Kortex is listed as active in the registry but did not answer our last check. It exposes 10 tools.
Which x402 service actually works: uptime, valid 402, and settlements proven on-chain.
Uptime history
77 days of history · worst day 0%
77 days agonow
0.0%
Uptime 24h
0 of 92 checks
10
Tools
read from the server
378 ms
Response time
average over 24h
open, no key
Access
streamable-http
Kortex does not always answer
Over the last week it answered 0.0% 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 0 min ago.
run in your terminal
claude mcp add kortex --transport http https://kortex.rohnelt.dev/mcpSettings → Connectors → Add custom connector, then paste this address
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
{
"servers": {
"kortex": {
"type": "http",
"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 | 378 ms | 0 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 0 of 92 checks got a reply (0.0%), average response time 378 ms. The bar chart above shows every period we have measured.
The registry lists Kortex as active — why does it not respond?
The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.
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 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 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.