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Specter for Ghost
Specter pulls your Ghost blog down to a folder of local markdown. Now Claude, ChatGPT, Gemini — or your own scripts — can read every post at once, rewrite at scale, and Specter streams the changes back over the Ghost Admin API.
Ghost 5.x · self-hosted or Ghost(Pro) · macOS 13+ · paid official app · free forever on GitHub.
Also for: WordPress → · Shopify → · Webflow →
Why Ghost users reach for Specter
The Ghost web editor is built for writing a single post. The Admin API is fine for one-off scripts but rate-limits hard on bulk runs. And the "AI for Ghost" plugins on the market are mostly closed-loop GPT wrappers that charge per article and only ever see one post at a time. Specter breaks that ceiling: your whole Ghost blog becomes a folder of markdown that any tool can read at once, then Specter streams the changes back over the Admin API — without the timeouts.
What you can do
Specter isn’t an AI and it isn’t a CMS. It does one thing: keep your live Ghost blog and a folder of local markdown perfectly in sync — so every other tool you own can finally reach your content, all of it, at once.
Your whole Ghost blog lives in one folder of plain markdown. Point Claude Code, Cursor, or any agent at that folder and the AI sees every post — so it can weave accurate internal links, match your tone across the archive, and stop generating duplicates.
Run an AI pass across thousands of posts — rewrite meta descriptions, fix outdated mentions, regenerate SEO titles, swap CTAs. Specter streams the result back through the Ghost Admin API in the background without throttling.
Hand the folder to any LLM and translate every post into five languages, preserving Ghost tags, feature images, and slugs.
Claude, ChatGPT, Gemini, Copilot, your own scripts — they all read the same markdown on disk. Specter is the bridge; you bring the intelligence.
Edit locally → Specter pushes. Edit in the Ghost admin → Specter pulls down. Every post round-trips with frontmatter, tags, and authors preserved.
Click Preview Sync and see exactly which Ghost posts would be created, updated, or flagged as conflicts. Essential before a 1,000-post AI edit goes live.
Point Specter at a folder inside your Obsidian vault and the two coexist. If you used the old Obsidian Ghost-sync plugin, Specter is a strict upgrade.
Stored in the macOS Keychain. No cloud middleman, no third-party server, no telemetry on your content. Revoke from your Ghost admin any time.
How it works on Ghost
Step
In Ghost: Settings → Advanced → Integrations → Add custom integration. Copy the Admin API key. Walkthrough →
Step
Open Specter, add a Ghost blog, paste your blog URL + Admin API key. Specter tests the connection before continuing. Connect Specter to Ghost →
Step
One picker. The folder you choose is where your Ghost posts live as markdown. Open them in Obsidian or VS Code, or hand the whole folder to Claude for a bulk edit. Save. Specter pushes back.
What round-trips today
Specter syncs the text content of your Ghost blog — body, frontmatter, tags, authors, scheduled status. Members, newsletters, themes, and Stripe are deliberately out of scope.
Post body (markdown ↔ Ghost Lexical), title, slug, status (draft/published/scheduled), publish date, tags, authors, custom excerpt, feature image URL, feature image alt, codeinjection_head, codeinjection_foot, canonical URL, meta title, meta description, OG title, OG description, Twitter title, Twitter description, visibility (public/members/paid).
Members, subscribers, newsletter sends, Stripe keys, themes, routes.yaml, integrations other than its own, redirects, staff users. Read the full capability matrix → for the exact, current state.
Pricing
Buy the signed, supported app, or use the open-source GitHub project for free forever.
FAQ
Buy the official app, or build the free open-source version.
Guides
Hand-picked walkthroughs for the things people actually do with Specter on Ghost.
Guide
Add a CTA, affiliate disclosure, or footer to all your blog posts: sync to local markdown with Specter, append the block across the archive, preview, and sync back.
Read guide →Guide
Bulk edit Ghost tags and clean up a messy taxonomy: sync posts to local markdown with Specter, normalize tags across the archive with AI, preview, and sync back.
Read guide →Guide
Connect Ghost markdown sync in minutes: paste your site URL and Admin API key, test, pick a folder, and run your Ghost CMS first sync to pull posts.
Read guide →Guide
Keep your blog style guide consistent at scale: sync Ghost posts to local markdown with Specter, apply voice and formatting rules with AI, review, and sync back.
Read guide →Guide
Update outdated blog content at scale: sync your Ghost posts to local markdown with Specter, run an AI audit to flag stale facts and dates, review, and sync back.
Read guide →Guide
Generate Ghost meta descriptions in bulk with AI: sync posts to local markdown with Specter, fill in missing excerpts across the archive, preview, and sync back.
Read guide →Guide
Bulk Ghost internal linking: sync your blog to local markdown, use AI to add contextual links and fix broken ones across every post, preview, and sync back.
Read guide →Guide
Ghost version history is limited to a few recent edits per post. Sync your posts to local markdown with Specter and put the folder under git for real history.
Read guide →Comparisons
Comparison
A Ghost AI writer alternative: instead of autogenerating content, bring your own AI to edit your existing Ghost posts locally, keep your voice and control.
Read comparison →Comparison
Ghost markdown editing in your own tools vs the browser editor. A fair comparison of when each wins, and how to get local markdown with Ghost.
Read comparison →Comparison
Obsidian Publish turns your vault into a website; Ghost is a full publishing platform with newsletters and memberships. Here's how they compare — and how to keep writing in Obsidian while publishing to Ghost.
Read comparison →Comparison
The Obsidian Ghost Publish plugin pushes notes to Ghost one way. Specter syncs your whole Ghost blog with local markdown both ways — with conflict prompts and a dry-run preview. Here's the side-by-side.
Read comparison →Comparison
Looking for a Ulysses Ghost alternative or iA Writer Ghost sync that round-trips existing posts? Here is where each app stops and where Specter fits.
Read comparison →Comparison
You can script the Ghost Admin API to sync posts to markdown yourself. Here's the build-vs-buy on what a robust two-way ghost api sync actually takes.
Read comparison →Troubleshooting
Specter also supports
Platform
Self-hosted WP or WordPress.com Business+, via Application Passwords and the REST API.
Explore WordPress →Platform
Edit your Shopify store blog and articles in markdown. Articles and blogs only — never orders or customers.
Explore Shopify →Platform · Beta
Any Webflow plan with the CMS. OAuth scoped to CMS read/write — the Designer, components, and Ecommerce stay untouched.
Explore Webflow →