Subtensor MCP Server

by subtensor Your server? Claim it

answering

Subtensor MCP is answering right now. Last checked 6 min ago. It exposes 7 tools.

Subtensor blockchain reference — events, calls, storage, constants, errors for all 28 active pallets

Uptime history 19 days of history · worst day 99%

19 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

420 ms

Response time

average over 24h

open, no key

Access

streamable-http

Nothing serious here today

Today is the operative word: we check Subtensor MCP every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 6 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add reference --transport http https://subtensor.com/mcp

Settings → Connectors → Add custom connector, then paste this address

https://subtensor.com/mcp

~/.codex/config.toml

[mcp_servers.reference]
url = "https://subtensor.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "reference": {
      "url": "https://subtensor.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "reference": {
      "type": "http",
      "url": "https://subtensor.com/mcp"
    }
  }
}

Available tools 7

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

subtensor

subtensor_decode

Decode SCALE-encoded hex into labelled fields with RAO→TAO and hex→SS58 conversions applied. Omit pallet and name to identify an event or call from its two-byte (pallet index, item index) prefix — the usual case when you have bytes and want to know what they are.

subtensor_explain

Understand Bittensor concepts, workflows, mechanisms, runtime APIs, runtime errors, extrinsic format, or get code examples.

subtensor_explore

Explore relationships, version history, removed items, changelogs, and migration guides between runtime versions.

subtensor_list

Browse items by category: pallets, events, calls, storage, constants, errors, types, runtime APIs, RPC methods, protocol accounts, EVM precompiles, mechanisms, workflows, hyperparameters, cli_flags, build_features, chain_specs, or env_vars.

subtensor_lookup

Get detailed info about a specific pallet, event, call, storage item, constant, error, SCALE type, RPC method, protocol account, or EVM precompile. Accepts URN identifiers with optional #field.path drilling.

subtensor_preferences

Get or set session preferences for language, node URL, and node type. Language affects field name casing (TypeScript=camelCase, others=snake_case) and code examples.

subtensor_search

Search across all Subtensor pallets, events, calls, storage, constants, and errors by keyword.

Endpoints

URL	Transport	State	Latency	Checked
https://subtensor.com/mcp	streamable-http	answering	453 ms	6 min ago

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Subtensor MCP — questions

Answers built from our own checks of this server.

What can Subtensor MCP do?

It exposes 7 tools, read directly from the server on our last check. Among them: subtensor_decode, subtensor_explain, subtensor_explore, subtensor_list, subtensor_lookup, subtensor_preferences and 1 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Subtensor MCP working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 420 ms. The bar chart above shows every period we have measured.

How do I connect Subtensor MCP?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Subtensor MCP need an API key?

No. Subtensor MCP completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 7 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Subtensor MCP?

It answers our handshake in 420 ms on average, which is faster than 29% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.