ZenLedger
ZenLedger is a Seattle-founded crypto tax and digital-asset accounting company whose platform ingests transactions from 400+ exchanges, 100+ DeFi protocols and 10+ NFT marketplaces to calculate cost basis, capital gains and income, and generate US tax forms. Beyond the consumer product it operates two documented B2B REST APIs on api.zenledger.io: the Compliance Suite API (v3), a digital-asset trade-monitoring surface built with COMPLY for financial institutions and enterprise compliance teams that registers companies and users, imports wallets and exchange accounts, returns normalized transactions and holdings, and screens blockchain addresses against sanctions lists; and the Aggregator Suite API (v1), a partner surface that builds an aggregated portfolio from a set of accounts and returns the resulting tax calculation. Both authenticate with OAuth 2.0 client_credentials JWTs and are documented as versioned Postman collections at docs.zenledger.io.
ZenLedger publishes 13 API contracts indexed on the APIs.io network, including Authentication API, Companies API, Holdings API, and 10 more. Tagged areas include Crypto Tax, Digital Assets, Tax Compliance, Blockchain Analytics, and RegTech.
The ZenLedger catalog on APIs.io includes 1 event-driven AsyncAPI specification.
ZenLedger’s developer surface includes engineering blog, documentation, API reference, support, pricing, authentication, and 27 more developer resources.
What this lets a business do 2
Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →
Kin Score
Markets this provider is in provisional
The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.
| Market | Position | Depth | Registered MCP server | Declares compatibility |
|---|---|---|---|---|
| E-invoicing and Tax Compliance (certified operators) | undeclared | - | - | - |
Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.
APIs 13
Individual APIs this provider publishes, each with its own machine-readable definition.
ZenLedger Authentication API
OAuth 2.0 client_credentials token issuance.
ZenLedger Companies API
Enterprise tenants registered under the Compliance Suite account.
ZenLedger Holdings API
Per-source balances and import state for a user or company.
ZenLedger Imports API
Wallet and exchange-account import (signed and encrypted).
ZenLedger Polymarkets API
Polymarket prediction-market positions.
ZenLedger Portfolios API
Create an aggregated portfolio from a set of accounts.
ZenLedger Supported Chains API
Supported blockchain reference data.
ZenLedger Supported Currencies API
Currency reference data.
ZenLedger Supported Exchanges and Wallets API
Supported exchange/wallet source reference data.
ZenLedger Taxes API
Retrieve the tax calculation for an aggregated portfolio.
ZenLedger Transactions API
Normalized crypto transactions for a user or across a company.
ZenLedger Users API
End users tracked under a company.
ZenLedger Wallet Screening API
Sanctions and risk screening for a blockchain address.
Scroll for all 13
Postman Collections 2
Ready-to-run Postman collections for exercising this provider's APIs.
Pricing Plans 1
Published pricing tiers and plan structures.
Rate Limits 1
Documented rate limits and quota policies.
Zenledger Rate Limits
RATE LIMITSEvent Specifications 1
AsyncAPI definitions for this provider's event-driven and streaming APIs.
Zenledger Compliance Webhooks
ASYNCAPIOpenAPI Overlays 2
Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.
Zenledger Aggregator Api Overlay
GENERATEDZenledger Compliance Api Overlay
GENERATEDSecurity Posture 4
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Zenledger Trust Center
SOC 2 Type II, SOC 2 Framework alignment (Information Security Program)
SECURITYResources
Get Started 1
Portal, sign-up, and the first successful call
Documentation 2
Reference material describing how the API behaves
Agent Surfaces 3
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 5
Pagination, idempotency, versioning, errors, and events
Build 3
SDKs, sample code, and the tooling you integrate with
Access & Security 6
Authentication, authorization, and security posture
Operate 3
Status, limits, changes, and where to get help
Commercial 4
Pricing, plans, and the legal terms of use
Company 3
The organization behind the API
Other 3
Properties that don't map to a standard resource type
Source (apis.yml)
Work with this as data
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