Stellar Pulse MCP Server

stellar-pulse-mcp

Read-only Stellar analytics for AI assistants, over the Model Context Protocol. Ask Claude (or any MCP client) about network health and fees, asset quality, DEX order books, accounts and DeFi on Stellar, and get structured answers from public APIs. No API keys. No signing. No transactions.

Existing Stellar MCP servers focus on building and sending transactions or developing Soroban contracts. This one is for the other half of the job: understanding what is happening on the network, and spotting what is not trustworthy.

Example prompts:

• "Is the Stellar network congested right now, and what are fees doing?"
• "Is this USDC the real one?" (give it USDC-G...; it checks the issuer, domain, holders and rating)
• "How deep is the XLM/USDC book on the SDEX, and what is the spread?"
• "How much XLM can this account actually spend?"
• "What are the biggest DeFi protocols on Stellar and which are growing?"

Why the safety details matter

• Many assets share a code. Anyone can issue a token called USDC. stellar_asset picks the most traded one when you give only a code, tells you how many others use the same code, and flags issuers with no verified home domain, a low rating, very few holders or no volume.
• Secret keys are refused. A value starting with S is rejected immediately, before any network call, and never echoed back. Public addresses (starting with G) are all this server ever needs.
• Spendable XLM is computed, not guessed: (2 + subentries + sponsoring - sponsored) x base reserve, minus XLM locked in open offers, with the reserve read from the latest ledger.

Install

Requires Node.js 20 or newer. The quickest way is npx, no clone needed:

Claude Code

claude mcp add stellar-pulse -- npx -y stellar-pulse-mcp

On Windows, run it from cmd (PowerShell swallows the --) and wrap npx so Claude Code can start it:

claude mcp add stellar-pulse -- cmd /c npx -y stellar-pulse-mcp

Add -s user to make it available in every folder, not just the current project.

Claude Desktop

{
  "mcpServers": {
    "stellar-pulse": {
      "command": "npx",
      "args": ["-y", "stellar-pulse-mcp"]
    }
  }
}

On Windows use "command": "cmd" with "args": ["/c", "npx", "-y", "stellar-pulse-mcp"].

Published on npm and in the official MCP Registry as io.github.markankamaransheogarat-sys/stellar-pulse-mcp.

To run it from source instead:

git clone https://github.com/markankamaransheogarat-sys/stellar-pulse-mcp.git
cd stellar-pulse-mcp
npm install
npm run build
node dist/index.js

Details

• Data sources: Horizon (ledgers, fees, accounts, order books), StellarExpert (asset statistics and ratings) and DefiLlama (TVL). Mainnet only.
• Units: Horizon amounts are decimal units; StellarExpert supplies and volumes come in stroops and are converted (1 XLM = 10,000,000 stroops).
• One source down is not a failure. Where a tool combines sources, it answers from what is reachable and lists what failed in an errors field.
• Caching: 3 to 4 seconds for ledger-level data, 60 seconds for StellarExpert, 5 minutes for DefiLlama, so free tiers are not hammered. Simultaneous identical requests share one call.
• Depth counts the best 100 levels per side of the SDEX book. Liquidity pools and Soroban DEXes are not included.
• Not financial advice. Snapshots of public data, seconds to minutes old.

Development

npm run typecheck   # tsc --noEmit over src and tests
npm test            # vitest, all HTTP mocked
npm run build       # compile to dist/
npm run smoke       # live check against the real APIs (needs a build first)

src/sources/* talk to one API each, src/tools/* hold the logic and register one MCP tool each, src/stellar.ts validates account ids and asset references, src/http.ts is the shared client (timeout, bounded retries, TTL cache).

A sibling project, crypto-pulse-mcp, does the same for cross-exchange prices, perpetual funding and stablecoin flows.

License

MIT