Windfall

Windfall is an AI-powered people intelligence platform that helps go-to-market teams personalize workflows with wealth and career data, serving 1,500+ organizations across finance, retail, education, healthcare, and nonprofits. The Windfall API delivers enriched household and career data for a single person record in real time — submit basic PII and receive JSON in one HTTPS request. One operation (enrichRecord) returns up to 32 documented household fields (net worth and its confidence bounds, property, life events, philanthropy, political giving, financial signals) and 26 career fields (job title and level, job-change signals, employer firmographics, LinkedIn URL), with availability set by the customer's plan. US coverage only; the database is rebuilt weekly; rate limited to 5 requests/second; and a non-billed sandbox with 15 deterministic fictitious personas and a header-driven error simulator mirrors production for integration testing. Access is contractual — tokens are issued by Windfall and API credits were bundled into existing subscriptions when the API opened to all customers and partners in May 2026.

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

The Windfall catalog on APIs.io includes 1 Spectral governance ruleset.

Windfall’s developer surface includes documentation, API reference, getting-started guide, engineering blog, support, authentication, sandbox, and 28 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

51.8/100 developing ▬ flat Agent 32/100 agent ready Front door AI 5/6 prominent Heartbeat 47/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 published contract 2 Agent Skills

Company Fintech Data EnrichmentWealth DataPeople IntelligenceCareer DataIdentity Resolution Sales Intelligence Marketing DataNet WorthSales

What this lets a business do 1

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Data & Reference Information Services

AE-230

Windfall API

POST /

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 51.8/100 · developing

Contract Quality 10.6 / 19

Developer Ergonomics 9.9 / 15

Access Clarity 6.5 / 15

Operational Transparency 2.3 / 10

Contract Governance 2.9 / 9

Discoverability 5.6 / 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

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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/.

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks

6 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Access Clarity scores 43.4 — up to +11.3 composite points
Contract Quality scores 56.5 — up to +10.9 composite points
Operational Transparency scores 23.7 — up to +9.9 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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 the provider profile at artifacts.apis.io/windfall/apis.yml: open an issue on github.com/api-evangelist/windfall to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

OpenAPI

measured — observed by APIs.io (published)

APIs 1

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

Windfall API

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

Open Collections 1

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

Windfall Windfall API API

OPEN COLLECTION

Agent Skills 2

Packaged agent skills for driving this provider's APIs from an AI assistant.

Enrich a person record with Windfall

AGENT SKILL

Test a Windfall integration against the sandbox

AGENT SKILL

Windfall API pricing

Pricing Plans 1

Published pricing tiers and plan structures.

Windfall Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Windfall Rate Limits

1 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Windfall Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Windfall API Rules

45 rules · 43 errors 1 warnings 1 info

SPECTRAL

OpenAPI Overlays 1

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.

Windfall Openapi Overlay

7 actions · update · windfall-openapi-original.json

DERIVED

Security Posture 3

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

Windfall Authentication

apiKey · 1 scheme

SECURITY

Windfall Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Windfall Trust Center

SOC 2 Type 2, CCPA / California registered data broker

SECURITY

Agentic Access 1

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

Windfall 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

Login

Sandbox

Sandbox

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

X-MCPServerCandidate

AgentSkill

AgentSkill

LLMsTxt

AgenticAccess

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

Conformance

Conformance

Conventions

Conventions

Lifecycle

Lifecycle

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

CodeExamples

CodeExamples

Access & Security 4

Authentication, authorization, and security posture

Compliance

TrustCenter

Authentication

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Support

Support

RateLimits

RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Plans

Plans

Company 7

The organization behind the API

BlogRSS

Website

Blog

News

LinkedIn

Twitter

Twitter

Website

Website

Scroll for all 7

Other 2

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Overlay

Overlay

Source (apis.yml)

aid: windfall
name: Windfall
description: Windfall is an AI-powered people intelligence platform that helps go-to-market teams personalize workflows with
  wealth and career data, serving 1,500+ organizations across finance, retail, education, healthcare, and nonprofits. The
  Windfall API delivers enriched household and career data for a single person record in real time — submit basic PII and
  receive JSON in one HTTPS request. One operation (enrichRecord) returns up to 32 documented household fields (net worth
  and its confidence bounds, property, life events, philanthropy, political giving, financial signals) and 26 career fields
  (job title and level, job-change signals, employer firmographics, LinkedIn URL), with availability set by the customer's
  plan. US coverage only; the database is rebuilt weekly; rate limited to 5 requests/second; and a non-billed sandbox with
  15 deterministic fictitious personas and a header-driven error simulator mirrors production for integration testing. Access
  is contractual — tokens are issued by Windfall and API credits were bundled into existing subscriptions when the API opened
  to all customers and partners in May 2026.
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: contact-sales
  onboarding: sales
  trial: false
  try_now: false
  public: false
  label: Contact sales — tokens issued by Windfall
  confidence: high
  source:
  - https://api-docs.windfall.com/authentication/
  - https://www.windfall.com/blog/powering-real-time-ai-native-workflows-opening-the-windfall-api-to-all-customers-and-partners
  - plans/windfall-plans-pricing.yml
  note: 'Corrected 2026-08-14. The prior pass recorded "self-serve signup", which the provider''s own documentation contradicts:
    tokens are issued by Windfall and tied to an organization account, quota and refresh cadence are set "per your purchase
    order", sandbox tokens are provisioned by an account representative, and API credits are bundled into an existing platform
    subscription. There is no sign-up form and no checkout — the docs are public, the credentials are not.'
  generated: '2026-08-14'
  method: searched
image: https://api-docs.windfall.com/static/favicon.png
url: https://raw.githubusercontent.com/api-evangelist/windfall/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- homebrew
x-tier: enriched
x-tier-reason: Entered as a portfolio lead, but Windfall publishes a real, parsing OpenAPI 3.1 description on its own docs
  host plus a nine-page reference (authentication, quickstart, endpoint, 32 household fields, 26 career fields, sandbox with
  an error simulator, examples, use cases). Two enrichment passes have been run against it.
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-10-06'
tags:
- Company
- Fintech
- Data Enrichment
- Wealth Data
- People Intelligence
- Career Data
- Identity Resolution
- Sales Intelligence
- Marketing
- Data
- Net Worth
- Sales
apis:
- aid: windfall:windfall-windfall-api-api
  name: Windfall API
  description: The Windfall API API from Windfall — 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-windfall-api-api-openapi.yml
  - type: ErrorCatalog
    url: errors/windfall-problem-types.yml
  - type: DataModel
    url: data-model/windfall-data-model.yml
  - type: Overlay
    url: overlays/windfall-openapi-overlay.yaml
  - type: Documentation
    url: https://api-docs.windfall.com/
  - type: APIReference
    url: https://api-docs.windfall.com/enrich/
  - type: GettingStarted
    url: https://api-docs.windfall.com/quickstart/
  - type: Authentication
    url: https://api-docs.windfall.com/authentication/
  - type: Sandbox
    url: https://api-docs.windfall.com/sandbox/
  - type: CodeExamples
    url: https://api-docs.windfall.com/examples/
  - type: UseCases
    url: https://api-docs.windfall.com/business-use-cases/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: CapabilityMap
  url: capabilities/windfall-capability-edges.yml
  name: Windfall Business Capability Map
- url: https://www.windfall.com/blog/rss.xml
  type: BlogRSS
- type: Overlay
  url: overlays/windfall-openapi-overlay.yaml
- type: Website
  url: https://www.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: Blog
  url: https://www.windfall.com/blog
- type: Support
  url: https://www.windfall.com/contact
- 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
- type: GitHubOrganization
  url: https://github.com/windfalldata
- type: Compliance
  url: https://www.windfall.com/security
- type: TrustCenter
  url: security/windfall-trust-center.yml
- type: Conformance
  url: conformance/windfall-conformance.yml
- type: Authentication
  url: authentication/windfall-authentication.yml
- type: Conventions
  url: conventions/windfall-conventions.yml
- type: Lifecycle
  url: lifecycle/windfall-lifecycle.yml
- type: RateLimits
  url: rate-limits/windfall-rate-limits.yml
- type: Sandbox
  url: sandbox/windfall-sandbox.yml
- type: X-MCPServerCandidate
  url: mcp/windfall-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/windfall-enrich-person-record.md
- type: AgentSkill
  url: skills/windfall-sandbox-integration-test.md
- type: LLMsTxt
  url: llms/windfall-llms.txt
- type: AgenticAccess
  url: agentic-access/windfall-agentic-access.yml
- type: DomainSecurity
  url: security/windfall-domain-security.yml
- type: Packages
  url: packages/windfall-packages.yml
- type: Plans
  url: plans/windfall-plans-pricing.yml
- type: UseCases
  url: https://api-docs.windfall.com/business-use-cases/
- type: CodeExamples
  url: https://api-docs.windfall.com/examples/
- type: News
  url: https://www.windfall.com/company/news
- type: Integrations
  url: https://www.windfall.com/partners
- type: LinkedIn
  url: https://www.linkedin.com/company/windfall-data/
- type: Twitter
  url: https://twitter.com/windfalldata
- type: Website
  url: https://windfall.com
x-pointers-deliberately-absent:
  note: Recorded so a later round does not re-open these. Each was probed on 2026-08-14 and is genuinely not published by
    Windfall; wiring the pointer would assert a surface the provider does not serve.
  absent:
  - type: SDKs
    reason: No first-party client library in any registry — packages/windfall-packages.yml, package_count 0.
  - type: Idempotency
    reason: No Idempotency-Key header or equivalent is documented — conventions/windfall-conventions.yml.
  - type: StatusPage
    reason: status.windfall.com and status.windfalldata.com both 404.
  - type: Deprecation
    reason: No deprecation policy and no RFC 8594 Sunset/Deprecation headers.
  - type: ChangeLog
    reason: No dated changelog or release notes; /changelog 404s on both hosts.
  - type: Security
    reason: No vulnerability disclosure program, no security.txt on any host, no bug bounty.
  - type: WellKnown
    reason: Every /.well-known path 404s (or 401s behind the API gateway) on all four hosts — well-known/windfall-well-known.yml.
  - type: AgentCard
    reason: No A2A agent card at /.well-known/agent-card.json or /.well-known/agent.json on any host.
  - type: AsyncAPI
    reason: No event
    streaming or webhook surface exists — the API is a single synchronous request/response operation.: null
  - type: Webhooks
    reason: No webhook catalog is documented anywhere in the nine-page reference.
  - type: OAuthScopes
    reason: No OAuth 2.0 surface; authentication is a single static header token.
  - type: Pricing
    reason: https://www.windfall.com/pricing 404s and the 146-URL sitemap contains no pricing route.
  - type: SignUp
    reason: No self-service signup — API tokens are issued by Windfall against a purchase order.
  - type: Roadmap
    reason: No public roadmap.
  - type: CLI
    reason: No first-party command-line tool.
  - type: Protobuf
    reason: No gRPC or protobuf surface.
  - type: ToolCrosswalk
    reason: No MCP server and no GraphQL surface to crosswalk against the OpenAPI — mcp/windfall-mcp.yml deployment.mode is
      none.
x-enrichment:
  date: '2026-08-14'
  status: enriched
  artifacts_added: 3
  pass: local-v1

Windfall API — frequently asked questions

Does Windfall have an API?

Yes. APIs.io lists 1 API from Windfall, including Windfall API.

Is there an OpenAPI specification for the Windfall API?

Yes. APIs.io indexes 1 OpenAPI specification for Windfall, each linked for download from this page.

How do I authenticate with the Windfall API?

Windfall uses bearer-token authentication (apiKey · 1 scheme). The details are profiled on APIs.io as Windfall Authentication.

Is the Windfall API ready for AI agents?

Windfall has a Kin Score of 51.8 out of 100 (developing) and an Agent Readiness score of 31.5 (agent-ready), scored by API Evangelist on 2026-11-06.

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