Apollo

Apollo.io is an AI-powered B2B sales intelligence and engagement platform combining a database of 230M+ verified contacts and 30M+ companies with prospecting, outreach, and deal execution tools. The platform helps sales teams build pipeline, qualify inbound leads, enrich data, and close deals faster with AI-powered workflows and conversation intelligence.

Apollo publishes 14 APIs on the APIs.io network, including Accounts API, Contacts API, Email Accounts API, and 11 more. Tagged areas include AI, B2B Sales, CRM, Data Enrichment, and Lead Generation.

Apollo’s developer surface includes documentation, getting-started guide, pricing, engineering blog, support, training material, and 8 more developer resources.

🌐 Visit website 📡 Source on GitHub

46.8/100 developing ▬ flat Agent 22/100 agent aware Full breakdown ↓
scored 2026-07-28 · rubric v0.6

AccessFreemiumApproval

15 APIs 10 Features 5 Use Cases

AIB2B SalesCRMData EnrichmentLead GenerationSales IntelligenceSales Platform

Kin Score

Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6

Composite quality — 46.8/100 · developing

Contract Quality 13.0 / 25

Developer Ergonomics 5.2 / 20

Commercial Clarity 17.4 / 20

Operational Transparency 4.8 / 13

Governance 0.0 / 12

Discoverability 6.5 / 10

Agent readiness — 22/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

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/apollo: 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 15

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

Apollo Client

Apollo Client provides libraries and integrations for connecting to Apollo.io's sales platform from external applications and CRM systems.

Apollo Accounts API

The Accounts API from Apollo — 3 operation(s) for accounts.

Apollo Contacts API

The Contacts API from Apollo — 3 operation(s) for contacts.

Apollo Email Accounts API

The Email Accounts API from Apollo — 1 operation(s) for email accounts.

Apollo Emailer Campaigns API

The Emailer Campaigns API from Apollo — 3 operation(s) for emailer campaigns.

Apollo Mixed Companies API

The Mixed Companies API from Apollo — 1 operation(s) for mixed companies.

Apollo Mixed People API

The Mixed People API from Apollo — 1 operation(s) for mixed people.

Apollo Opportunities API

The Opportunities API from Apollo — 3 operation(s) for opportunities.

Apollo Organizations API

The Organizations API from Apollo — 2 operation(s) for organizations.

Apollo People API

The People API from Apollo — 2 operation(s) for people.

Apollo Phone Calls API

The Phone Calls API from Apollo — 3 operation(s) for phone calls.

Apollo Sync Report API

The Sync Report API from Apollo — 1 operation(s) for sync report.

Apollo Tasks API

The Tasks API from Apollo — 3 operation(s) for tasks.

Apollo Usage Stats API

The Usage Stats API from Apollo — 1 operation(s) for usage stats.

Apollo Users API

The Users API from Apollo — 1 operation(s) for users.

Scroll for all 15

Open Collections 1

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

Apollo.io API

OPEN COLLECTION

GraphQL 1

GraphQL schemas published by this provider.

Apollo.io GraphQL API

Apollo.io provides a GraphQL API alongside its REST API, accessible at `https://api.apollo.io/api/v1/`. The GraphQL interface exposes the full breadth of Apollo's B2B sales inte...

GRAPHQL

Pricing Plans 1

Published pricing tiers and plan structures.

Apollo Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Apollo Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Apollo Finops

FINOPS

Features 10

Notable capabilities this provider offers.

Outbound Prospecting

AI-powered multichannel outbound campaigns with email deliverability guardrails and workflow automations.

Inbound Lead Qualification

Anonymous visitor identification, real-time form enrichment, instant routing, and automated follow-ups.

Data Enrichment

Enrich contact and company records with always-fresh data from 230M+ verified contacts and 30M+ companies.

Deal Execution

Pre-meeting insights, AI call summaries, pipeline boards, and coaching dashboards.

AI Assistant

AI-powered assistant for automating sales research, writing, and workflow tasks.

Conversation Intelligence

Call recording, AI call summaries, and conversation analytics for sales coaching.

Chrome Extension

Browser extension for accessing Apollo data and workflows directly from any website.

Workflow Automation

No-code workflow automation engine for sales process automation.

Email Deliverability

Email deliverability guardrails to protect sender reputation and maximize inbox placement.

Meeting Scheduler

Integrated meeting scheduling functionality linked to sales workflows.

Scroll for all 10

Use Cases 5

What developers build with this provider.

Outbound Sales Prospecting

Find and engage ideal prospects at scale using Apollo's contact database and multichannel outreach.

Inbound Lead Management

Automatically qualify, route, and follow up on inbound leads in real time.

CRM Data Enrichment

Enrich Salesforce, HubSpot, and other CRM records with verified contact and company data.

Sales Pipeline Building

Build and manage sales pipeline with AI-assisted prospecting and deal execution tools.

Partner API Integration

Build third-party integrations using OAuth 2.0 to access Apollo data on behalf of customers.

Integrations 7

Pre-built integrations with other platforms and tools.

Salesforce

Bi-directional Salesforce CRM integration syncing contacts, accounts, activities, and sequences.

HubSpot

HubSpot CRM integration for syncing contact data and outreach activity.

Gmail

Gmail integration for email tracking and outreach directly from inbox.

Outlook

Microsoft Outlook integration for email tracking and outreach.

LinkedIn integration via Chrome extension for prospecting and data enrichment.

Zapier

Zapier integration for connecting Apollo to hundreds of other applications.

Slack

Slack integration for deal alerts and notifications.

Scroll for all 7

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

LlmsText

LlmsText

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

TrustCenter

TrustCenter

DomainSecurity

DomainSecurity

Compliance

Compliance

Learn 1

Tutorials, courses, talks, and written guidance

Training

Training

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

PrivacyPolicy

PrivacyPolicy

TermsOfService

TermsOfService

Company 1

The organization behind the API

Blog

Blog

Source (apis.yml)

aid: apollo
name: Apollo
description: Apollo.io is an AI-powered B2B sales intelligence and engagement platform combining a database of 230M+ verified
  contacts and 30M+ companies with prospecting, outreach, and deal execution tools. The platform helps sales teams build pipeline,
  qualify inbound leads, enrich data, and close deals faster with AI-powered workflows and conversation intelligence.
type: Index
accessModel:
  pricing: freemium
  onboarding: approval
  trial: false
  try_now: false
  public: false
  label: Freemium · Requires approval
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/apollo.png
tags:
- AI
- B2B Sales
- CRM
- Data Enrichment
- Lead Generation
- Sales Intelligence
- Sales Platform
url: https://raw.githubusercontent.com/api-evangelist/apollo/refs/heads/main/apis.yml
created: '2026-03-25'
modified: '2026-05-19'
specificationVersion: '0.19'
apis:
- aid: apollo:apollo-client
  name: Apollo Client
  description: Apollo Client provides libraries and integrations for connecting to Apollo.io's sales platform from external
    applications and CRM systems.
  humanURL: https://www.apollo.io/integrations
  tags:
  - CRM
  - Integrations
  - Salesforce
  - SDKs
  properties:
  - type: Documentation
    url: https://www.apollo.io/integrations
- aid: apollo:apollo-accounts-api
  name: Apollo Accounts API
  description: The Accounts API from Apollo — 3 operation(s) for accounts.
  humanURL: https://www.apollo.io/
  tags:
  - Accounts
  properties:
  - type: OpenAPI
    url: openapi/apollo-accounts-api-openapi.yml
  - type: Documentation
    url: https://docs.apollo.io/
  - type: GettingStarted
    url: https://docs.apollo.io/docs
  - type: APIReference
    url: https://docs.apollo.io/reference
  - type: Authentication
    url: https://docs.apollo.io/reference/authentication
  - type: RateLimits
    url: https://docs.apollo.io/reference/rate-limits
  - type: Tutorials
    url: https://docs.apollo.io/docs/overview-apollo-api-tutorials
  - type: GraphQL
    url: graphql/apollo-graphql.md
- aid: apollo:apollo-contacts-api
  name: Apollo Contacts API
  description: The Contacts API from Apollo — 3 operation(s) for contacts.
  humanURL: https://www.apollo.io/
  tags:
  - Contacts
  properties:
  - type: OpenAPI
    url: openapi/apollo-contacts-api-openapi.yml
  - type: Documentation
    url: https://docs.apollo.io/
  - type: GettingStarted
    url: https://docs.apollo.io/docs
  - type: APIReference
    url: https://docs.apollo.io/reference
  - type: Authentication
    url: https://docs.apollo.io/reference/authentication
  - type: RateLimits
    url: https://docs.apollo.io/reference/rate-limits
  - type: Tutorials
    url: https://docs.apollo.io/docs/overview-apollo-api-tutorials
  - type: GraphQL
    url: graphql/apollo-graphql.md
- aid: apollo:apollo-email-accounts-api
  name: Apollo Email Accounts API
  description: The Email Accounts API from Apollo — 1 operation(s) for email accounts.
  humanURL: https://www.apollo.io/
  tags:
  - Email Accounts
  properties:
  - type: OpenAPI
    url: openapi/apollo-email-accounts-api-openapi.yml
  - type: Documentation
    url: https://docs.apollo.io/
  - type: GettingStarted
    url: https://docs.apollo.io/docs
  - type: APIReference
    url: https://docs.apollo.io/reference
  - type: Authentication
    url: https://docs.apollo.io/reference/authentication
  - type: RateLimits
    url: https://docs.apollo.io/reference/rate-limits
  - type: Tutorials
    url: https://docs.apollo.io/docs/overview-apollo-api-tutorials
  - type: GraphQL
    url: graphql/apollo-graphql.md
- aid: apollo:apollo-emailer-campaigns-api
  name: Apollo Emailer Campaigns API
  description: The Emailer Campaigns API from Apollo — 3 operation(s) for emailer campaigns.
  humanURL: https://www.apollo.io/
  tags:
  - Emailer Campaigns
  properties:
  - type: OpenAPI
    url: openapi/apollo-emailer-campaigns-api-openapi.yml
  - type: Documentation
    url: https://docs.apollo.io/
  - type: GettingStarted
    url: https://docs.apollo.io/docs
  - type: APIReference
    url: https://docs.apollo.io/reference
  - type: Authentication
    url: https://docs.apollo.io/reference/authentication
  - type: RateLimits
    url: https://docs.apollo.io/reference/rate-limits
  - type: Tutorials
    url: https://docs.apollo.io/docs/overview-apollo-api-tutorials
  - type: GraphQL
    url: graphql/apollo-graphql.md
- aid: apollo:apollo-mixed-companies-api
  name: Apollo Mixed Companies API
  description: The Mixed Companies API from Apollo — 1 operation(s) for mixed companies.
  humanURL: https://www.apollo.io/
  tags:
  - Mixed Companies
  properties:
  - type: OpenAPI
    url: openapi/apollo-mixed-companies-api-openapi.yml
  - type: Documentation
    url: https://docs.apollo.io/
  - type: GettingStarted
    url: https://docs.apollo.io/docs
  - type: APIReference
    url: https://docs.apollo.io/reference
  - type: Authentication
    url: https://docs.apollo.io/reference/authentication
  - type: RateLimits
    url: https://docs.apollo.io/reference/rate-limits
  - type: Tutorials
    url: https://docs.apollo.io/docs/overview-apollo-api-tutorials
  - type: GraphQL
    url: graphql/apollo-graphql.md
- aid: apollo:apollo-mixed-people-api
  name: Apollo Mixed People API
  description: The Mixed People API from Apollo — 1 operation(s) for mixed people.
  humanURL: https://www.apollo.io/
  tags:
  - Mixed People
  properties:
  - type: OpenAPI
    url: openapi/apollo-mixed-people-api-openapi.yml
  - type: Documentation
    url: https://docs.apollo.io/
  - type: GettingStarted
    url: https://docs.apollo.io/docs
  - type: APIReference
    url: https://docs.apollo.io/reference
  - type: Authentication
    url: https://docs.apollo.io/reference/authentication
  - type: RateLimits
    url: https://docs.apollo.io/reference/rate-limits
  - type: Tutorials
    url: https://docs.apollo.io/docs/overview-apollo-api-tutorials
  - type: GraphQL
    url: graphql/apollo-graphql.md
- aid: apollo:apollo-opportunities-api
  name: Apollo Opportunities API
  description: The Opportunities API from Apollo — 3 operation(s) for opportunities.
  humanURL: https://www.apollo.io/
  tags:
  - Opportunities
  properties:
  - type: OpenAPI
    url: openapi/apollo-opportunities-api-openapi.yml
  - type: Documentation
    url: https://docs.apollo.io/
  - type: GettingStarted
    url: https://docs.apollo.io/docs
  - type: APIReference
    url: https://docs.apollo.io/reference
  - type: Authentication
    url: https://docs.apollo.io/reference/authentication
  - type: RateLimits
    url: https://docs.apollo.io/reference/rate-limits
  - type: Tutorials
    url: https://docs.apollo.io/docs/overview-apollo-api-tutorials
  - type: GraphQL
    url: graphql/apollo-graphql.md
- aid: apollo:apollo-organizations-api
  name: Apollo Organizations API
  description: The Organizations API from Apollo — 2 operation(s) for organizations.
  humanURL: https://www.apollo.io/
  tags:
  - Organizations
  properties:
  - type: OpenAPI
    url: openapi/apollo-organizations-api-openapi.yml
  - type: Documentation
    url: https://docs.apollo.io/
  - type: GettingStarted
    url: https://docs.apollo.io/docs
  - type: APIReference
    url: https://docs.apollo.io/reference
  - type: Authentication
    url: https://docs.apollo.io/reference/authentication
  - type: RateLimits
    url: https://docs.apollo.io/reference/rate-limits
  - type: Tutorials
    url: https://docs.apollo.io/docs/overview-apollo-api-tutorials
  - type: GraphQL
    url: graphql/apollo-graphql.md
- aid: apollo:apollo-people-api
  name: Apollo People API
  description: The People API from Apollo — 2 operation(s) for people.
  humanURL: https://www.apollo.io/
  tags:
  - People
  properties:
  - type: OpenAPI
    url: openapi/apollo-people-api-openapi.yml
  - type: Documentation
    url: https://docs.apollo.io/
  - type: GettingStarted
    url: https://docs.apollo.io/docs
  - type: APIReference
    url: https://docs.apollo.io/reference
  - type: Authentication
    url: https://docs.apollo.io/reference/authentication
  - type: RateLimits
    url: https://docs.apollo.io/reference/rate-limits
  - type: Tutorials
    url: https://docs.apollo.io/docs/overview-apollo-api-tutorials
  - type: GraphQL
    url: graphql/apollo-graphql.md
- aid: apollo:apollo-phone-calls-api
  name: Apollo Phone Calls API
  description: The Phone Calls API from Apollo — 3 operation(s) for phone calls.
  humanURL: https://www.apollo.io/
  tags:
  - Phone Calls
  properties:
  - type: OpenAPI
    url: openapi/apollo-phone-calls-api-openapi.yml
  - type: Documentation
    url: https://docs.apollo.io/
  - type: GettingStarted
    url: https://docs.apollo.io/docs
  - type: APIReference
    url: https://docs.apollo.io/reference
  - type: Authentication
    url: https://docs.apollo.io/reference/authentication
  - type: RateLimits
    url: https://docs.apollo.io/reference/rate-limits
  - type: Tutorials
    url: https://docs.apollo.io/docs/overview-apollo-api-tutorials
  - type: GraphQL
    url: graphql/apollo-graphql.md
- aid: apollo:apollo-sync-report-api
  name: Apollo Sync Report API
  description: The Sync Report API from Apollo — 1 operation(s) for sync report.
  humanURL: https://www.apollo.io/
  tags:
  - Sync Report
  properties:
  - type: OpenAPI
    url: openapi/apollo-sync-report-api-openapi.yml
  - type: Documentation
    url: https://docs.apollo.io/
  - type: GettingStarted
    url: https://docs.apollo.io/docs
  - type: APIReference
    url: https://docs.apollo.io/reference
  - type: Authentication
    url: https://docs.apollo.io/reference/authentication
  - type: RateLimits
    url: https://docs.apollo.io/reference/rate-limits
  - type: Tutorials
    url: https://docs.apollo.io/docs/overview-apollo-api-tutorials
  - type: GraphQL
    url: graphql/apollo-graphql.md
- aid: apollo:apollo-tasks-api
  name: Apollo Tasks API
  description: The Tasks API from Apollo — 3 operation(s) for tasks.
  humanURL: https://www.apollo.io/
  tags:
  - Tasks
  properties:
  - type: OpenAPI
    url: openapi/apollo-tasks-api-openapi.yml
  - type: Documentation
    url: https://docs.apollo.io/
  - type: GettingStarted
    url: https://docs.apollo.io/docs
  - type: APIReference
    url: https://docs.apollo.io/reference
  - type: Authentication
    url: https://docs.apollo.io/reference/authentication
  - type: RateLimits
    url: https://docs.apollo.io/reference/rate-limits
  - type: Tutorials
    url: https://docs.apollo.io/docs/overview-apollo-api-tutorials
  - type: GraphQL
    url: graphql/apollo-graphql.md
- aid: apollo:apollo-usage-stats-api
  name: Apollo Usage Stats API
  description: The Usage Stats API from Apollo — 1 operation(s) for usage stats.
  humanURL: https://www.apollo.io/
  tags:
  - Usage Stats
  properties:
  - type: OpenAPI
    url: openapi/apollo-usage-stats-api-openapi.yml
  - type: Documentation
    url: https://docs.apollo.io/
  - type: GettingStarted
    url: https://docs.apollo.io/docs
  - type: APIReference
    url: https://docs.apollo.io/reference
  - type: Authentication
    url: https://docs.apollo.io/reference/authentication
  - type: RateLimits
    url: https://docs.apollo.io/reference/rate-limits
  - type: Tutorials
    url: https://docs.apollo.io/docs/overview-apollo-api-tutorials
  - type: GraphQL
    url: graphql/apollo-graphql.md
- aid: apollo:apollo-users-api
  name: Apollo Users API
  description: The Users API from Apollo — 1 operation(s) for users.
  humanURL: https://www.apollo.io/
  tags:
  - Users
  properties:
  - type: OpenAPI
    url: openapi/apollo-users-api-openapi.yml
  - type: Documentation
    url: https://docs.apollo.io/
  - type: GettingStarted
    url: https://docs.apollo.io/docs
  - type: APIReference
    url: https://docs.apollo.io/reference
  - type: Authentication
    url: https://docs.apollo.io/reference/authentication
  - type: RateLimits
    url: https://docs.apollo.io/reference/rate-limits
  - type: Tutorials
    url: https://docs.apollo.io/docs/overview-apollo-api-tutorials
  - type: GraphQL
    url: graphql/apollo-graphql.md
common:
- type: AgenticAccess
  url: agentic-access/apollo-agentic-access.yml
- type: TrustCenter
  url: security/apollo-trust-center.yml
- type: DomainSecurity
  url: security/apollo-domain-security.yml
- type: GitHubOrganization
  url: https://github.com/apolloio
- type: Documentation
  url: https://docs.apollo.io/
- type: GettingStarted
  url: https://docs.apollo.io/docs
- type: Pricing
  url: https://www.apollo.io/pricing
- type: Blog
  url: https://www.apollo.io/blog
- type: Support
  url: https://www.apollo.io/support
- type: Training
  url: https://academy.apollo.io/
- type: PrivacyPolicy
  url: https://www.apollo.io/privacy-policy
- type: TermsOfService
  url: https://www.apollo.io/terms-of-service
- type: Compliance
  url: https://www.apollo.io/security
- type: Features
  data:
  - name: Outbound Prospecting
    description: AI-powered multichannel outbound campaigns with email deliverability guardrails and workflow automations.
  - name: Inbound Lead Qualification
    description: Anonymous visitor identification, real-time form enrichment, instant routing, and automated follow-ups.
  - name: Data Enrichment
    description: Enrich contact and company records with always-fresh data from 230M+ verified contacts and 30M+ companies.
  - name: Deal Execution
    description: Pre-meeting insights, AI call summaries, pipeline boards, and coaching dashboards.
  - name: AI Assistant
    description: AI-powered assistant for automating sales research, writing, and workflow tasks.
  - name: Conversation Intelligence
    description: Call recording, AI call summaries, and conversation analytics for sales coaching.
  - name: Chrome Extension
    description: Browser extension for accessing Apollo data and workflows directly from any website.
  - name: Workflow Automation
    description: No-code workflow automation engine for sales process automation.
  - name: Email Deliverability
    description: Email deliverability guardrails to protect sender reputation and maximize inbox placement.
  - name: Meeting Scheduler
    description: Integrated meeting scheduling functionality linked to sales workflows.
- type: UseCases
  data:
  - name: Outbound Sales Prospecting
    description: Find and engage ideal prospects at scale using Apollo's contact database and multichannel outreach.
  - name: Inbound Lead Management
    description: Automatically qualify, route, and follow up on inbound leads in real time.
  - name: CRM Data Enrichment
    description: Enrich Salesforce, HubSpot, and other CRM records with verified contact and company data.
  - name: Sales Pipeline Building
    description: Build and manage sales pipeline with AI-assisted prospecting and deal execution tools.
  - name: Partner API Integration
    description: Build third-party integrations using OAuth 2.0 to access Apollo data on behalf of customers.
- type: Integrations
  data:
  - name: Salesforce
    description: Bi-directional Salesforce CRM integration syncing contacts, accounts, activities, and sequences.
  - name: HubSpot
    description: HubSpot CRM integration for syncing contact data and outreach activity.
  - name: Gmail
    description: Gmail integration for email tracking and outreach directly from inbox.
  - name: Outlook
    description: Microsoft Outlook integration for email tracking and outreach.
  - name: LinkedIn
    description: LinkedIn integration via Chrome extension for prospecting and data enrichment.
  - name: Zapier
    description: Zapier integration for connecting Apollo to hundreds of other applications.
  - name: Slack
    description: Slack integration for deal alerts and notifications.
- type: LlmsText
  url: https://docs.apollo.io/llms.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com