Servers by a4a

Scanned where there is a package or repository to read, and every release diffed against the tool surface we already hold. Every figure on a card is counted from this marketplace's own rows.

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Verified publishers only Has a free tier No local install needed Answers through mcprush Tools listed Only what I saved 0 Already in one of my lists

Pricing model

Free1

Category

AI & Agents1

Memory & Knowledge0 Developer Tools & Repos0 API Development0 Databases0 Data Science & ML0 Analytics & Monitoring0 Cloud & DevOps0 Security & Testing0 Authentication & Identity0 Web, Search & Scraping0 Browser Automation0 Search0 Files & Storage0 Productivity & Workflow0 Communication & Collaboration0 Email0 Learning & Documentation0 Research0 Content Management0 Design & Media0 Finance & Commerce0 Payments & Billing0 E-commerce0 Sales & CRM0 Marketing, SEO & Social0 Gaming & Entertainment0 Lifestyle & Local0 Other0

Runtime

Local (stdio)1

Auth

No auth1

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Claude Code1

Claude Desktop1

ChatGPT1

Cursor1

VS Code1

Codex CLI1

Gemini CLI1

Grok Build1

Perplexity1

DeepSeek Harness1

Zed1

Devin Desktop1

Windsurf (legacy)1

OpenAI Agents SDK1

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1 MCP server

Scanned where there is a package or repository to read, graded from its tool list where there is only an address — the grade is on each server's page

By a4a

A4A (Agent-for-Agent Network)

a4a·AI & Agents

Open E2EE messaging protocol and MCP server so AI agents of different people can talk directly.

11/day 44 tools

Free

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