LeadGenius

LeadGenius provides precision B2B contact and account intelligence for go-to-market teams, combining machine learning with a global team of human researchers so every contact and account is human-verified before delivery. The company reports 400+ customers, coverage across 42 countries and 3 billion+ data records served, with products spanning contact behavioral intelligence, advanced contact tags, contact monitoring, social tracking, buying-committee coverage and privacy compliance. Its developer surface is the LeadGenius Enrichment API — a RESTful, API-key authenticated service documented at docs.leadgenius.com that supports company enrichment, contact enrichment and contact append, offered both as asynchronous Campaigns (create a campaign, upload up to 200 records per request, receive a record-finalized webhook, retrieve the enriched results) and as real-time "rapid enrichment" requests submitted and collected by id.

LeadGenius publishes 5 APIs on the APIs.io network, including Campaigns API, Exclusion API, Rapid Enrichment API, and 2 more. Tagged areas include Company, Data Enrichment, Lead Generation, Sales, and Marketing.

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

LeadGenius’ developer surface includes documentation, API reference, getting-started guide, signup flow, support, engineering blog, authentication, and 25 more developer resources.

🌐 Visit website 📡 Source on GitHub

54.6/100 developing ▬ flat Agent 82/100 agent native Full breakdown ↓
scored 2026-07-27 · rubric v0.5

AccessSelf serve

5 APIs 1 MCP Servers

CompanyData EnrichmentLead GenerationSalesMarketingB2B DataContact DataFirmographicsGo To MarketAccount Based Marketing

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 54.6/100 · developing

Contract Quality 18.2 / 25

Developer Ergonomics 13.5 / 20

Commercial Clarity 8.4 / 20

Operational Transparency 4.4 / 13

Governance 0.0 / 12

Discoverability 10.0 / 10

Agent readiness — 82/100 · agent native

Machine-Readable Contract 18 / 18

Agentic Access Contract 15 / 15

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 6 / 6

Agent Skills 5 / 5

Well-Known Catalog 4 / 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/leadgenius: 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 5

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

MCP Servers 1

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

leadgenius-mcp.yml

MCP SERVER

Rate Limits 1

Documented rate limits and quota policies.

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Login

Documentation 3

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

OpenAPI

OpenAPI

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

MCPServer

AgentSkill

LLMsTxt

WellKnown

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

Conformance

DataModel

Webhooks

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Compliance

Compliance

Authentication

Authentication

Operate 2

Status, limits, changes, and where to get help

Support

Support

RateLimits

RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 4

The organization behind the API

Website

Website

Blog

Blog

LinkedIn

Twitter

Twitter

Other 2

Properties that don't map to a standard resource type

CaseStudies

CaseStudies

Overlay

Overlay

Source (apis.yml)

aid: leadgenius
name: LeadGenius
description: LeadGenius provides precision B2B contact and account intelligence for go-to-market teams, combining machine
  learning with a global team of human researchers so every contact and account is human-verified before delivery. The company
  reports 400+ customers, coverage across 42 countries and 3 billion+ data records served, with products spanning contact
  behavioral intelligence, advanced contact tags, contact monitoring, social tracking, buying-committee coverage and privacy
  compliance. Its developer surface is the LeadGenius Enrichment API — a RESTful, API-key authenticated service documented
  at docs.leadgenius.com that supports company enrichment, contact enrichment and contact append, offered both as asynchronous
  Campaigns (create a campaign, upload up to 200 records per request, receive a record-finalized webhook, retrieve the enriched
  results) and as real-time "rapid enrichment" requests submitted and collected by id.
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://cdn.prod.website-files.com/688ff1b200d9d4cf5019d518/68906378722ec3a7e64df624_logo.svg
url: https://raw.githubusercontent.com/api-evangelist/leadgenius/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- 500-global
- initialized-capital
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- Data Enrichment
- Lead Generation
- Sales
- Marketing
- B2B Data
- Contact Data
- Firmographics
- Go To Market
- Account Based Marketing
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- aid: leadgenius:leadgenius-campaigns-api
  name: LeadGenius Campaigns API
  description: Create, update and inspect enrichment campaigns.
  humanURL: https://docs.leadgenius.com/
  baseURL: https://leadgenius.com/api/v1/
  tags:
  - Campaigns
  properties:
  - type: OpenAPI
    url: openapi/leadgenius-campaigns-api-openapi.yml
  - type: Documentation
    url: https://docs.leadgenius.com/
  - type: APIReference
    url: https://docs.leadgenius.com/
  - type: GettingStarted
    url: https://docs.leadgenius.com/#leadgenius-api-docs
  - type: Authentication
    url: https://docs.leadgenius.com/#authentication
  - type: RateLimits
    url: https://docs.leadgenius.com/#rate-limits
  - type: Errors
    url: https://docs.leadgenius.com/#errors
  - type: Webhooks
    url: https://docs.leadgenius.com/#webhook
- aid: leadgenius:leadgenius-exclusion-api
  name: LeadGenius Exclusion API
  description: Submit accounts and contacts that should be excluded from enrichment.
  humanURL: https://docs.leadgenius.com/
  baseURL: https://leadgenius.com/api/v1/
  tags:
  - Exclusion
  properties:
  - type: OpenAPI
    url: openapi/leadgenius-exclusion-api-openapi.yml
  - type: Documentation
    url: https://docs.leadgenius.com/
  - type: APIReference
    url: https://docs.leadgenius.com/
  - type: GettingStarted
    url: https://docs.leadgenius.com/#leadgenius-api-docs
  - type: Authentication
    url: https://docs.leadgenius.com/#authentication
  - type: RateLimits
    url: https://docs.leadgenius.com/#rate-limits
  - type: Errors
    url: https://docs.leadgenius.com/#errors
  - type: Webhooks
    url: https://docs.leadgenius.com/#webhook
- aid: leadgenius:leadgenius-rapid-enrichment-api
  name: LeadGenius Rapid Enrichment API
  description: Real-time single-record account/contact enrichment and contact append.
  humanURL: https://docs.leadgenius.com/
  baseURL: https://leadgenius.com/api/v1/
  tags:
  - Rapid Enrichment
  properties:
  - type: OpenAPI
    url: openapi/leadgenius-rapid-enrichment-api-openapi.yml
  - type: Documentation
    url: https://docs.leadgenius.com/
  - type: APIReference
    url: https://docs.leadgenius.com/
  - type: GettingStarted
    url: https://docs.leadgenius.com/#leadgenius-api-docs
  - type: Authentication
    url: https://docs.leadgenius.com/#authentication
  - type: RateLimits
    url: https://docs.leadgenius.com/#rate-limits
  - type: Errors
    url: https://docs.leadgenius.com/#errors
  - type: Webhooks
    url: https://docs.leadgenius.com/#webhook
- aid: leadgenius:leadgenius-records-api
  name: LeadGenius Records API
  description: Upload records to a campaign and retrieve enriched results.
  humanURL: https://docs.leadgenius.com/
  baseURL: https://leadgenius.com/api/v1/
  tags:
  - Records
  properties:
  - type: OpenAPI
    url: openapi/leadgenius-records-api-openapi.yml
  - type: Documentation
    url: https://docs.leadgenius.com/
  - type: APIReference
    url: https://docs.leadgenius.com/
  - type: GettingStarted
    url: https://docs.leadgenius.com/#leadgenius-api-docs
  - type: Authentication
    url: https://docs.leadgenius.com/#authentication
  - type: RateLimits
    url: https://docs.leadgenius.com/#rate-limits
  - type: Errors
    url: https://docs.leadgenius.com/#errors
  - type: Webhooks
    url: https://docs.leadgenius.com/#webhook
- aid: leadgenius:leadgenius-usage-api
  name: LeadGenius Usage API
  description: Subscription usage and enrichment request statistics.
  humanURL: https://docs.leadgenius.com/
  baseURL: https://leadgenius.com/api/v1/
  tags:
  - Usage
  properties:
  - type: OpenAPI
    url: openapi/leadgenius-usage-api-openapi.yml
  - type: Documentation
    url: https://docs.leadgenius.com/
  - type: APIReference
    url: https://docs.leadgenius.com/
  - type: GettingStarted
    url: https://docs.leadgenius.com/#leadgenius-api-docs
  - type: Authentication
    url: https://docs.leadgenius.com/#authentication
  - type: RateLimits
    url: https://docs.leadgenius.com/#rate-limits
  - type: Errors
    url: https://docs.leadgenius.com/#errors
  - type: Webhooks
    url: https://docs.leadgenius.com/#webhook
common:
- type: DomainSecurity
  url: security/leadgenius-domain-security.yml
- type: AgenticAccess
  url: agentic-access/leadgenius-agentic-access.yml
- type: Website
  url: https://leadgenius.com
- type: DeveloperPortal
  url: https://docs.leadgenius.com/
- type: Documentation
  url: https://docs.leadgenius.com/
- type: APIReference
  url: https://docs.leadgenius.com/
- type: GettingStarted
  url: https://docs.leadgenius.com/#leadgenius-api-docs
- type: SignUp
  url: https://app.leadgenius.com/sign-up
- type: Login
  url: https://app.leadgenius.com/sign-in
- type: Support
  url: https://support.leadgenius.com/hc/en-us
- type: Blog
  url: https://www.leadgenius.com/resources
- type: TermsOfService
  url: https://www.leadgenius.com/legal/terms
- type: PrivacyPolicy
  url: https://www.leadgenius.com/legal/privacy
- type: Compliance
  url: https://www.leadgenius.com/legal/ccpa
- type: GitHubOrganization
  url: https://github.com/leadgenius
- type: LinkedIn
  url: https://www.linkedin.com/company/leadgenius/
- type: Twitter
  url: https://twitter.com/leadgenius
- type: CaseStudies
  url: https://www.leadgenius.com/customers
- type: OpenAPI
  url: openapi/leadgenius-enrichment-api-openapi.yml
- type: Overlay
  url: overlays/leadgenius-enrichment-api-overlay.yaml
- type: Authentication
  url: authentication/leadgenius-authentication.yml
- type: Conventions
  url: conventions/leadgenius-conventions.yml
- type: ErrorCatalog
  url: errors/leadgenius-problem-types.yml
- type: RateLimits
  url: rate-limits/leadgenius-rate-limits.yml
- type: Lifecycle
  url: lifecycle/leadgenius-lifecycle.yml
- type: Conformance
  url: conformance/leadgenius-conformance.yml
- type: DataModel
  url: data-model/leadgenius-data-model.yml
- type: Webhooks
  url: asyncapi/leadgenius-enrichment-webhooks.yml
- type: MCPServer
  url: mcp/leadgenius-mcp.yml
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/leadgenius-llms.txt
- type: WellKnown
  url: well-known/leadgenius-well-known.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

LeadGenius

Kin Score

APIs 5

LeadGenius Campaigns API

LeadGenius Exclusion API

LeadGenius Rapid Enrichment API

LeadGenius Records API

LeadGenius Usage API

MCP Servers 1

leadgenius-mcp.yml

Rate Limits 1

Leadgenius Rate Limits

Event Specifications 1

Leadgenius Enrichment Webhooks

Security Posture 2

Leadgenius Authentication

Leadgenius Domain Security

Agentic Access 1

Leadgenius Agentic Access

Resources