# Apollo API Documentation

**Canonical:** https://apis.io/providers/apollo-api-documentation/  
**Website:** https://docs.apollo.io/  
**APIs profiled:** 14

Apollo.io is a sales intelligence and engagement platform. Its REST API provides programmatic access to a database of over 240 million contacts and 30 million companies, covering people and organization enrichment (single and bulk), people/company/news search, and go-to-market workflow management across accounts, contacts, deals, sequences, emails, tasks, calls, conversations, lists and custom fields. Apollo users authenticate with an API key in the x-api-key header; partners building on behalf of mutual users authenticate with OAuth 2.0. Apollo publishes a complete OpenAPI 3.1 specification, a hosted remote MCP server at mcp.apollo.io, and a first-party CLI.

## Kin Score — 62.3 / 100 (strong)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 62.3).

| Facet | Score |
|---|---|
| Discoverability | 81.5 |
| Contract Quality | 69.9 |
| Governance | 16.7 |
| Contract Governance | 16.7 |
| Operational Transparency | 42.1 |
| Developer Ergonomics | 45.8 |
| Commercial Clarity | 100.0 |
| Access Clarity | 100.0 |

## Agent readiness — 48.8 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | documented |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | documented |
| OpenAPI Examples | verified |
| Rate Limit Signal | documented |
| Event Surface Described | yes |
| Agent Skills | derived |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Freemium — onboarding: unknown, pricing: freemium, trial: no (confidence: medium).

## APIs (14)

- **Apollo API Accounts** — Create, update, and search the companies your team tracks in Apollo. Harvested from the Apollo-published OpenAPI 3.1 specification — 8 operation(s).
- **Apollo API Analytics** — Query saved analytics reports. Harvested from the Apollo-published OpenAPI 3.1 specification — 1 operation(s).
- **Apollo API Calls** — Log and update call records made inside or outside Apollo. Harvested from the Apollo-published OpenAPI 3.1 specification — 3 operation(s).
- **Apollo API Contacts** — Create, update, and search the people your team saves in Apollo. Harvested from the Apollo-published OpenAPI 3.1 specification — 10 operation(s).
- **Apollo API Conversations** — Search, export, and retrieve recorded conversations. Harvested from the Apollo-published OpenAPI 3.1 specification — 4 operation(s).
- **Apollo API Deals** — Create, update, and track deals in your pipeline. Harvested from the Apollo-published OpenAPI 3.1 specification — 5 operation(s).
- **Apollo API Emailer Messages** — The Emailer Messages surface of the Apollo API. Harvested from the Apollo-published OpenAPI 3.1 specification — 4 operation(s).
- **Apollo API Enrichment** — Enrich people and company records, individually or in bulk. Harvested from the Apollo-published OpenAPI 3.1 specification — 4 operation(s).
- **Apollo API Fields** — List, create, and update the fields and custom fields in your Apollo account. Harvested from the Apollo-published OpenAPI 3.1 specification — 4 operation(s).
- **Apollo API Miscellaneous** — Users, email accounts, lists, notes, usage stats, and webhook results. Harvested from the Apollo-published OpenAPI 3.1 specification — 12 operation(s).
- **Apollo API Search** — Search Apollo's database of people, companies, news articles, and job postings. Harvested from the Apollo-published OpenAPI 3.1 specification — 6 operation(s).
- **Apollo API Sequences** — Manage outreach sequences and the contacts enrolled in them. Harvested from the Apollo-published OpenAPI 3.1 specification — 12 operation(s).
- **Apollo API Tasks** — Create and search tasks for your go-to-market workflows. Harvested from the Apollo-published OpenAPI 3.1 specification — 7 operation(s).
- **Apollo MCP** — Apollo's hosted remote Model Context Protocol server. Streamable HTTP transport at https://mcp.apollo.io/mcp, OAuth 2.0 authorization with dynamic client registration, exposing ...

## MCP servers (1)

- **Apollo MCP** — Apollo ships a first-party hosted remote MCP server that exposes its 240M+ contact database, real-time enrichment engine, CRM records, sequences, tasks, conversations and analyt...

## Agentic access (1)

- **Apollo Api Documentation Agentic Access** — 80 operations · 54 acting · 1 human-in-the-loop

## Security (3)

- **Apollo Api Documentation Authentication** — apiKey/http · 2 schemes
- **Apollo Api Documentation Domain Security** — TLSv1.3 · HSTS · DMARC
- **Apollo Api Documentation Trust Center** — SOC 2, ISO 27001, GDPR

## Plans (1)

- **Apollo Api Documentation Plans Pricing**

## Use cases (4)

- **Sales Intelligence** — Access Apollo's contact and company database for prospecting and outreach.
- **Data Enrichment Pipelines** — Enrich CRM records with contact and organization data at scale.
- **Partner Integrations** — Build third-party integrations using OAuth 2.0 to access Apollo data for mutual customers.
- **Workflow Automation** — Automate sales workflows including sequences, tasks, and deal management.

## Tags

API Documentation, Sales Intelligence, Data Enrichment, People Search, Company Search, Sales Engagement, CRM, MCP, Agents, Go-To-Market

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/apollo-api-documentation/). Scores are computed from the provider's own public artifacts under a published rubric.