AgentIndex x402 is a remote MCP server that gives an AI agent 18 tools, among them agent_health, can_pay, crypto. It answers at https://x402.agentindex.world/mcp/ over streamable HTTP, and it listed its tools to an anonymous client, so no sign-in was needed for that. Our probes reached it 6 of 6 times since 12 September 2026; the last check, on 24 October 2026, succeeded.
Pay-per-call web search, translation and research jobs for AI agents. USDC on Base, no account.
Description as the publisher wrote it.
| Tool | What it does |
|---|---|
agent_health | Fresh operational audit of any public agent or paid API: reachability, latency, HTTP status, x402 challenge, price/network/payTo, OpenAPI, agent card and MCP manifest. Returns a 0-100 score, verdict and issues. Try GET /agent-health/sample. Inputs: url, method |
can_pay | Check whether a Base wallet holds enough USDC to pay an x402 amount (default $0.001). Returns balance, can_pay, shortfall. The checklist agents run before spending. Try GET /can-pay/sample. Inputs: address, amount |
crypto | Live spot prices for crypto coins (BTC, ETH, SOL, ...) in USD or another fiat, with 24h change. Accepts tickers or CoinGecko ids. Try GET /crypto/sample. Inputs: coins, vs_currency |
extract_structured | Extract structured data from a URL or raw text into strict JSON matching a schema you provide. Fields the content doesn't support come back null - never an invented or approximate value, and an unmatchable schema returns an explicit error. Inputs: schema, url, text |
fact_check | Check a claim against live web sources - a verdict, a confidence level, and the sources that support or contradict it, each with its URL and stance. Returns 'inconclusive' rather than a guess when the sources don't clearly settle it. Try GE Inputs: claim |
gas_price | Read the live gas price, EIP-1559 base fee and estimated native-transfer cost on Base, Ethereum, Polygon, Arbitrum or Optimism. No RPC key or account. Try GET /gas-price/sample. Inputs: network |
jobs | Multi-query web research, read and synthesized into one sourced JSON brief in a single call - what would otherwise cost an agent twenty calls and its whole context window. Free status polling and result retrieval. Try GET /jobs/sample. Inputs: subject |
news | Top Hacker News headlines right now - title, URL, score, comments. Fresh links for agents that need current tech/startup signal. Try GET /news/sample. Inputs: limit |
probe | Probe any public URL and report if it is an x402 paywall - price, network, payTo, scheme. Shop paywalls before you spend. Try GET /probe/sample. Inputs: url, method |
read_pdf | Extract a public PDF (by HTTPS URL or base64) into clean markdown text, plus title/author/page count/date metadata and a real token count. Deterministic text extraction, no model involved. Try GET /pdf/sample. Part of the AgentIndex content Inputs: url, pdf_base64 |
read_web_page | Fetch a URL and return its main article as clean markdown - navigation, ads and boilerplate stripped, links resolved, plus a real token count. The same extraction /search uses on result pages, exposed standalone for a URL you already have. Inputs: url |
search | Real-time web search and content retrieval - up to 10 results with title, URL, snippet and publish date, plus clean full-page Markdown for the top 3 results by default and an optional short summary. Also accepts up to 5 queries in one call, Inputs: query, max_results, extract, include_content, content_results, content_chars |
summarize | Summarize a URL, raw text or HTML at the length you request - short, medium or long - with the source noted. Neutral and factual, no invented facts. Try GET /summarize/sample. Part of the AgentIndex content kit (pdf, web-read, extract, summ Inputs: url, text, html, length |
translate | Translate up to 200 text segments in a single call - the same result that would otherwise take 200 separate calls to translate a whole file. Markdown, HTML and {x} placeholders preserved per segment, order and count kept intact, source lang Inputs: text, target_lang, source_lang, preserve_format |
wallet_balance | Read native coin and USDC balances for any EVM wallet on Base, Ethereum, Polygon, Arbitrum or Optimism, with atomic amounts and current block. No RPC key or account. Try GET /wallet-balance/sample. Inputs: address, network |
wallet_intelligence | One call replaces wallet-balance and gas reads across Base, Ethereum, Polygon, Arbitrum and Optimism. Returns native and USDC balances, current blocks, fees and Base x402 payment readiness. One signature instead of ten paid requests. Try GE Inputs: address, networks, amount_usdc |
weather | Current weather and a 3-day forecast for any city or lat/lon - temperature, humidity, wind, conditions. No account, no API key. Try GET /weather/sample. Inputs: city, lat, lon |
x402_echo | Cheapest possible Base-mainnet x402 conformance call: settle exactly one atomic unit of USDC ($0.000001) and receive payer identity, request echo and receipt. Built for agents testing wallets, Payment-Signature, facilitators and settlement. Inputs: message |
Every block below points at https://x402.agentindex.world/mcp/. Pick your client and copy.
claude mcp add --transport http agentindex-x402 https://x402.agentindex.world/mcp/
{
"mcpServers": {
"agentindex-x402": {
"command": "npx",
"args": ["-y", "mcp-remote", "https://x402.agentindex.world/mcp/"]
}
}
}{
"mcpServers": {
"agentindex-x402": {
"url": "https://x402.agentindex.world/mcp/"
}
}
}{
"servers": {
"agentindex-x402": {
"type": "http",
"url": "https://x402.agentindex.world/mcp/"
}
}
}{
"context_servers": {
"agentindex-x402": {
"url": "https://x402.agentindex.world/mcp/"
}
}
}{
"mcpServers": {
"agentindex-x402": {
"serverUrl": "https://x402.agentindex.world/mcp/"
}
}
}{
"mcpServers": {
"agentindex-x402": {
"url": "https://x402.agentindex.world/mcp/"
}
}
}name: AgentIndex x402
version: 0.0.1
schema: v1
mcpServers:
- name: AgentIndex x402
type: streamable-http
url: https://x402.agentindex.world/mcp/{
"mcpServers": {
"agentindex-x402": {
"httpUrl": "https://x402.agentindex.world/mcp/"
}
}
}{
"mcpServers": {
"agentindex-x402": {
"type": "http",
"url": "https://x402.agentindex.world/mcp/"
}
}
}{
"mcpServers": {
"agentindex-x402": {
"url": "https://x402.agentindex.world/mcp/"
}
}
}goose://extension?url=https%3A%2F%2Fx402.agentindex.world%2Fmcp%2F&type=streamable_http&id=agentindex-x402&name=AgentIndex%20x402
It answered our last check on 24 October 2026 in 370 ms. Over 6 checks since 12 September 2026 it answered 6. Status here comes from Neuronto's own probes, not from the publisher.
Yes. It is published by agentindex.world and served from x402.agentindex.world, the vendor's own domain: https://x402.agentindex.world/mcp/.
18, as returned by the server's own tools/list on 23 September 2026: agent_health, can_pay, crypto, extract_structured, fact_check, gas_price, jobs, news, and 10 more.
It answered our last check on 24 October 2026 in 370 ms. Over 6 checks since 12 September 2026 it answered 6.
Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://x402.agentindex.world/mcp/. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.
It listed its tools to an anonymous client, so reading the tool list needs no key. Individual tools can still ask for credentials in their own inputs.
Publisher: world.agentindex. Endpoint host: x402.agentindex.world. ARD identifier: urn:air:world.agentindex:mcp:x402.
First indexed 10 September 2026. The tools are exactly what the server returned; nothing on this page
is inferred from its name. Ranking in Neuronto search is never for sale.