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.
Limited machine-readable signal and partial portal coverage — documentation a human can read, but little a machine or agent can consume without scraping.
API Evangelist profiles Apollo the way a machine reads it — 60 machine-readable artifacts across 15 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Apollo scores 35.8/100 (thin), with a separate agent-readiness read of 20/100 (agent aware). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance. Every facet and dimension name is a link: it opens that measurement's page on APIs.io, where the rating runs across the whole catalog — the exact checks that feed it, how every profiled provider distributes on it, and who is at the top of it.
Kin Score
How this is scored →scored 2026-09-10 · rubric v0.20.0
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How we profile Apollo
Each block below is one kind of artifact we hold for Apollo. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 15
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
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 within the panel for all 15 ·
Open Collections 16
Open, tool-agnostic collections carry the same runnable value as Postman without locking you to one client — the portable, forkable form of the same exercise.
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
API Collection
OPEN COLLECTIONApollo.io Accounts API
OPEN COLLECTIONApollo.io Accounts Contacts API
OPEN COLLECTIONApollo.io Accounts Email Accounts API
OPEN COLLECTIONApollo.io Accounts Emailer Campaigns API
OPEN COLLECTIONApollo.io Accounts Mixed Companies API
OPEN COLLECTIONApollo.io Accounts Mixed People API
OPEN COLLECTIONApollo.io Accounts Opportunities API
OPEN COLLECTIONApollo.io Accounts Organizations API
OPEN COLLECTIONApollo.io Accounts People API
OPEN COLLECTIONApollo.io Accounts Phone Calls API
OPEN COLLECTIONApollo.io Accounts Sync Report API
OPEN COLLECTIONApollo.io Accounts Tasks API
OPEN COLLECTIONApollo.io Accounts Usage Stats API
OPEN COLLECTIONApollo.io Accounts Users API
OPEN COLLECTIONApollo.io API
OPEN COLLECTIONScroll within the panel for all 16 ·
GraphQL 1
Where a provider ships GraphQL, the schema is the contract. We profile it alongside the REST surface so the whole interface is legible in one place.
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...
GRAPHQLPricing Plans 1
Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the things the Kin Score reads for access clarity — renamed from commercial clarity in rubric 0.12, because a free statutory interface has access terms and no commercial ones.
Published pricing tiers and plan structures.
Apollo Plans Pricing
PLANSRate Limits 1
Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.
Documented rate limits and quota policies.
Apollo Rate Limits
RATE LIMITSFinOps 1
Cost, billing, and metering signals let a buyer model the financial operations of an API before it's live. We profile them for the same reason we profile pricing: the money is part of the contract.
Cost, billing, and metering signals for API financial operations.
Apollo Finops
FINOPSFeatures 10
The notable capabilities this provider advertises, captured as structured features so they can be searched and compared instead of read one landing page at a time.
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 within the panel for all 10 ·
Security Posture 2
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.
Recommended x-agentic-access execution contracts for AI agents.
Use Cases 5
What developers actually build with this provider — captured so the catalogue answers 'what is this for', not just 'what does this expose'.
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 tell you where this provider already fits in a stack.
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 within the panel for all 7 ·
Resources
Every other property we hold for Apollo — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Get Started 1
Portal, sign-up, and the first successful call
Documentation 1
Reference material describing how the API behaves
Agent Surfaces 2
MCP servers, agent skills, and machine-readable catalogs
Build 1
SDKs, sample code, and the tooling you integrate with
Access & Security 3
Authentication, authorization, and security posture
Learn 1
Tutorials, courses, talks, and written guidance
Operate 1
Status, limits, changes, and where to get help
Commercial 3
Pricing, plans, and the legal terms of use
Company 2
The organization behind the API
← All providers · Data indexed from github.com/api-evangelist/apollo · machine-readable index on apis.io
This is an independent, third-party profile of Apollo, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.
Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.
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