io.github.mrfentmen/helius-mcp

helius-mcp

Is the io.github.mrfentmen/helius-mcp MCP server down? No. It answered initialize and tools/list in the probe of 2026-10-31.

Helius Solana API: balances, transactions, NFTs, token metadata.

alive probed 2026-11-15 · unchanged since 2026-10-31

5tools

740tokens in Claude Opus 5.5

0.4 %of Claude's 200k window

0.3×the median server

319 msto initialize

11 msto list tools

Run it: npx -y @mrfentmen/helius-mcp@1.0.1 (stdio, probed in a container with the network off)
Host: npmjs.com
Reports itself as: helius-mcp 1.0.0
Capabilities: tools
Instructions: none
Of a 1M window: <0.1 % of a 1M context window
Count: 740 tokens in Claude Opus 5.5, exact, measured 2026-10-17. With the Claude Code prefix mcp__…__ on each tool name: 795. The o200k_base estimate is 395. Counted again when the tool definitions change. Method.
Repository: https://github.com/mrfentmen/premium-mcps
Registry: active, updated 2026-10-01 · registry entry

Most expensive tools

The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.87×.

Tool	≈ Claude tokens	o200k estimate	Share of this server
get_nfts	161	86	22 %
get_transactions	157	84	21 %
get_token_metadata	146	78	20 %
parse_transactions	139	74	19 %
get_balances	137	73	18 %

Other registry entries on npmjs.com, the ones next to this name; all of them.

Servers that mention helius.

The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.

Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.