Zendesk Sell

Zendesk Sell (formerly Base CRM) is a sales CRM platform that helps sales teams manage leads, contacts, deals, and pipelines while integrating with the broader Zendesk customer experience suite. The platform offers pipeline analytics, email and call tracking, mobile apps, and territory management for high-velocity sales organizations. The Sell API is a RESTful API authenticated via OAuth 2.0 (authorization code, implicit, password, and refresh token grants) at the api.getbase.com host that provides full CRUD access to leads, contacts, deals, accounts, notes, tasks, calls, and custom fields, alongside a premium Sync API, a client-pulled Firehose change stream and a Search API. Zendesk announced on 2025-09-09 that Sell is being retired on 2027-08-31 and is no longer sold as a standalone plan, so the API carries a hard end date.

Zendesk Sell publishes 4 APIs on the APIs.io network, including (Sales CRM) API, Contacts API, Deals API, and 1 more. Tagged areas include CRM, Sales, Sales Automation, Leads, and Deals.

Zendesk Sell’s developer surface includes authentication, documentation, API reference, pricing, signup flow, support, getting-started guide, and 33 more developer resources.

🌐 Visit website 📡 Source on GitHub

61.4/100 strong ▬ flat Agent 36/100 agent ready Full breakdown ↓
scored 2026-08-21 · rubric v0.12.0

AccessApproval

4 APIs 1 MCP Servers

CRM Sales Sales Automation Leads Deals Pipeline Customer Experience

Kin Score

Kin Score How this is scored →
scored 2026-08-21 · rubric v0.12.0

Composite quality — 61.4/100 · strong

Contract Quality 15.1 / 25

Developer Ergonomics 14.6 / 20

Access Clarity 10.8 / 20

Operational Transparency 9.6 / 13

Contract Governance 2.0 / 12

Discoverability 9.3 / 10

Agent readiness — 36/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 3 / 3

A2A Agent Card 0 / 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/zendesk-sell: 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 4

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

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Zendesk Sell MCP Server

MCP SERVER

GraphQL 1

GraphQL schemas published by this provider.

Rate Limits 1

Documented rate limits and quota policies.

Scopes 1

OAuth scopes governing access to this provider's APIs.

Zendesk Sell Scopes

3 scopes · authorizationCode/implicit/password

3 scopes

SCOPES

Get Started 4

Portal, sign-up, and the first successful call

Signup

Signup

Login

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

WellKnown

MCPServer

LLMsTxt

AgentSkill

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conformance

ErrorCatalog

Lifecycle

Conventions

DataModel

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

Packages

SDKs

CLI

Access & Security 8

Authentication, authorization, and security posture

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

Authentication

OAuthScopes

SecurityTxt

Compliance

TrustCenter

Security

Scroll for all 8

Operate 5

Status, limits, changes, and where to get help

Support

StatusPage

Deprecation

ChangeLog

RateLimits

Commercial 4

Pricing, plans, and the legal terms of use

Pricing

TermsOfService

PrivacyPolicy

Plans

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

EventTypes

EventTypes

Source (apis.yml)

aid: zendesk-sell
name: Zendesk Sell
description: Zendesk Sell (formerly Base CRM) is a sales CRM platform that helps sales teams manage leads, contacts, deals,
  and pipelines while integrating with the broader Zendesk customer experience suite. The platform offers pipeline analytics,
  email and call tracking, mobile apps, and territory management for high-velocity sales organizations. The Sell API is a
  RESTful API authenticated via OAuth 2.0 (authorization code, implicit, password, and refresh token grants) at the api.getbase.com
  host that provides full CRUD access to leads, contacts, deals, accounts, notes, tasks, calls, and custom fields, alongside
  a premium Sync API, a client-pulled Firehose change stream and a Search API. Zendesk announced on 2025-09-09 that Sell is
  being retired on 2027-08-31 and is no longer sold as a standalone plan, so the API carries a hard end date.
type: Index
accessModel:
  pricing: unknown
  onboarding: approval
  trial: false
  try_now: false
  public: false
  label: Requires approval
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/zendesk-sell.png
tags:
- CRM
- Sales
- Sales Automation
- Leads
- Deals
- Pipeline
- Customer Experience
url: https://raw.githubusercontent.com/api-evangelist/zendesk-sell/refs/heads/main/apis.yml
created: '2026-05-11'
modified: '2026-08-13'
specificationVersion: '0.23'
apis:
- aid: zendesk-sell:sales-crm-api
  name: Zendesk Sell (Sales CRM) API
  description: OAuth 2.0-authenticated REST API for managing leads, contacts, deals, accounts, notes, tasks, calls, sources,
    stages, pipelines, and custom fields in Zendesk Sell. Bearer access tokens are passed in the Authorization header against
    the api.getbase.com host.
  humanURL: https://developer.zendesk.com/api-reference/sales-crm/introduction/
  baseURL: https://api.getbase.com
  tags:
  - CRM
  - Sales
  - Leads
  - Contacts
  - Deals
  - Pipeline
  properties:
  - type: Documentation
    url: https://developer.zendesk.com/api-reference/sales-crm/introduction/
  - type: Authentication
    url: https://developer.zendesk.com/api-reference/sales-crm/authentication/introduction/
  - type: OAuth Reference
    url: https://developer.zendesk.com/api-reference/sales-crm/authentication/reference/
  - url: graphql/zendesk-sell-graphql.md
    type: GraphQL
  - type: RateLimits
    url: https://developer.zendesk.com/api-reference/sales-crm/rate-limits/
  - type: Errors
    url: https://developer.zendesk.com/api-reference/sales-crm/errors/
  - type: PostmanCollection
    url: collections/zendesk-sell.postman_collection.json
- aid: zendesk-sell:zendesk-sell-contacts-api
  name: Zendesk Sell Contacts API
  description: Individual people and organizations.
  humanURL: https://developer.zendesk.com/api-reference/sales-crm/introduction/
  baseURL: https://api.getbase.com
  tags:
  - Contacts
  properties:
  - type: OpenAPI
    url: openapi/zendesk-sell-contacts-api-openapi.yml
  - type: Overlay
    url: overlays/zendesk-sell-contacts-api-overlay.yaml
  - type: PostmanCollection
    url: collections/zendesk-sell-contacts-api.postman_collection.json
- aid: zendesk-sell:zendesk-sell-deals-api
  name: Zendesk Sell Deals API
  description: Sales opportunities moving through pipeline stages.
  humanURL: https://developer.zendesk.com/api-reference/sales-crm/introduction/
  baseURL: https://api.getbase.com
  tags:
  - Deals
  properties:
  - type: OpenAPI
    url: openapi/zendesk-sell-deals-api-openapi.yml
  - type: Overlay
    url: overlays/zendesk-sell-deals-api-overlay.yaml
  - type: PostmanCollection
    url: collections/zendesk-sell-deals-api.postman_collection.json
- aid: zendesk-sell:zendesk-sell-leads-api
  name: Zendesk Sell Leads API
  description: Pre-qualified sales prospects.
  humanURL: https://developer.zendesk.com/api-reference/sales-crm/introduction/
  baseURL: https://api.getbase.com
  tags:
  - Leads
  properties:
  - type: OpenAPI
    url: openapi/zendesk-sell-leads-api-openapi.yml
  - type: Overlay
    url: overlays/zendesk-sell-leads-api-overlay.yaml
  - type: PostmanCollection
    url: collections/zendesk-sell-leads-api.postman_collection.json
common:
- type: AgenticAccess
  url: agentic-access/zendesk-sell-agentic-access.yml
- type: VulnerabilityDisclosure
  url: security/zendesk-sell-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/zendesk-sell-domain-security.yml
- type: Authentication
  url: authentication/zendesk-sell-authentication.yml
- type: OAuthScopes
  url: scopes/zendesk-sell-scopes.yml
- type: Website
  url: https://www.zendesk.com/sell/
- type: Documentation
  url: https://developer.zendesk.com/api-reference/sales-crm/introduction/
- type: APIReference
  url: https://developer.zendesk.com/api-reference/
- type: Pricing
  url: https://www.zendesk.com/pricing/
- type: Signup
  url: https://www.zendesk.com/register/
- type: Login
  url: https://www.zendesk.com/login/
- type: Support
  url: https://support.zendesk.com/
- type: GitHubOrganization
  url: https://github.com/zendesk
- type: DeveloperPortal
  url: https://developer.zendesk.com/
- type: GettingStarted
  url: https://developer.zendesk.com/documentation/sales-crm/first-call/
- type: Blog
  url: https://www.zendesk.com/blog/
- type: TermsOfService
  url: https://www.zendesk.com/company/agreements-and-terms/zendesk-customer-agreement/
- type: PrivacyPolicy
  url: https://www.zendesk.com/company/agreements-and-terms/privacy-notice/
- type: Packages
  url: packages/zendesk-sell-packages.yml
- type: SDKs
  url: packages/zendesk-sell-packages.yml
- type: WellKnown
  url: well-known/zendesk-sell-well-known.yml
- type: SecurityTxt
  url: well-known/zendesk-sell-security.txt
- type: MCPServer
  url: mcp/zendesk-sell-mcp.yml
- type: LLMsTxt
  url: llms/zendesk-sell-llms.txt
- type: Conformance
  url: conformance/zendesk-sell-conformance.yml
- type: Compliance
  url: https://www.zendesk.com/trust-center/
- type: TrustCenter
  url: security/zendesk-sell-trust-center.yml
- type: Security
  url: https://www.zendesk.com/company/policies-and-guidelines/responsible-disclosure-policy/
- type: ErrorCatalog
  url: errors/zendesk-sell-problem-types.yml
- type: Lifecycle
  url: lifecycle/zendesk-sell-lifecycle.yml
- type: StatusPage
  url: https://status.zendesk.com/
- type: Deprecation
  url: https://support.zendesk.com/hc/en-us/articles/9591462550042-Announcing-the-retiring-of-Zendesk-Sell
- type: Conventions
  url: conventions/zendesk-sell-conventions.yml
- type: ChangeLog
  url: changelog/zendesk-sell-changelog.yml
- type: CLI
  url: cli/zendesk-sell-cli.yml
- type: DataModel
  url: data-model/zendesk-sell-data-model.yml
- type: RateLimits
  url: rate-limits/zendesk-sell-rate-limits.yml
- type: Plans
  url: plans/zendesk-sell-plans-pricing.yml
- type: EventTypes
  url: events/zendesk-sell-events.yml
- type: AgentSkill
  url: skills/_index.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
x-enrichment:
  date: '2026-08-13'
  status: enriched
  artifacts_added: 23
  pass: local-v1

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