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 6 API contracts indexed on the APIs.io network, including Campaigns API, Exclusion API, Rapid Enrichment API, and 3 more. Tagged areas include Company, Data Enrichment, Lead Generation, Sales, and Marketing.

The LeadGenius catalog on APIs.io includes 1 event-driven AsyncAPI specification and 1 Spectral governance ruleset.

LeadGenius’ developer surface includes documentation, API reference, getting-started guide, signup flow, support, engineering blog, authentication, and 26 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

38.1/100 thin ▬ flat Agent 34/100 agent ready Front door AI 4/6 moderate Heartbeat 0/100 dormant saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 published contract 3 Agent Skills

Company Data Enrichment Lead Generation Sales Marketing B2B Data Contact Data Firmographics Go-To-Market Account Based Marketing

Kin Score

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

Composite quality — 38.1/100 · thin

Contract Quality 11.4 / 19

Developer Ergonomics 1.3 / 15

Access Clarity 5.3 / 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 — 34/100 · 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 6 / 6

Agent Skills 5 / 5

Well-Known Catalog 4 / 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 0 / 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/.

Show this score on your site.

It updates itself when the score changes. Paste this where you link to your API docs:

<a href="https://apis.io/providers/leadgenius/"><img src="https://apis.io/badge/leadgenius/card.svg" alt="LeadGenius on APIs.io — Kin Score by API Evangelist"></a>

Other styles, a README pill and a shields.io endpoint are on the badge page.

Raise your score.

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)
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too

5 more unmet checks in the Agent Readiness table above.

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

Developer Ergonomics scores 8.9 — up to +18.2 composite points
Access Clarity scores 35.5 — up to +12.9 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/leadgenius/apis.yml: open an issue on github.com/api-evangelist/leadgenius 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 6

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

LeadGenius Campaigns API

Create, update and inspect enrichment campaigns.

LeadGenius Exclusion API

Submit accounts and contacts that should be excluded from enrichment.

LeadGenius Rapid Enrichment API

Real-time single-record account/contact enrichment and contact append.

LeadGenius Records API

Upload records to a campaign and retrieve enriched results.

LeadGenius Usage API

Subscription usage and enrichment request statistics.

LeadGenius Enrichment API

The LeadGenius Enrichment API API from LeadGenius — 0 operation(s) for leadgenius enrichment api.

Open Collections 5

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

LeadGenius Enrichment Campaigns API

OPEN COLLECTION

LeadGenius Enrichment Campaigns Exclusion API

OPEN COLLECTION

LeadGenius Enrichment Campaigns Rapid Enrichment API

OPEN COLLECTION

LeadGenius Enrichment Campaigns Records API

OPEN COLLECTION

LeadGenius Enrichment Campaigns Usage API

OPEN COLLECTION

Agent Skills 3

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

Append a buying committee to an account with LeadGenius

AGENT SKILL

Run a batch enrichment campaign with LeadGenius

AGENT SKILL

Enrich a company in real time with LeadGenius

AGENT SKILL

LeadGenius API pricing

Rate limits

API requests: 50 requests per minute
Records per request: 200 records per request

Rate-limit details →

Pricing Plans 1

Published pricing tiers and plan structures.

Leadgenius Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Leadgenius Rate Limits

2 limits

RATE LIMITS

Event Specifications 1

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

Leadgenius Enrichment Webhooks

ASYNCAPI

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

LeadGenius API Rules

70 rules · 68 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.

Leadgenius Enrichment Api Overlay

7 actions · update · leadgenius-enrichment-api-openapi.yml

DERIVED

Security Posture 2

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

Leadgenius Authentication

apiKey · 1 scheme

SECURITY

Leadgenius Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Leadgenius Agentic Access

11 operations · 5 acting

AGENTIC

Resources

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 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

X-MCPServerCandidate

X-MCPServerCandidate

AgentSkill

AgentSkill

LLMsTxt

LLMsTxt

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

Conformance

DataModel

Webhooks

Build 2

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

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 3

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Plans

Plans

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.
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
  generated: '2026-11-06'
  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: '0.23'
created: '2026-07-17'
modified: '2026-09-16'
tags:
- Company
- Data Enrichment
- Lead Generation
- Sales
- Marketing
- B2B Data
- Contact Data
- Firmographics
- Go-To-Market
- Account Based Marketing
tags_raw:
- 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
- aid: leadgenius:leadgenius-leadgenius-enrichment-api-api
  name: LeadGenius Enrichment API
  description: The LeadGenius Enrichment API API from LeadGenius — 0 operation(s) for leadgenius enrichment api.
  humanURL: https://docs.leadgenius.com/
  baseURL: https://leadgenius.com/api/v1/
  tags:
  - LeadGenius Enrichment API
  properties:
  - type: OpenAPI
    url: openapi/leadgenius-leadgenius-enrichment-api-api-openapi.yml
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/_original/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: X-MCPServerCandidate
  url: mcp/leadgenius-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: LLMsTxt
  url: llms/leadgenius-llms.txt
- type: Packages
  url: packages/leadgenius-packages.yml
- type: Plans
  url: plans/leadgenius-plans-pricing.yml
x-enrichment:
  date: '2026-08-13'
  status: enriched
  artifacts_added: 2
  pass: local-v1
  note: Prior WellKnown pointer removed - well-known/leadgenius-well-known.yml records a 404 on every path across all four
    LeadGenius hosts, so the pointer was asserting a surface the provider does not serve. No SDKs pointer (no first-party
    package exists), no Idempotency pointer (not supported), no StatusPage/Deprecation/Security/Roadmap/Postman/Pricing pointers
    (no such page is published), no AgentCard (probe missed on every host).

LeadGenius API — frequently asked questions

Does LeadGenius have an API?

Yes. APIs.io lists 6 APIs from LeadGenius, including LeadGenius Campaigns API, LeadGenius Exclusion API and LeadGenius Rapid Enrichment API, and 3 more.

Is there an OpenAPI specification for the LeadGenius API?

Yes. APIs.io indexes 6 OpenAPI specifications for LeadGenius, each linked for download from this page.

How do I authenticate with the LeadGenius API?

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

Is the LeadGenius API ready for AI agents?

LeadGenius has a Kin Score of 38.1 out of 100 (thin) and an Agent Readiness score of 33.5 (agent-ready), scored by API Evangelist on 2026-11-06.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/leadgenius"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/leadgenius/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/leadgenius/evidence"

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.