Hive Tax Observer
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.
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