MCP server

Safe4 Official

ai.safe4/safe4

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

Tests an AI agent's purchase against the task it was given. Paid per call in USDC via x402.

Website Source

At a glance

Type

MCP server

Publisher

safe4.ai (verified by the MCP Registry)

Status

Working at last check

Tools

2

Token cost

About 792 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http safe4 https://api.safe4.ai/mcp/

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.safe4]
url = "https://api.safe4.ai/mcp/"

Gemini CLI

{"mcpServers":{"safe4":{"httpUrl":"https://api.safe4.ai/mcp/"}}}

Cursor

{"mcpServers":{"safe4":{"url":"https://api.safe4.ai/mcp/"}}}

VS Code

{"servers":{"safe4":{"type":"http","url":"https://api.safe4.ai/mcp/"}}}

Antigravity

agy mcp add safe4 https://api.safe4.ai/mcp/

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"safe4","server_url":"https://api.safe4.ai/mcp/","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"safe4","server_url":"https://api.safe4.ai/mcp/"}

Tools

• safe4_authorize ~700 tokens
  Decide whether a proposed agent payment should proceed. Settled per call in USDC over x402. Called without ``payment`` it returns the price list rather than a decision; call it again with the signed payload to receive one. The task and the two allow-lists are the principal's constraints, not the a
• safe4_price ~92 tokens
  Price and accepted payment networks for one Safe4 decision. Free to call. Returns the same x402 terms the HTTP endpoint advertises, so an agent can see the cost before committing to a paid call.

Browse

• Payments

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