Nutshell
Nutshell is a CRM and email-marketing platform for small and mid-sized B2B sales teams, combining pipeline management, contact and company records, activity tracking, reporting, sales automation and built-in outbound email campaigns in one workspace with mobile and desktop clients. For developers Nutshell publishes a documented REST API of 112 operations across 24 resource families at app.nutshell.com/rest, an authenticated GraphQL endpoint, a legacy JSON-RPC API kept alive for existing integrations, an outbound webhook firehose, read-only SQL access on the Enterprise plan, and a remote, OAuth-protected MCP server at app.nutshell.com/mcp that exposes read-only CRM context to AI assistants.
Nutshell publishes 24 APIs on the APIs.io network, including Activities API, Audiences API, Competitors API, and 21 more. Tagged areas include CRM, Sales, Pipeline Management, Email Marketing, and Contact Management.
The Nutshell catalog on APIs.io includes 1 event-driven AsyncAPI specification.
Nutshell’s developer surface includes documentation, API reference, getting-started guide, quickstart, support, engineering blog, pricing, and 42 more developer resources.
Kin Score
APIs 26
Individual APIs this provider publishes, each with its own machine-readable definition.
Nutshell Legacy JSON-RPC API
Nutshell's original JSON-RPC API, available since 2010. Nutshell states it is no longer adding new endpoints to this API but continues to support existing customers, making it a...
Nutshell GraphQL API
A GraphQL endpoint served at https://app.nutshell.com/graphql. Nutshell's API authentication guide names GraphQL alongside REST and JSON-RPC as an authenticated surface. Introsp...
Nutshell Activities API
Meetings, calls and logged interactions attached to Nutshell records, plus the activity type reference. 5 operation(s) across 3 path(s).
Nutshell Audiences API
Email-marketing audiences — static lists of contacts used to organize people for marketing sends. 2 operation(s) across 1 path(s).
Nutshell Competitors API
Competitor records and the lead-to-competitor relationships (competitor maps) attached to a lead. 6 operation(s) across 4 path(s).
Nutshell Editions API
Marketing email editions — individual email sends and their metadata. 2 operation(s) across 2 path(s).
Nutshell Emails API
Individual email messages recorded against Nutshell records. 1 operation(s) across 1 path(s).
Nutshell Forms API
Nutshell Forms and their fields, including the field IDs used in each published form. 3 operation(s) across 3 path(s).
Nutshell Industries API
The industry reference list used to classify accounts. 1 operation(s) across 1 path(s).
Nutshell Invoices API
Invoice documents, their status transitions and payment/completion metadata. 3 operation(s) across 3 path(s).
Nutshell Leads API
Sales opportunities: create, read, update, close, reopen, watch, stage and stageset assignment, installments, reports and lead custom fields. 25 operation(s) across 19 path(s).
Nutshell Markets API
Market records used to segment Nutshell data. 2 operation(s) across 2 path(s).
Nutshell Notes API
Free-text notes attached to accounts, contacts and leads, with delete and undelete. 5 operation(s) across 3 path(s).
Nutshell Products API
The product catalog and product maps — instances of a product attached to a lead with quantity and custom pricing. 8 operation(s) across 6 path(s).
Nutshell Quotes API
Quote documents, their status transitions, and creating an invoice from a quote. 4 operation(s) across 4 path(s).
Nutshell Sources API
Lead sources — how leads arrive at your website and learn about your business. 4 operation(s) across 3 path(s).
Nutshell Tags API
Tags used to group leads, contacts and accounts, with delete and undelete. 4 operation(s) across 3 path(s).
Nutshell Tasks API
Tasks assigned to Nutshell users, including assignee updates. 5 operation(s) across 2 path(s).
Nutshell Territories API
Sales territories used to scope ownership of Nutshell records. 1 operation(s) across 1 path(s).
Nutshell Users API
Nutshell users in the instance. 2 operation(s) across 2 path(s).
Nutshell Accounts (Companies) API
The Accounts (Companies) API from Nutshell — 10 operation(s) for accounts (companies).
Nutshell Contacts (People) API
The Contacts (People) API from Nutshell — 8 operation(s) for contacts (people).
Nutshell Events (Timeline) API
The Events (Timeline) API from Nutshell — 2 operation(s) for events (timeline).
Nutshell Filter API
The Filter API from Nutshell — 1 operation(s) for filter.
Nutshell Product Categories API
The ProductCategories API from Nutshell — 2 operation(s) for productcategories.
Nutshell Stagesets (Pipelines) API
The Stagesets (Pipelines) API from Nutshell — 3 operation(s) for stagesets (pipelines).
Scroll for all 26
Open Collections 24
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
Nutshell Accounts (Companies) API
OPEN COLLECTIONNutshell Activities API
OPEN COLLECTIONNutshell Audiences API
OPEN COLLECTIONNutshell Competitors API
OPEN COLLECTIONNutshell Contacts (People) API
OPEN COLLECTIONNutshell Editions API
OPEN COLLECTIONNutshell Emails API
OPEN COLLECTIONNutshell Events (Timeline) API
OPEN COLLECTIONNutshell Filter API
OPEN COLLECTIONNutshell Forms API
OPEN COLLECTIONNutshell Industries API
OPEN COLLECTIONNutshell Invoices API
OPEN COLLECTIONNutshell Leads API
OPEN COLLECTIONNutshell Markets API
OPEN COLLECTIONNutshell Notes API
OPEN COLLECTIONNutshell Stagesets (Pipelines) API
OPEN COLLECTIONNutshell ProductCategories API
OPEN COLLECTIONNutshell Products API
OPEN COLLECTIONNutshell Quotes API
OPEN COLLECTIONNutshell Sources API
OPEN COLLECTIONNutshell Tags API
OPEN COLLECTIONNutshell Tasks API
OPEN COLLECTIONNutshell Territories API
OPEN COLLECTIONNutshell Users API
OPEN COLLECTIONScroll for all 24
MCP Servers 1
Model Context Protocol servers that expose these APIs to AI agents.
Nutshell MCP server
MCP SERVERPricing Plans 1
Published pricing tiers and plan structures.
Rate Limits 1
Documented rate limits and quota policies.
Nutshell Rate Limits
RATE LIMITSEvent Specifications 1
AsyncAPI definitions for this provider's event-driven and streaming APIs.
Nutshell Webhooks
ASYNCAPISecurity Posture 3
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Scopes 1
OAuth scopes governing access to this provider's APIs.
Agentic Access 1
Recommended x-agentic-access execution contracts for AI agents.
Resources
Get Started 6
Portal, sign-up, and the first successful call
Documentation 2
Reference material describing how the API behaves
Agent Surfaces 6
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 7
Pagination, idempotency, versioning, errors, and events
Scroll for all 7
Build 4
SDKs, sample code, and the tooling you integrate with
Access & Security 5
Authentication, authorization, and security posture
Operate 5
Status, limits, changes, and where to get help
Commercial 4
Pricing, plans, and the legal terms of use
Company 4
The organization behind the API
Other 6
Properties that don't map to a standard resource type
Source (apis.yml)
Work with this as data
Every provider here is available over the APIs.io API and to AI agents over MCP.