# 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. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/google-ads-api-vs-meta-marketing-api
- Markdown: https://www.anchorterminal.com/compare/google-ads-api-vs-meta-marketing-api.md (~2,150 tokens)
- Slim: https://www.anchorterminal.com/compare/google-ads-api-vs-meta-marketing-api.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/google-ads-api-vs-meta-marketing-api.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-08

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 API: grade BB, 76.4/100, rank #31 of 722. Markdown https://www.anchorterminal.com/tools/google-ads-api.md · JSON https://www.anchorterminal.com/api/v1/tools/google-ads-api.json
- Meta Marketing API: grade B, 67.7/100, rank #201 of 722. Markdown https://www.anchorterminal.com/tools/meta-marketing-api.md · JSON https://www.anchorterminal.com/api/v1/tools/meta-marketing-api.json

## 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.

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

| Category | Weight | Google Ads API | Meta Marketing API | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 82 | 80 | Google Ads API +2 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 84 | 76 | Google Ads API +8 |
| Agent ergonomics | 13% (16.2 this run) | 87 | 77 | Google Ads API +10 |
| Security & auth | 14% (17.5 this run) | 71 | 61 | Google Ads API +10 |
| Payments & pricing | 10% (12.5 this run) | 40 | 30 | Google Ads API +10 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 87 | 74 | Google Ads API +13 |
| Transparency & trust | 7% (8.8 this run) | 82 | 68 | Google Ads API +14 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **76.4 · BB** | **67.7 · B** | |

## Facts side by side

| Fact | Google Ads API | Meta Marketing API |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Google | Meta Platforms, Inc. |
| Hosted endpoint | `https://googleads.googleapis.com` | `https://graph.facebook.com` |
| Transports | HTTP, stdio, Streamable HTTP | HTTP |
| Auth | OAuth | OAuth |
| Pricing | Free | Free |
| x402 | no | no |
| Licence | Proprietary service under the Google Ads API terms. The client libraries and the google-ads-mcp server are Apache-2.0 | Proprietary 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 exposed | 3 | none |
| Read-only variant documented | no | yes |
| llms.txt | no | yes |
| Last release | 2026-09-23 | 2026-09-21 |
| Terms last updated | 2019-02-21 | 2026-02-03 |
| Privacy policy last updated | 2026-10-01 | couldn't be read |
| Customer content may train models | yes | not found in the text |
| Terms restrict automated access | not found in the text | not found in the text |
| Terms restrict benchmarking | not found in the text | not found in the text |
| Terms or service can change without notice | not found in the text | not found in the text |
| Arbitration or class-action waiver | yes | not found in the text |
| Popularity | 753 stars, 3.1M PyPI/wk | 1.6k 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.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/google-ads-api-vs-meta-marketing-api.json, and with the fewest tokens: https://www.anchorterminal.com/compare/google-ads-api-vs-meta-marketing-api.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "google-ads-api", "b": "meta-marketing-api"}`. From a terminal: `anchor compare google-ads-api meta-marketing-api`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/google-ads-api.json and https://www.anchorterminal.com/api/v1/tools/meta-marketing-api.json

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