# LinkedIn Marketing APIs vs X Ads API

> LinkedIn Marketing scores 62.4 (B) to X Ads's 57.3 (C) for ad reporting. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/linkedin-marketing-api-vs-x-ads
- Markdown: https://www.anchorterminal.com/compare/linkedin-marketing-api-vs-x-ads.md (~2,400 tokens)
- Slim: https://www.anchorterminal.com/compare/linkedin-marketing-api-vs-x-ads.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/linkedin-marketing-api-vs-x-ads.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: 2026-10-09

LinkedIn Marketing APIs scores 62.4 (B) on agent readiness against X Ads API's 57.3 (C), and leads in 6 of 7 scored categories. X Ads API leads on reliability. Both do ad reporting.

- LinkedIn Marketing APIs: grade B, 62.4/100, rank #434 of 950. Markdown https://www.anchorterminal.com/tools/linkedin-marketing-api.md · JSON https://www.anchorterminal.com/api/v1/tools/linkedin-marketing-api.json
- X Ads API: grade C, 57.3/100, rank #616 of 950. Markdown https://www.anchorterminal.com/tools/x-ads.md · JSON https://www.anchorterminal.com/api/v1/tools/x-ads.json
- Best advertising platform APIs for AI agents: https://www.anchorterminal.com/best/advertising/index.md
- All 28 advertising comparisons: https://www.anchorterminal.com/compare/advertising/index.md

## Which one, for what

### LinkedIn Marketing APIs (B)

Good for: An agent that reports on and manages LinkedIn campaigns for accounts its operator administers, especially read-only reporting, which has no account limit on Development tier.

Ahead on:
- Security & auth, 66 against 48
- Payments & pricing, 30 against 20
- Transparency & trust, 84 against 62

Watch for: Standard rate limits are not published. An app sees its limit in the Developer Portal only after calling the endpoint

### 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 66

Also in its favour:
- A hosted endpoint, with nothing to install

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

| Category | Weight | LinkedIn Marketing APIs | X Ads API | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 66 | 75 | X Ads API +9 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 66 | 64 | LinkedIn Marketing APIs +2 |
| Agent ergonomics | 13% (16.2 this run) | 63 | 62 | LinkedIn Marketing APIs +1 |
| Security & auth | 14% (17.5 this run) | 66 | 48 | LinkedIn Marketing APIs +18 |
| Payments & pricing | 10% (12.5 this run) | 30 | 20 | LinkedIn Marketing APIs +10 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 64 | 63 | LinkedIn Marketing APIs +1 |
| Transparency & trust | 7% (8.8 this run) | 84 | 62 | LinkedIn Marketing APIs +22 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **62.4 · B** | **57.3 · C** | |

## Facts side by side

| Fact | LinkedIn Marketing APIs | X Ads API |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | LinkedIn Corporation | X Corp. |
| Hosted endpoint | no (local only) | `https://ads-api.x.com/mcp` |
| Transports | HTTP | HTTP |
| Auth | OAuth | OAuth |
| Pricing | Free | Free |
| x402 | no | no |
| Licence | Proprietary service under the LinkedIn API terms of use and the Marketing API terms. The beta Python and JavaScript clients carry LinkedIn's API development software licence | Proprietary service under the X Developer Agreement and its incorporated Developer Policy |
| Read-only variant documented | yes | yes |
| llms.txt | no | yes |
| Last release | 2026-09-16 | 2026-09-17 |
| Terms last updated | couldn't be read | 2026-04-27 |
| Privacy policy last updated | couldn't be read | couldn't be read |
| Customer content may train models | couldn't be read | not found in the text |
| Terms restrict automated access | couldn't be read | not found in the text |
| Terms restrict benchmarking | couldn't be read | yes |
| Terms or service can change without notice | couldn't be read | not found in the text |
| Arbitration or class-action waiver | couldn't be read | yes |
| Popularity | 25k npm/wk, 386k PyPI/wk | none |

## Verdicts

**LinkedIn Marketing APIs.** Monthly API versions are each supported for at least a year, with dated sunsets and a changelog, and a test ad account lets an agent create campaigns that are never served or billed. Access needs LinkedIn's approval and a member's OAuth consent, standard rate limits are not published, and no OpenAPI specification was found.

**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

### LinkedIn Marketing APIs

1. Send `Linkedin-Version: YYYYMM` and `X-Restli-Protocol-Version: 2.0.0` on every call. A missing or sunset version returns an error (426 for a deprecated one)
2. Create one test ad account with `"test": true` and build there first. Its creatives are auto-rejected and never billed, and it returns no reporting data
3. Create campaigns as DRAFT or PAUSED and check `servingStatuses` before activating. Some validation is postponed until activation
4. Pass `fields=` on adAnalytics. Responses stop at 15,000 elements and the endpoint throttles at 45 million metric values per 5 minutes
5. On Development tier, map each ad account to the app in the Developer Portal. Edits are limited to five accounts

### 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, LinkedIn Marketing APIs or X Ads API?

LinkedIn Marketing APIs scores 62.4 (B) on agent readiness against X Ads API's 57.3 (C), and leads in 6 of 7 scored categories. X Ads API leads on reliability.

### Do LinkedIn Marketing APIs and X Ads API need an API key?

Both use an OAuth sign-in.

### Can an agent call LinkedIn Marketing APIs and X Ads API without installing anything?

No hosted endpoint is listed for LinkedIn Marketing APIs. X Ads API has a hosted endpoint at https://ads-api.x.com/mcp.


## For agents

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

## Other comparisons with LinkedIn Marketing APIs or X Ads API

- [Amazon Ads API vs LinkedIn Marketing APIs](https://www.anchorterminal.com/compare/amazon-ads-api-vs-linkedin-marketing-api.md)
- [Amazon Ads API vs X Ads API](https://www.anchorterminal.com/compare/amazon-ads-api-vs-x-ads.md)
- [Apple Ads Platform API vs LinkedIn Marketing APIs](https://www.anchorterminal.com/compare/apple-ads-vs-linkedin-marketing-api.md)
- [Apple Ads Platform API vs X Ads API](https://www.anchorterminal.com/compare/apple-ads-vs-x-ads.md)
- [Google Ads API vs LinkedIn Marketing APIs](https://www.anchorterminal.com/compare/google-ads-api-vs-linkedin-marketing-api.md)
- [Google Ads API vs X Ads API](https://www.anchorterminal.com/compare/google-ads-api-vs-x-ads.md)
- [LinkedIn Marketing APIs vs Meta Marketing API](https://www.anchorterminal.com/compare/linkedin-marketing-api-vs-meta-marketing-api.md)
- [LinkedIn Marketing APIs vs Microsoft Advertising API](https://www.anchorterminal.com/compare/linkedin-marketing-api-vs-microsoft-advertising-api.md)
- [LinkedIn Marketing APIs vs Snapchat Ads API](https://www.anchorterminal.com/compare/linkedin-marketing-api-vs-snapchat-ads.md)
- [Meta Marketing API vs X Ads API](https://www.anchorterminal.com/compare/meta-marketing-api-vs-x-ads.md)
- [Microsoft Advertising API vs X Ads API](https://www.anchorterminal.com/compare/microsoft-advertising-api-vs-x-ads.md)
- [Snapchat Ads API vs X Ads API](https://www.anchorterminal.com/compare/snapchat-ads-vs-x-ads.md)