Cross-chain bridge and swap quotes, fee estimation, and transaction tracking via Relay Protocol.
Connect Runs on your machine
claude mcp add relay-mcp -e RELAY_API_KEY=<RELAY_API_KEY> -e RELAY_API_URL=<RELAY_API_URL> -- npx -y @relayprotocol/[email protected]
{
"mcpServers": {
"relay-mcp": {
"command": "npx",
"args": [
"-y",
"@relayprotocol/[email protected]"
],
"env": {
"RELAY_API_KEY": "<RELAY_API_KEY>",
"RELAY_API_URL": "<RELAY_API_URL>"
}
}
}
}
{
"mcpServers": {
"relay-mcp": {
"command": "npx",
"args": [
"-y",
"@relayprotocol/[email protected]"
],
"env": {
"RELAY_API_KEY": "<RELAY_API_KEY>",
"RELAY_API_URL": "<RELAY_API_URL>"
}
}
}
}
{
"servers": {
"relay-mcp": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@relayprotocol/[email protected]"
],
"env": {
"RELAY_API_KEY": "<RELAY_API_KEY>",
"RELAY_API_URL": "<RELAY_API_URL>"
}
}
}
}
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 |
|---|---|
RELAY_API_KEYOptional, secret | Optional API key for higher rate limits |
RELAY_API_URLOptional | Relay API base URL (default: https://api.relay.link) |
Details
| Package | @relayprotocol/[email protected] (NPM, stdio) |
| First published | 10 Mar 2026 |
| Last updated | 10 Mar 2026 |
| Registry name | io.github.relayprotocol/relay-mcp |
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