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X402 Helper MCP Server

by x402helper Your server? Claim it
answering

X402 Helper MCP is answering right now. Last checked 3 min ago. It exposes 4 tools.

API discovery and x402 paid execution via MCP. Search by natural-language, call with USDC payment

Uptime history 5 days of history
5 days agonow
100.0%
Uptime 24h
91 of 91 checks
4
Tools
read from the server
377 ms
Response time
average over 24h
open, no key
Access
streamable-http

What changed 12

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 29 October 2026. No other catalogue keeps this.

2 Nov 2 tool descriptions were rewritten call_endpoint, search_endpoints
2 Nov a tool changed the parameters it asks for call_endpoint
30 Oct 2 tool descriptions were rewritten day_summary, get_my_history
30 Oct a tool appeared get_my_history
29 Oct 2 tool descriptions were rewritten3 times that day day_summary, search_endpoints
29 Oct 2 tools changed the parameters they ask for day_summary, search_endpoints
29 Oct a tool appeared day_summary
and 1 more, back to 29 October 2026

Nothing serious here today

Today is the operative word: we check X402 Helper MCP every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 3 min ago.

run in your terminal
claude mcp add mcp --transport http https://x402helper.xyz/mcp
Settings → Connectors → Add custom connector, then paste this address
https://x402helper.xyz/mcp
~/.codex/config.toml
[mcp_servers.mcp]
url = "https://x402helper.xyz/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "mcp": {
      "url": "https://x402helper.xyz/mcp"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "mcp": {
      "type": "http",
      "url": "https://x402helper.xyz/mcp"
    }
  }
}

Available tools 4

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

call
call_endpoint
Executes an endpoint found via search_endpoints. Pass `routeId` and `arguments` (keys = `parameters[].name` of that route; omit if the route has none). If payment is required, returns isError=true with `x402Version`+`accepts` in structuredContent — sign those accepts and retry with `_meta["x402/payment"]` (base64 payload). Other isError cases: `invalid_arguments` (structuredContent.details[]/requiredArgs[] tell what to fix and retry), `route_unresolved` (pick another routeId from plan[]), `failed` (refunded/refundTx; try another route). On success, returns the actual result of the endpoint. Read-only. No auth. Limits: paid 300/5min, burst 200/10s, total 1000/15min per IP.
day
day_summary
Free read-only morning brief in one call: weather, S&P 500 / Dow / NASDAQ, BTC/ETH/SOL with 24h change, top-5 news. Use when the user asks for a daily brief, morning digest, market+weather snapshot, or "what's happening today. Do NOT use for single-fact lookups or for tickers/coins/countries outside the fixed set — use search_endpoints → call_endpoint instead; Rate limit: 20 calls / 5 min per agent (key = x-agent-id, else ip:user-agent); exceeding → 429 + Retry-After as errors[].retryAfter.
endpoints
search_endpoints
FREE search for paid API endpoints (x402) by task. Pass either a natural-language query (the planner will split it) or pre-split queries[]. Returns a structured plan with up to `maxRoutesPerQuery` candidates per sub-query. No auth. Limits: burst 200/10s, total 1000/15min per IP; free probes 10/h per IP, 20/h per agent. IMPORTANT: Do not fetch `route.url` directly. To execute the preferred route, call `call_endpoint({ routeId, arguments })` — `routeId` from `plan[].routes[].routeId`, `arguments` keys = `parameters[].name` of that route.
history
get_my_history
FREE read-only access to your own successful paid calls history. Pass the buyerID you received as `meta.yourID` in any successful paid response — whether you called the endpoint directly over HTTP (e.g. https://x402helper.xyz/test-billing) or via the MCP tool `call_endpoint` (e.g. routeId `34f3gf:r1`). Returns aggregate counters plus per-route events (timestamp, endpoint, network, amount, facilitator, params). No payment required. Rate limit: 15 calls / 10 min per IP; exceeding → 429. User can also view it in a browser at https://x402helper.xyz/getmyhistory.html page.

Endpoints

URLTransportStateLatencyChecked
https://x402helper.xyz/mcp streamable-http answering 212 ms 3 min ago

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X402 Helper MCP — questions

Answers built from our own checks of this server.

What can X402 Helper MCP do?
It exposes 4 tools, read directly from the server on our last check. Among them: call_endpoint, day_summary, get_my_history, search_endpoints. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
Is X402 Helper MCP working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 377 ms. The bar chart above shows every period we have measured.
How do I connect X402 Helper MCP?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does X402 Helper MCP need an API key?
No. X402 Helper MCP completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 4 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is X402 Helper MCP?
It answers our handshake in 377 ms on average, which is faster than 35% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.