MCP server

x402lint

io.github.something-agent/x402lint

Checked 28 Oct 2026, 09:03 UTC · Connected to it and listed its tools

Free x402 endpoint linter: unpaid 402 challenge, payTo/asset/amount, CORS, directory readiness.

Working at last checkAbout 508 tokens per request once connected3 tools

https://x402lint.something-agent.workers.dev/mcp

At a glance

Type: MCP server
Publisher: Not verified
Status: Working at last check
Tools: 3
Token cost: About 508 tokens per request
Sets up in: Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok
Last checked: 28 Oct 2026, 09:03 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 x402lint https://x402lint.something-agent.workers.dev/mcp

Claude Desktop

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

Codex (config.toml)

[mcp_servers.x402lint]
url = "https://x402lint.something-agent.workers.dev/mcp"

Gemini CLI

{"mcpServers":{"x402lint":{"httpUrl":"https://x402lint.something-agent.workers.dev/mcp"}}}

Cursor

{"mcpServers":{"x402lint":{"url":"https://x402lint.something-agent.workers.dev/mcp"}}}

VS Code

{"servers":{"x402lint":{"type":"http","url":"https://x402lint.something-agent.workers.dev/mcp"}}}

Antigravity

agy mcp add x402lint https://x402lint.something-agent.workers.dev/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":"x402lint","server_url":"https://x402lint.something-agent.workers.dev/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"x402lint","server_url":"https://x402lint.something-agent.workers.dev/mcp"}

check_directory_readiness ~191 tokens
Lint an x402 endpoint's unpaid 402 and report, per directory, whether it meets what x402dash (unpaid GET must return 402), x402scan (OpenAPI x-payment-info or /.well-known/x402, input schema), the402 (validator 'payable') and the CDP/PayAI Bazaar (bazaar extension, description <= 500 chars, non-tunn
lint_payment_required ~144 tokens
Lint a PaymentRequired object you already have (decoded JSON, a JSON string, or the raw base64 PAYMENT-REQUIRED header). Same field/value checks as lint_x402_endpoint, no network access. Free.
lint_x402_endpoint ~173 tokens
Unpaid lint of an x402 endpoint: fetches the 402 (GET and POST), then checks the challenge (version, accepts[] fields, CAIP-2 network, payTo/asset/amount sanity, EIP-712 name/version, timeouts, resource), transport (redirects, cache headers, CORS) and discovery files. Returns findings with ids, seve

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Signed x402 attestations and bounty-packet preflight checks, paid per call in USDC on Base.
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Wicked MCP
Whole Wicked suite for agents: market data, SEC filings, wallet checks, risk, identity, memory.
FabTally Guard
Verify before you act: deps-check, x402-preflight, json-repair & url-read for agents.
US Company Intelligence for AI Agents (SEC EDGAR, x402)
SEC EDGAR company briefs for agents: cited synthesis, XBRL metrics. x402/USDC, no account.
Agent Utils (x402)
Pay-per-call US public data for agents: recalls, weather, climate, SEC filings. x402 USDC on Base.
SpendPreflight
Free x402 Lint and Seller Index top 3; paid Security Check, Quote Check and stablecoin tools.
Surface Contract: platform API behavior and x402 pre-payment checks
Surface contracts: API behavior evidence, x402 pre-payment check, MCP server preflight

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