CryptoTaxEdge MCP Server

US tax classification for on-chain transactions, as an MCP server. Submit transaction hashes and get back the canonical event category, the US tax treatment with cited authority, a calibrated confidence score, an explicit route-to-review flag on uncertain rows, and per-leg breakdowns with counterparty identification. 80+ chains, including Ethereum, the major L2s, and Solana.

This is a remote MCP server — nothing to install or run locally.

Endpoint: https://mcp.cryptotaxedge.com/ (streamable HTTP, JSON-RPC 2.0)
Auth: Authorization: Bearer YOUR_API_KEY — free self-serve Developer key (no card) at dashboard.cryptotaxedge.com under Settings → API Keys
Docs: dashboard.cryptotaxedge.com/api
Site: cryptotaxedge.com

What it returns

Every classification carries the reliability envelope:

Field	Meaning
`category`	Canonical event type (swap, liquidity_add, reward, bridge, ...)
`treatment`	Closed enum: `disposal`, `income`, `non_taxable`, `expense`, `needs_review`
`taxable`	`true`, `false`, or `null` — `null` always travels with `needs_review: true`
`confidence`	Routing signal: how strongly independent evidence agreed
`needs_review`	The honesty contract — uncertain rows are flagged, never guessed
`grey_area`	On contested treatments (LP, wrap, liquid staking): the position not taken
`assets`	Per-leg sent/received breakdown with counterparties

Plain transfers, approvals, spam, failed and unsupported transactions, and every repeat come back fully identified at no charge.

Try it

List the tools:

Terminal

curl -X POST https://mcp.cryptotaxedge.com/ \
  -H "Authorization: Bearer $CTE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'

Classify a batch (up to 100 per call):

Terminal

curl -X POST https://mcp.cryptotaxedge.com/ \
  -H "Authorization: Bearer $CTE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":2,"method":"tools/call","params":{"name":"classify_batch","arguments":{"transactions":[{"tx_id":"row_1","tx_hash":"0x...","chain":"ethereum"}]}}}'

The same engine is available over plain REST — see the API docs and the developer quickstart.

Registry manifest

server.json — published to the official MCP Registry as io.github.sturs49/cryptotaxedge.

Listed on Glama (glama.json).

License

MIT © 2026 Kevin Stursberg / CryptoTaxEdge. This repository is the public listing (docs, registry manifest, and a small catalog proxy). The classification engine is the remote server above, not this repo.

Glama / local container

Glama grades Tool Definition Quality from a container that starts and answers MCP initialize + tools/list. The image is a tiny Node proxy — it does not ship the engine. Catalog methods are forwarded to https://mcp.cryptotaxedge.com/.

Listen port: 8080 (override with PORT; binds 0.0.0.0)
Paths: POST / and POST /mcp (streamable HTTP / JSON-RPC)
Health: GET / or GET /health
No API key for initialize, tools/list, or ping
tools/call returns 401 unless CTE_API_KEY is set or the request already has Authorization: Bearer …

Terminal

docker build -t cryptotaxedge-mcp .
docker run --rm -p 8080:8080 cryptotaxedge-mcp

Terminal

curl -X POST http://localhost:8080/ \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2024-11-05","capabilities":{},"clientInfo":{"name":"local","version":"0"}}}'

curl -X POST http://localhost:8080/ \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","id":2,"method":"tools/list"}'

If Glama generates a Dockerfile and wraps CMD with mcp-proxy --, set the admin CMD arguments to ["node", "server.mjs", "--stdio"]. The same process also accepts stdio when started without --stdio.

Cite / provenance

The category vocabulary and treatment semantics this server returns are the CryptoTaxEdge Classification Standard: an open, versioned schema with worked examples and tax-position caveats, licensed CC BY 4.0. The standard and the 2026 H1 labelled benchmark corpus (388 public transaction hashes) are archived at DOI 10.5281/zenodo.21911546 and mirrored as a Hugging Face dataset: CryptoTaxEdge/crypto-tax-classification-2026h1.

Methodology and benchmark notes: cryptotaxedge.com/research
Verbatim request/response captures, replayed nightly against the live engine: sturs49/cryptotaxedge-examples

Classifications are informational only, not tax advice. Verify results with a qualified tax professional before filing.