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Prompt.Monster
MCP · REST API · OpenAPI

Use Prompt.Monster from inside your editor

With the MCP server and the REST API, turn an idea into a master build prompt and agent files without leaving Claude Code, Cursor, VS Code, Windsurf, Claude Desktop or ChatGPT. Prompt generation is free and works without a key.

Get an API key OpenAPI 3.1 schema

Start in 3 steps

  1. 1

    Get a key (optional)

    Create an API key in your account. Without a key the Free limits apply; AI refine and file exports need one.

  2. 2

    Add the MCP server

    Pick your tool below — one command or a small JSON block.

  3. 3

    Just ask

    Say “use prompt-monster to create a build prompt for an AI invoicing app for freelancers” — or run /mcp__prompt-monster__new_project in Claude Code.

Setup

MCP endpoint: https://prompter.monster/api/mcp
Terminal
claude mcp add --transport http prompt-monster https://prompter.monster/api/mcp \
  --header "Authorization: Bearer pm_live_YOUR_KEY"

Add --scope user to use it in every project. Check the connection with /mcp; the /mcp__prompt-monster__new_project command turns an idea into a prompt.

MCP tools

TOOLNEEDS
generate_build_prompt

Builds the master build prompt (or one prompt per expert) from the idea. Deterministic, no credits.

Free
list_project_types

Lists project types (id, name, category, description).

Free
get_type_preset

A type's preset: experts, stack, v1 features, payments, monetization.

Free
list_experts

Lists the 18 expert personas.

Free
export_files

Returns AGENTS.md, CLAUDE.md, .claude/agents, Cursor rules, Copilot instructions and a Task Master PRD.

Key + Pro
get_shared_prompt

Fetches a prompt shared at /p/….

Free
refine_prompt

Claude rewrites the prompt into a better version with the same structure.

Key · 3 credits

Project files (export_files · Pro)

The files coding agents read every session — generated from your idea in one go, ready to write to the repo root.

  • AGENTS.md

    Codex · Cursor · Jules · Amp · Copilot — The shared instructions file every agent reads

  • CLAUDE.md

    Claude Code — Read by Claude Code every session

  • .claude/agents/*.md

    Claude Code — One subagent per expert

  • .cursor/rules/*.mdc

    Cursor — Cursor's current rules format

  • .cursorrules

    Cursor · Windsurf — Classic rules file

  • copilot-instructions.md

    GitHub Copilot — Copilot repository instructions

  • Task Master prd.txt

    Task Master AI — PRD → tasks with task-master parse-prd

  • prompt-monster.json

    API / automation — All inputs and prompts, structured

REST API

Same engine, plain HTTP. Responses are { data } or { error: { code, message } }. Base URL: https://prompter.monster/api/v1

METHODPATH
GET/types

Project types (?lang=EN|TR)

GET/types/{id}

A type's preset

POST/generate

Master prompt · expert prompts · Pro: files

POST/refine

Refine with Claude (credits)

GET/shared/{slug}

A shared prompt

OpenAPI 3.1 schema · Authorization: Bearer pm_live_…

Plans and limits

Free (also keyless)
3 experts · ChatGPT Markdown and Claude XML · 5 AI credits a day (with a key)
Monster Pro
18 experts · 5 formats · project files · 1000 AI credits a month (≤150 a day)
Credits
Prompt generation 0 · refine_prompt 3 credits
Rate
30 requests a minute with a key, 10 without (MCP counts tool calls only)

Security

  • • We never store the key itself — only its SHA-256 hash — and show it once.
  • • Revoke a key any time; up to 5 active keys.
  • • Don't commit keys to a repository; the VS Code setup asks for the key in a secure input.
  • • AI calls are charged to the key owner's plan and show up in the usage history.

Error codes

401key_required, invalid_key

Key missing, invalid or revoked

403pro_format, pro_files, banned

Plan limit or suspended account

429rate_limited

Per-minute limit or AI credits used up

502ai_failed

The AI call failed — no credits used

503api_disabled, mcp_disabled, maintenance

Temporarily off

Create your key and connect in 2 minutes

Summary for agents: /llms.txt

Get an API key