# Agent-ready build and test tooling Home > Browse > build and test tooling 315 verified build and test tooling sites, 152 of them transactable — every one probed live, with the date it was checked. Figures generated 2026-09-27T07:19:26.699Z Checks passed across the 344 probed hosts: Markdown negotiation 274 · Markdown twin at a predictable URL 235 · llms.txt 317 · API catalog 57 · MCP server card answers 280. - [Recursive Language Model (RLM)](https://knowngood.sh/site/hotcopy.ai) HotCopy.ai offers a managed recursive AI coding CLI with parallel agent swarms, no context limits, and persistent memory for coding tasks. - [rstream](https://knowngood.sh/site/rstream.io) rstream provides a connectivity stack for private environments with outbound tunnels, identity, access policy, and connection logs managed at the edge. - [Tool Index](https://knowngood.sh/site/toolindex.net) Tool Index is a quality-gated directory offering searchable catalogs, comparisons, and editorial guides for AI, SaaS, and developer tools. - [Nylas CLI](https://knowngood.sh/site/cli.nylas.com) Nylas CLI is a free, open-source command-line tool for managing email, calendars, contacts, and AI agent inboxes across multiple providers. - [Hacktron Docs](https://knowngood.sh/site/docs.hacktron.ai) Hacktron provides AI-powered security code reviews with per-PR and whitebox scan modes, plus a REST API for programmatic access. - [Tembo Docs](https://knowngood.sh/site/docs.tembo.io) Documentation for Tembo, a tool to run coding agents across repos, tickets, and tools with full visibility. - [All Tools Hub](https://knowngood.sh/site/all-tools.app) A collection of free browser-based developer utilities with REST API endpoints and agent protocol support. - [Flare](https://knowngood.sh/site/api.docs.flare.io) Flare API documentation provides guides, SDKs, CLI tools, and references for accessing search, monitoring, and event export features. - [Zapster API](https://knowngood.sh/site/developer.zapsterapi.com) Zapster API documentation provides guides on sending messages, configuring webhooks, CLI usage, and API concepts including tokens and rate limits. - [0 Finance Docs](https://knowngood.sh/site/docs.0.finance) Documentation for 0 Finance CLI, a programmable bank account for managing finances via command line. - [Agentkube](https://knowngood.sh/site/docs.agentkube.com) Agentkube is an AI-powered Kubernetes IDE that automates cluster management and simplifies operations for developers and DevOps teams. - [Agentset](https://knowngood.sh/site/docs.agentset.ai) Documentation site for Agentset, a RAG-as-a-service platform for developers building AI applications. - [ascii](https://knowngood.sh/site/docs.ariana.dev) Documentation for installing Box CLI, onboarding, and starting a cloud sandbox with a free trial. - [ascii](https://knowngood.sh/site/docs.ascii.dev) Documentation for installing Box CLI, onboarding, creating cloud sandboxes, and using the ascii.dev API. - [Blocks Documentation](https://knowngood.sh/site/docs.blocks.team) Documentation for Blocks, a software factory integrating coding agents into developer tools like GitHub, GitLab, Slack, and Linear. - [Bugster](https://knowngood.sh/site/docs.bugster.dev) Documentation for Bugster CLI, an AI-powered tool for generating and maintaining automated tests for Next.js and React applications. - [bunny.net Documentation](https://knowngood.sh/site/docs.bunny.net) Technical documentation providing quickstarts, API references, CLI guides, integrations, and platform-specific developer resources for bunny.net services. - [CodeCrafters](https://knowngood.sh/site/docs.codecrafters.io) CodeCrafters provides documentation on challenges, CLI usage, billing, forum access, and profile management. - [CodeRabbit](https://knowngood.sh/site/docs.coderabbit.ai) Documentation for CodeRabbit providing AI code reviews, triage, security scans, and integrations with IDEs, CLI, Slack, and Git platforms. - [Cogniscape](https://knowngood.sh/site/docs.cogniscape.app) Documentation for Cogniscape, a knowledge graph capturing development workflow data from multiple sources via webhooks and CLI. - [CoreStory Docs](https://knowngood.sh/site/docs.corestory.ai) CoreStory Documentation provides guides and playbooks for using AI to reverse-engineer specifications from source code and make codebases queryable. - [T3 Foundation](https://knowngood.sh/site/docs.deneyapkart.org) Documentation site for T3 Deneyap Kart development boards, IDE, block coding, projects, and modules with community resources. - [Devin Docs](https://knowngood.sh/site/docs.devin.ai) Documentation for Devin, an AI software engineer that writes, runs, and tests code to assist engineering teams. - [Devin Docs](https://knowngood.sh/site/docs.devinenterprise.com) Devin Docs provides documentation for Devin, an AI software engineer that automates coding tasks and integrates with developer workflows. - [Diversion Documentation](https://knowngood.sh/site/docs.diversion.dev) Documentation for Diversion, a version control system designed for large-scale projects with massive binary files, supporting installation, CLI, and collaboration workflows. 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