Prose Coach MCP¶

Remote MCP server (Streamable HTTP, no auth) for Prose Coach. A deterministic writing filter that marks 43 patterns that make text read as AI-generated — banned vocabulary and structural tells (triplets, negation formulas, summary closers, colon chains, flat rhythm) — with every finding quoting the line that triggered it and attaching the fix.

Server type: Remote (Streamable HTTP)
Auth: None
Endpoint: https://www.prose.coach/mcp
Pricing: Free tier (3 drafts/day, 12,000 chars per request); PRO $5/mo or $50/yr
Category: Content / Writing

Why This Matters for Operators¶

Every AI assistant reaches for the same moves across every draft. Prose Coach is the first MCP purpose-built to de-AI drafts before they ship: a fixed rule set runs over your text, flags what's there, and density is scored against an accumulation threshold — one marker is noise, six is a habit. Because no language model reads your text, the same input always returns the same findings — unlike probabilistic "99% AI-written" detectors whose scores can't be checked against anything.

Tools & Capabilities¶

Tool	Tier	What it returns
`scan_draft`	Free	Every finding with the line quoted and the fix attached
`coach_draft`	PRO	Scan + the written rule behind each finding, scope map for content type, judgment layers
`verify_revision`	PRO	Before/after diff: patterns resolved, reduced, still present, or newly introduced

Two prompts (scan, polish) ship alongside the tools. Re-scanning a draft after edits doesn't count against the free daily limit.

Installation¶

claude mcp add prose-coach --transport http https://www.prose.coach/mcp

Per-client walkthroughs (Claude Code, Codex, Cursor, VS Code): prose.coach/connect

Configuration¶

{
  "mcpServers": {
    "prose-coach": {
      "type": "http",
      "url": "https://www.prose.coach/mcp"
    }
  }
}

No API key. A browser scanner at prose.coach runs the same engine if you want to try it before connecting anything.

Business Relevance¶

Marketing teams can run every email, ad, and social post through scan_draft before it ships — structural tells (triplets, summary closers) are exactly what makes mass-produced AI copy feel uncanny
Content operators get a free tier covering 3 drafts/day — enough for daily posting cadences without a subscription
Founders and executives get a deterministic filter instead of an opaque AI-probability score they can't verify
Agencies can standardize voice at scale — PRO ($5/mo) gates verify_revision, which diffs the rewrite against the original

Integration with CorpusIQ¶

Prose Coach pairs with CorpusIQ's business-data connectors on the content side of the stack: an agent pulls live numbers (Shopify orders, GA4 traffic, ad spend) through CorpusIQ, drafts customer-facing copy from that data, then runs the draft through Prose Coach before anything ships. CorpusIQ supplies the data; Prose Coach polishes the prose. The composition is natural for the same workflows covered by CorpusIQ's content-ops tooling: weekly performance recaps, customer win emails, and product update posts — all drafted by agents, all passed through a deterministic writing filter before they reach a human.

Limitations¶

Brand new — listed on mcp.so Aug 12, 2026, no ecosystem track record yet
Free tier is a single tool (scan_draft); coach_draft and verify_revision require PRO
The 43-pattern rule set targets English-language writing moves
It flags patterns and attaches fixes — it does not rewrite; the revision happens in your client
Hosted endpoint only (no self-hosted option); no auth means no account-scoped history