# ButterCMS vs Ghost

> Ghost scores 58.3 (C) 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-ghost
- Markdown: https://www.anchorterminal.com/compare/buttercms-vs-ghost.md (~2,450 tokens)
- Slim: https://www.anchorterminal.com/compare/buttercms-vs-ghost.min.md (~630 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/buttercms-vs-ghost.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

Ghost scores 58.3 (C) on agent readiness against ButterCMS's 53.3 (D), and leads in 5 of 7 scored categories. ButterCMS leads on 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
- Ghost: grade C, 58.3/100, rank #583 of 950. Markdown https://www.anchorterminal.com/tools/ghost.md · JSON https://www.anchorterminal.com/api/v1/tools/ghost.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:
- Schema & documentation, 78 against 51

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

### Ghost (C)

Good for: A publication, blog or newsletter where an agent drafts posts and a person or a higher role publishes.

Ahead on:
- Agent ergonomics, 69 against 64
- Security & auth, 56 against 36
- Payments & pricing, 50 against 20
- Maintenance & community, 85 against 27
- Transparency & trust, 72 against 51

Also in its favour:
- Open source

Watch for: No OpenAPI or other machine-readable description of the Admin API was found in the docs or the repository


## Score by category

| Category | Weight | ButterCMS | Ghost | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 83 | 80 | ButterCMS +3 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 78 | 51 | ButterCMS +27 |
| Agent ergonomics | 13% (16.2 this run) | 64 | 69 | Ghost +5 |
| Security & auth | 14% (17.5 this run) | 36 | 56 | Ghost +20 |
| Payments & pricing | 10% (12.5 this run) | 20 | 50 | Ghost +30 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 27 | 85 | Ghost +58 |
| Transparency & trust | 7% (8.8 this run) | 51 | 72 | Ghost +21 |
| Negative events | ≤15 | -2 | -7 | |
| **Total** | | **53.3 · D** | **58.3 · C** | |

## Facts side by side

| Fact | ButterCMS | Ghost |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | ButterCMS LLC | Ghost Foundation |
| Hosted endpoint | `https://api.buttercms.com/v2` | no (local only) |
| Transports | HTTP | HTTP |
| Auth | API key | API key |
| Pricing | Freemium | Freemium |
| x402 | no | no |
| Licence | Proprietary service under ButterCMS's terms of service. The SDKs and starter projects on GitHub are MIT | MIT, copyright Ghost Foundation. Ghost(Pro) is a paid hosting service under the Ghost Foundation's terms |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2025-09-04 | 2026-10-07 |
| Terms last updated | no date given | no date given |
| Privacy policy last updated | 2022-08-15 | no date given |
| Customer content may train models | not found in the text | not found in the text |
| Terms restrict automated access | not found in the text | yes |
| 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 | not found in the text | not found in the text |
| Popularity | 6.9k npm/wk | 56k stars, 24k npm/wk |

## 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.

**Ghost.** A create needs only a title, updates are checked against `updated_at` so a stale write is refused, and a Contributor's staff token can draft without being able to publish. The Admin API has no OpenAPI file and one fixed permission set per integration, and 20 security advisories were published between 3 September and 1 October 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

### Ghost

1. Sign a fresh HS256 token for each batch of calls. Decode the hex secret to bytes, set `kid` to the key id, `aud` to `/admin/` and `exp` at most 5 minutes ahead
2. Set `status` to `draft` on every create unless told to publish, and publish later with a PUT that sets `status` to `published`
3. GET the post before each PUT and send its `updated_at` back. Tags and authors in a PUT replace the existing lists
4. Send content as a Lexical JSON string, or add `?source=html` and send `html`. The HTML conversion is lossy unless wrapped in an HTML card
5. Page through lists with `limit` up to 100 and `page`. Since Ghost 6.0 `limit=all` returns 100 items without an error

## Questions

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

Ghost scores 58.3 (C) on agent readiness against ButterCMS's 53.3 (D), and leads in 5 of 7 scored categories. ButterCMS leads on schema & documentation.

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

Both need an API key.

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

ButterCMS has a hosted endpoint at https://api.buttercms.com/v2. No hosted endpoint is listed for Ghost.

### Are ButterCMS and Ghost open source?

No open-source release is listed for ButterCMS. Ghost is open source (MIT, copyright Ghost Foundation. Ghost(Pro) is a paid hosting service under the Ghost Foundation's terms).


## For agents

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

## Other comparisons with ButterCMS or Ghost

- [ButterCMS vs Contentstack](https://www.anchorterminal.com/compare/buttercms-vs-contentstack.md)
- [ButterCMS vs DatoCMS](https://www.anchorterminal.com/compare/buttercms-vs-datocms.md)
- [ButterCMS vs Directus](https://www.anchorterminal.com/compare/buttercms-vs-directus.md)
- [ButterCMS vs Hygraph](https://www.anchorterminal.com/compare/buttercms-vs-hygraph.md)
- [ButterCMS vs Kontent.ai](https://www.anchorterminal.com/compare/buttercms-vs-kontent-ai.md)
- [ButterCMS vs Payload](https://www.anchorterminal.com/compare/buttercms-vs-payload.md)
- [ButterCMS vs Prismic](https://www.anchorterminal.com/compare/buttercms-vs-prismic.md)
- [ButterCMS vs Sanity](https://www.anchorterminal.com/compare/buttercms-vs-sanity.md)
- [ButterCMS vs Storyblok](https://www.anchorterminal.com/compare/buttercms-vs-storyblok.md)
- [ButterCMS vs Strapi](https://www.anchorterminal.com/compare/buttercms-vs-strapi.md)
- [ButterCMS vs Webflow](https://www.anchorterminal.com/compare/buttercms-vs-webflow.md)
- [ButterCMS vs WordPress](https://www.anchorterminal.com/compare/buttercms-vs-wordpress.md)
- [Contentstack vs Ghost](https://www.anchorterminal.com/compare/contentstack-vs-ghost.md)
- [DatoCMS vs Ghost](https://www.anchorterminal.com/compare/datocms-vs-ghost.md)
- [Directus vs Ghost](https://www.anchorterminal.com/compare/directus-vs-ghost.md)
- [Ghost vs Hygraph](https://www.anchorterminal.com/compare/ghost-vs-hygraph.md)
- [Ghost vs Kontent.ai](https://www.anchorterminal.com/compare/ghost-vs-kontent-ai.md)
- [Ghost vs Payload](https://www.anchorterminal.com/compare/ghost-vs-payload.md)
- [Ghost vs Prismic](https://www.anchorterminal.com/compare/ghost-vs-prismic.md)
- [Ghost vs Sanity](https://www.anchorterminal.com/compare/ghost-vs-sanity.md)
- [Ghost vs Storyblok](https://www.anchorterminal.com/compare/ghost-vs-storyblok.md)
- [Ghost vs Strapi](https://www.anchorterminal.com/compare/ghost-vs-strapi.md)
- [Ghost vs Webflow](https://www.anchorterminal.com/compare/ghost-vs-webflow.md)
- [Ghost vs WordPress](https://www.anchorterminal.com/compare/ghost-vs-wordpress.md)