Ucode SMS is answering right now. Last checked 10 min ago. It exposes 50 tools.
Virtual phone numbers for SMS/OTP verification. Browse free; pay with credits or USDC (x402).
Uptime history
47 days of history · worst day 0%
47 days agonow
100.0%
Uptime 24h
91 of 91 checks
50
Tools
read from the server
213 ms
Response time
average over 24h
open, no key
Access
streamable-http
What changed 16
Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 29 September 2026. No other catalogue keeps this.
20 Oct
3 tool descriptions were rewritten
ucode_credit_packages, ucode_credits_status, ucode_render_credits
20 Oct
a tool changed version
29 Sep
8 tools appeared
ucode_agent_buy_credits, ucode_agent_cancel, ucode_agent_check_sms and 5 more
29 Sep
2 tool descriptions were rewritten
ucode_agent_billing, ucode_credit_referral_redeem
29 Sep
a tool changed the parameters it asks for
ucode_credit_referral_redeem
29 Sep
a tool changed version
Ucode SMS does not always answer
Over the last week it answered 77.2% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.
Connect this server
Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 10 min ago.
run in your terminal
claude mcp add sms --transport http https://mcp.ucodesim.com/mcpSettings → Connectors → Add custom connector, then paste this address
https://mcp.ucodesim.com/mcp~/.codex/config.toml
[mcp_servers.sms]
url = "https://mcp.ucodesim.com/mcp".cursor/mcp.json
{
"mcpServers": {
"sms": {
"url": "https://mcp.ucodesim.com/mcp"
}
}
}.vscode/mcp.json
{
"servers": {
"sms": {
"type": "http",
"url": "https://mcp.ucodesim.com/mcp"
}
}
}Available tools 50
Read directly from the server with tools/list, grouped by what they act on.
If a tool disappears, we record the date.
ucode
ucode_agent_billing
No login. Lists prepaid credit packs priced in USDC on Base for autonomous agents/bots (packageId, credits, usd, payTo). Buy one with **ucode_agent_buy_credits**. Signed-in humans pay by card at https://ucode.uk/app/credits instead (**ucode_render_credits**).
ucode_agent_buy_credits
Autonomous agents: buy a prepaid credit pack with USDC on Base using the x402 protocol — no account or card needed. Step 1: call with {pack, acceptLawfulUse:true} (no paymentHeader) → returns PAYMENT_REQUIRED with exact x402 requirements. Step 2: sign that payment with your x402 wallet and call again with paymentHeader → credits are added and a uc_live_ API key is returned (shown once, also stored for this MCP session). Pack ids come from ucode_agent_billing (aliases: starter, plus, pro). Only spend what the user approved.
ucode_agent_cancel
Cancel an agent rental when no SMS arrived; credits return to the agent wallet. Requires the uc_live_ API key.
ucode_agent_check_sms
Poll an agent rental for the SMS/OTP. Pass id and pollToken from ucode_agent_rent (or rely on the session API key).
ucode_agent_quote
Exact USDC (Base) price to rent ONE number for a service/country without prepaid credits. Use the 'service' code from ucode_find_numbers and a countryId.
ucode_agent_rent
Rent one virtual number for a lawful SMS verification. Pays from the agent wallet when a uc_live_ API key is active (from ucode_agent_buy_credits, ucode_agent_use_api_key, or an Authorization: Bearer uc_live_… header on the MCP connection). Without a key it uses pay-per-SMS: first call returns PAYMENT_REQUIRED (x402, USDC on Base); call again with paymentHeader. Returns phone, id and pollToken → then call ucode_agent_check_sms. Signed-in human accounts should use ucode_sms_rent_with_credits instead.
ucode_agent_use_api_key
Activate a previously issued uc_live_ agent API key for this MCP session (for clients that cannot set an Authorization header).
ucode_agent_wallet
Credit balance of the agent wallet behind the active uc_live_ API key.
ucode_app_init_snapshot
Combined snapshot (packages, rentals, credit status, settings). Use platform web for ChatGPT (Stripe/crypto web packages); ios/android for native.
ucode_authenticate
Hidden escape hatch: only if the user explicitly already has a mobile Bearer token and asks to use it. Do NOT suggest this for normal sign-in — use ucode_login_start + ucode_login_poll instead.
ucode_connect
Starts browser sign-in for the visual card **Connect** button. Returns linkUrl + sessionId with uiView sign-in. Poll **ucode_login_poll** until linked.
ucode_credit_gift_breakdown
Free-credit badges / gift breakdown.
ucode_credit_packages
Same packs as **ucode_render_credits** (data). Prefer **ucode_render_credits**; credits are added on the Ucode website dashboard, never in chat.
ucode_credit_referral_redeem
Apply a friend's referral code (once per account, only if the referral program is active). Never guess, generate or loop over codes.
ucode_credit_referral_stats
Referral code and earnings summary.
ucode_credits_status
Linked wallet — **credits** are in-app points for renting numbers, not a bank balance. Always say “you have X credits”. After the user adds credits on the dashboard, call this so the ChatGPT card refreshes. Never imply USD wallet unless discussing listed pack prices.
ucode_credits_verify_app_store_purchase
Server-side verify of RevenueCat / store purchase (same as mobile). Requires packageId, transactionId, productId, platform (iOS/Android), and purchaseToken for Android.
ucode_disconnect
Sign out / unlink this ChatGPT conversation from Ucode. Clears the MCP session only (not account deletion). Use when the user asks to sign out, log out, disconnect, or switch accounts. Shows the welcome card with **Connect** again.
ucode_find_numbers
No sign-in needed. Search which apps/services (Telegram, WhatsApp, Google, OpenAI…) have virtual numbers in stock, by country, with the price in Ucode credits. Use this first whenever someone asks for a number or a price. Then: signed-in humans rent with ucode_sms_rent_packages → ucode_sms_rent_with_credits; autonomous agents use ucode_agent_buy_credits / ucode_agent_rent.
ucode_help
Optional natural-language help about Ucode features and flows. Uses the OpenAI key from Panel (Settings → ChatGPT App) when set, else OPENAI_API_KEY on the MCP host. Respects the “AI help” toggle in Panel.
ucode_instructions
Full product guide (read-only). **Not for the first message** — use **ucode_welcome** first. If the user is not signed in, call **ucode_welcome** / **ucode_login_start** instead of answering rental questions. Official site https://ucode.uk.
ucode_login_poll
Poll after **ucode_login_start**. Links the ChatGPT session when the user has finished in the browser — **call repeatedly** until complete; do not ask users to paste tokens or to type “done” as the only completion signal.
ucode_login_start
Creates a one-time browser sign-in URL. Prefer the in-card **Connect** button (**ucode_connect**). Poll **ucode_login_poll(sessionId)** until linked.
ucode_panel_ping
Public health check against Ucode Panel (no auth). Official downloads and info: https://ucode.uk — do not use unrelated domains (e.g. ucode.io).
ucode_payments_nowpayments_create
Creates a crypto invoice (NOWPayments) for human web/Telegram top-ups. ChatGPT humans should use **https://ucode.uk/app/credits** instead. Autonomous agents/bots must pay **USDC on Base via x402**, not NOWPayments.
ucode_payments_nowpayments_status
Poll invoice / payment status by NOWPayments id.
ucode_payments_stripe_create_checkout
**Do not use in ChatGPT.** In-card Stripe is blocked. For humans, call **ucode_render_credits** and open **https://ucode.uk/app/credits**. For agents/bots, call **ucode_agent_billing** and pay USDC on Base via x402.
ucode_payments_stripe_prices
**Rare.** Resolve fiat display for Stripe IDs — do **not** read raw **prod_**/ **price_** strings to end users; use **ucode_credit_packages** for storefront-style copy.
ucode_payments_stripe_verify
After Checkout completes, pass checkout **session id** plus **packageId** so Panel credits the account.
ucode_render_credits
Opens the **Add credits** card with the current wallet balance. Payments never happen in chat — the user taps through to **https://ucode.uk/app/credits**. After they add credits there, call **ucode_credits_status**. No payment details are collected in chat.
ucode_render_home
**Call on the first user message** in every new chat. Renders the interactive Ucode card with a **Connect Ucode account** button. Until linked, only welcome/connect/login tools — never rent or checkout.
ucode_render_services
Opens the **visual service picker** (popular apps + search). Call after sign-in or when the user wants a number — same data as **ucode_sms_summary** but optimized for the in-chat card.
ucode_services_catalog
Paginated Ucode service catalog with per-country availability from the Panel database.
ucode_session_status
Check whether this ChatGPT session is linked to Ucode. Use at chat start; if connected is false, run **ucode_render_home** — do not process rental requests. If they already have a live number, the card shows it.
ucode_sign_out
Same as **ucode_disconnect** — unlinks Ucode from this ChatGPT chat. Call for sign out, log out, or disconnect requests.
ucode_sms_active_rentals
Active/received rentals with SMS snippets if already fetched.
ucode_sms_cancel_rental
Cancel an active rental and refund credits when no SMS has arrived. Requires a cancel reason for analytics. Reasons: service_rejected | number_has_account | code_not_arrived | other. If an SMS arrives during cancel, credits stay charged and the code is returned.
ucode_sms_countries
Raw worldwide country id table — pairs with legacy APIs only. For renting, use **ucode_sms_summary** / **ucode_sms_service_detail** so users pick by country name + credits.
ucode_sms_get_code
Poll latest SMS for a rental id (provider rental id string).
ucode_sms_prices
**Avoid for ChatGPT users.** Uses backend USD-ish snapshots; assistants must guide rentals via credits-only summaries (**ucode_sms_summary**, **ucode_sms_service_detail**) and **ucode_sms_rent_packages**. Responses are partially sanitized.
ucode_sms_refund_expired
Trigger server-side refund scan for expired rentals (same as app).
ucode_sms_rent_packages
After user picks **serviceCode** + **country** (numeric id from summary/detail), list **credit-priced routes** only. Same package picker as the app (rentalFlowVersion 2). Present **credits**, recommended badge, labels — never quote USD or backend provider names.
ucode_sms_rent_provider_direct
**Do not use for ChatGPT end users.** Legacy rental against upstream balances — skips normal credit UX and exposes provider-era assumptions. Only **ucode_sms_rent_with_credits** with packages.
ucode_sms_rent_with_credits
**Primary rental** — charges Ucode credits. Always use **rentalFlowVersion: 2** and **packageId** from **ucode_sms_rent_packages** (matches mobile). Never mention wholesale/provider IDs or dollar amounts to the user.
ucode_sms_service_detail
Load one service’s countries after you have its short **serviceCode** (from summary `service` field). Matches opening that service in the iOS/Android app: availability, credits per country. Prefer over legacy `/prices` APIs.
ucode_sms_services
Low-level provider service codes — exposes internal naming. Do NOT use for normal rentals; prefer **ucode_sms_summary** or **ucode_sms_service_detail** then credits-only packages.
ucode_sms_summary
Primary discovery: search by app/service name (e.g. Telegram, WhatsApp). Returns services with countries, **credits** only (no provider names / no USD in assistant copy). Same idea as the app Services tab. Then **ucode_sms_service_detail** or go straight to **ucode_sms_rent_packages** once service + country are chosen.
ucode_sms_transactions
Provider ledger audit trail — sanitized before ChatGPT. Prefer explaining rentals via **ucode_sms_active_rentals** for users.
ucode_welcome
Same as **ucode_render_home** — product summary + sign-in card. Prefer **ucode_render_home** on first message.
ucode_whoami
Current linked Ucode user (requires ucode_login_poll complete or ucode_authenticate).
Endpoints
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://mcp.ucodesim.com/mcp | streamable-http | answering | 308 ms | 10 min ago |
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Ucode SMS — questions
Answers built from our own checks of this server.
What can Ucode SMS do?
It exposes 50 tools, read directly from the server on our last check. Among them: ucode_agent_billing, ucode_agent_buy_credits, ucode_agent_cancel, ucode_agent_check_sms, ucode_agent_quote, ucode_agent_rent and 44 more. 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 Ucode SMS 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 213 ms. The bar chart above shows every period we have measured.
How do I connect Ucode SMS?
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 Ucode SMS need an API key?
No. Ucode SMS completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 50 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Ucode SMS?
It answers our handshake in 213 ms on average, which is faster than 63% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.