Read-only NATS and JetStream observability: trace a request across streams, rank what is broken.
Connect Runs on your machine
claude mcp add nats-trail -e NATS_TRAIL_API=<NATS_TRAIL_API> -e NATS_TRAIL_TOKEN=<NATS_TRAIL_TOKEN> -- npx -y @nats-trail/[email protected]{
"mcpServers": {
"nats-trail": {
"command": "npx",
"args": [
"-y",
"@nats-trail/[email protected]"
],
"env": {
"NATS_TRAIL_API": "<NATS_TRAIL_API>",
"NATS_TRAIL_TOKEN": "<NATS_TRAIL_TOKEN>"
}
}
}
}{
"mcpServers": {
"nats-trail": {
"command": "npx",
"args": [
"-y",
"@nats-trail/[email protected]"
],
"env": {
"NATS_TRAIL_API": "<NATS_TRAIL_API>",
"NATS_TRAIL_TOKEN": "<NATS_TRAIL_TOKEN>"
}
}
}
}{
"servers": {
"nats-trail": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@nats-trail/[email protected]"
],
"env": {
"NATS_TRAIL_API": "<NATS_TRAIL_API>",
"NATS_TRAIL_TOKEN": "<NATS_TRAIL_TOKEN>"
}
}
}
}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 |
|---|---|
NATS_TRAIL_APIOptional | URL of the NATS Trail bridge, e.g. http://127.0.0.1:4000. Without it the server answers only from local state and cannot reach JetStream. |
NATS_TRAIL_TOKENOptional, secret | Bearer token for the bridge, required when it has auth enabled. A read-scoped token is enough: this server never mutates. |
Details
| Package | @nats-trail/[email protected] (NPM, stdio) |
| First published | 3 Oct 2026 |
| Last updated | 3 Oct 2026 |
| Registry name | io.github.solsolettidev/nats-trail |
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