AI Tool

Mantyl Review

Mantyl is a CLI tool for AI-first builders that facilitates the handover of AI-built software with verifiable proof of independence through a project passport.

shipped Sep 1, 2026agentsfreemium

agentscode

Why it matters

1Offers a free local-first CLI with no account required for unlimited projects.

2Supports multiple AI agents including Claude Code, Cursor, OpenAI Codex, and Gemini.

3Generates a verified project passport by compiling repository, coding-agent history, and executed checks.

4Provides independent verification of delivered projects, enhancing trust in AI-assisted builds.

About Mantyl

Business Model

Freemium SaaS

Usage Pricing

£19–£49 per project

Headquarters

Platforms

CLI

Target Audience

AI-first builders, software developers

Pricing Plans

CLI

£0 FOREVER / lifetime

• Local-first CLI
• Unlimited projects
• Scan, verify, generate and receive
• passport.json stays an open format

Hosted passports

£0 DURING ALPHA / lifetime

• One command publishes an approved passport
• Shareable link with the full report
• Server re-checks schema and digest
• Unpublish any time with your delete token

Mantyl Verified

£19–£49 PER PROJECT, BY SIZE / per project

• Independent re-execution on clean infrastructure
• Every recorded check reproduced in a fresh sandbox
• Signed accreditation, publicly checkable offline
• The mark on your hosted passport

Cost Examples

• One credit per project

Leadership

Joel Parfitt

Specs

API Docs

View Documentation →

GitHub

View Repository →

API Available

Yes, public API

overview

What is Mantyl?

Mantyl is an AI tool developed by Joel Parfitt that enables AI-first builders to hand over AI-built software along with proof of independence through a verified project passport. It compiles a project's repository, coding-agent history, and executed checks into a handover document, allowing recipients to independently re-run and verify the software. This addresses the 'transfer debt' associated with rapidly developed AI software by creating a verifiable artifact of a project's state and history. Mantyl's design emphasizes deterministic checks and an 'evidence chain' over mere generated prose, supporting accountability and clarity in AI-assisted projects.

features

Key Features of Mantyl

Mantyl provides a suite of features designed to streamline the handover and verification of AI-built software projects. Its core functionality revolves around generating a 'project passport' that encapsulates critical project data and history.

Free local-first CLI for unlimited project scanning, verification, and passport generation.
No account required for CLI usage, ensuring immediate access and privacy.
Generates a verified project passport by compiling repository, coding-agent history, and executed checks.
Enables independent verification of delivered projects, fostering trust and transparency.
Supports multiple AI agents, including Claude Code, OpenAI, Gemini, Cursor, Codex, and Lovable, by reading their local session stores.
Offers open_standard function calling capabilities.
Supports multimodality, processing both text and audio data.
Integrates with Docker for reproducing project setups and executing checks in isolated sandboxes.
Provides evidence and transparency for AI-assisted builds to clients.

use cases

Who Should Use Mantyl?

Mantyl is primarily designed for AI-first builders, freelancers, and agencies involved in developing and delivering software with AI assistance. It addresses the challenges of trust, transparency, and transfer debt in AI-driven development workflows.

Freelancers & AI-first Builders: For producing verified handover documents for AI-built software and transferring ownership with verifiable proof to clients.
Clients Receiving AI-built Software: To independently verify delivered projects, analyze codebases, and build interactive knowledge graphs of projects.
Agencies & Development Teams: For shipping AI-assisted client work with consistent delivery standards and providing evidence for AI-assisted builds.
Micro SaaS Sellers & Project Archivers: To sell AI-built micro SaaS with increased buyer confidence or archive projects for future self-use with verified setups.
Onboarding & Offboarding Scenarios: For onboarding new technical hires to AI-built products with a clear codebase map, or for contractor offboarding with proof of delivery.

how to use

How to Use Mantyl

Mantyl operates as a command-line interface (CLI) tool, allowing users to generate project passports locally without requiring an account. The process involves scanning a project's repository and AI agent history, then compiling this data into a verifiable handover document.

1Install the Mantyl CLI tool on your local machine.
2Navigate to your project's root directory in the terminal.
3Run Mantyl commands to scan your repository and detect coding-agent history.
4Execute project checks within a clean, isolated sandbox, potentially leveraging Docker integration.
5Generate the 'project passport' document, which includes compiled repo data, agent history, and check results.
6Share the verified project passport with clients or other developers for independent verification.

pricing

Mantyl Pricing & Plans

Mantyl operates on a freemium model, offering a free CLI for local operations and tiered pricing for its 'Verified' service and hosted passports. The 'Mantyl Verified' service transitioned from free alpha to a paid model on August 28, 2026.

CLI: £0 FOREVER. Includes unlimited local project scanning, verification, and passport generation.
Hosted Passports: £0 DURING ALPHA. Provides hosting for generated project passports.
Mantyl Verified: £19–£49 PER PROJECT, BY SIZE. This service costs one credit per project for verification, with pricing varying based on project size.

Pros

+Provides verifiable proof of independence for AI-built software, enhancing trust.
+Automates the compilation of repository data, coding-agent history, and executed checks into a single 'project passport'.
+Supports a wide range of AI models and agents, including Claude, OpenAI, Gemini, Cursor, and Codex.
+Offers a free local-first CLI with no account required for core functionality.
+Integrates with Docker for reproducible project setups and isolated check execution.
+Addresses 'transfer debt' in AI-driven development by creating an evidence chain.

Cons

−The 'Mantyl Verified' service is a paid feature, potentially adding cost for full verification.
−Requires CLI usage, which may have a learning curve for users unfamiliar with command-line tools.
−Specific third-party user reviews are not readily available in the provided data, making broader reception assessment challenging.
−While supporting multiple agents, the depth of integration and feature parity across all supported agents may vary.
−The concept of a 'project passport' and 'transfer debt' is relatively new, requiring user education.

Policies

Pricing Page

View Pricing→

Similar Tools

Mantyl vs Competitors

Mantyl positions itself as a unique 'handover layer for AI-built software,' focusing on independent verification and an evidence chain. It differentiates from traditional documentation tools by automating the capture of AI agent history and providing verifiable proof of project integrity.

MkDocs↗

Generates static documentation sites from Markdown files, making it easy to combine code documentation with custom project narratives and reports.

MkDocs provides a flexible CLI framework for generating comprehensive project documentation from Markdown, allowing for manual inclusion of agent history and check results. It does not, however, automatically track "coding-agent history" or offer Mantyl's "verified proof of independence."

Sphinx↗

A powerful and extensible documentation generator, particularly strong for Python projects, that uses reStructuredText (or Markdown with extensions) to create rich documentation.

Sphinx offers more advanced features and extensibility for detailed code documentation compared to Mantyl. While it can be used to compile repository information and custom checks, it lacks Mantyl's specialized automation for "coding-agent history" and the concept of a "verified project passport."

Doxygen↗

A widely adopted documentation system that extracts API documentation directly from source code comments across multiple programming languages.

Doxygen excels at generating detailed API documentation directly from source code, which is a component of a project handover. It focuses less on overall project narrative or "coding-agent history" and does not provide the "verified proof of independence" that Mantyl aims to deliver.

Repo-Stats↗

A CLI tool that analyzes a codebase to provide a detailed summary including file statistics, language distribution, Git history, contributor breakdown, and detected dependencies.

Repo-Stats provides a quick, dependency-free snapshot of a codebase, including Git history, which directly addresses parts of Mantyl's "repo" and "coding-agent history" compilation. However, it is a reporting tool rather than a full documentation generator, and it does not offer the "verified proof of independence" or the structured "project passport" format of Mantyl.

See every Mantyl alternative, compared→

Related AI Tools

Other tools in this category, matched by shared tags

PowerHub Logic Pro MCP PromptPilot Tab STACK IT FAST Check: By GOLProductions Animai.it | AI & Tarot

Visit Mantyl↗

Connect

⌘

GitHubgithub.com/jopli11/mantyl-cli