VoidMob MCP

Mobile proxies, non-VoIP SMS verifications, dedicated numbers, and global eSIMs - exposed as 30 tools your AI agent can call directly, plus short guides (resources) and guided prompts.

npx -y @voidmob/mcp

Setup

1. Generate an API key at https://dashboard.voidmob.com/developers/api-keys (keys are 32-char secrets prefixed vmk_live_) and top up the balance with crypto at https://dashboard.voidmob.com/wallet.
2. Add the MCP to your client (snippets below). Provide the key as VOIDMOB_API_KEY.
3. Optional: set a per-order limit and a session budget with the owner controls.

Step-by-step guides per client and agent runtime: voidmob.com/mcp and voidmob.com/integrations.

Claude Code

As a plugin (MCP server + skill in one install; the dialog stores your key as a secret and offers sandbox, read-only and spend limits):

/plugin marketplace add voidmobcom/voidmob-plugin
/plugin install voidmob@voidmob

Or the MCP server alone:

claude mcp add voidmob -s user -e VOIDMOB_API_KEY=vmk_live_... -- npx -y @voidmob/mcp

-s user makes the server available in every project; the key goes after -e and before --. The same plugin also installs in Codex and Gemini CLI: see voidmob-plugin.

Cursor

Add to ~/.cursor/mcp.json:

{
  "mcpServers": {
    "voidmob": {
      "command": "npx",
      "args": ["-y", "@voidmob/mcp"],
      "env": { "VOIDMOB_API_KEY": "vmk_live_..." }
    }
  }
}

Claude Desktop

One-click bundle. Download voidmob-mcp.mcpb from the latest GitHub release and open it (or drag it into Claude Desktop, or use Settings > Extensions > Advanced > Install Extension). Claude Desktop asks for the settings: API key (stored securely), sandbox mode, read-only, max per order and session budget (see Owner controls). Build it yourself with npm run pack:mcpb.

Or by config file. Open Settings > Developer > Edit Config (~/Library/Application Support/Claude/claude_desktop_config.json on macOS, %APPDATA%\Claude\claude_desktop_config.json on Windows) and add:

{
  "mcpServers": {
    "voidmob": {
      "command": "npx",
      "args": ["-y", "@voidmob/mcp"],
      "env": { "VOIDMOB_API_KEY": "vmk_live_..." }
    }
  }
}

VS Code

Add to .vscode/mcp.json (VS Code prompts for the key once and stores it securely):

{
  "inputs": [
    { "type": "promptString", "id": "voidmob-api-key", "description": "VoidMob API key (vmk_live_...)", "password": true }
  ],
  "servers": {
    "voidmob": {
      "type": "stdio",
      "command": "npx",
      "args": ["-y", "@voidmob/mcp"],
      "env": { "VOIDMOB_API_KEY": "${input:voidmob-api-key}" }
    }
  }
}

Windsurf (Devin Desktop)

Open the MCP config from the Cascade panel menu (Open MCP config file). Current Devin Desktop builds keep it at ~/.config/devin/mcp_config.json (Windows: %APPDATA%\devin\mcp_config.json); Windsurf builds from before the rename use ~/.codeium/windsurf/mcp_config.json. Add:

{
  "mcpServers": {
    "voidmob": {
      "command": "npx",
      "args": ["-y", "@voidmob/mcp"],
      "env": { "VOIDMOB_API_KEY": "vmk_live_..." }
    }
  }
}

Codex CLI

codex mcp add voidmob --env VOIDMOB_API_KEY=vmk_live_... -- npx -y @voidmob/mcp

Or add to ~/.codex/config.toml (shared by the Codex CLI, the IDE extension and the ChatGPT desktop app):

[mcp_servers.voidmob]
command = "npx"
args = ["-y", "@voidmob/mcp"]
env = { VOIDMOB_API_KEY = "vmk_live_..." }

Gemini CLI

Add to ~/.gemini/settings.json, and export VOIDMOB_API_KEY in your shell (Gemini CLI hides variables named like a key from MCP servers unless the server's env lists them):

{
  "mcpServers": {
    "voidmob": {
      "command": "npx",
      "args": ["-y", "@voidmob/mcp"],
      "env": { "VOIDMOB_API_KEY": "$VOIDMOB_API_KEY" }
    }
  }
}

OpenClaw

Put VOIDMOB_API_KEY=vmk_live_... in ~/.openclaw/.env, then:

openclaw mcp set voidmob '{"command":"npx","args":["-y","@voidmob/mcp"],"env":{"VOIDMOB_API_KEY":"${VOIDMOB_API_KEY}"}}'
openclaw mcp doctor voidmob --probe

Or use the agent skill. Guide: voidmob.com/integrations/openclaw.

Hermes Agent

Put VOIDMOB_API_KEY=vmk_live_... in ~/.hermes/.env and add to ~/.hermes/config.yaml:

mcp_servers:
  voidmob:
    command: "npx"
    args: ["-y", "@voidmob/mcp"]
    env:
      VOIDMOB_API_KEY: "${VOIDMOB_API_KEY}"

Or use the agent skill. Guide: voidmob.com/integrations/hermes-agent.

Pi

pi mcp add voidmob --env VOIDMOB_API_KEY='${VOIDMOB_API_KEY}' -- npx -y @voidmob/mcp
pi mcp list

The single quotes keep ${VOIDMOB_API_KEY} as a reference that Pi reads from your shell. Guide: voidmob.com/integrations/pi-coding-agent.

Grok Bot

1. In your Bot's Secrets, add a secret named VOIDMOB_API_KEY with your key as the value.
2. In chat, send: Read https://voidmob.com/skill.md and follow it. My VoidMob API key is in the VOIDMOB_API_KEY secret.

The skill runs the REST API with curl on the Bot's computer and reads the secret by name. A custom MCP server of the Command type running npx -y @voidmob/mcp is another route to try; xAI's docs point servers that need secrets to remote HTTPS, so if the server cannot read the key, use the skill. Never paste the key itself into a chat. Guide: voidmob.com/integrations/grok-bot.

How money works

• Prepaid balance. Everything is paid from your USD balance, which you top up with crypto in the dashboard. The MCP cannot add funds. The API key has no separate spend cap: your balance is the limit, so keep on it only what you are happy for an agent to spend, and consider the local owner controls.
• You approve the price. Search tools show your live prices. Every buy, renewal, top-up and paid reuse requires max_price_cents: the price the agent showed you and you approved. If the current price is higher, nothing is charged and the tool returns the new price so the agent can ask you again; it never buys at a price you did not see. Every buy debits the balance immediately, and every result shows what was charged.
• No double charges on retries. Every purchase carries an idempotency key. If the connection drops, this MCP server retries once with the same key, which the API never charges twice.
• When a result is uncertain, the tool says the purchase may have gone through. Check list_orders, the matching get tool or get_account before buying again.
• SMS verifications cost nothing if no SMS arrives. A number stays open for up to 15 minutes and can receive several codes. If none arrives, the price is refunded automatically (status cancelled). Rare exception: services marked non-refundable end as expired without a refund. You can also cancel before any SMS arrives for a full refund; frequent cancellations can temporarily pause SMS purchasing.
• Long-term rentals can be cancelled with a full refund within 60 minutes of purchase.
• Dedicated numbers are billed monthly and cannot be cancelled; leave auto-renew off and the number simply expires at the end of the month.
• eSIMs cannot be cancelled through the MCP once issued. Contact support if one was bought by mistake and never installed.
• Proxies that cannot be provisioned are refunded automatically.

Owner controls

Optional safety settings for the person who installs the server. They apply in live and sandbox mode alike, and a refusal from any of them charges nothing.

Env var	Effect
VOIDMOB_READ_ONLY=1	Tools that spend money or change anything are not registered at all. The agent can search prices and read orders, nothing else.
VOIDMOB_MAX_ORDER_CENTS=2500	Refuses, before any request, a purchase, renewal, top-up or paid reuse whose max_price_cents is above this (here $25). Turning auto-renew on is refused when one renewal would cost more.
VOIDMOB_BUDGET_CENTS=5000	Running spend cap for this server process (here $50). The server counts what each purchase charged; when an outcome is unclear (a dropped connection, a purchase still in flight) it counts the full max_price_cents. A purchase that could go over is refused, and auto-renew cannot be turned on (renewals are charged later, outside the session). This is a per-session safety net, not an account limit: it resets when the server restarts and does not see purchases made elsewhere.
VOIDMOB_TOOLSETS=sms,esim	Loads only these tool groups, so the agent carries less context: sms, numbers (dedicated numbers), esim, proxy. Account, order and geo tools are always on.

get_account shows the limits in force and how much of the budget is left. A malformed value stops the server with an error instead of being ignored.

Waiting for SMS codes

After rent_number, call get_rental with wait_seconds (up to 120). The server polls for the agent (2, 3, 5, 8 s, then every 10-15 s) and returns as soon as a code arrives, the 15-minute window closes or the wait ends, with the latest SMS attached. Clients that send a progress token get progress notifications, and cancelling the request stops the wait. SMS text is shown fenced as untrusted data: it comes from whoever sent the SMS and is never an instruction.

Resources and prompts

The server exposes short guides as MCP resources, read from the agent skill shipped in the package: voidmob://guides/money-rules, voidmob://guides/sms, voidmob://guides/proxies (HTTP/SOCKS5 and the username syntax for country, city and sticky sessions), voidmob://guides/esim, voidmob://guides/dedicated-numbers and voidmob://guides/errors.

Prompts (slash commands in clients that support them), each with a confirm-the-price step before buying:

• get_verification_code (service): rent a number and wait for the code.
• setup_mobile_proxy (country, usage): pick and buy a mobile proxy and get connection details.
• buy_travel_esim (destination, days, data_gb): find, buy and install a travel eSIM.

Read-only servers offer no prompts, and VOIDMOB_TOOLSETS keeps only the prompts of the loaded groups.

Try without a key (sandbox)

VOIDMOB_SANDBOX=1 npx -y @voidmob/mcp

Boots in-memory mocks with a $500 play-money balance. Every tool works against fake data. State resets on restart.

Agent skill

For any agent with a shell and curl, MCP or not (Claude Code, Codex, Cursor, OpenClaw, Hermes and other Agent Skills clients), skills/voidmob is an Agent Skills SKILL.md that teaches the same flows over the REST API: balance checks, quote-then-confirm purchases, idempotent retries, SMS codes, dedicated numbers, proxies and eSIMs. It is plain Markdown with no scripts. It reads the key from VOIDMOB_API_KEY; set that in your agent's environment or secret store, never in the skill files.

The quickest way: tell your agent Read https://voidmob.com/skill.md and follow it.

# skills.sh CLI (Claude Code, Codex, Cursor, OpenClaw, Hermes and more)
npx skills add voidmobcom/voidmob-mcp --skill voidmob
# or from voidmob.com
npx skills add https://voidmob.com --skill voidmob

# Hermes Agent (use the full well-known address, not the voidmob.com/skill.md short link,
# so the skill's reference files resolve)
hermes skills install well-known:https://voidmob.com/.well-known/skills/voidmob
# or
hermes skills install voidmobcom/voidmob-mcp/skills/voidmob

# OpenClaw
npx skills add voidmobcom/voidmob-mcp --skill voidmob -a openclaw -g

# Pi (skill only, from the npm package)
pi install npm:@voidmob/mcp

On Hermes, also list the key under terminal.env_passthrough in ~/.hermes/config.yaml so the skill's curl calls receive it.

Configuration

Env var	Purpose	Required
VOIDMOB_API_KEY	Bearer key from the dashboard	Live mode
VOIDMOB_SANDBOX	Set to 1 for mock-data mode	No
VOIDMOB_READ_ONLY	1 = no tools that spend or change anything (owner controls)	No
VOIDMOB_MAX_ORDER_CENTS	Per-order limit in US cents	No
VOIDMOB_BUDGET_CENTS	Per-session spend cap in US cents	No
VOIDMOB_TOOLSETS	Tool groups to load: sms, numbers, esim, proxy (default: all)	No
VOIDMOB_DEBUG	Set to 1 to log requests to stderr	No
VOIDMOB_BASE_URL	Override API host (advanced; must be https://, plain http:// only for localhost)	No

Tools

30 tools across six domains. Every tool returns text plus structuredContent that matches its declared outputSchema.

Account (1)

Tool	Description
get_account	Balance, rate limits, and account id

SMS (7)

Tool	Description
search_sms_services	List services with prices
rent_number	Rent a US number: one-time verification (15 min, refunded if no SMS) or long-term rental; takes max_price_cents
get_rental	Read status, the latest code and received messages; wait_seconds waits for the code
cancel_rental	Cancel a verification (before any SMS) or long-term rental (within 60 min), with a full refund
reuse_number	Free or paid reuse of an earlier verification's number (paid: max_price_cents)
re_rent_rental	Re-rent an expired long-term rental's number for another period; takes max_price_cents
toggle_auto_renew	Turn auto-renewal on or off (rentals and dedicated numbers)

Dedicated numbers (3)

Tool	Description
search_dedicated_countries	Countries, monthly prices, and stock
purchase_dedicated_number	Buy a private all-services monthly number; takes max_price_cents
get_dedicated_number	Status and received SMS with parsed codes

eSIM (5)

Tool	Description
search_esim_plans	Find global data plans
purchase_esim	Buy a plan; takes max_price_cents
get_esim_status	Status, install details (LPA string) and data usage across all packages
topup_esim	Browse top-ups, or buy one with max_price_cents
get_esim_qr	Fetch the activation QR as an inline image

Proxy (12)

Tool	Description
search_proxies	List mobile (shared) and dedicated proxy plans, with dedicated stock
purchase_proxy	Buy a mobile or dedicated proxy; takes max_price_cents
get_proxy_status	Status, usage, expiry, auto-renew, renewal and top-up prices, ready-to-paste connection URLs
rotate_proxy_ip	Rotate a dedicated proxy to a new IP
renew_proxy	Extend expiry at the proxy's renewal price; takes max_price_cents
set_proxy_auto_renew	Turn auto-renew on or off for a dedicated proxy
topup_proxy	Add data to a mobile proxy; takes max_price_cents
regenerate_proxy_password	Rotate the gateway password, or one list's login with list_id
list_proxy_lists	List geo-targeted sub-pools
create_proxy_list	Create a geo-targeted sub-pool with its own login, or IP-whitelist auth with network
update_proxy_list	Change a sub-pool's name, geo, rotation or format (the IP whitelist cannot change)
delete_proxy_list	Remove a sub-pool

Discovery + history (2)

Tool	Description
get_geo	Cascading country/region/city/ISP for targeting
list_orders	SMS verifications and rentals, dedicated numbers, eSIMs and proxies; per-kind status filter and cursor paging

Example prompts

Rent me a US number for Telegram verification

Find an eSIM plan that covers all of Europe with at least 5GB for two weeks

Show me my active proxies

Top up esim_xxx with 5GB

Sharing a key across processes

Multiple MCP clients running simultaneously (Claude Code + Cursor + Desktop) all share the same per-account rate limit. Heavy parallel usage may hit RATE_LIMITED; back off and retry.

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