MCP server for building unsigned transactions on EVM, Tezos, Solana, Kaspa, XRP, UTXO, Tron
Connect Runs on your machine
claude mcp add mcp-prepare-transactions -e CRYPTOAPIS_API_KEY=<CRYPTOAPIS_API_KEY> -- npx -y @cryptoapis-io/[email protected]
{
"mcpServers": {
"mcp-prepare-transactions": {
"command": "npx",
"args": [
"-y",
"@cryptoapis-io/[email protected]"
],
"env": {
"CRYPTOAPIS_API_KEY": "<CRYPTOAPIS_API_KEY>"
}
}
}
}
{
"mcpServers": {
"mcp-prepare-transactions": {
"command": "npx",
"args": [
"-y",
"@cryptoapis-io/[email protected]"
],
"env": {
"CRYPTOAPIS_API_KEY": "<CRYPTOAPIS_API_KEY>"
}
}
}
}
{
"servers": {
"mcp-prepare-transactions": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@cryptoapis-io/[email protected]"
],
"env": {
"CRYPTOAPIS_API_KEY": "<CRYPTOAPIS_API_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 |
|---|---|
CRYPTOAPIS_API_KEYRequired, secret | Crypto APIs API key |
Details
| Package | @cryptoapis-io/[email protected] (NPM, stdio) |
| First published | 13 Nov 2026 |
| Last updated | 13 Nov 2026 |
| Registry name | io.github.CryptoAPIs-io/mcp-prepare-transactions |
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