Nutshell
Nutshell is a CRM and email marketing platform for small to mid-sized B2B sales teams, providing pipeline management, contact and company records, reporting, automation, and built-in email campaigns. The product unifies sales pipelines, activity tracking, and outbound communications in one workspace with mobile and desktop clients. Nutshell exposes a REST API for contacts, leads, accounts, activities, and pipelines, plus a legacy JSON-RPC API, both authenticated with an API key.
Limited machine-readable signal and partial portal coverage — documentation a human can read, but little a machine or agent can consume without scraping.
API Evangelist profiles Nutshell the way a machine reads it — 12 machine-readable artifacts across 7 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Nutshell scores 31.5/100 (thin), with a separate agent-readiness read of 41/100 (agent aware). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
How we profile Nutshell
Each block below is one kind of artifact we hold for Nutshell. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 7
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
Individual APIs this provider publishes, each with its own machine-readable definition.
Nutshell REST API
Resource-based REST API for managing contacts, leads, accounts, activities, pipelines, and tasks in Nutshell CRM. Authentication uses an API key generated from the Nutshell acco...
Nutshell Legacy JSON-RPC API
Legacy JSON-RPC API for accessing Nutshell CRM data, retained for backward compatibility with existing integrations.
Nutshell Accounts API
The Accounts API from Nutshell — 1 operation(s) for accounts.
Nutshell Activities API
The Activities API from Nutshell — 1 operation(s) for activities.
Nutshell Contacts API
The Contacts API from Nutshell — 1 operation(s) for contacts.
Nutshell Leads API
The Leads API from Nutshell — 1 operation(s) for leads.
Nutshell Pipelines API
The Pipelines API from Nutshell — 1 operation(s) for pipelines.
Scroll within the panel for all 7 ·
Open Collections 1
Open, tool-agnostic collections carry the same runnable value as Postman without locking you to one client — the portable, forkable form of the same exercise.
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
Nutshell REST API
OPEN COLLECTIONSecurity Posture 3
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.
Recommended x-agentic-access execution contracts for AI agents.
Resources
Every other property we hold for Nutshell — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Get Started 1
Portal, sign-up, and the first successful call
Documentation 1
Reference material describing how the API behaves
Agent Surfaces 2
MCP servers, agent skills, and machine-readable catalogs
Build 1
SDKs, sample code, and the tooling you integrate with
Access & Security 3
Authentication, authorization, and security posture
Operate 1
Status, limits, changes, and where to get help
Commercial 1
Pricing, plans, and the legal terms of use
Company 3
The organization behind the API
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