Hive Tax Observer

srotzin/hive-mcp-tax-observer MCP server

Observational tax-event tracking for crypto transactions. Real on-chain rails. Not tax advice. Not tax filing.

Hive does not provide tax advice or filing services. This is observational transaction data only. Consult a licensed tax professional for compliance decisions.

hive-mcp-tax-observer is a Model Context Protocol (MCP) server that classifies a settled on-chain transaction into one of four observational kinds — sale, swap, income, or transfer — and surfaces the cost-basis-relevant inputs (holder, asset, amount, counterparty, timestamp) your own basis tracker needs. Real reads against Base mainnet, Ethereum mainnet, and Solana mainnet via public RPC.

We do not compute cost basis. We do not file taxes. We do not generate 1099s or any tax forms. Every response — including health, errors, and bulk responses — carries the observational disclaimer.

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What this is

• Protocol: MCP 2024-11-05 over Streamable-HTTP / JSON-RPC 2.0
• Transport: POST /mcp
• Discovery: GET /.well-known/mcp.json
• Health: GET /health (200, brand_color, disclaimer, enabled, supported_chains)
• Backend: https://hivemorph.onrender.com — /v1/tax/*
• Brand: Hive Civilization gold #C08D23 (Pantone 1245 C)

Tools

Tool	Description
tax.classify	Classify a single tx_hash + chain as sale, swap, income, or transfer. Returns the cost-basis-relevant inputs and the disclaimer.
tax.bulk	Classify an array of tx hashes (max 50) in a single call. Returns per-tx results plus a by-kind summary.
tax.today	24-hour rollup of classified events by kind, with a taxable-signal subtotal. Free.

Backend endpoints

Method	Path	Purpose
POST	/v1/tax/event	Single tx classification
POST	/v1/tax/bulk	Bulk tx classification (max 50)
GET	/v1/tax/today	24h rollup
GET	/v1/tax/health	Service liveness

Classification model

Every classification is observational and derived from on-chain data alone:

Kind	Signal
sale	Sender sent assets out with no offsetting inflow (likely disposition).
swap	Sender both sent and received assets in the same tx (DEX-style).
income	Sender received assets with no offsetting outflow.
transfer	Same beneficial owner, no taxable inflow or outflow detected from this address.

A taxable_signal: true flag is set when the kind is one of sale, swap, or income. This is not a tax determination. It is a heuristic signal derived from the agent-supplied tx hash.

Run locally

git clone https://github.com/srotzin/hive-mcp-tax-observer.git
cd hive-mcp-tax-observer
npm install
npm start
# server up on http://localhost:3000/mcp
curl http://localhost:3000/health
curl http://localhost:3000/.well-known/mcp.json

Connect from an MCP client

Claude Desktop / Cursor / Manus — add to your mcp.json:

{
  "mcpServers": {
    "tax_observer": {
      "command": "npx",
      "args": ["-y", "mcp-remote@latest", "https://hive-mcp-tax-observer.onrender.com/mcp"]
    }
  }
}

Quickstart

# Classify a single Base transaction
curl -sX POST https://hive-mcp-tax-observer.onrender.com/v1/tax/event \
  -H 'content-type: application/json' \
  -d '{"tx_hash":"0x...","chain":"base"}' | jq

# 24h rollup (free)
curl -s https://hive-mcp-tax-observer.onrender.com/v1/tax/today | jq

# Bulk
curl -sX POST https://hive-mcp-tax-observer.onrender.com/v1/tax/bulk \
  -H 'content-type: application/json' \
  -d '{"chain":"base","tx_hashes":["0x...","0x..."]}' | jq

What we do NOT do

• We do not compute cost basis. We surface the inputs your basis tracker needs.
• We do not file taxes, generate 1099s, or produce tax forms.
• We do not make compliance determinations.
• We do not provide tax advice. Consult a licensed tax professional.

Hive Civilization

Part of the Hive Civilization — sovereign DID, USDC settlement, agent-to-agent rails.

Categories: finance, tax, compliance, web3, agent-to-agent, observability.

License

MIT (c) Steve Rotzin / Hive Civilization

Hive Civilization Directory

Part of the Hive Civilization — agent-native financial infrastructure.

• Endpoint Directory: https://thehiveryiq.com
• Live Leaderboard: https://hive-a2amev.onrender.com/leaderboard
• Revenue Dashboard: https://hivemine-dashboard.onrender.com
• Other MCP Servers: https://github.com/srotzin?tab=repositories&q=hive-mcp

Brand: #C08D23