Arc Agents MCP: ERC-8004 agent data from Arc Mainnet. $0.002 USDC per successful request via x402.
Connect Runs on your machine
claude mcp add arcagents-mcp -e EVM_PRIVATE_KEY=<EVM_PRIVATE_KEY> -e ARCAGENTS_PAYMENT_NETWORK=<ARCAGENTS_PAYMENT_NETWORK> -e ARCAGENTS_MAX_PAYMENTS=<ARCAGENTS_MAX_PAYMENTS> -e ARCAGENTS_TIMEOUT_MS=<ARCAGENTS_TIMEOUT_MS> -e ARCAGENTS_STATE_DIR=<ARCAGENTS_STATE_DIR> -- npx -y [email protected]{
"mcpServers": {
"arcagents-mcp": {
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"EVM_PRIVATE_KEY": "<EVM_PRIVATE_KEY>",
"ARCAGENTS_PAYMENT_NETWORK": "<ARCAGENTS_PAYMENT_NETWORK>",
"ARCAGENTS_MAX_PAYMENTS": "<ARCAGENTS_MAX_PAYMENTS>",
"ARCAGENTS_TIMEOUT_MS": "<ARCAGENTS_TIMEOUT_MS>",
"ARCAGENTS_STATE_DIR": "<ARCAGENTS_STATE_DIR>"
}
}
}
}{
"mcpServers": {
"arcagents-mcp": {
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"EVM_PRIVATE_KEY": "<EVM_PRIVATE_KEY>",
"ARCAGENTS_PAYMENT_NETWORK": "<ARCAGENTS_PAYMENT_NETWORK>",
"ARCAGENTS_MAX_PAYMENTS": "<ARCAGENTS_MAX_PAYMENTS>",
"ARCAGENTS_TIMEOUT_MS": "<ARCAGENTS_TIMEOUT_MS>",
"ARCAGENTS_STATE_DIR": "<ARCAGENTS_STATE_DIR>"
}
}
}
}{
"servers": {
"arcagents-mcp": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"EVM_PRIVATE_KEY": "<EVM_PRIVATE_KEY>",
"ARCAGENTS_PAYMENT_NETWORK": "<ARCAGENTS_PAYMENT_NETWORK>",
"ARCAGENTS_MAX_PAYMENTS": "<ARCAGENTS_MAX_PAYMENTS>",
"ARCAGENTS_TIMEOUT_MS": "<ARCAGENTS_TIMEOUT_MS>",
"ARCAGENTS_STATE_DIR": "<ARCAGENTS_STATE_DIR>"
}
}
}
}Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.
Tools
This server runs locally, so its tools are listed by your MCP client once it starts.
Environment variables
| Name | Description |
|---|---|
EVM_PRIVATE_KEYRequired, secret | Private key of a dedicated wallet holding a small USDC balance on the payment network. Pays $0.002 per request via x402. |
ARCAGENTS_PAYMENT_NETWORKOptional | Payment network: arc (default) or base. ERC-8004 data always comes from Arc Mainnet. |
ARCAGENTS_MAX_PAYMENTSOptional | Maximum payments signed per session (integer 1-1000, default 50). |
ARCAGENTS_TIMEOUT_MSOptional | Total timeout for one tool call in milliseconds (1000-120000, default 30000). |
ARCAGENTS_STATE_DIROptional | Absolute path of a private directory for signed but unresolved payments, so they are resent, never replaced, after a restart (default ~/.arcagents-mcp). |
Details
| Package | [email protected] (NPM, stdio) |
| First published | 14 Nov 2026 |
| Last updated | 14 Nov 2026 |
| Registry name | io.github.Nomad07/arcagents-mcp |
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