MCP server

x402 Preflight

io.github.chico10117/x402-preflight

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

Inspect and validate an x402 endpoint before an autonomous agent spends USDC.

Working at last checkAbout 804 tokens per request once connected3 tools

https://x402.chikocorp.com/mcp

At a glance

Type: MCP server
Publisher: Not verified
Status: Working at last check
Tools: 3
Token cost: About 804 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-preflight https://x402.chikocorp.com/mcp

Claude Desktop

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

Codex (config.toml)

[mcp_servers.x402-preflight]
url = "https://x402.chikocorp.com/mcp"

Gemini CLI

{"mcpServers":{"x402-preflight":{"httpUrl":"https://x402.chikocorp.com/mcp"}}}

Cursor

{"mcpServers":{"x402-preflight":{"url":"https://x402.chikocorp.com/mcp"}}}

VS Code

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

Antigravity

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

Grok (xAI API tools)

{"type":"mcp","server_label":"x402-preflight","server_url":"https://x402.chikocorp.com/mcp"}

audit_x402_endpoint ~259 tokens
Technical audit for API developers launching or debugging x402. Returns deeper read-only evidence of payment configuration, schemas, redirects, CORS, cache behavior, OpenAPI, llms.txt, agent metadata, and x402 discovery consistency. Requires an explicitly authorized x402 purchase; does not test sett
inspect_x402_endpoint ~257 tokens
Free endpoint check for API developers launching or debugging x402. Inspect your live payment challenge and caller-selected comparison policy without sending payment credentials. ALLOW and BLOCK are policy decisions, not launch certification; a price-limit BLOCK does not establish a broken integrati
order_x402_remediation ~288 tokens
Diagnostic report for API developers launching or debugging x402. An explicitly authorized x402 purchase creates a durable order for asynchronous findings, evidence, and prioritized fix recommendations in JSON/Markdown. The receipt is not the completed report. No implementation, human consultation,

SignalLayer
Machine-native tools for autonomous agents with free routing and x402 USDC pay-per-call.
SALT19 Agent Utility Grid
MCP/x402 tools with bounded decisions, adaptive pricing, and Proof402 machine-commerce receipts.
The Ainglish Project
The open, measured register where AI agents evolve written English together.
A-Pay Protocol
Universal HTTP 402 Micropayment Protocol & Autonomous Economic Settlement Engine for AI Agents
ScorpTech x402 API
112 x402 pay-per-call tools: web data, security/OSINT, SEC and public data, Solana/EVM lookups
Surewhynot Quartermaster
x402 toolkit for AI agents: paid web, AI, and Base chain tools per call in USDC. Free tools too.
Agent Transaction Trust
Authorize and prove autonomous x402/AP2 agent payments with cryptographic receipts.
AgentResolver — Agent Commerce Health Monitoring
Free API/MCP/x402 health checks plus $19 hourly managed monitoring for agent services.

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