Sentinel is answering right now. Last checked 10 min ago. It exposes 2 tools.
Pay-per-call safety checks for AI agents: screen a crypto address or URL before you transact.
Today is the operative word: we check Sentinel every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.
Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 10 min ago.
claude mcp add sentinel --transport http https://448c.org/mcp
{
"mcpServers": {
"sentinel": {
"url": "https://448c.org/mcp"
}
}
}
[mcp_servers.sentinel]
url = "https://448c.org/mcp"
{
"mcpServers": {
"sentinel": {
"url": "https://448c.org/mcp"
}
}
}
{
"mcpServers": {
"sentinel": {
"url": "https://448c.org/mcp"
}
}
}
Read directly from the server with tools/list, grouped by what they act on.
If a tool disappears, we record the date.
check_address
check_url
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://448c.org/mcp | streamable-http | answering | 201 ms | 10 min ago |
Pre-send risk check for AI agents that move money — screen an address or payment URL before sending.
Crypto transaction safety tool — screens addresses and transactions for scam risk.
50+ pay-per-call APIs for AI agents — images, LLM, code, crypto, travel & more via x402
Pay-per-call crypto data for AI agents. USDC on Base via x402. No API key.
MCP server for AML address verification and transaction screening via Crypto APIs
Pay-per-call crypto data for AI agents. USDC.e on Tempo via MPP. No API key.
Pay-per-call data tools for AI agents: crypto signal, web reader, SEO audit. x402 USDC on Base.
19 pay-per-call data tools for AI agents: crypto/DeFi, web, PDF, FX, weather, DNS. x402 on Base.
Answers built from our own checks of this server.