Topup MCP server

Topup is a remote MCP server that gives an AI agent 8 tools, among them buy, fx, ledger. It answers at https://iomarkets.app/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 10 of 10 times since 4 September 2026; the last check, on 17 October 2026, succeeded.

Status

Answering

Tools

Official

yes, served from iomarkets.app

Reliability

10 of 10 checks

Response time

203 ms

Transport

streamable HTTP

Last checked

17 October 2026

Travel eSIMs and mobile top-ups paid in USDC via x402. A technology demonstration, limited pilot.

Description as the publisher wrote it.

The 8 tools Topup offers

Tool	What it does
`buy`	Get the x402 payment challenge for a quote. This hosted server holds no wallet, so it does NOT spend your money: it returns the exact amount, asset, payTo address and facilitator for you to pay from your own Algorand wallet, then you POST t Inputs: quoteId
`fx`	Indicative USDC → local-currency rate at our sale price, with an estimate for an amount. The quote is the binding price. Inputs: to, amount, type
`ledger`	Public delivery ledger: totals, delivered-or-refunded %, volume, countries, recent orders.
`list_offers`	Browse purchasable offers: mobile top-ups, travel eSIMs, prepaid bills, or international payment corridors (bank / mobile money / UPI) for a country. Free. Prices shown are indicative; the quote fixes them. Inputs: type, country, brand, limit, offset
`lookup_phone`	Identify the country and mobile operator of a phone number and list the top-up offers available for it. Free. The operator is DETECTED from the number range and is a guess: MVNOs (Tesco Mobile, Giff Gaff, Lebara, Voxi, Sky…) resolve to the Inputs: phone
`order_status`	Check an order. Poll every ~3 s until `terminal` is true: delivered (confirmation + signed receipt), refunded (refund txid + signed receipt) or refund_failed. Inputs: orderId
`quote`	Lock a price (10 minutes) for one purchase. Returns quoteId, exact USDC price and what will be delivered. Free. ALWAYS show the human the price and the recipient before buying. Inputs: type, offerId, phone, amount, iccid, fields
`verify_receipt`	Verify an ed25519-signed receipt: the signature, and — unless you pass onChain:false — both txids against an Algorand indexer. Give it an orderId to check one of this service's own orders, or a receipt object to check ANY receipt in this fo Inputs: orderId, receipt, onChain

Add Topup to your AI client

Every block below points at https://iomarkets.app/mcp. Pick your client and copy.

Claude Code: one command in your terminal

claude mcp add --transport http topup https://iomarkets.app/mcp

Claude Desktop: claude_desktop_config.json

{
  "mcpServers": {
    "topup": {
      "command": "npx",
      "args": ["-y", "mcp-remote", "https://iomarkets.app/mcp"]
    }
  }
}

Cursor: ~/.cursor/mcp.json, or .cursor/mcp.json in a project

{
  "mcpServers": {
    "topup": {
      "url": "https://iomarkets.app/mcp"
    }
  }
}

VS Code and GitHub Copilot: .vscode/mcp.json

{
  "servers": {
    "topup": {
      "type": "http",
      "url": "https://iomarkets.app/mcp"
    }
  }
}

Zed: Zed settings.json

{
  "context_servers": {
    "topup": {
      "url": "https://iomarkets.app/mcp"
    }
  }
}

Windsurf: ~/.codeium/mcp_config.json

{
  "mcpServers": {
    "topup": {
      "serverUrl": "https://iomarkets.app/mcp"
    }
  }
}

JetBrains AI Assistant: Settings, Tools, AI Assistant, MCP, New MCP Server, as JSON

{
  "mcpServers": {
    "topup": {
      "url": "https://iomarkets.app/mcp"
    }
  }
}

Continue: .continue/mcpServers/neuronto.yaml

name: Topup
version: 0.0.1
schema: v1
mcpServers:
  - name: Topup
    type: streamable-http
    url: https://iomarkets.app/mcp

Gemini CLI: ~/.gemini/settings.json

{
  "mcpServers": {
    "topup": {
      "httpUrl": "https://iomarkets.app/mcp"
    }
  }
}

Codex CLI: MCP server config

{
  "mcpServers": {
    "topup": {
      "type": "http",
      "url": "https://iomarkets.app/mcp"
    }
  }
}

Warp: MCP servers, + Add, paste JSON

{
  "mcpServers": {
    "topup": {
      "url": "https://iomarkets.app/mcp"
    }
  }
}

Goose: a one-click extension link

goose://extension?url=https%3A%2F%2Fiomarkets.app%2Fmcp&type=streamable_http&id=topup&name=Topup

Is Topup up right now?

It answered our last check on 17 October 2026 in 203 ms. Over 10 checks since 4 September 2026 it answered 10. Status here comes from Neuronto's own probes, not from the publisher.

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Questions about Topup

Is there an official Topup MCP server?

Yes. It is published by iomarkets.app and served from iomarkets.app, the vendor's own domain: https://iomarkets.app/mcp.

How many tools does Topup have?

8, as returned by the server's own tools/list on 9 September 2026: buy, fx, ledger, list_offers, lookup_phone, order_status, quote, verify_receipt.

Is Topup down?

It answered our last check on 17 October 2026 in 203 ms. Over 10 checks since 4 September 2026 it answered 10.

How do I add Topup to Cursor?

Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://iomarkets.app/mcp. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.

Does Topup need an API key?

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.

Where this comes from

Publisher: app.iomarkets. Endpoint host: iomarkets.app. ARD identifier: urn:air:app.iomarkets:mcp:topup. First indexed 31 August 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.

Is this your server? Get a message the day it stops answering or its tools change: monitoring, 14 days free. Or claim the domain to manage how it is listed.