Leadspace

Leadspace is a B2B GTM Data Intelligence Cloud and customer data platform that unifies buyer data, account data, and buying signals into the Leadspace Universal Graph. Its API-first enrichment service resolves partial person and company records into full profiles carrying firmographics (SIC, NAICS, industry, revenue, employee counts), corporate family-tree hierarchy, department sizes, funding and investor history, installed-base and website technology signals, weekly buyer-intent models sourced from Leadspace Intent and Bombora, and persona and predictive fit scores. Leadspace exposes single and bulk enrichment, contact discovery (account expansion), and an intent-only refresh API over a single gateway, alongside Leadspace Studio for segment building and SmartForms for real-time inbound web-form enrichment. It integrates with Salesforce, Marketo, Eloqua, and HubSpot. Leadspace is ISO 27001 certified and SOC 2 Type II audited.

Leadspace publishes 3 APIs on the APIs.io network: Enrichment API, Discovery API, and Intent Only API. Tagged areas include B2B Data, Customer Data Platform, Data Enrichment, Intent Data, and Sales Intelligence.

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

Leadspace’s developer surface includes documentation, API reference, getting-started guide, support, engineering blog, signup flow, changelog, and 28 more developer resources.

🌐 Visit website 📡 Source on GitHub
55.5/100 developing Agent 89/100 agent native Full breakdown ↓
scored 2026-07-20 · rubric v0.4
3 APIs 1 MCP Servers 0 Features
B2B DataCustomer Data PlatformData EnrichmentIntent DataSales IntelligenceAccount-Based MarketingIdentity ResolutionFirmographicsLead ScoringCompany

API Rating

API Evangelist API Evangelist Rating How this is scored →
scored 2026-07-20 · rubric v0.4
Composite quality — 55.5/100 · developing
Contract Quality 15.4 / 25
Developer Ergonomics 13.5 / 20
Commercial Clarity 8.4 / 20
Operational Transparency 8.2 / 13
Governance 0.0 / 12
Discoverability 10.0 / 10
Agent readiness — 89/100 · 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 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
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/leadspace: 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

Leadspace Enrichment API

Single and bulk enrichment of person (lead/contact) and company (account) records against the Leadspace Universal Graph v4. Single requests are synchronous; bulk requests accept...

Leadspace Discovery API

Account expansion. Finds net-new contacts inside up to 500 target accounts per request, ranked against persona, region, and country criteria and filtered by required contact inf...

Leadspace Intent Only API

Refreshes buyer-intent values for accounts, returning top surging intent topics and scored intent-modeling projects sourced from Leadspace Intent or Bombora, on a weekly cadence.

MCP Servers

leadspace-mcp.yml

MCP SERVER

Rate Limits

Leadspace Rate Limits

0 limits

RATE LIMITS

Event Specifications

Leadspace Callbacks Webhooks

ASYNCAPI

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal
DeveloperPortal
 GettingStarted
GettingStarted
 SignUp
SignUp

Documentation 2

Reference material describing how the API behaves

Documentation
Documentation
 APIReference
APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess
 WellKnown
WellKnown
 MCPServer
MCPServer
 AgentSkill
AgentSkill
 LLMsTxt
LLMsTxt

Design & Contract 8

Pagination, idempotency, versioning, errors, and events

Lifecycle
Lifecycle
 Conventions
Conventions
 ErrorCatalog
ErrorCatalog
 ErrorCodes
ErrorCodes
 DataModel
DataModel
 Webhooks
Webhooks
 Conformance
Conformance
 Components
Components

Scroll for all 8

Build 2

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization
 Examples
Examples

Access & Security 5

Authentication, authorization, and security posture

Authentication
Authentication
 Compliance
Compliance
 Security
Security
 VulnerabilityDisclosure
VulnerabilityDisclosure
 DomainSecurity
DomainSecurity

Operate 6

Status, limits, changes, and where to get help

Support
Support
 StatusPage
StatusPage
 Deprecation
Deprecation
 ChangeLog
ChangeLog
 ChangeLogPage
ChangeLogPage
 RateLimits
RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy

Company 2

The organization behind the API

Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: leadspace
name: Leadspace
description: Leadspace is a B2B GTM Data Intelligence Cloud and customer data platform that unifies buyer data, account data,
  and buying signals into the Leadspace Universal Graph. Its API-first enrichment service resolves partial person and company
  records into full profiles carrying firmographics (SIC, NAICS, industry, revenue, employee counts), corporate family-tree
  hierarchy, department sizes, funding and investor history, installed-base and website technology signals, weekly buyer-intent
  models sourced from Leadspace Intent and Bombora, and persona and predictive fit scores. Leadspace exposes single and bulk
  enrichment, contact discovery (account expansion), and an intent-only refresh API over a single gateway, alongside Leadspace
  Studio for segment building and SmartForms for real-time inbound web-form enrichment. It integrates with Salesforce, Marketo,
  Eloqua, and HubSpot. Leadspace is ISO 27001 certified and SOC 2 Type II audited.
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
url: https://raw.githubusercontent.com/api-evangelist/leadspace/refs/heads/main/apis.yml
type: Index
kind: company
x-type: company
x-source: vc-portfolio
x-backed-by:
- battery-ventures
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- B2B Data
- Customer Data Platform
- Data Enrichment
- Intent Data
- Sales Intelligence
- Account-Based Marketing
- Identity Resolution
- Firmographics
- Lead Scoring
- Company
apis:
- aid: leadspace:leadspace-enrichment-api
  name: Leadspace Enrichment API
  description: Single and bulk enrichment of person (lead/contact) and company (account) records against the Leadspace Universal
    Graph v4. Single requests are synchronous; bulk requests accept up to 500 records and are collected by polling or via
    an optional completion callback.
  humanURL: https://support.leadspace.com/hc/en-us/articles/23687993264284-Leadspace-Single-Direct-API-v4-Technical-Specifications
  baseURL: https://apigw.leadspace.com
  tags:
  - Data Enrichment
  - Firmographics
  - Identity Resolution
  - Bulk Processing
  properties:
  - type: OpenAPI
    url: openapi/leadspace-enrichment-openapi.yml
  - type: Documentation
    url: https://support.leadspace.com/hc/en-us/articles/23687993264284-Leadspace-Single-Direct-API-v4-Technical-Specifications
  - type: Overlay
    url: overlays/leadspace-enrichment-overlay.yaml
  - type: BulkDocumentation
    url: https://support.leadspace.com/hc/en-us/articles/23687991628572-Leadspace-Bulk-API-v4-Technical-Specifications
- aid: leadspace:leadspace-discovery-api
  name: Leadspace Discovery API
  description: Account expansion. Finds net-new contacts inside up to 500 target accounts per request, ranked against persona,
    region, and country criteria and filtered by required contact information such as verified email or direct phone.
  humanURL: https://support.leadspace.com/hc/en-us/articles/360011926619-Leadspace-Discovery-API
  baseURL: https://apigw.leadspace.com
  tags:
  - Contact Discovery
  - Account Expansion
  - Personas
  - Sales Intelligence
  properties:
  - type: OpenAPI
    url: openapi/leadspace-discovery-openapi.yml
  - type: Documentation
    url: https://support.leadspace.com/hc/en-us/articles/360011926619-Leadspace-Discovery-API
  - type: Overlay
    url: overlays/leadspace-discovery-overlay.yaml
- aid: leadspace:leadspace-intent-api
  name: Leadspace Intent Only API
  description: Refreshes buyer-intent values for accounts, returning top surging intent topics and scored intent-modeling
    projects sourced from Leadspace Intent or Bombora, on a weekly cadence.
  humanURL: https://support.leadspace.com/hc/en-us/articles/360012583400-Leadspace-Intent-Only-API
  baseURL: https://apigw.leadspace.com
  tags:
  - Intent Data
  - Buyer Signals
  - Account Scoring
  properties:
  - type: OpenAPI
    url: openapi/leadspace-intent-openapi.yml
  - type: Documentation
    url: https://support.leadspace.com/hc/en-us/articles/360012583400-Leadspace-Intent-Only-API
  - type: Overlay
    url: overlays/leadspace-intent-overlay.yaml
common:
- type: AgenticAccess
  url: agentic-access/leadspace-agentic-access.yml
- type: Website
  url: https://www.leadspace.com/
- type: DeveloperPortal
  url: https://support.leadspace.com/hc/en-us/categories/5940743388306-Developer-Guides
- type: Documentation
  url: https://support.leadspace.com/hc/en-us
- type: APIReference
  url: https://support.leadspace.com/hc/en-us/sections/201997649-API
- type: GettingStarted
  url: https://support.leadspace.com/hc/en-us/categories/5778624503826-Getting-Started
- type: Support
  url: https://support.leadspace.com/hc/en-us
- type: Blog
  url: https://www.leadspace.com/blog
- type: GitHubOrganization
  url: https://github.com/leadspace
- type: SignUp
  url: https://studio.leadspace.com
- type: TermsOfService
  url: https://www.leadspace.com/service-support-terms
- type: PrivacyPolicy
  url: https://www.leadspace.com/privacy-notice
- type: StatusPage
  url: https://status.leadspace.com/
- type: Deprecation
  url: lifecycle/leadspace-lifecycle.yml
- type: Lifecycle
  url: lifecycle/leadspace-lifecycle.yml
- type: ChangeLog
  url: changelog/leadspace-changelog.yml
- type: ChangeLogPage
  url: https://support.leadspace.com/hc/en-us/categories/7154652740626-Release-Notes
- type: Authentication
  url: authentication/leadspace-authentication.yml
- type: Conventions
  url: conventions/leadspace-conventions.yml
- type: ErrorCatalog
  url: errors/leadspace-problem-types.yml
- type: ErrorCodes
  url: errors/leadspace-error-codes.yml
- type: RateLimits
  url: rate-limits/leadspace-rate-limits.yml
- type: DataModel
  url: data-model/leadspace-data-model.yml
- type: Examples
  url: examples/leadspace-examples.yml
- type: Webhooks
  url: asyncapi/leadspace-callbacks-webhooks.yml
- type: Conformance
  url: conformance/leadspace-conformance.yml
- type: Compliance
  url: https://support.leadspace.com/hc/en-us/articles/360012276859-General-Statement-of-Information-Security-and-Privacy
- type: Security
  url: https://www.leadspace.com/report-a-vulnerability
- type: VulnerabilityDisclosure
  url: security/leadspace-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/leadspace-domain-security.yml
- type: WellKnown
  url: well-known/leadspace-well-known.yml
- type: Components
  url: components/leadspace-components.yml
- type: MCPServer
  url: mcp/leadspace-mcp.yml
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/leadspace-llms.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence