Kortex MCP Server

by rohnelt-kortex Your server? Claim it

answering

Kortex is answering right now. Last checked 11 min ago. It exposes 10 tools.

Which x402 service actually works: uptime, valid 402, and settlements proven on-chain.

Uptime history 25 days of history

25 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

417 ms

Response time

average over 24h

open, no key

Access

streamable-http

Nothing serious here today

Today is the operative word: we check Kortex every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 11 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add kortex --transport http https://kortex.rohnelt.dev/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "kortex": {
      "url": "https://kortex.rohnelt.dev/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.kortex]
url = "https://kortex.rohnelt.dev/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "kortex": {
      "url": "https://kortex.rohnelt.dev/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "kortex": {
      "url": "https://kortex.rohnelt.dev/mcp"
    }
  }
}

Available tools 10

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

capabilities

capabilities

Return the full machine-readable manifest of Kortex: every operation, its price in USD, its input schema and how to pay. Free. When to use: Call this first if you have never used Kortex and want to know what it can do and what it costs. Price: Free.

check

check

Everything Kortex knows about a single resource URL: whether it is up, whether its 402 is well formed, what it quotes, and whether its payout address has ever been paid on-chain. Returns a verdict, not just data. When to use: Call this when you already have a URL and want to know whether sending money to it is a good idea. Worth it above roughly US$0.05 a call; below that the check costs more than the risk. Price: US$0.002000 per call.

compare

compare

Score two or more resource URLs side by side on the same evidence, and say which one to pay. When to use: Call this when you already have a shortlist and need to pick. Cheaper than calling check once per URL. Price: US$0.003000 per call.

credit

credit_deposit

Buy Kortex credit with USDC on Base over x402. One on-chain settlement, then every call is debited off-chain. When to use: Call when your balance is low. Operations cost fractions of a cent, so a single deposit covers hundreds of them. Price: Free.

history

history

The full time series behind a score: every probe outcome, every price and payout-address change, and the on-chain settlement history of the address it pays to. When to use: Call this when a verdict surprises you, or before committing to a service you plan to depend on. This is the evidence itself rather than the summary. Price: US$0.002000 per call.

identity

identity_create

Turn a wallet address into a permanent Kortex identity and an API token. Free, and grants a small trial credit. When to use: Call this once, before anything else. You need the returned token for every other call. No account, no email, no human. Price: Free.

report

report

Tell Kortex that you paid a service and what you got. Free, and only counted once the payment is found on-chain — so a report costs at least the price of the call it describes. When to use: Call this after any paid call that went wrong, and after ones that went right. It is free, it makes every later verdict better, and the evidence it adds is the kind no probe can produce. Price: Free.

resolve

resolve

Describe what you need in plain language and get back x402 services ranked by evidence: how much of the time they have been up, whether they answer with a valid 402, and how many distinct wallets have actually paid them on-chain. One entry per operator, not per URL. When to use: Call this before paying a service you have not used, and instead of taking the first result from a directory. Of the services listed as x402 today, measured across 1,015 of them, only 25% actually answer with a payment requirement — the rest are up but sell nothing. Price: US$0.005000 per call.

watch

watch

Register interest in a service. Kortex records a watch and reports what has changed — price, payout address, or availability — the next time you ask. When to use: Call this for a service you depend on. A payout address that moves is the strongest warning signal there is, and you will not notice it by yourself. Price: US$0.005000 per call.

whoami

whoami

Your handle, wallet, balance and usage. Free. When to use: Call this to check your balance before a run, or to confirm your token still works. Price: Free.

Endpoints

URL	Transport	State	Latency	Checked
https://kortex.rohnelt.dev/mcp	streamable-http	answering	388 ms	11 min ago

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Kortex — questions

Answers built from our own checks of this server.

What can Kortex do?

It exposes 10 tools, read directly from the server on our last check. Among them: capabilities, check, compare, credit_deposit, history, identity_create and 4 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 Kortex 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 417 ms. The bar chart above shows every period we have measured.

How do I connect Kortex?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Kortex need an API key?

No. Kortex completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 10 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Kortex?

It answers our handshake in 417 ms on average, which is faster than 36% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.