Connect via MCP

Anthra speaks the Model Context Protocol over Streamable HTTP at /api/mcp. Any MCP-compatible client (Claude Desktop, Cursor, Claude Code, Continue, …) can authenticate with one of your personal access tokens and call Anthra’s tools.

Endpoint

URL:    https://anthra.com/api/mcp
Method: POST (JSON-RPC)
Auth:   Authorization: Bearer ant_live_…
Protocol revision: 2025-06-18

Claude Desktop

Edit ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or the equivalent on your OS:

{
  "mcpServers": {
    "anthra": {
      "url": "https://anthra.com/api/mcp",
      "headers": {
        "Authorization": "Bearer ant_live_…"
      }
    }
  }
}

Restart Claude Desktop. You should see anthra appear in the tools list with entries like create_book, generate_outline, write_chapter, and publish_book.

Claude Code

claude mcp add --transport http anthra \
  https://anthra.com/api/mcp \
  --header "Authorization: Bearer ant_live_…"

Cursor

In Cursor’s settings → Tools & Integrations → Add MCP Server:

{
  "mcpServers": {
    "anthra": {
      "url": "https://anthra.com/api/mcp",
      "headers": { "Authorization": "Bearer ant_live_…" }
    }
  }
}

What the model can do

The Anthra MCP server is at full parity with Anthra's in-app writing agent — the same toolkit, exposed over MCP. The model will:

• List, read, create, update, and delete books, chapters, and collaborators (books:read, books:write).
• Drive the planning surface — theme statement, reader promise, comp authors, beat sheet, POV / tense locks, characters with want / fear / lie, inter-character conflicts, premise interview, premise pitches, outline grader, outline variants, genre detect, era research, mood references, outline snapshots.
• Manage the writer's bible — characters, plot outline, theme outline, style guide, worldbuilding, glossary, synopsis, lore, setting bible, era research. Read, write, auto-draft, and roll back via revisions.
• Generate outlines, write chapters, rewrite with a directive, run continuity / cliché / repetition / style-drift / spoken-readability / sensitivity checks, and synthesize narration (generation:run).
• Run the full prose-analysis suite — filter words, adverb density, sensory balance, concrete nouns, POV slippage, tense consistency, sentence rhythm, dialogue tags, body language, semantic clichés, telegraphing, and repetition — then apply the fixes (cadence variations, show-don't-tell rewrites, verb upgrades).
• Convene the specialist / critique panel — call a named specialist, run a critique round-table, skeptic-verify a claim, synthesize as Editor-in-Chief, run a draft tournament, the long-horizon plot doctor, genre-expert lookups, and the debut-reader read.
• Gather reader feedback — a test-reader panel, an emotional-arc map, and hook / ending scoring that reads the book the way a first-timer would.
• Maintain worldbuilding & continuity — world rules, timeline / geography / weather / travel-time checks, unit consistency, invented terms & calendars, the foreshadowing ledger, object & location trackers, scene-consistency checks, and continuity diffs.
• Sharpen character craft — the want / fear / lie roster and conflict matrix, plus dialogue fingerprints, per-character voice consistency, and character-arc tracking.
• Do persona & structural editing — track-changes edits with built-in or saved editor personas, sentence variants, tense / POV flips, voice transplant, cut-by-percent, expand, reverse-outline, scene cards, and a synopsis — each landing as a reviewable suggestion you accept or reject.
• Grade with scorecards & eval exemplars, and triage the ideas inbox (capture / organise / status).
• Collaborate — manage collaborators, hand out chapter assignments, and read the activity feed for a multi-author book.
• Cover & production — choose cover color, generate cover / back cover / spine / chapter images, compose the print-ready wraparound spread, render the manuscript to EPUB / DOCX / PDF, export to Markdown, batch-narrate every chapter, and translate the book into another language.
• Chapter restructuring — list, edit, split, merge, reorder chapters and roll back to any saved revision.
• List the narration voice catalog (list_voices) to pick a voice before kicking off narration.
• Publish books and toggle visibility (publish:write).
• Read account usage, background-job status, and reader analytics (account:read, analytics:read).

Tools that mutate or spend tokens are gated behind their scope — a key without generation:run can still let the model list and read your books but won’t allow generation.

Recommended scopes for a chat-only client

books:read
books:write
generation:run
publish:write

Add account:read and analytics:read if you want the model to reason about spend or reader behaviour.

See the full tool reference for every operation, its arguments, and which scope it requires.