Windfall Data

Windfall (windfall.com, formerly windfalldata.com) is a people-intelligence and AI platform that personalizes go-to-market workflows with wealth and career data. Its developer-facing Windfall API delivers enriched household and career data on a single-record basis in real time: submit a person record with basic PII and receive that individual's household net worth, a stable Windfall ID, and career signals such as a LinkedIn URL and title, returned as JSON in one sub-second request. Coverage is United States, data is refreshed weekly, and the API is used for real-time lead routing and grading, marketing enrichment, and analytics scoring. Authentication is a Windfall-issued header token with a dedicated sandbox environment of deterministic test personas. Windfall is SOC 2 Type 2 certified.

Windfall Data publishes 1 API on the APIs.io network: Windfall API. Tagged areas include Company, Data, Data Enrichment, Wealth Data, and People Intelligence.

Windfall Data’s developer surface includes documentation, API reference, getting-started guide, authentication, sandbox, code examples, support, and 23 more developer resources.

🌐 Visit website 📡 Source on GitHub

49.4/100 developing ▬ flat Agent 32/100 agent ready Front door AI 5/6 prominent saas Full breakdown ↓
scored 2026-09-25 · rubric v0.23.0

1 APIs

Company Data Data EnrichmentWealth DataPeople IntelligenceNet WorthIdentity Resolution Marketing Sales

Kin Score

Kin Score How this is scored →
scored 2026-09-25 · rubric v0.23.0

Composite quality — 49.4/100 · developing

Contract Quality 10.1 / 19

Developer Ergonomics 9.9 / 15

Access Clarity 6.5 / 15

Operational Transparency 2.3 / 10

Contract Governance 1.6 / 9

Discoverability 5.5 / 8

Regulatory Posture 4.4 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 32/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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/windfall-data: 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 →

APIs 1

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

Windfall Data Windfall API

The Windfall API API from Windfall Data — 1 operation(s) for windfall api.

Open Collections 2

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Windfall Windfall API API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Windfall Data Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Windfall Data Rate Limits

1 limits

RATE LIMITS

Security Posture 3

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

Windfall Data Authentication

apiKey · 1 scheme

SECURITY

Windfall Data Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Windfall Data Trust Center

SOC 2 Type 2

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Windfall Data Agentic Access

1 operation · 1 acting

1 operations · 1 acting

AGENTIC

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Sandbox

Sandbox

Login

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

X-MCPServerCandidate

AgentSkill

AgenticAccess

LLMsTxt

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

DataModel

Lifecycle

Conformance

Build 2

SDKs, sample code, and the tooling you integrate with

Examples

Examples

GitHubOrganization

GitHubOrganization

Access & Security 4

Authentication, authorization, and security posture

Authentication

Compliance

TrustCenter

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

RateLimits

RateLimits

Support

Support

Commercial 3

Pricing, plans, and the legal terms of use

Plans

Plans

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 3

The organization behind the API

Website

Website

Blog

Blog

BlogRSS

BlogRSS

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: windfall-data
name: Windfall Data
description: 'Windfall (windfall.com, formerly windfalldata.com) is a people-intelligence and AI platform that personalizes
  go-to-market workflows with wealth and career data. Its developer-facing Windfall API delivers enriched household and career
  data on a single-record basis in real time: submit a person record with basic PII and receive that individual''s household
  net worth, a stable Windfall ID, and career signals such as a LinkedIn URL and title, returned as JSON in one sub-second
  request. Coverage is United States, data is refreshed weekly, and the API is used for real-time lead routing and grading,
  marketing enrichment, and analytics scoring. Authentication is a Windfall-issued header token with a dedicated sandbox environment
  of deterministic test personas. Windfall is SOC 2 Type 2 certified.'
url: https://raw.githubusercontent.com/api-evangelist/windfall-data/refs/heads/main/apis.yml
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - rate-limits
  - security
  - sandbox
  generated: '2026-09-03'
  method: derived
image: https://api-docs.windfall.com/logo.svg
x-type: company
x-source: vc-portfolio
x-backed-by:
- bullpen-capital
x-tier: profiled
x-tier-reason: enriched-real-api
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-09-16'
tags:
- Company
- Data
- Data Enrichment
- Wealth Data
- People Intelligence
- Net Worth
- Identity Resolution
- Marketing
- Sales
apis:
- aid: windfall-data:windfall-data-windfall-api-api
  name: Windfall Data Windfall API
  description: The Windfall API API from Windfall Data — 1 operation(s) for windfall api.
  humanURL: https://api-docs.windfall.com/
  baseURL: https://api.windfalldata.com/v1
  tags:
  - Windfall API
  properties:
  - type: OpenAPI
    url: openapi/windfall-data-windfall-api-api-openapi.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Overlay
  url: overlays/windfall-data-openapi-overlay.yaml
- type: Website
  url: https://windfall.com
- type: DeveloperPortal
  url: https://api-docs.windfall.com/
- type: Documentation
  url: https://api-docs.windfall.com/
- type: APIReference
  url: https://api-docs.windfall.com/
- type: GettingStarted
  url: https://api-docs.windfall.com/quickstart/
- type: Authentication
  url: authentication/windfall-data-authentication.yml
- type: Sandbox
  url: sandbox/windfall-data-sandbox.yml
- type: X-MCPServerCandidate
  url: mcp/windfall-data-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: AgentSkill
  url: skills/_index.yml
- type: AgenticAccess
  url: agentic-access/windfall-data-agentic-access.yml
- type: Conventions
  url: conventions/windfall-data-conventions.yml
- type: ErrorCatalog
  url: errors/windfall-data-problem-types.yml
- type: DataModel
  url: data-model/windfall-data-data-model.yml
- type: Lifecycle
  url: lifecycle/windfall-data-lifecycle.yml
- type: Conformance
  url: conformance/windfall-data-conformance.yml
- type: Compliance
  url: https://www.windfall.com/security
- type: TrustCenter
  url: security/windfall-data-trust-center.yml
- type: DomainSecurity
  url: security/windfall-data-domain-security.yml
- type: RateLimits
  url: rate-limits/windfall-data-rate-limits.yml
- type: Plans
  url: plans/windfall-data-plans-pricing.yml
- type: Examples
  url: examples/windfall-data-examples.yml
- type: LLMsTxt
  url: llms/windfall-data-llms.txt
- type: GitHubOrganization
  url: https://github.com/windfalldata
- type: Support
  url: https://www.windfall.com/contact
- type: Blog
  url: https://www.windfall.com/blog
- type: BlogRSS
  url: https://www.windfall.com/blog/rss.xml
- type: Login
  url: https://login.windfalldata.com/login
- type: TermsOfService
  url: https://www.windfall.com/terms-of-service
- type: PrivacyPolicy
  url: https://www.windfall.com/privacy
x-enrichment:
  date: '2026-08-13'
  status: enriched
  artifacts_added: 5
  pass: local-v1
x-parent: windfall
x-relationship: product

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