RGX — MCP server

MCP client for RGX: tool discovery, reranking, and on-chain pricing-truth for AI agents — pay-per-call in USDC on Base (x402), free tier, no signup.

Hosted API: https://rgx.tail817c3b.ts.net — set it as RGX_API.

Chains: base, ethereum, arbitrum.

Why

• Snap Router — the tool-retrieval bottleneck: past ~2,000 tools, semantic retrieval beats keyword and beats long-context. Coinbase's Bazaar /ask is LLM-ranked (a model call on every task); 402index falls back to keyword-only when its embedding service times out. Snap Router has neither hole.
• RyRank — a lexical+spectral hybrid reranker, not a cross-encoder: strong when the candidates already share vocabulary with the query, which is the common case for RAG retrieval output and tool/document shortlists. Built for high-volume, latency- and cost-sensitive reranking (narrowing a retrieval candidate set, deduping, triage) rather than close semantic disambiguation between near-identical phrasings — pay-per-call and about half the price is the trade for that.
• Pricing-Truth — every "token safety" tool checks the contract. None check whether the liquidity is real or the price is trustworthy. A pool can show $15M TVL and fill $4.

Install

pip install rgx-mcp
claude mcp add rgx --env RGX_API=https://rgx.tail817c3b.ts.net -- rgx-mcp

or with uvx (no install):

claude mcp add rgx --env RGX_API=https://rgx.tail817c3b.ts.net -- uvx rgx-mcp

Optional: RGX_XPAYMENT = a base64 x402 X-PAYMENT payload, to make paid calls past the free tier. Without it you get 25 free calls/day per IP.

Direct HTTP (no MCP)

# Snap Router
curl -sX POST https://rgx.tail817c3b.ts.net/v1/snap -H 'content-type: application/json' \
  -d '{"task":"check a base token for honeypot before trading","k":4}'

# RyRank
curl -sX POST https://rgx.tail817c3b.ts.net/v1/rerank -H 'content-type: application/json' \
  -d '{"query":"how do I reset my password","documents":["Go to Settings > Security and click Reset Password.","Our refund policy allows returns within 30 days."],"top_n":2}'

# Pre-trade report
curl -s https://rgx.tail817c3b.ts.net/v1/base/token/0x532f27101965dd16442E59d40670FaF5eBB142E4/report

Discovery: /.well-known/agent-card.json (A2A), /.well-known/x402, /.well-known/mcp.json, /llms.txt, /openapi.json.

License

MIT