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Nanotoll MCP Server

by nanotoll owner confirmed
answering

Nanotoll MCP is answering right now. Last checked 4 min ago. It exposes 2 tools.

Compress prose for LLM context windows. Per-call USDC billing, signed receipt.

Uptime history 83 days of history · worst day 0%
83 days agonow
100.0%
Uptime 24h
91 of 91 checks
2
Tools
read from the server
191 ms
Response time
average over 24h
open, no key
Access
streamable-http

What changed 34

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 29 August 2026. No other catalogue keeps this.

27 Oct a tool changed the parameters it asks for3 times that day compress
27 Oct a tool description was rewritten compress
27 Oct a tool appeared check_balance
26 Oct a tool changed the parameters it asks for compress
24 Oct a tool description was rewritten2 times that day compress
23 Oct 8 tools disappeared convert, diff, estimate and 5 more
23 Oct a tool appeared compress
21 Sep a tool changed version
31 Aug a tool appeared read
31 Aug a tool changed the parameters it asks for prune
and 17 more, back to 29 August 2026

Tools have disappeared from this server

A tool that vanishes takes a piece of your agent with it, and the change arrives silently. Watch this server and every such change lands in your inbox.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 4 min ago.

If the config below does not start, the author’s own setup guide covers it: nanotoll.dev.

run in your terminal
claude mcp add nanotoll-mcp --transport http https://mcp.nanotoll.dev/mcp
Settings → Connectors → Add custom connector, then paste this address
https://mcp.nanotoll.dev/mcp
~/.codex/config.toml
[mcp_servers.nanotoll-mcp]
url = "https://mcp.nanotoll.dev/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "nanotoll-mcp": {
      "url": "https://mcp.nanotoll.dev/mcp"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "nanotoll-mcp": {
      "type": "http",
      "url": "https://mcp.nanotoll.dev/mcp"
    }
  }
}

Available tools 2

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

balance
check_balance
Read your own account and cost nothing: credit balance left, the USDC funding address to top up, key tier and expiry, and lifetime usage totals. Takes no arguments and is not billed. Call it after an HTTP 402 from compress to see the shortfall, or before a long batch to confirm credit. It reads the account belonging to the API key in your MCP client config (Authorization: Bearer ...) - that is the balance compress bills against.
compress
compress
Compress prose before it enters an LLM context window. Returns the compressed text plus a signed receipt (ratios, refusals, coverage) so the caller can verify what was dropped. Use this instead of truncating or slicing text to fit a budget: truncation drops the tail silently, compression keeps a sentence skeleton and reports what went. Do not use it for source code, config, JSON, diffs or tables - send those verbatim. Very short input (under roughly 2,000 chars) gains little, and verified mode is slower there. To compress a web page, fetch it with the read tool first and compress the markdown it returns, never raw HTML. Prefer deterministic for bulk low-stakes text (free), extractive for ordinary prose, verified when a silently dropped fact would be expensive. Flat per-call price by mode: deterministic free, extractive $0.0008, verified $0.0015 (USDC on Base L2); insufficient credit returns HTTP 402.

Tools removed

Tools this server used to expose. Anything built against them stopped working on the day they went.

convert
removed 23 Oct 2026
diff
removed 23 Oct 2026
estimate
removed 23 Oct 2026
generate
removed 23 Oct 2026
patch
removed 23 Oct 2026
prune
removed 23 Oct 2026
read
removed 23 Oct 2026
validate
removed 23 Oct 2026

Endpoints

URLTransportStateLatencyChecked
https://mcp.nanotoll.dev/mcp streamable-http answering 177 ms 4 min ago

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Nanotoll MCP — questions

Answers built from our own checks of this server.

What can Nanotoll MCP do?
It exposes 2 tools, read directly from the server on our last check. Among them: check_balance, compress. 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 Nanotoll MCP 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 191 ms. The bar chart above shows every period we have measured.
Did Nanotoll MCP ever remove tools?
Yes. convert, diff, estimate, generate and 4 more are no longer exposed — we recorded the date each one disappeared. A tool vanishing usually means a breaking change for anything that depended on it.
How do I connect Nanotoll MCP?
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 Nanotoll MCP need an API key?
No. Nanotoll MCP completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 2 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Nanotoll MCP?
It answers our handshake in 191 ms on average, which is faster than 75% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.