TaxBit

TaxBit is an end-to-end tax compliance and information-reporting platform for the digital economy, serving enterprises and governments across 70+ jurisdictions and 140+ countries. Its API turns transaction data into accurate cost basis, realized gains (IRS Form 8949 / 1099-B), and regulatory filings, and handles tax-documentation collection (W-9, W-8BEN, W-8BEN-E, self-certification), US TIN validation, DAC7 digital-platform-seller reporting, and CARF/DAC8 crypto-asset reporting. The REST API (documented at apidocs.taxbit.com) authenticates with tenant-scoped and account-owner-scoped bearer tokens, and TaxBit ships embeddable React/browser SDKs for collecting tax documentation directly inside customer apps.

TaxBit publishes 1 API on the APIs.io network. Tagged areas include Company, Tax, Tax Compliance, Information Reporting, and Digital Assets.

The TaxBit catalog on APIs.io includes 1 event-driven AsyncAPI specification.

TaxBit’s developer surface includes documentation, API reference, getting-started guide, support, engineering blog, authentication, and 21 more developer resources.

🌐 Visit website 📡 Source on GitHub
40.1/100 thin ▬ flat Agent 40/100 agent aware Full breakdown ↓
scored 2026-07-27 · rubric v0.5
AccessSelf serve
1 APIs 1 MCP Servers
CompanyTaxTax ComplianceInformation ReportingDigital AssetsCryptocurrencyAccountingRegtech

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 40.1/100 · thin
Contract Quality 5.7 / 25
Developer Ergonomics 14.8 / 20
Commercial Clarity 7.4 / 20
Operational Transparency 3.1 / 13
Governance 0.0 / 12
Discoverability 9.3 / 10
Agent readiness — 40/100 · agent aware
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 15
MCP Server 12 / 12
Machine-Readable Auth 10 / 10
Idempotency 9 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 6 / 6
Agent Skills 5 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/taxbit: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

TaxBit API

REST API for tax compliance and information reporting: account owners, accounts, transactions, inventory, realized gains, tax documentation (W-8/W-9), filers, form items, dispos...

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

taxbit-mcp.yml

MCP SERVER

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Taxbit Webhooks

ASYNCAPI

Security Posture 3

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Taxbit Authentication

2 schemes

SECURITY

Taxbit Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Taxbit Trust Center

SOC 2, ISO 27001, GDPR

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal
DeveloperPortal
 GettingStarted
GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation
Documentation
 APIReference
APIReference

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt
LLMsTxt
 MCPServer
MCPServer
 AgentSkill
AgentSkill

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Conventions
Conventions
 Idempotency
Idempotency
 Conformance
Conformance
 Lifecycle
Lifecycle
 Components
Components
 DataModel
DataModel
 Webhooks
Webhooks

Scroll for all 7

Build 2

SDKs, sample code, and the tooling you integrate with

Packages
Packages
 SDKs
SDKs

Access & Security 4

Authentication, authorization, and security posture

TrustCenter
TrustCenter
 DomainSecurity
DomainSecurity
 Authentication
Authentication
 Compliance
Compliance

Operate 3

Status, limits, changes, and where to get help

Support
Support
 HelpCenter
HelpCenter
 StatusPage
StatusPage

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy

Company 2

The organization behind the API

Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: taxbit
name: TaxBit
description: TaxBit is an end-to-end tax compliance and information-reporting platform for the digital economy, serving enterprises
  and governments across 70+ jurisdictions and 140+ countries. Its API turns transaction data into accurate cost basis, realized
  gains (IRS Form 8949 / 1099-B), and regulatory filings, and handles tax-documentation collection (W-9, W-8BEN, W-8BEN-E,
  self-certification), US TIN validation, DAC7 digital-platform-seller reporting, and CARF/DAC8 crypto-asset reporting. The
  REST API (documented at apidocs.taxbit.com) authenticates with tenant-scoped and account-owner-scoped bearer tokens, and
  TaxBit ships embeddable React/browser SDKs for collecting tax documentation directly inside customer apps.
url: https://raw.githubusercontent.com/api-evangelist/taxbit/refs/heads/main/apis.yml
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://files.readme.io/e2c1133-small-taxbit-dark.png
x-type: company
x-source: vc-portfolio
x-backed-by:
- insight-partners
- ivp
- paradigm
- ribbit-capital
- sapphire-ventures
x-tier: profiled
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Tax
- Tax Compliance
- Information Reporting
- Digital Assets
- Cryptocurrency
- Accounting
- Regtech
apis:
- name: TaxBit API
  description: 'REST API for tax compliance and information reporting: account owners, accounts, transactions, inventory,
    realized gains, tax documentation (W-8/W-9), filers, form items, disposition methods, transfer lots, US TIN validation
    and tax treaty rates. Bearer-token authenticated; hosts are environment-specific under api.<environment>.enterprise.taxbit.com.'
  humanURL: https://apidocs.taxbit.com/docs/getting-started
  baseURL: https://api.multi1.enterprise.taxbit.com
  tags:
  - Tax
  - Information Reporting
  - Digital Assets
  properties:
  - type: Documentation
    url: https://apidocs.taxbit.com/docs/getting-started
  - type: APIReference
    url: https://apidocs.taxbit.com/reference
  - type: Authentication
    url: authentication/taxbit-authentication.yml
  - type: Conventions
    url: conventions/taxbit-conventions.yml
  - type: DataModel
    url: data-model/taxbit-data-model.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://taxbit.com/
- type: DeveloperPortal
  url: https://apidocs.taxbit.com/docs/getting-started
- type: Documentation
  url: https://apidocs.taxbit.com/docs/getting-started
- type: APIReference
  url: https://apidocs.taxbit.com/reference
- type: GettingStarted
  url: https://apidocs.taxbit.com/docs/getting-started
- type: Support
  url: https://taxbitsupport.zendesk.com/
- type: HelpCenter
  url: https://www.taxbit.com/support
- type: Blog
  url: https://www.taxbit.com/blogs
- type: StatusPage
  url: https://status.taxbit.com/
- type: TermsOfService
  url: https://www.taxbit.com/terms-of-service
- type: PrivacyPolicy
  url: https://www.taxbit.com/privacy-policy
- type: TrustCenter
  url: security/taxbit-trust-center.yml
- type: DomainSecurity
  url: security/taxbit-domain-security.yml
- type: LLMsTxt
  url: llms/taxbit-llms.txt
- type: MCPServer
  url: mcp/taxbit-mcp.yml
- type: Authentication
  url: authentication/taxbit-authentication.yml
- type: Conventions
  url: conventions/taxbit-conventions.yml
- type: Idempotency
  url: conventions/taxbit-conventions.yml
- type: Conformance
  url: conformance/taxbit-conformance.yml
- type: Compliance
  url: conformance/taxbit-conformance.yml
- type: Lifecycle
  url: lifecycle/taxbit-lifecycle.yml
- type: Packages
  url: packages/taxbit-packages.yml
- type: SDKs
  url: packages/taxbit-packages.yml
- type: Components
  url: components/taxbit-components.yml
- type: DataModel
  url: data-model/taxbit-data-model.yml
- type: Webhooks
  url: asyncapi/taxbit-webhooks.yml
- type: AgentSkill
  url: skills/_index.yml
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 13
  pass: local-v1