Attio

Attio is a modern, flexible, and data-driven customer relationship management (CRM) platform that lets revenue teams build a CRM around their unique data model with customizable objects, attributes, lists, and workflows. Attio syncs contacts and companies from email and calendar, enriches them with data, and powers reporting, sequences, and automations. The Attio REST API exposes full CRUD access to records, lists, objects, attributes, tasks, notes, threads, comments, and webhooks using Bearer token authentication and a public OpenAPI specification.

Attio publishes 1 API on the APIs.io network: REST API. Tagged areas include CRM, Customer Relationship Management, Sales, Contacts, and Companies.

Attio’s developer surface includes authentication, documentation, pricing, signup flow, and 8 more developer resources.

🌐 Visit website 📡 Source on GitHub

23.6/100 emerging ▼ -5.9 Agent 29/100 agent aware Full breakdown ↓
scored 2026-07-28 · rubric v0.6

1 APIs

CRMCustomer Relationship ManagementSalesContactsCompaniesPipelineWorkflows

Kin Score

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

Composite quality — 23.6/100 · emerging

Contract Quality 10.1 / 25

Developer Ergonomics 3.9 / 20

Commercial Clarity 2.1 / 20

Operational Transparency 0.7 / 13

Governance 0.0 / 12

Discoverability 6.9 / 10

Agent readiness — 29/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 8 / 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/attio: 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 1

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

Scopes 1

OAuth scopes governing access to this provider's APIs.

Attio Scopes

7 scopes · authorizationCode

7 scopes

SCOPES

Get Started 1

Portal, sign-up, and the first successful call

Signup

Signup

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

DomainSecurity

DomainSecurity

Authentication

Authentication

OAuthScopes

OAuthScopes

Commercial 1

Pricing, plans, and the legal terms of use

Pricing

Pricing

Company 2

The organization behind the API

LinkedIn

Website

Website

Other 1

Properties that don't map to a standard resource type

AgentCard

AgentCard

Source (apis.yml)

aid: attio
name: Attio
description: Attio is a modern, flexible, and data-driven customer relationship management (CRM) platform that lets revenue
  teams build a CRM around their unique data model with customizable objects, attributes, lists, and workflows. Attio syncs
  contacts and companies from email and calendar, enriches them with data, and powers reporting, sequences, and automations.
  The Attio REST API exposes full CRUD access to records, lists, objects, attributes, tasks, notes, threads, comments, and
  webhooks using Bearer token authentication and a public OpenAPI specification.
type: Index
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
- CRM
- Customer Relationship Management
- Sales
- Contacts
- Companies
- Pipeline
- Workflows
url: https://raw.githubusercontent.com/api-evangelist/attio/refs/heads/main/apis.yml
created: '2026-05-11'
modified: '2026-05-11'
specificationVersion: '0.19'
apis:
- aid: attio:rest-api
  name: Attio REST API
  description: Public REST API for the Attio CRM platform with full CRUD access to records, objects, attributes, lists, entries,
    tasks, notes, threads, comments, workspace members, and webhooks. Authentication uses a Bearer access token in the Authorization
    header and the API publishes a public OpenAPI specification.
  humanURL: https://docs.attio.com/rest-api
  baseURL: https://api.attio.com
  tags:
  - CRM
  - Sales
  - Contacts
  - Companies
  - Lists
  - Workflows
  properties:
  - type: Documentation
    url: https://docs.attio.com/rest-api
  - type: OpenAPI
    url: https://docs.attio.com/rest-api/endpoint-reference/openapi
  - type: Developer Platform
    url: https://attio.com/platform/developers
  - type: Authentication
    url: https://docs.attio.com/rest-api/how-to/authentication
common:
- type: AgentCard
  url: a2a/attio-a2a.yml
  name: A2A Agent Card
  description: Agent Card served at /.well-known/agent-card.json (flavored against A2A 1.0.0).
- type: AgenticAccess
  url: agentic-access/attio-agentic-access.yml
- type: DomainSecurity
  url: security/attio-domain-security.yml
- type: Authentication
  url: authentication/attio-authentication.yml
- type: OAuthScopes
  url: scopes/attio-scopes.yml
- type: GitHubOrganization
  url: https://github.com/attio
- type: LinkedIn
  url: https://www.linkedin.com/company/attio
- type: Website
  url: https://attio.com
- type: Documentation
  url: https://docs.attio.com
- type: Pricing
  url: https://attio.com/pricing
- type: Signup
  url: https://app.attio.com/welcome/sign-in
- type: LlmsText
  url: https://docs.attio.com/llms.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Attio

Kin Score

APIs 1

Attio REST API

Open Collections 1

Attio REST API

Security Posture 2

Attio Authentication

Attio Domain Security