X402 Helper MCP

xyz.x402helperPublished by x402helper.xyzOfficial publisherv1.0.0Updated Oct 30, 2026

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

VerifiedStreamable HTTPWeb executableWeb Search & ScrapingFinance

Overview

AI-generated overview

Remote MCP server for finding x402 paid API endpoints by natural-language query, calling them with USDC payment, and fetching a free daily brief.

What you can do
  • Search paid x402 API endpoints by natural-language task or pre-split queries, returning a structured plan of candidates with route IDs
  • Execute a found endpoint by route ID with arguments, retrying with a signed payment when the call reports that payment is required
  • Get a free read-only morning brief combining weather, S&P 500, Dow, NASDAQ, BTC/ETH/SOL 24h change and top-5 news
When to use it
Useful when an assistant needs to discover third-party APIs for a task and pay per call in USDC, or when a user wants a quick daily digest of weather, major indices, crypto prices and headlines.
Requirements
A remote streamable HTTP endpoint; no packages, environment variables or headers are declared. Calling paid endpoints requires a wallet able to sign x402 USDC payments, and network access.
Before you install
call_endpoint can trigger real USDC payments: the server returns payment details and expects the agent to sign and retry, so spending should be capped and confirmed. Endpoint arguments and queries go to a third-party service, and results come from external paid APIs of unknown quality.

Installation

In SourceWeft

  1. Open X402 Helper MCP in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/xyz.x402helper%2Fmcp/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "x402-helper": {
      "type": "http",
      "url": "https://x402helper.xyz/mcp"
    }
  }
}

Tools

3

search_endpoints

FREE search for paid API endpoints (x402) by task in natural language. Pass either a natural-language query (the planner will split it) or pre-split queries[]. Returns a structured plan (plan[]) with candidates; IMPORTANT: each candidate contains a routeId. To execute a found endpoint, pass routeId to call_endpoint — do not call the returned URL directly.

ParametersquerybudgetqueriesmaxRoutesPerQuery

call_endpoint

Executes an endpoint found via search_endpoints. Accepts a routeId and arguments. If payment is required, returns isError=true with payment details in structuredContent. In this case, the agent must sign the payment and retry the call with _meta["x402/payment"]. On success, returns the actual result of the endpoint.

ParametersrouteIdrequiredarguments

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 todayDo 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.

Parametersnewsregweatherreg

Version history

1
  1. v1.0.0LatestOct 30, 2026

Score

72% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts

    Publish an icon in the registry entry.

  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • LicenseNot applicable

    A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.