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

58.9/100 strong ▬ flat Agent 29/100 agent ready saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessApproval

1 APIs

CRM Sales Sales Automation Leads Deals Pipeline Customer Experience

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 58.9/100 · strong

Contract Quality 13.3 / 23

Developer Ergonomics 13.4 / 18

Access Clarity 9.7 / 18

Operational Transparency 8.6 / 12

Contract Governance 0.5 / 11

Discoverability 6.2 / 9

Create-or-Update Ergonomics 2.2 / 10

Agent readiness — 29/100 · 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 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 6 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. 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. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 4

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

Zendesk Sell (Sales CRM) API

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...

Zendesk Sell Contacts API

Individual people and organizations.

Zendesk Sell Deals API

Sales opportunities moving through pipeline stages.

Zendesk Sell Leads API

Pre-qualified sales prospects.

Open Collections 5

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Zendesk Sell (Sales CRM) Contacts API

OPEN COLLECTION

Zendesk Sell (Sales CRM) Contacts Deals API

OPEN COLLECTION

Zendesk Sell (Sales CRM) Contacts Leads API

OPEN COLLECTION

Zendesk Sell (Sales CRM) API

OPEN COLLECTION

GraphQL 1

GraphQL schemas published by this provider.

Zendesk Sell GraphQL Schema

This directory contains a conceptual GraphQL schema for the Zendesk Sell (formerly Base CRM) Sales CRM API. The schema is derived from the [Zendesk Sell REST API reference](http...

GRAPHQL

Pricing Plans 1

Published pricing tiers and plan structures.

Zendesk Sell Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Zendesk Sell Rate Limits

1 limits

RATE LIMITS

Security Posture 4

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Zendesk Sell Authentication

oauth2 · 1 scheme

SECURITY

Zendesk Sell Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Zendesk Sell Vulnerability Disclosure

Bugcrowd · security.txt · contact published

SECURITY

Zendesk Sell Trust Center

SOC 2 Type II, ISO 27001, ISO 27018, ISO 27701, CSA STAR, FedRAMP, HIPAA, GDPR, C5

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Zendesk Sell Scopes

3 scopes · authorizationCode/implicit/password

3 scopes

SCOPES

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Zendesk Sell Agentic Access

18 operations · 12 acting

AGENTIC

Resources

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

AgenticAccess

WellKnown

WellKnown

X-MCPServerCandidate

X-MCPServerCandidate

LLMsTxt

LLMsTxt

AgentSkill

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
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
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: X-MCPServerCandidate
  url: mcp/zendesk-sell-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- 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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