“A cross-chain bridge is not a sale, but plenty of tools tag it like one and inflate the client’s gains. CryptoTaxEdge reads what actually moved and calls the bridge a non-taxable transfer, with a confidence score, so I’m confirming its read instead of untangling the transaction by hand.”
The classification API for crypto accountants, CPA firms, and tax platforms.Classification API for crypto accountants
Crypto tax classification you can file on.
Deterministic rules, not a coin flip. An honest needs-review flag instead of a confident guess. And verifiable evidence behind every corroborated US tax treatment, replayed against the live engine nightly. The difference between an AI answer and a professional work product.
Measured: ask a frontier AI to classify the same complex DeFi transaction twice and the answer changes 17.4% of the time, vs 2.1% on simple transfers. Our engine escalates the hard ones for review instead of guessing. See the methodology.
Or try:
Free developer tier · No credit card required
15,000+ rules
Verified tax treatments
2.5M+ contracts
Decoded + labeled
70+ protocols
With verified rules
How it works
Inside the classification engine.
Detect the chain, parse through 15,000+ verified rules across 70+ protocols, cross-check independent sources. Every transaction lands in your ledger with a confidence score, never a silent guess.
01
Enter hash
Enter a transaction hash. Any chain, any protocol. We take it from there.
02
Find chain
We auto-detect the network and decode the function call, across 80+ chains.
03
Match the rule library
Match the protocol against our curated rules library: 15,000+ verified rules across 70+ protocols.
04
Compare sources
Multiple independent providers run in parallel. Our AI engine resolves conflicts.
05
Classified row
Out comes a classified, confidence-scored row, ready to export.
What we build
One classification engine.
Every way you work.
Integrate the API, or use the same engine in your browser, your accounting tool, or your AI agent. Built for platforms, accountants, and traders. No surprise billing: firm plans never meter, and API overage is one published rate.
REST API
Classification API
Call the engine directly. Send one hash or a batch, get back category, tax treatment, and a confidence score, the same classifications behind every surface here. Built for subledgers, tax platforms, and accounting tools.
- REST endpoint + batch · webhooks
- Category, tax treatment & confidence score
- 80+ chains, 15,000+ rules across 70+ protocols
- Volume-based pricing for platforms
For AI Agents
CryptoTaxEdge for AI agents MCP
Plug any MCP-compatible client into the same classification engine behind the API. Included with every API key · usage counts toward your plan's pool.
- Same consensus engine as the API
- Drop-in tools for any MCP client
- No setup: point and classify
- Free preview, no credit card
Web App · Live
Classification Explorer
No code? Enter hundreds of transaction hashes in the browser. Every result is classified, confidence-scored, and export-ready in minutes. Independent data pipelines cross-check each transaction and our AI flags conflicts automatically.
- Upload a CSV of transaction hashes, hundreds in one pass
- Multi-source verified + AI conflict detection
- 80+ chains, 15,000+ rules across 70+ protocols
- 10/day free (no signup) · 250 billable/mo signed-in
Chrome Extension
Live TX Classifier
Classifies transactions in real-time while you work in Koinly or any crypto accounting tool. See exactly what happened on-chain (swap, bridge, stake, claim) without leaving your workflow.
- Works inside Koinly and other accounting tools
- AI classification with accounting flags
- Labels inline, no context switching
- Confidence-scored on every classification
Coverage
Supported chains
Ethereum
Base
Polygon
Arbitrum
Optimism
BSC
Solana
Avalanche
zkSync
Linea
Scroll
Blast
Fantom
Gnosis
Celo
Mantle
Polygon zkEVM
Mode
Manta
Cronos
Moonbeam
Moonriver
Sonic
Metis
Ronin
Lisk
Fuse
Astar
Flow
PulseChain
Fraxtal
Taiko
Aurora
Arb Nova
Hyperliquid
80+ chains supported · Auto-detected from any transaction hash
In practice
How CPAs describe the workflow shift.
“Crypto engagements used to mean a couple days per client just to reconcile activity across chains. CryptoTaxEdge helps us through that same work in an afternoon. Across a full client book, that kind of time savings compounds fast.”
Pricing
Start on the API.
Scale when you ship.
You pay only for tax classifications; identification is always free. Firms: $199/month, 2 seats and 20,000 billable transactions pooled. Developers and platforms: free to start, $249/month for 25,000, $999 for 120,000.
For developers and platforms
Build classification into your own app, by API or MCP. Tax classification, confidence, reasoning, and grey-area position on every transaction.
Developer
$0
free forever
For building and evaluation.
- ✓250 billable transactions a month
- ✓API and MCP server
- ✓All 80+ chains, 15,000+ verified rules
For production apps
Pro
$249
per month
Production API volume.
- ✓25,000 billable transactions a month, then $0.012 each
- ✓Batch endpoint and webhooks
- ✓Priority classification
Platform
$999
per month
The machine-volume plan.
- ✓120,000 billable transactions a month, then $0.012 each
- ✓Priority support, top API rate limits
- ✓Everything in Pro
Enterprise
Contact
250,000+ committed; rates below a penny
Partner and embed integrations.
- ✓Custom volume
- ✓Embed and partner rail
- ✓Dedicated support
Billable includes review-flagged triage. Plain transfers, approvals, spam, failed rows, unsupported rows, and repeats are always free.
Between plans, overage covers you: 40,000 a month on Pro runs about $429; Platform becomes the better deal past roughly 87,000. API plans cover your own product and workflows, free products, internal use, and betas included - charging end users for CryptoTaxEdge-powered output is a partner agreement.
For accounting firms & bookkeeping teams
No automatic overages
Firm
$199
per month · 2 seats and 20,000 billable transactions pooled · $50 per added seat, each +5,000
The in-app toolkit for firms handling crypto client work. Fair use is measured on your year, not the calendar month, so tax season just works.
- ✓Classification Explorer for every seat
- ✓Chrome extension for the tax platforms you already use
- ✓Downloadable classification exports
Last call: the $99 founder rate closes to new signups September 3, 2026. Existing founder accounts keep it for life. Lock in $99 before it closes.
The Classification Explorer and Chrome extension stay free to try for everyone, no account needed.
Questions
Good to know.
What counts as a billable classification?
You pay only for tax classifications; identification is always free. One transaction hash counts once, when it receives a tax classification for a billable event type: swaps, liquidity, lending, rewards, NFTs, payments, and rows flagged for professional review (that triage is delivered work). Plain transfers come back with the counterparty named when identifiable; those transfers, approvals, spam, failed rows, and every repeat are free and never count. The full billing definitions live in our terms.
Can't I just ask ChatGPT or Claude?
Honest answer: a single-run accuracy comparison cannot separate the systems, because measured run-to-run flips on identical input (2.1% to 17.4% depending on complexity) are wider than the gaps such a table shows; we retired ours from this site in both directions. What the measurements do show: ask twice and the answer changes on 17.4% of complex DeFi transactions, models disagree with each other on 44.5% of exotic rows, and a raw hash alone is refused 1,164 times out of 1,164. We escalate hard transactions for review instead of guessing. See the methodology for the full numbers.
How is CryptoTaxEdge different from a portfolio tracker or tax calculator?
CryptoTaxEdge is the classification layer: an API and tools that determine the US tax treatment of individual transactions, with evidence behind each result. It is not a portfolio reporting product; trackers and calculators can build on it. Firms use it to resolve the transactions those tools can't classify.
More questions are answered in depth on the answer pages.