Apollo.io

Apollo.io is a sales intelligence and engagement platform combining a 270M+ contact database with email and call sequencing. The Apollo REST API exposes people search & enrichment, organization search & enrichment, contacts, accounts, deals, sequences, email accounts, calls, tasks, meetings, lists, and webhooks.

22 APIs 10 Features

Sales IntelligenceProspectingEngagementB2B DataEnrichmentSaaS

APIs

Apollo People Search API

Search Apollo's 270M+ person database by title, location, seniority, function, industry, technology stack, and other filters. Returns matching people with optional enrichment fi...

Apollo Organization Search API

Search Apollo's organization database by industry, headcount, revenue, technology stack, location, and funding stage.

Apollo People Enrichment API

Enrich a known person record by email, LinkedIn URL, name + company, or other identifiers; returns work email, mobile, title, social profiles, and tenure.

Apollo Organization Enrichment API

Enrich a known organization by domain or LinkedIn URL; returns headcount, industry, revenue, funding, technologies, and location.

Apollo Bulk People Enrichment API

Enrich up to 10 person records in a single API call to reduce round-trip and credit cost.

Apollo Bulk Organization Enrichment API

Enrich multiple organizations in a single API call.

Apollo Contacts API

Manage contacts in your Apollo CRM workspace — create, update, delete, and bulk-import contacts with custom fields and tags.

Apollo Accounts API

Manage accounts (companies) in your Apollo CRM with stage, ownership, and custom fields.

Apollo Deals API

Manage deals (opportunities) attached to accounts and contacts, including stage, value, probability, and custom fields.

Apollo Sequences API

Manage outreach sequences (cadences) and add or remove contacts as sequence subscribers; trigger sends and pause/resume schedules.

Apollo Email Accounts API

Manage connected email accounts (Gmail / Outlook / SMTP) used for outbound sequence sends and inbox sync.

Apollo Emails API

Read sent / received email metadata and tracking events (open, click, reply, bounce) for sequence emails.

Apollo Calls API

Log inbound and outbound calls with duration, recording URLs, transcripts, and disposition outcomes.

Apollo Tasks API

Manage user tasks tied to contacts and accounts.

Apollo Meetings API

Manage meetings booked via Apollo's Meetings (scheduling) feature and synced from connected calendar accounts.

Apollo Custom Fields API

Define and read custom field schemas across people, organizations, contacts, accounts, and deals.

Apollo Lists API

Manage saved lists (static and dynamic) for segmenting people and accounts and feeding them into sequences and dialer queues.

Apollo Tags API

Read, create, and apply tags to contacts and accounts for categorization and filtering.

Apollo Users API

Manage users (sales reps, managers) and their roles within the Apollo workspace.

Apollo Analytics API

Pull aggregated activity, sequence performance, dialer, and pipeline analytics for reporting use cases.

Apollo API Usage API

Read your workspace's API usage and remaining credit balance across hourly, daily, and monthly windows.

Apollo Webhooks API

Subscribe to Apollo events (contact.created, sequence.added, email.opened, call.completed) for downstream automation.

Features

REST API at https://api.apollo.io/api/v1/

API key authentication via X-Api-Key header

270M+ person database, 60M+ companies

Free, Basic, Professional, Organization plans

Per-user-per-month seat pricing plus monthly credit allocations

Search, Enrichment, and Mobile credits each tracked separately

Bulk endpoints for batched enrichment to save credits

Per-minute and per-hour API rate limits scaled by plan tier

Webhooks for sequence and engagement events

REST API access requires Basic or higher

Resources

Documentation

API Reference

GitHub Organization

GitHub Organization

Privacy Policy

Terms of Service

Terms of Service

Authentication

Rate Limits

Sources

aid: apollo-io
url: https://raw.githubusercontent.com/api-evangelist/apollo-io/refs/heads/main/apis.yml
name: Apollo.io
x-type: company
description: >-
  Apollo.io is a sales intelligence and engagement platform combining a
  270M+ contact database with email and call sequencing. The Apollo REST
  API exposes people search & enrichment, organization search &
  enrichment, contacts, accounts, deals, sequences, email accounts, calls,
  tasks, meetings, lists, and webhooks.
image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg
tags:
  - Sales Intelligence
  - Prospecting
  - Engagement
  - B2B Data
  - Enrichment
  - SaaS
created: '2026-05-08'
modified: '2026-05-08'
specificationVersion: '0.19'
apis:
  - aid: apollo-io:apollo-people-search-api
    name: Apollo People Search API
    tags:
      - People
      - Search
      - Prospecting
    properties:
      - url: https://docs.apollo.io/
        type: Documentation
      - url: https://docs.apollo.io/reference/people-search
        type: API Reference
      - url: openapi/apollo-io-openapi.yml
        type: OpenAPI
    description: >-
      Search Apollo's 270M+ person database by title, location,
      seniority, function, industry, technology stack, and other
      filters. Returns matching people with optional enrichment fields.
  - aid: apollo-io:apollo-organization-search-api
    name: Apollo Organization Search API
    tags:
      - Organizations
      - Companies
      - Search
    properties:
      - url: https://docs.apollo.io/reference/organization-search
        type: API Reference
    description: >-
      Search Apollo's organization database by industry, headcount,
      revenue, technology stack, location, and funding stage.
  - aid: apollo-io:apollo-people-enrichment-api
    name: Apollo People Enrichment API
    tags:
      - People
      - Enrichment
    properties:
      - url: https://docs.apollo.io/reference/people-enrichment
        type: API Reference
    description: >-
      Enrich a known person record by email, LinkedIn URL, name + company,
      or other identifiers; returns work email, mobile, title, social
      profiles, and tenure.
  - aid: apollo-io:apollo-organization-enrichment-api
    name: Apollo Organization Enrichment API
    tags:
      - Organizations
      - Enrichment
    properties:
      - url: https://docs.apollo.io/reference/organization-enrichment
        type: API Reference
    description: >-
      Enrich a known organization by domain or LinkedIn URL; returns
      headcount, industry, revenue, funding, technologies, and location.
  - aid: apollo-io:apollo-bulk-people-enrichment-api
    name: Apollo Bulk People Enrichment API
    tags:
      - Bulk Enrichment
      - People
    properties:
      - url: https://docs.apollo.io/reference/bulk-people-enrichment
        type: API Reference
    description: >-
      Enrich up to 10 person records in a single API call to reduce
      round-trip and credit cost.
  - aid: apollo-io:apollo-bulk-organization-enrichment-api
    name: Apollo Bulk Organization Enrichment API
    tags:
      - Bulk Enrichment
      - Organizations
    properties:
      - url: https://docs.apollo.io/reference/bulk-organization-enrichment
        type: API Reference
    description: >-
      Enrich multiple organizations in a single API call.
  - aid: apollo-io:apollo-contacts-api
    name: Apollo Contacts API
    tags:
      - Contacts
      - CRM
    properties:
      - url: https://docs.apollo.io/reference/contacts
        type: API Reference
    description: >-
      Manage contacts in your Apollo CRM workspace — create, update,
      delete, and bulk-import contacts with custom fields and tags.
  - aid: apollo-io:apollo-accounts-api
    name: Apollo Accounts API
    tags:
      - Accounts
      - CRM
    properties:
      - url: https://docs.apollo.io/reference/accounts
        type: API Reference
    description: >-
      Manage accounts (companies) in your Apollo CRM with stage,
      ownership, and custom fields.
  - aid: apollo-io:apollo-deals-api
    name: Apollo Deals API
    tags:
      - Deals
      - Opportunities
      - Pipeline
    properties:
      - url: https://docs.apollo.io/reference/deals
        type: API Reference
    description: >-
      Manage deals (opportunities) attached to accounts and contacts,
      including stage, value, probability, and custom fields.
  - aid: apollo-io:apollo-sequences-api
    name: Apollo Sequences API
    tags:
      - Sequences
      - Cadences
      - Outreach
    properties:
      - url: https://docs.apollo.io/reference/sequences
        type: API Reference
    description: >-
      Manage outreach sequences (cadences) and add or remove contacts as
      sequence subscribers; trigger sends and pause/resume schedules.
  - aid: apollo-io:apollo-email-accounts-api
    name: Apollo Email Accounts API
    tags:
      - Email Accounts
      - SMTP
    properties:
      - url: https://docs.apollo.io/reference/email-accounts
        type: API Reference
    description: >-
      Manage connected email accounts (Gmail / Outlook / SMTP) used for
      outbound sequence sends and inbox sync.
  - aid: apollo-io:apollo-emails-api
    name: Apollo Emails API
    tags:
      - Emails
      - Tracking
    properties:
      - url: https://docs.apollo.io/reference/emails
        type: API Reference
    description: >-
      Read sent / received email metadata and tracking events (open,
      click, reply, bounce) for sequence emails.
  - aid: apollo-io:apollo-calls-api
    name: Apollo Calls API
    tags:
      - Calls
      - Telephony
    properties:
      - url: https://docs.apollo.io/reference/calls
        type: API Reference
    description: >-
      Log inbound and outbound calls with duration, recording URLs,
      transcripts, and disposition outcomes.
  - aid: apollo-io:apollo-tasks-api
    name: Apollo Tasks API
    tags:
      - Tasks
    properties:
      - url: https://docs.apollo.io/reference/tasks
        type: API Reference
    description: >-
      Manage user tasks tied to contacts and accounts.
  - aid: apollo-io:apollo-meetings-api
    name: Apollo Meetings API
    tags:
      - Meetings
      - Scheduling
    properties:
      - url: https://docs.apollo.io/reference/meetings
        type: API Reference
    description: >-
      Manage meetings booked via Apollo's Meetings (scheduling) feature
      and synced from connected calendar accounts.
  - aid: apollo-io:apollo-custom-fields-api
    name: Apollo Custom Fields API
    tags:
      - Custom Fields
      - Metadata
    properties:
      - url: https://docs.apollo.io/reference/custom-fields
        type: API Reference
    description: >-
      Define and read custom field schemas across people, organizations,
      contacts, accounts, and deals.
  - aid: apollo-io:apollo-lists-api
    name: Apollo Lists API
    tags:
      - Lists
      - Segments
    properties:
      - url: https://docs.apollo.io/reference/lists
        type: API Reference
    description: >-
      Manage saved lists (static and dynamic) for segmenting people and
      accounts and feeding them into sequences and dialer queues.
  - aid: apollo-io:apollo-tags-api
    name: Apollo Tags API
    tags:
      - Tags
    properties:
      - url: https://docs.apollo.io/reference/tags
        type: API Reference
    description: >-
      Read, create, and apply tags to contacts and accounts for
      categorization and filtering.
  - aid: apollo-io:apollo-users-api
    name: Apollo Users API
    tags:
      - Users
    properties:
      - url: https://docs.apollo.io/reference/users
        type: API Reference
    description: >-
      Manage users (sales reps, managers) and their roles within the
      Apollo workspace.
  - aid: apollo-io:apollo-analytics-api
    name: Apollo Analytics API
    tags:
      - Analytics
      - Reporting
    properties:
      - url: https://docs.apollo.io/reference/analytics
        type: API Reference
    description: >-
      Pull aggregated activity, sequence performance, dialer, and
      pipeline analytics for reporting use cases.
  - aid: apollo-io:apollo-api-usage-api
    name: Apollo API Usage API
    tags:
      - Usage
      - Credits
    properties:
      - url: https://docs.apollo.io/reference/api-usage
        type: API Reference
    description: >-
      Read your workspace's API usage and remaining credit balance
      across hourly, daily, and monthly windows.
  - aid: apollo-io:apollo-webhooks-api
    name: Apollo Webhooks API
    tags:
      - Webhooks
      - Events
    properties:
      - url: https://docs.apollo.io/reference/webhooks
        type: API Reference
    description: >-
      Subscribe to Apollo events (contact.created, sequence.added,
      email.opened, call.completed) for downstream automation.
common:
  - type: Website
    url: https://www.apollo.io/
  - type: Documentation
    url: https://docs.apollo.io/
  - type: API Reference
    url: https://docs.apollo.io/reference
  - type: Pricing
    url: https://www.apollo.io/pricing
  - type: Login
    url: https://app.apollo.io/
  - type: Status
    url: https://status.apollo.io/
  - type: Blog
    url: https://www.apollo.io/blog
  - type: Support
    url: https://knowledge.apollo.io/
  - type: GitHub Organization
    url: https://github.com/apolloio
  - type: Privacy Policy
    url: https://www.apollo.io/privacy-policy
  - type: Terms of Service
    url: https://www.apollo.io/terms
  - type: Authentication
    url: https://docs.apollo.io/reference/authentication
  - type: Rate Limits
    url: https://docs.apollo.io/reference/rate-limits
  - type: Webhooks
    url: https://docs.apollo.io/reference/webhooks
  - type: Plans
    url: plans/apollo-io-plans-pricing.yml
  - type: RateLimits
    url: rate-limits/apollo-io-rate-limits.yml
  - type: FinOps
    url: finops/apollo-io-finops.yml
  - type: Features
    data:
      - REST API at https://api.apollo.io/api/v1/
      - API key authentication via X-Api-Key header
      - 270M+ person database, 60M+ companies
      - Free, Basic, Professional, Organization plans
      - Per-user-per-month seat pricing plus monthly credit allocations
      - Search, Enrichment, and Mobile credits each tracked separately
      - Bulk endpoints for batched enrichment to save credits
      - Per-minute and per-hour API rate limits scaled by plan tier
      - Webhooks for sequence and engagement events
      - REST API access requires Basic or higher
    sources:
      - https://www.apollo.io/pricing
      - https://docs.apollo.io/
    updated: '2026-05-08'
maintainers:
  - FN: Kin Lane
    email: [email protected]