# ButterCMS vs WordPress

> WordPress scores 64.8 (B) to ButterCMS's 53.3 (D) for content management. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/buttercms-vs-wordpress
- Markdown: https://www.anchorterminal.com/compare/buttercms-vs-wordpress.md (~2,500 tokens)
- Slim: https://www.anchorterminal.com/compare/buttercms-vs-wordpress.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/buttercms-vs-wordpress.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

WordPress scores 64.8 (B) on agent readiness against ButterCMS's 53.3 (D), and leads in 5 of 7 scored categories. ButterCMS leads on reliability and schema & documentation. Both do content management.

- ButterCMS: grade D, 53.3/100, rank #711 of 950. Markdown https://www.anchorterminal.com/tools/buttercms.md · JSON https://www.anchorterminal.com/api/v1/tools/buttercms.json
- WordPress: grade B, 64.8/100, rank #341 of 950. Markdown https://www.anchorterminal.com/tools/wordpress.md · JSON https://www.anchorterminal.com/api/v1/tools/wordpress.json
- Best headless CMS and website publishing for AI agents: https://www.anchorterminal.com/best/cms/index.md
- All 91 cms comparisons: https://www.anchorterminal.com/compare/cms/index.md

## Which one, for what

### ButterCMS (D)

Good for: A team already on a paid ButterCMS plan that wants an agent to draft and publish pages, collection items and blog posts in small volumes.

Ahead on:
- Reliability, 83 against 78
- Schema & documentation, 78 against 65

Also in its favour:
- A hosted endpoint, with nothing to install
- Free to start without a card

Watch for: The Write API is a paid add-on on Advanced ($249 a month) and Professional ($399), capped at 2,000 and 5,000 write calls a month. Its price is not published

### WordPress (B)

Good for: Sites that already run WordPress, where an agent drafts posts and uploads media under a Contributor or Author account and a person publishes.

Ahead on:
- Agent ergonomics, 74 against 64
- Security & auth, 62 against 36
- Payments & pricing, 60 against 20
- Maintenance & community, 83 against 27
- Transparency & trust, 68 against 51

Also in its favour:
- Runs on your own machine
- Open source

Watch for: Application Passwords have no scopes or expiry. Each one carries every capability of its user


## Score by category

| Category | Weight | ButterCMS | WordPress | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 83 | 78 | ButterCMS +5 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 78 | 65 | ButterCMS +13 |
| Agent ergonomics | 13% (16.2 this run) | 64 | 74 | WordPress +10 |
| Security & auth | 14% (17.5 this run) | 36 | 62 | WordPress +26 |
| Payments & pricing | 10% (12.5 this run) | 20 | 60 | WordPress +40 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 27 | 83 | WordPress +56 |
| Transparency & trust | 7% (8.8 this run) | 51 | 68 | WordPress +17 |
| Negative events | ≤15 | -2 | -5 | |
| **Total** | | **53.3 · D** | **64.8 · B** | |

## Facts side by side

| Fact | ButterCMS | WordPress |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | ButterCMS LLC | WordPress.org (open-source project) |
| Hosted endpoint | `https://api.buttercms.com/v2` | no (local only) |
| Transports | HTTP | HTTP, stdio |
| Auth | API key | API key |
| Pricing | Freemium | Free |
| x402 | no | no |
| Licence | Proprietary service under ButterCMS's terms of service. The SDKs and starter projects on GitHub are MIT | GPL-2.0-or-later. The MCP Adapter plugin is GPL-2.0-or-later too |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2025-09-04 | 2026-10-06 |
| Terms last updated | no date given | no document linked |
| Privacy policy last updated | 2022-08-15 | no date given |
| Customer content may train models | not found in the text |  |
| Terms restrict automated access | not found in the text |  |
| Terms restrict benchmarking | not found in the text |  |
| Terms or service can change without notice | not found in the text |  |
| Arbitration or class-action waiver | not found in the text |  |
| Popularity | 6.9k npm/wk | 21k stars |

## Verdicts

**ButterCMS.** The Read and Write APIs have a public OpenAPI 3.1 file, Markdown docs and a status page with no incident since October 2025. The Write API is a paid add-on from the $249 plan, capped at 2,000 or 5,000 calls a month. Writes answer 202 with no identifier, support rotates tokens, and the terms are an undated website document.

**WordPress.** The REST API is part of core, and a post created without a status is saved as a draft with revisions kept on the owner's server. Application Passwords carry no scopes, so limits come only from the user's role. Revisions can be read and deleted but not restored over REST, and a critical flaw was fixed on 22 September 2026.

## Before you call either

### ButterCMS

1. End every path with a slash. A missing slash returns a 301, and the vendor counts the redirect and the retry as two API calls
2. Send the write token only as `Authorization: Token <token>`. The `auth_token` query parameter works for reads only
3. On page creation send every field key of the page type, with empty strings for fields left blank
4. A 202 means queued, not saved. Read the entry back with `preview=1` to confirm, and check a slug exists before retrying a create
5. Call the REST API directly for writes. The JavaScript SDK 3.0.3 has list, retrieve and search methods only

### WordPress

1. Ask the owner for a dedicated user with the lowest role that fits. A Contributor can draft and edit its own posts but can't publish them
2. Send the Application Password as Basic auth over HTTPS only. Core disables Application Passwords on plain HTTP outside a local environment
3. Upload a file with POST `/wp-json/wp/v2/media` first, then set `featured_media` or reference the returned URL in the post content
4. To roll back, GET `/wp/v2/posts/<id>/revisions/<rev>?context=edit` and POST its title and content to the post. There's no restore route
5. Pass `_fields=id,status,link,modified` on lists and read X-WP-TotalPages. `per_page` stops at 100

## Questions

### Which is better for AI agents, ButterCMS or WordPress?

WordPress scores 64.8 (B) on agent readiness against ButterCMS's 53.3 (D), and leads in 5 of 7 scored categories. ButterCMS leads on reliability and schema & documentation.

### Do ButterCMS and WordPress need an API key?

Both need an API key.

### Can an agent call ButterCMS and WordPress without installing anything?

ButterCMS has a hosted endpoint at https://api.buttercms.com/v2. WordPress runs on your own machine, with no hosted endpoint listed.

### Are ButterCMS and WordPress open source?

No open-source release is listed for ButterCMS. WordPress is open source (GPL-2.0-or-later. The MCP Adapter plugin is GPL-2.0-or-later too).


## For agents

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

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