swiftnodes-mcp

An MCP (Model Context Protocol) server for SwiftNodes — multi-chain blockchain RPC, exposed to AI agents.

One API key, 75+ chains, flat-rate pricing. This server gives Claude, ChatGPT, Cursor, and any MCP client live, factual answers about chains, pricing, and JSON-RPC method support — plus the ability to probe any EVM endpoint directly.

Tools

| Tool | What it does | |---|---| | list_chains | Every chain SwiftNodes serves — name, slug, chain ID, category, docs page. Filterable. | | get_chain | Full detail for one chain: IDs, block time, native currency, HTTP/WebSocket/archive endpoint templates, docs links. | | get_pricing | Live flat-rate plans from the public API — rate limits, included features, no compute units. | | get_method_support | Which JSON-RPC methods work on which chain — auto-probed weekly through the same path customer requests take. Overview or per-method detail. | | probe_endpoint | Diagnose any EVM JSON-RPC endpoint (ours or anyone's): chain identity, block height, archive capability, latency — or run a specific method call. |

Install

Zero dependencies, Node >= 18.

From this repo:

git clone https://github.com/swiftnodes/swiftnodes-mcp
node swiftnodes-mcp/bin/server.js   # speaks MCP over stdio

Via npm (once published): npx -y swiftnodes-mcp

Claude Desktop

{
  "mcpServers": {
    "swiftnodes": {
      "command": "node",
      "args": ["/path/to/swiftnodes-mcp/bin/server.js"]
    }
  }
}

Cursor / any MCP client

Add a stdio server with command node and args ["/path/to/swiftnodes-mcp/bin/server.js"].

Data sources

• Chains — bundled snapshot generated from the SwiftNodes site source of truth (scripts/generate-chains-data.mjs; regenerate after chain changes).
• Pricing — fetched live from https://rpc.swiftnodes.io/api/plans (bundled fallback if unreachable).
• Method support — fetched live from https://swiftnodes.io/method-matrix.json, re-probed weekly. Support values reflect the real customer path, including failover.

Notes

probe_endpoint will call any http(s) URL you give it — the same ground our CLI diagnostic rpc-doctor covers. Probe responsibly: one quick pass per endpoint, not a load test.

Questions: swiftnodes.io — free tier, no KYC.

License

MIT — see LICENSE.