MCP Prepare Transactions runs on your own machine — the client starts it, so there is no endpoint to ping. 111 installs a week from npm. Last commit 28 Sep 2026.
MCP server for building unsigned transactions on EVM, Tezos, Solana, Kaspa, XRP, UTXO, Tron
Today is the operative word: we check MCP Prepare Transactions 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 mcp-prepare-transactions -e 'CRYPTOAPIS_API_KEY=<CRYPTOAPIS_API_KEY>' -- npx -y @cryptoapis-io/mcp-prepare-transactions
{
"mcpServers": {
"mcp-prepare-transactions": {
"command": "npx",
"args": [
"-y",
"@cryptoapis-io/mcp-prepare-transactions"
],
"env": {
"CRYPTOAPIS_API_KEY": "<CRYPTOAPIS_API_KEY>"
}
}
}
}
[mcp_servers.mcp-prepare-transactions]
command = "npx"
args = ["-y", "@cryptoapis-io/mcp-prepare-transactions"]
env = { CRYPTOAPIS_API_KEY = "<CRYPTOAPIS_API_KEY>" }
{
"mcpServers": {
"mcp-prepare-transactions": {
"command": "npx",
"args": [
"-y",
"@cryptoapis-io/mcp-prepare-transactions"
],
"env": {
"CRYPTOAPIS_API_KEY": "<CRYPTOAPIS_API_KEY>"
}
}
}
}
{
"servers": {
"mcp-prepare-transactions": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@cryptoapis-io/mcp-prepare-transactions"
],
"env": {
"CRYPTOAPIS_API_KEY": "<CRYPTOAPIS_API_KEY>"
}
}
}
}
Put your own value in place of
<CRYPTOAPIS_API_KEY> (Crypto APIs API key).
The author’s registry entry marks it as required.
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Answers built from our own checks of this server.