# CustomerOS

**Canonical:** https://apis.io/providers/customeros/  
**Website:** https://customeros.ai  
**APIs profiled:** 4

CustomerOS (formerly Openline) is a London-based revenue-intelligence platform for B2B go-to-market teams. It identifies anonymous website visitors, scores them against an ideal customer profile, infers buying stage from page engagement, and attributes content and ad spend to real pipeline. The developer surface spans a first-party JavaScript website tracker installed behind a customer-owned reverse-proxy CNAME, a set of key-authenticated REST APIs published as OpenAPI in the company monorepo (CustomerBASE contacts and organizations, person and organization enrichment, email verification and IP intelligence, Mailstack sending domains and mailboxes, billing invoices, outreach tracking), a 34-operation Flow API for outbound sequencing, and the open-source customer-os-api GraphQL server that predates the pivot. CustomerOS also runs a live anonymous MCP server and serves an A2A agent card from its documentation host.

## Kin Score — 50.2 / 100 (developing)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 50.2).

| Facet | Score |
|---|---|
| Discoverability | 81.5 |
| Contract Quality | 54.2 |
| Governance | 16.7 |
| Contract Governance | 16.7 |
| Operational Transparency | 18.4 |
| Developer Ergonomics | 37.5 |
| Commercial Clarity | 82.9 |
| Access Clarity | 82.9 |

## Agent readiness — 45.8 (agent-ready)

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

## Access

Paid · Sales-assisted onboarding · API access granted on request — onboarding: unknown, pricing: paid, trial: no (confidence: high).

## APIs (4)

- **CustomerOS REST API** — Key-authenticated REST surface for the customeros.ai cloud, published as six OpenAPI 3.0.1 documents (one per tag) plus the source Swagger 2.0 in github.com/customeros/customero...
- **CustomerOS Flow API** — 34-operation REST API for outbound sequencing — flows, sequences, steps (email, LinkedIn or manual), senders with warming state and daily send limits, sending schedules, opt-out...
- **CustomerOS Website Tracker** — Client-side JavaScript tracker that captures page views and custom events, exposes window.cos.identify() for attaching identity and properties, and matches visitor IPs to compan...
- **CustomerOS GraphQL API** — Single GraphQL endpoint served by the open-source customer-os-api (Go, gqlgen) covering organizations, contacts, opportunities, contracts, invoices, interactions and timeline ev...

## MCP servers (1)

- **CustomerOS MCP Server** — CustomerOS runs a live, anonymous, remote MCP server on its documentation host. It is a DOCUMENTATION server (search + a read-only virtual filesystem over the docs pages and the...

## Agentic access (1)

- **Customeros Agentic Access** — 57 operations · 30 acting · 1 human-in-the-loop

## Security (3)

- **Customeros Authentication** — apiKey · 2 schemes
- **Customeros Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC
- **Customeros Trust Center** — CASA Type 2

## Plans (1)

- **Customeros Plans Pricing**

## Tags

CRM, Revenue, Go-To-Market, Lead Intelligence, Visitor Identification, Attribution, Email Verification, Enrichment, GraphQL, Open-Source

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