Record x402 agent purchases as reconciled, auditable receipts; verify any receipt on the ledger.
Connect Runs on your machine
claude mcp add mcp -e X402RECEIPTS_EVM_PRIVATE_KEY=<X402RECEIPTS_EVM_PRIVATE_KEY> -e X402RECEIPTS_SOLANA_PRIVATE_KEY=<X402RECEIPTS_SOLANA_PRIVATE_KEY> -- npx -y [email protected]{
"mcpServers": {
"mcp": {
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"X402RECEIPTS_EVM_PRIVATE_KEY": "<X402RECEIPTS_EVM_PRIVATE_KEY>",
"X402RECEIPTS_SOLANA_PRIVATE_KEY": "<X402RECEIPTS_SOLANA_PRIVATE_KEY>"
}
}
}
}{
"mcpServers": {
"mcp": {
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"X402RECEIPTS_EVM_PRIVATE_KEY": "<X402RECEIPTS_EVM_PRIVATE_KEY>",
"X402RECEIPTS_SOLANA_PRIVATE_KEY": "<X402RECEIPTS_SOLANA_PRIVATE_KEY>"
}
}
}
}{
"servers": {
"mcp": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"X402RECEIPTS_EVM_PRIVATE_KEY": "<X402RECEIPTS_EVM_PRIVATE_KEY>",
"X402RECEIPTS_SOLANA_PRIVATE_KEY": "<X402RECEIPTS_SOLANA_PRIVATE_KEY>"
}
}
}
}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 |
|---|---|
X402RECEIPTS_EVM_PRIVATE_KEYOptional, secret | Optional. 0x… key holding USDC on Base; pays USD 1 per wallet per calendar month; later uploads that month are free. |
X402RECEIPTS_SOLANA_PRIVATE_KEYOptional, secret | Optional. ed25519 key (hex or base58) holding USDC on Solana. |
Details
| Package | [email protected] (NPM, stdio) |
| First published | 27 Sep 2026 |
| Last updated | 27 Sep 2026 |
| Registry name | com.x402receipts/mcp |
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