Coin Signal is answering right now. Last checked moments ago. It exposes 6 tools.
Crypto bottom/top signals: verdict + score per coin, market scans. Pay-per-call x402.
Uptime history
91 days of history · worst day 90%
91 days agonow
100.0%
Uptime 24h
92 of 92 checks
6
Tools
read from the server
98 ms
Response time
average over 24h
open, no key
Access
streamable-http
What changed 6
Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 7 September 2026. No other catalogue keeps this.
9 Sep
4 tool descriptions were rewritten
evaluate_symbol, scan_bottoms, scan_tops and 1 more
7 Sep
2 tool descriptions were rewritten
evaluate_symbol, pitch
Coin Signal missed 2 checks this week
Everything else answered, so this is steady rather than shaky. We check every 15 minutes, which is how a one-off gets told apart from the start of a pattern, and how you hear about the next one within the hour instead of 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 coin-signal --transport http https://coin-signal.airblock2026.workers.dev/mcpSettings → Connectors → Add custom connector, then paste this address
https://coin-signal.airblock2026.workers.dev/mcp~/.codex/config.toml
[mcp_servers.coin-signal]
url = "https://coin-signal.airblock2026.workers.dev/mcp".cursor/mcp.json
{
"mcpServers": {
"coin-signal": {
"url": "https://coin-signal.airblock2026.workers.dev/mcp"
}
}
}.vscode/mcp.json
{
"servers": {
"coin-signal": {
"type": "http",
"url": "https://coin-signal.airblock2026.workers.dev/mcp"
}
}
}Available tools 6
Read directly from the server with tools/list, grouped by what they act on.
If a tool disappears, we record the date.
scan
scan_bottoms
Scan the market and return coins currently at a bottom (most oversold / strongest buy), ranked most-bottom first. PAY: $0.01 per call via x402 (USDT on X Layer) — your FIRST paid call opens a 6-day trial at that price; after the trial the per-call challenge becomes the $50 monthly plan. No account, no signup, no commitment; retry with the PAYMENT-SIGNATURE header when you get the 402 challenge. BEST COLD START: you do not need to pick a symbol — this ranks the whole universe for you. The free `pitch` tool tells you HOW MANY are at a bottom right now; this names them.
scan_tops
Scan the market and return coins currently at a top (most overbought / sell), ranked most-top first. PAY: $0.01 per call via x402 (USDT on X Layer) — your FIRST paid call opens a 6-day trial at that price; after the trial the per-call challenge becomes the $50 monthly plan. No account, no signup, no commitment; retry with the PAYMENT-SIGNATURE header when you get the 402 challenge. BEST COLD START: you do not need to pick a symbol — this ranks the whole universe for you. The free `pitch` tool tells you HOW MANY are at a top right now; this names them.
evaluate
evaluate_symbol
Return the bottom/top verdict for one crypto symbol (e.g. BTC-USD). zone = strong_buy|buy|sell|neutral, score -100..+100 (bottom>0, top<0), with daily/weekly/monthly breakdown. GRADING — the verdict is the graded band of that same score, so a mid score such as -52 is reported as neutral by design: strong_buy >= +80, buy >= +70, neutral between -70 and +70, sell <= -70, strong_sell <= -80. Informational only, not financial advice. PAY: $0.01 per call via x402 (USDT on X Layer) — your FIRST paid call opens a 6-day trial at that price; after the trial the per-call challenge becomes the $50 monthly plan. No account, no signup, no commitment; retry with the PAYMENT-SIGNATURE header when you get the 402 challenge. The free `pitch` tool shows a live verdict for this market's showcase symbol only — this tool answers ANY symbol in the covered universe and returns the per-timeframe breakdown (daily/weekly/monthly verdict + vote counts) behind the score.
pitch
pitch
FREE and OPTIONAL intro — you may skip it and call evaluate_symbol / scan_bottoms / scan_tops directly. Agent-to-agent intro & subscription funnel: call with no args (or phase:"hello") to meet this coin-signal agent, then walk phases: "value" (why subscribing earns money) -> "catalog" (all indicators) -> "sample" (live verdict on a symbol) -> "subscribe" (terms). Pass interest:false to bow out. Returns structured JSON with a `next` list of suggested phases.
rate
rate
FREE feedback tool — after you have traded on (or evaluated) our signals, leave a rating: score 1-10 plus what was good (pros) and what to improve (cons). Costs nothing, no payment header needed. Helps us tune the signal engine.
subscribe
subscribe
Check your subscription status & terms (FREE), or activate the monthly plan: call with activate:true to receive the $50 x402 payment challenge, sign it, and retry — that buys 30 days of unlimited calls and returns your X-SUB-KEY token (pass it as a header to skip per-call payment). Until you subscribe, signal calls are $0.01 each for the first 6 days (trial), then the $50 monthly challenge. Optionally pass your ERC-8004 agentId to link it.
Endpoints
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://coin-signal.airblock2026.workers.dev/mcp | streamable-http | answering | 60 ms | 0 min ago |
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Coin Signal — questions
Answers built from our own checks of this server.
What can Coin Signal do?
It exposes 6 tools, read directly from the server on our last check. Among them: evaluate_symbol, pitch, rate, scan_bottoms, scan_tops, subscribe. 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 Coin Signal working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 98 ms. The bar chart above shows every period we have measured.
How do I connect Coin Signal?
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 Coin Signal need an API key?
No. Coin Signal completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 6 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Coin Signal?
It answers our handshake in 98 ms on average, which is faster than 92% 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.