# Zendesk Sell

**Canonical:** https://apis.io/providers/zendesk-sell/  
**Website:** https://www.zendesk.com/sell/  
**APIs profiled:** 4

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.

## Kin Score — 61.4 / 100 (strong)

Scored 2026-08-21 under rubric 0.12.0. Trend: flat (+0.0 from 61.4).

| Facet | Score |
|---|---|
| Discoverability | 92.6 |
| Contract Quality | 60.5 |
| Governance | 16.7 |
| Contract Governance | 16.7 |
| Operational Transparency | 73.7 |
| Developer Ergonomics | 73.2 |
| Commercial Clarity | 53.9 |
| Access Clarity | 53.9 |

## Agent readiness — 36.1 (agent-ready)

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

## Access

Requires approval — onboarding: approval, pricing: unknown, trial: no (confidence: medium).

## APIs (4)

- **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.

## MCP servers (1)

- **Zendesk Sell MCP Server**

## Agentic access (1)

- **Zendesk Sell Agentic Access** — 18 operations · 12 acting

## Security (4)

- **Zendesk Sell Authentication** — oauth2 · 1 scheme
- **Zendesk Sell Domain Security** — TLSv1.3 · HSTS · DMARC
- **Zendesk Sell Vulnerability Disclosure** — Bugcrowd · security.txt · contact published
- **Zendesk Sell Trust Center** — SOC 2 Type II, ISO 27001, ISO 27018, ISO 27701, CSA STAR, FedRAMP, HIPAA, GDPR, C5

## Plans (1)

- **Zendesk Sell Plans Pricing**

## Tags

CRM, Sales, Sales Automation, Leads, Deals, Pipeline, Customer Experience

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