MCP server

Money-Engine x402 Research

com.devvizion/x402-research

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

Free agent discovery + paid x402 research (outline 0.01 / brief 0.02 USDC Base).

Working at last checkVerified publisher: devvizion.comAbout 522 tokens per request once connected6 tools

https://x402.devvizion.com/mcp

At a glance

Type: MCP server
Publisher: devvizion.com (verified by the MCP Registry)
Status: Working at last check
Tools: 6
Token cost: About 522 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

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 x402-research https://x402.devvizion.com/mcp

Claude Desktop

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

Codex (config.toml)

[mcp_servers.x402-research]
url = "https://x402.devvizion.com/mcp"

Gemini CLI

{"mcpServers":{"x402-research":{"httpUrl":"https://x402.devvizion.com/mcp"}}}

Cursor

{"mcpServers":{"x402-research":{"url":"https://x402.devvizion.com/mcp"}}}

VS Code

{"servers":{"x402-research":{"type":"http","url":"https://x402.devvizion.com/mcp"}}}

Antigravity

agy mcp add x402-research https://x402.devvizion.com/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":"x402-research","server_url":"https://x402.devvizion.com/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"x402-research","server_url":"https://x402.devvizion.com/mcp"}

x402_discovery ~50 tokens
Free x402 discovery document (resources, prices, payTo, facilitator, convertLadder).
x402_health ~64 tokens
Free liveness + pricing for the money-engine Research API (x402 USDC on Base). Ladder: free sample_outline → outline 0.01 → brief 0.02.
x402_research_brief ~128 tokens
Paid full research brief (0.02 USDC Base · upgrade). Free first: x402_sample_outline; optional outline 0.01 first. Body {topic}. Without paymentHeader returns 402 + accepts[].
x402_research_outline ~120 tokens
Paid research outline (0.01 USDC Base · first pay). Free first: x402_sample_outline. Body {topic}. Without paymentHeader returns 402 + accepts[].
x402_sample_outline ~96 tokens
FREE research teaser (3 bullets). Convert ladder: this tool → paid x402_research_outline 0.01 USDC → x402_research_brief 0.02 USDC Base. Body {topic?} default x402.
x402_sample_scrub ~64 tokens
Free sample data-scrub / leak-guard teaser (dirty→clean demo). Alt path — primary convert is x402_sample_outline → outline 0.01.

Penny Engine — Agent Operations
Remote MCP utilities for agents: structured data, commerce checks, and x402 paid API discovery.
The Stall
277 pay-per-call MCP tools: YouTube keyword research, stocks, crypto, DeFi, options, macro.
Secant Agent Research Pack
Paid MCP web research for agents: search, extraction, citations, and x402 payment discovery.
AgentLot Marketplace
AI marketplace for agents to find paid work and trade digital services via MCP and x402.
Mekler AI
Research, inference, data/web/email tools, and x402 conformance, service catalog and grade feeds.
Oblique Markets
x402-paid analytics, market intelligence, research, and LLM inference for AI agents.
BeliefState
Stock research and investor research for trading agents. 16 x402 tools; data from 0.02 USDC on Base.
Money Reactor
Pay-per-call x402 MCP: 22 agent APIs on Base USDC. Crypto, onchain reads, repo safety. From $0.001

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