Arc Treasury runs on your own machine — the client starts it, so there is no endpoint to ping. 54 installs a week from npm.
What USDC and EURC really earn on Arc, by deposit size: Aave v4 and Morpho read directly. x402.
Today is the operative word: we check Arc Treasury every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.
This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.
claude mcp add arc-treasury-mcp -- npx -y arc-treasury-mcp
{
"mcpServers": {
"arc-treasury-mcp": {
"command": "npx",
"args": [
"-y",
"arc-treasury-mcp"
]
}
}
}
[mcp_servers.arc-treasury-mcp]
command = "npx"
args = ["-y", "arc-treasury-mcp"]
{
"mcpServers": {
"arc-treasury-mcp": {
"command": "npx",
"args": [
"-y",
"arc-treasury-mcp"
]
}
}
}
{
"servers": {
"arc-treasury-mcp": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"arc-treasury-mcp"
]
}
}
}
Optional settings from the registry entry, left out of the block above:
PAY_WALLET_KEY (Optional. Private key of a funded Circle Gateway wallet, for the paid tools. Free tools need nothing), PAY_CHAIN (Optional. Where that wallet holds USDC: arc, base, arbitrum or hyperEvm. Default arc), PAY_MAX_USDC_PER_CALL (Optional. The most one call may cost before the tool refuses to pay. Default 0.05).
Current I bond rate, what your I bond earns by issue month, and value estimates from TreasuryDirect.
x402-paid tools: text to 3D-printable STL, web search, and search+read. USDC on Base.
Earnings research on US stocks: what options price for a report, and PEAD model signals after it.
Is this transaction safe to sign? Decodes what it really does and answers allow, warn or block.
Pay for APIs with USDC. Read-only x402 payment discovery, verification, evidence, and status.
Search the SitePatent directory of websites and tools. Read-only, no API key.
Treasury/FRED financial data over x402: pay-per-call US yields, macro and forex in USDC on Base
Pay-per-call agent services, a job board and escrowed jobs in USDC on Arc via x402.
Answers built from our own checks of this server.