Marketing API

Google Ads API scores 76.4 (BB) on agent readiness against Meta Marketing API's 67.7 (B), and leads in every scored category. Both do ads reporting.

Google Ads APIGoogle · HTTP API BB76.4/100#30 of 578 Meta Marketing APIMeta Platforms, Inc. · HTTP API B67.7/100#167 of 578

Which one, for what

Google Ads API BB

Good for It suits an agent that reports on or manages Google Ads accounts for an advertiser or agency that can get a Cloud project approved.

Ahead on

  • Schema & documentation, 84 against 76
  • Agent ergonomics, 87 against 77
  • Security & auth, 71 against 61
  • Payments & pricing, 40 against 30
  • Maintenance & community, 87 against 74
  • Transparency & trust, 82 against 68

Also in its favour

  • Agent-ready, a grade of BB or better
  • Runs on your own machine

Watch for

One OAuth scope, adwords, covers reading, editing, creating and deleting. Read-only access depends on the Google Ads user role

Meta Marketing API B

Good for The direct route to Facebook, Instagram, Messenger, WhatsApp and Threads advertising for reporting, campaign and budget changes, audiences and creatives.

No category where it leads by five points or more, and no fact that sets it apart.

Watch for

Default Limited access allows a score of 60 per ad account (read 1, write 3) and blocks for 300 seconds at the limit

Score by category

CategoryWeight this runGoogle Ads APIMeta Marketing APIEdge
Reliability16%208280Google Ads API +2
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28476Google Ads API +8
Agent ergonomics13%16.28777Google Ads API +10
Security & auth14%17.57161Google Ads API +10
Payments & pricing10%12.54030Google Ads API +10
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.88774Google Ads API +13
Transparency & trust7%8.88268Google Ads API +14
Negative events≤1500
Total76.4 · BB67.7 · B

Facts side by side

FactGoogle Ads APIMeta Marketing API
KindHTTP APIHTTP API
VendorGoogleMeta Platforms, Inc.
Hosted endpointhttps://googleads.googleapis.comhttps://graph.facebook.com
TransportsHTTP, stdio, Streamable HTTPHTTP
AuthOAuthOAuth
PricingFreeFree
x402nono
LicenceProprietary service under the Google Ads API terms. The client libraries and the google-ads-mcp server are Apache-2.0Proprietary service under the Meta Platform Terms. The Business SDKs and the codegen specs on GitHub carry Meta's own platform licence, which allows use only with Meta's APIs
Tools exposed3none
Read-only variant documentednoyes
llms.txtnoyes
Last release2026-09-232026-09-21
Terms last updated2019-02-212026-02-03
Privacy policy last updated2026-10-01couldn't be read
Customer content may train modelsyesnot found in the text
Terms restrict automated accessnot found in the textnot found in the text
Terms restrict benchmarkingnot found in the textnot found in the text
Terms or service can change without noticenot found in the textnot found in the text
Arbitration or class-action waiveryesnot found in the text
Popularity753 stars, 3.1M PyPI/wk1.6k stars, 501k npm/wk, 1.1M PyPI/wk

Verdicts

Google Ads API

Test accounts are free and need no approval, and validate_only checks a change without running it. Production access needs a Google Cloud project approved at Explorer level or above and a person to set up OAuth. One OAuth scope covers both reads and writes. The official MCP server is read-only, self-hosted and at version 0.0.4.

Meta Marketing API

Reporting, campaign, budget, audience and creative endpoints sit behind ads_read and ads_management scopes, with a validate_only option and sandbox ad accounts for checking a change before it spends. New apps are held to a score of 60 per ad account, with a 300-second block at the limit, and the documented requests pass the access token as a parameter.

Before you call either

Google Ads API

  1. Send validateOnly: true on a mutate first. It returns errors without making the change. Batch jobs don't support it
  2. Create campaigns with status PAUSED and enable them in a separate step, since an enabled campaign with a budget can spend
  3. Send login-customer-id (digits only, no hyphens) when you reach a client account through a manager account
  4. A failed request still counts against the daily operation quota. Paging with a valid next_page_token doesn't
  5. Wait at least 12 hours between account budget changes on one account, and use the Data Manager API for new Customer Match or offline conversion work

Meta Marketing API

  1. Put a version in every path, such as /v26.0/act_<AD_ACCOUNT_ID>/campaigns. Unversioned Marketing API calls fail
  2. Create campaigns, ad sets and ads with status=PAUSED, and send execution_options=["validate_only"] first to test a write without making it
  3. Ask for ads_read alone when the task is reporting. ads_management can change budgets and activate spend
  4. Read X-Business-Use-Case-Usage and X-Ad-Account-Usage after each call and wait for estimated_time_to_regain_access on errors 17, 613 and 80004
  5. Change an ad set budget at most four times an hour and an account spending limit at most ten times a day

Questions

Which is better for AI agents, Google Ads API or Meta Marketing API?

Google Ads API scores 76.4 (BB) on agent readiness against Meta Marketing API's 67.7 (B), and leads in every scored category.

Do Google Ads API and Meta Marketing API need an API key?

Both use an OAuth sign-in.

Can an agent call Google Ads API and Meta Marketing API without installing anything?

Yes. Google Ads API has a hosted endpoint at https://googleads.googleapis.com and Meta Marketing API at https://graph.facebook.com.

Other comparisons with Google Ads API or Meta Marketing API

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