Harness Wealth website screenshot

Harness Wealth

Harness — the company that launched as Harness Wealth, and today a wholly owned business of Multiplier, Inc. — is a New York City firm that runs an advisory platform for tax and wealth practices. It operates three connected surfaces: a marketplace that matches individuals with complex financial situations (equity compensation, liquidity events, business owners, real estate, high net worth) to vetted tax advisors; a client portal and workflow platform that tax firms run their engagements, documents, questionnaires and e-file on; and Harness Wealth Advisers, LLC, an SEC-registered investment adviser that recommends third-party advisers. Harness publishes no public developer program — there is no developer portal, API reference, OpenAPI/GraphQL/AsyncAPI specification, SDK, CLI or webhook documentation on any Harness host, and the product is delivered entirely as an end-user web application at app.harness.co.

Harness Wealth is profiled on the APIs.io network. Tagged areas include Company, Financial-Services, Tax, Wealth Management, and Accounting.

Harness Wealth’s developer surface includes engineering blog, support, and 13 more developer resources.

13.7/100 emerging ▬ flat Agent 0/100 human only saas Full breakdown ↓
scored 2026-09-14 · rubric v0.22.0
0 APIs
CompanyFinancial-ServicesTaxWealth ManagementAccountingInvestment AdvisoryMarketplaceProfessional ServicesFintech

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-14 · rubric v0.22.0
Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/harness-wealth: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Security Posture 1

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

Harness Wealth Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

Build 1

SDKs, sample code, and the tooling you integrate with

Access & Security 2

Authentication, authorization, and security posture

Operate 2

Status, limits, changes, and where to get help

Commercial 2

Pricing, plans, and the legal terms of use

Company 5

The organization behind the API

Other 1

Properties that don't map to a standard resource type

Source (apis.yml)

apis.yml Raw ↑
aid: harness-wealth
name: Harness Wealth
description: 'Harness — the company that launched as Harness Wealth, and today a wholly owned business of Multiplier, Inc.
  — is a New York City firm that runs an advisory platform for tax and wealth practices. It operates three connected surfaces:
  a marketplace that matches individuals with complex financial situations (equity compensation, liquidity events, business
  owners, real estate, high net worth) to vetted tax advisors; a client portal and workflow platform that tax firms run their
  engagements, documents, questionnaires and e-file on; and Harness Wealth Advisers, LLC, an SEC-registered investment adviser
  that recommends third-party advisers. Harness publishes no public developer program — there is no developer portal, API
  reference, OpenAPI/GraphQL/AsyncAPI specification, SDK, CLI or webhook documentation on any Harness host, and the product
  is delivered entirely as an end-user web application at app.harness.co.'
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - security
  generated: '2026-09-02'
  method: derived
image: https://www.harness.co/assets/logo.svg
url: https://raw.githubusercontent.com/api-evangelist/harness-wealth/refs/heads/main/apis.yml
x-type: company
x-source: harvest:secondary-market
specificationVersion: '0.23'
created: '2026-08-22'
modified: '2026-08-22'
tags:
- Company
- Financial-Services
- Tax
- Wealth Management
- Accounting
- Investment Advisory
- Marketplace
- Professional Services
- Fintech
tags_raw:
- Company
- Financial Services
- Tax
- Wealth Management
- Accounting
- Investment Advisory
- Marketplace
- Professional Services
- Fintech
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/harness-wealth-domain-security.yml
- type: Website
  url: https://www.harness.co/
- type: About
  url: https://www.harness.co/about
- type: Blog
  url: https://www.harness.co/articles
- type: Support
  url: https://help.harness.co/
- type: Roadmap
  url: https://harness.canny.io/
- type: Login
  url: https://app.harness.co/app/
- type: GitHubOrganization
  url: https://github.com/harness-wealth
- type: TermsOfService
  url: https://www.harness.co/terms-of-service
- type: PrivacyPolicy
  url: https://www.harness.co/privacy-policy
- type: Disclosures
  url: https://www.harness.co/regulatory-disclosures
- type: Press
  url: https://www.harness.co/press
- type: LinkedIn
  url: https://linkedin.com/company/harnesswealth
- type: SecondaryMarket
  url: https://equityzen.com/company/harnesswealth/
- type: LLMsTxt
  url: llms/harness-wealth-llms.txt
x-identity:
  fetched: '2026-08-22'
  legal_entities:
  - Harness Tax LLC
  - Harness Wealth Advisers, LLC
  parent_company: Multiplier, Inc.
  headquarters: 205 Hudson St, 7th Floor, New York, NY 10013
  domains:
  - harness.co
  - harnesswealth.com
  note: harnesswealth.com 301s to https://www.harness.co/ (probed 2026-08-22, HTTP 200 at the redirect target). The harvest
    backlog recorded the secondary-market venue homepage (https://www.nasdaqprivatemarket.com/) as this company's Website;
    that pointer was wrong and has been replaced with the company's own site, with the venue recorded as SecondaryMarket against
    the EquityZen listing that names Harness Wealth directly.
x-enrichment:
  date: '2026-08-22'
  status: minimal
  artifacts_added: 4
  pass: local-v1
x-coverage:
  state: none
  reason: no-developer-program
  detail: Harness ships its tax-advisory platform only as an end-user web application at app.harness.co — api.harness.co,
    docs.harness.co and developer.harness.co do not resolve in DNS, the marketing site returns a hard 404 for /llms.txt, /openapi.json
    and every /.well-known/ path, and the only host that answers a spec probe is the client SPA, which returns the same 18,352-byte
    HTML shell for every unmatched path.
  evidence:
  - url: https://www.harness.co/openapi.json
    status: 404
  - url: https://www.harness.co/llms.txt
    status: 404
  - url: https://www.harness.co/.well-known/agent-card.json
    status: 404
  - url: https://app.harness.co/openapi.json
    status: 200
  - url: https://app.harness.co/.well-known/agent-card.json
    status: 404
  - url: https://harnesswealth.com/
    status: 200
  checked: '2026-08-22'

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