Interact with Counterparty — the token protocol on Bitcoin. Query, compose, sign.
Connect Runs on your machine
claude mcp add mcp-server -e COUNTERPARTY_NODE=<COUNTERPARTY_NODE> -e SIGNER_PRIVATE_KEY=<SIGNER_PRIVATE_KEY> -e SIGNER_ADDRESS=<SIGNER_ADDRESS> -- npx -y @21e14/[email protected]{
"mcpServers": {
"mcp-server": {
"command": "npx",
"args": [
"-y",
"@21e14/[email protected]"
],
"env": {
"COUNTERPARTY_NODE": "<COUNTERPARTY_NODE>",
"SIGNER_PRIVATE_KEY": "<SIGNER_PRIVATE_KEY>",
"SIGNER_ADDRESS": "<SIGNER_ADDRESS>"
}
}
}
}{
"mcpServers": {
"mcp-server": {
"command": "npx",
"args": [
"-y",
"@21e14/[email protected]"
],
"env": {
"COUNTERPARTY_NODE": "<COUNTERPARTY_NODE>",
"SIGNER_PRIVATE_KEY": "<SIGNER_PRIVATE_KEY>",
"SIGNER_ADDRESS": "<SIGNER_ADDRESS>"
}
}
}
}{
"servers": {
"mcp-server": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@21e14/[email protected]"
],
"env": {
"COUNTERPARTY_NODE": "<COUNTERPARTY_NODE>",
"SIGNER_PRIVATE_KEY": "<SIGNER_PRIVATE_KEY>",
"SIGNER_ADDRESS": "<SIGNER_ADDRESS>"
}
}
}
}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 |
|---|---|
COUNTERPARTY_NODEOptional | Counterparty node URL (default: https://api.counterparty.io:4000) |
SIGNER_PRIVATE_KEYOptional, secret | WIF-encoded private key for transaction signing |
SIGNER_ADDRESSOptional | Bitcoin address for the signing key |
Details
| Package | @21e14/[email protected] (NPM, stdio) |
| First published | 11 Feb 2026 |
| Last updated | 11 Feb 2026 |
| Registry name | io.github.XCP/mcp-server |
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