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 26 API contracts indexed on the APIs.io network, including Activities API, Audiences API, Competitors API, and 23 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 and 1 Spectral governance ruleset.

Nutshell’s developer surface includes documentation, API reference, getting-started guide, quickstart, support, engineering blog, pricing, and 43 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

69.2/100 exemplar ▲ 5.3 Agent 52/100 agent ready Front door AI 5/6 prominent Heartbeat 50/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessPaid

7 published contracts 1 MCP Servers 5 Agent Skills

CRM Sales Pipeline Management Email Marketing Contact Management Sales Automation Lead Management Marketing Automation MCP B2B

What this lets a business do 3

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Sales Management

BC-410

LeadsQuotesStagesets (Pipelines)

GET /leads/{id} PATCH /leads/{id} GET /leads GET /stages

Customer Relationship Management

BC-420

Accounts (Companies)Contacts (People)

GET /contacts/{id} GET /contacts/{id}/customfields GET /contacts POST /contacts

Financial Management

BC-200

Invoices

GET /invoices/{id} POST /invoices/{id}/status GET /invoices

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 69.2/100 · exemplar

Contract Quality 11.1 / 19

Developer Ergonomics 11.0 / 15

Access Clarity 15.0 / 15

Operational Transparency 3.7 / 10

Contract Governance 2.9 / 9

Discoverability 6.0 / 8

Regulatory Posture 5.9 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 52/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 6 / 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 5 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 0 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

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.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too
Pagination +5 pts — share of collection GETs (an array, or one wrapped in data/items/results ...) that declare a page/limit/offset/cursor parameter, a Link header or a next/cursor field; na with no collection GETs
Agentic Commerce Well-Known Document +5 pts — a parsing /.well-known/ucp.json or acp.json declaring a version and at least one service, OR (0.27) a live x402 payment challenge from _data/x402-adoption.json — `self` when its endpoints are on the provider's own domain, `platform` when they are on a vendor's
Dry-Run / Simulate Mode +4 pts — OpenAPI: destructive operations expose a dry_run / simulate / preview / validate_only parameter

2 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 59.4 — up to +10.2 composite points
Contract Governance scores 31.8 — up to +8.2 composite points
Operational Transparency scores 38.2 — up to +8.0 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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 the provider profile at artifacts.apis.io/nutshell/apis.yml: open an issue on github.com/api-evangelist/nutshell to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Zoom App Marketplace and Partner Ecosystem (builders and partners on Zoom)	builds-on	29.6	-	-
Intercom App Store (customer-support, chat and messaging integrations)	builds-on	29.6	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 5

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

Model Context Protocol (MCP)

measured — observed by APIs.io (verified)

OAuth 2.0 Protected Resource Metadata

measured — observed by APIs.io (verified)

Dynamic Client Registration

measured — observed by APIs.io (published)

OpenAPI

measured — observed by APIs.io (published)

OAuth 2.0

measured — observed by APIs.io (declared)

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 Stagesets (Pipelines) API

The Stagesets (Pipelines) API from Nutshell — 3 operation(s) for stagesets (pipelines).

Nutshell Product Categories API

ProductCategories

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Open Collections 24

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

Nutshell Accounts (Companies) API

OPEN COLLECTION

Nutshell Activities API

OPEN COLLECTION

Nutshell Audiences API

OPEN COLLECTION

Nutshell Competitors API

OPEN COLLECTION

Nutshell Contacts (People) API

OPEN COLLECTION

Nutshell Editions API

OPEN COLLECTION

Nutshell Emails API

OPEN COLLECTION

Nutshell Events (Timeline) API

OPEN COLLECTION

Nutshell Filter API

OPEN COLLECTION

Nutshell Forms API

OPEN COLLECTION

Nutshell Industries API

OPEN COLLECTION

Nutshell Invoices API

OPEN COLLECTION

Nutshell Leads API

OPEN COLLECTION

Nutshell Markets API

OPEN COLLECTION

Nutshell Notes API

OPEN COLLECTION

Nutshell Stagesets (Pipelines) API

OPEN COLLECTION

Nutshell ProductCategories API

OPEN COLLECTION

Nutshell Products API

OPEN COLLECTION

Nutshell Quotes API

OPEN COLLECTION

Nutshell Sources API

OPEN COLLECTION

Nutshell Tags API

OPEN COLLECTION

Nutshell Tasks API

OPEN COLLECTION

Nutshell Territories API

OPEN COLLECTION

Nutshell Users API

OPEN COLLECTION

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MCP Servers 1

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

Nutshell MCP server

Remote MCP server at app.nutshell.com over streamable HTTP requiring OAuth.

MCP SERVER

Agent Skills 5

Packaged agent skills for driving this provider's APIs from an AI assistant.

nutshell-advance-lead-through-pipeline

AGENT SKILL

nutshell-capture-inbound-lead

AGENT SKILL

nutshell-price-a-lead-with-products

AGENT SKILL

nutshell-quote-to-invoice

AGENT SKILL

nutshell-sync-crm-changes

AGENT SKILL

Nutshell API pricing

Prices published by Nutshell, read 2026-10-28 from www.nutshell.com/pricing.

Plan	Price
Foundation	$13 per user Includes: 10 AI outcomes, 2 hrs saved/mo, Unlimited contacts & storage, Email & calendar sync, AI Chatbot, For
Growth	$25 per user Includes: Everything in Foundation, + 20 AI outcomes, 4 hrs saved/mo, Activity reports, Sales quotas, Lead ass
Pro (Most popular)	$42 per user Includes: Everything in Growth, + 40 AI outcomes, 8 hrs saved/mo, 5 custom pipelines, Advanced reporting, Sale
Business (Best value)	$59 per user Includes: Everything in Pro, + 100 AI outcomes, 20 hrs saved/mo, 10 custom pipelines, Advanced meeting schedul
Enterprise tier	$79 per user Includes: Everything in Business, + 150 AI outcomes, 30 hrs saved/mo, Unlimited pipelines, Unlimited custom fi
Marketing add-on	$49/ month Includes: Advanced email marketing reporting, AI email campaign and landing page builder, A/B testing, SMS Mar
Engagement add-on	$16 per user/ month Includes: Two-way SMS, unified inbox, WhatsApp/Messenger/Instagram integrations
Email marketing add-on	$5/ month Includes: Priced by marketing contacts (e.g. 1,000 contacts costs $25/month and includes 8,000 email sends); 1

All 11 plans, limits and sources →

Billed by: user · FinOps profile →

Pricing Plans 2

Published pricing tiers and plan structures.

Nutshell Plans Pricing

11 plans

PLANS

Nutshell Price Estimates

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Nutshell Rate Limits

0 limits

RATE LIMITS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Nutshell

SLA

FinOps 1

Cost, billing, and metering signals for API financial operations.

Nutshell Finops

FINOPS

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Nutshell Webhooks

ASYNCAPI

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Nutshell API Rules

49 rules · 36 errors 11 warnings 2 info

SPECTRAL

OpenAPI Overlays 24

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Nutshell Accounts Overlay

4 actions · update · nutshell-accounts-api-openapi.yml

DERIVED

Nutshell Activities Overlay

4 actions · update · nutshell-activities-api-openapi.yml

DERIVED

Nutshell Audiences Overlay

4 actions · update · nutshell-audiences-api-openapi.yml

DERIVED

Nutshell Competitors Overlay

4 actions · update · nutshell-competitors-api-openapi.yml

DERIVED

Nutshell Contacts Overlay

4 actions · update · nutshell-contacts-api-openapi.yml

DERIVED

Nutshell Editions Overlay

4 actions · update · nutshell-editions-api-openapi.yml

DERIVED

Nutshell Emails Overlay

4 actions · update · nutshell-emails-api-openapi.yml

DERIVED

Nutshell Events Overlay

4 actions · update · nutshell-events-api-openapi.yml

DERIVED

Nutshell Filters Overlay

4 actions · update · nutshell-filters-api-openapi.yml

DERIVED

Nutshell Forms Overlay

4 actions · update · nutshell-forms-api-openapi.yml

DERIVED

Nutshell Industries Overlay

4 actions · update · nutshell-industries-api-openapi.yml

DERIVED

Nutshell Invoices Overlay

4 actions · update · nutshell-invoices-api-openapi.yml

DERIVED

Nutshell Leads Overlay

4 actions · update · nutshell-leads-api-openapi.yml

DERIVED

Nutshell Markets Overlay

4 actions · update · nutshell-markets-api-openapi.yml

DERIVED

Nutshell Notes Overlay

4 actions · update · nutshell-notes-api-openapi.yml

DERIVED

Nutshell Pipelines Overlay

4 actions · update · nutshell-pipelines-api-openapi.yml

DERIVED

Nutshell Product Categories Overlay

4 actions · update · nutshell-product-categories-api-openapi.yml

DERIVED

Nutshell Products Overlay

4 actions · update · nutshell-products-api-openapi.yml

DERIVED

Nutshell Quotes Overlay

4 actions · update · nutshell-quotes-api-openapi.yml

DERIVED

Nutshell Sources Overlay

4 actions · update · nutshell-sources-api-openapi.yml

DERIVED

Nutshell Tags Overlay

4 actions · update · nutshell-tags-api-openapi.yml

DERIVED

Nutshell Tasks Overlay

4 actions · update · nutshell-tasks-api-openapi.yml

DERIVED

Nutshell Territories Overlay

4 actions · update · nutshell-territories-api-openapi.yml

DERIVED

Nutshell Users Overlay

4 actions · update · nutshell-users-api-openapi.yml

DERIVED

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Security Posture 3

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

Nutshell Authentication

http/oauth2 · 2 schemes

SECURITY

Nutshell Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Nutshell Trust Center

SOC 2, GDPR

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Nutshell Scopes

2 scopes

SCOPES

Agentic Access 1

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

Nutshell Agentic Access

116 operations · 47 acting

AGENTIC

Resources

Get Started 6

Portal, sign-up, and the first successful call

DeveloperPortal

GettingStarted

Quickstart

SignUp

Login

Sandbox

Sandbox

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 6

MCP servers, agent skills, and machine-readable catalogs

LlmsText

LLMsTxt

AgenticAccess

WellKnown

MCPServer

AgentSkill

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Webhooks

Conformance

ErrorCatalog

Lifecycle

Conventions

DataModel

Webhooks

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Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

Packages

SDKs

ToolCrosswalk

Access & Security 5

Authentication, authorization, and security posture

Compliance

Authentication

OAuthScopes

DomainSecurity

TrustCenter

Operate 5

Status, limits, changes, and where to get help

Support

HelpCenter

StatusPage

ChangeLog

RateLimits

Commercial 4

Pricing, plans, and the legal terms of use

Pricing

TermsOfService

PrivacyPolicy

Plans

Company 4

The organization behind the API

Website

Website

Blog

Blog

BlogRSS

BlogRSS

LinkedIn

Other 7

Properties that don't map to a standard resource type

CapabilityMap

Overlay

Overlay

Overlay

Overlay

Overlay

Overlay

Scroll for all 7

Source (apis.yml)

aid: nutshell
name: Nutshell
description: 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.
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: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: high
  source:
  - plans
  - authentication
  - scopes
  - rate-limits
  - security
  - sandbox
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/nutshell.png
x-docs-platform: readme
x-docs-platform-confidence: high
x-docs-platform-checked: 2026-10-04
tags:
- CRM
- Sales
- Pipeline Management
- Email Marketing
- Contact Management
- Sales Automation
- Lead Management
- Marketing Automation
- MCP
- B2B
url: https://raw.githubusercontent.com/api-evangelist/nutshell/refs/heads/main/apis.yml
created: '2026-05-11'
modified: '2026-08-13'
specificationVersion: '0.23'
apis:
- aid: nutshell:json-rpc
  name: Nutshell Legacy JSON-RPC API
  description: 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 maintenance-only surface. Same HTTP Basic authentication
    as the REST API.
  humanURL: https://developers-rpc.nutshell.com
  baseURL: https://app.nutshell.com/api/v1/json
  tags:
  - JSON-RPC
  - CRM
  - Legacy
  properties:
  - type: Documentation
    url: https://developers-rpc.nutshell.com
  - type: GettingStarted
    url: https://developers.nutshell.com/docs/get-started-with-the-json-rpc-api
  - type: GitHub SDK
    url: https://github.com/nutshellcrm/nutshell-api-php
- aid: nutshell:graphql
  name: Nutshell GraphQL API
  description: '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. Introspection is gated: an anonymous POST returns HTTP
    401, so no SDL could be captured and no schema is claimed here.'
  humanURL: https://developers.nutshell.com/docs/api-authentication
  baseURL: https://app.nutshell.com/graphql
  tags:
  - GraphQL
  - CRM
  properties:
  - type: Documentation
    url: https://developers.nutshell.com/docs/api-authentication
- aid: nutshell:nutshell-activities-api
  name: Nutshell Activities API
  description: Meetings, calls and logged interactions attached to Nutshell records, plus the activity type reference. 5 operation(s)
    across 3 path(s).
  humanURL: https://developers.nutshell.com/reference
  baseURL: https://app.nutshell.com/rest
  tags:
  - Activities
  - CRM
  properties:
  - type: OpenAPI
    url: openapi/nutshell-activities-api-openapi.yml
  - type: Overlay
    url: overlays/nutshell-activities-overlay.yaml
  - type: APIReference
    url: https://developers.nutshell.com/reference
- aid: nutshell:nutshell-audiences-api
  name: Nutshell Audiences API
  description: Email-marketing audiences — static lists of contacts used to organize people for marketing sends. 2 operation(s)
    across 1 path(s).
  humanURL: https://developers.nutshell.com/reference
  baseURL: https://app.nutshell.com/rest
  tags:
  - Audiences
  - Email Marketing
  properties:
  - type: OpenAPI
    url: openapi/nutshell-audiences-api-openapi.yml
  - type: Overlay
    url: overlays/nutshell-audiences-overlay.yaml
  - type: APIReference
    url: https://developers.nutshell.com/reference
- aid: nutshell:nutshell-competitors-api
  name: Nutshell Competitors API
  description: Competitor records and the lead-to-competitor relationships (competitor maps) attached to a lead. 6 operation(s)
    across 4 path(s).
  humanURL: https://developers.nutshell.com/reference
  baseURL: https://app.nutshell.com/rest
  tags:
  - Competitors
  - Sales
  properties:
  - type: OpenAPI
    url: openapi/nutshell-competitors-api-openapi.yml
  - type: Overlay
    url: overlays/nutshell-competitors-overlay.yaml
  - type: APIReference
    url: https://developers.nutshell.com/reference
- aid: nutshell:nutshell-editions-api
  name: Nutshell Editions API
  description: Marketing email editions — individual email sends and their metadata. 2 operation(s) across 2 path(s).
  humanURL: https://developers.nutshell.com/reference
  baseURL: https://app.nutshell.com/rest
  tags:
  - Editions
  - Email Marketing
  properties:
  - type: OpenAPI
    url: openapi/nutshell-editions-api-openapi.yml
  - type: Overlay
    url: overlays/nutshell-editions-overlay.yaml
  - type: APIReference
    url: https://developers.nutshell.com/reference
- aid: nutshell:nutshell-emails-api
  name: Nutshell Emails API
  description: Individual email messages recorded against Nutshell records. 1 operation(s) across 1 path(s).
  humanURL: https://developers.nutshell.com/reference
  baseURL: https://app.nutshell.com/rest
  tags:
  - Email
  tags_raw:
  - Emails
  - Email
  properties:
  - type: OpenAPI
    url: openapi/nutshell-emails-api-openapi.yml
  - type: Overlay
    url: overlays/nutshell-emails-overlay.yaml
  - type: APIReference
    url: https://developers.nutshell.com/reference
- aid: nutshell:nutshell-forms-api
  name: Nutshell Forms API
  description: Nutshell Forms and their fields, including the field IDs used in each published form. 3 operation(s) across
    3 path(s).
  humanURL: https://developers.nutshell.com/reference
  baseURL: https://app.nutshell.com/rest
  tags:
  - Forms
  - Lead Capture
  properties:
  - type: OpenAPI
    url: openapi/nutshell-forms-api-openapi.yml
  - type: Overlay
    url: overlays/nutshell-forms-overlay.yaml
  - type: APIReference
    url: https://developers.nutshell.com/reference
- aid: nutshell:nutshell-industries-api
  name: Nutshell Industries API
  description: The industry reference list used to classify accounts. 1 operation(s) across 1 path(s).
  humanURL: https://developers.nutshell.com/reference
  baseURL: https://app.nutshell.com/rest
  tags:
  - Industries
  - Reference Data
  properties:
  - type: OpenAPI
    url: openapi/nutshell-industries-api-openapi.yml
  - type: Overlay
    url: overlays/nutshell-industries-overlay.yaml
  - type: APIReference
    url: https://developers.nutshell.com/reference
- aid: nutshell:nutshell-invoices-api
  name: Nutshell Invoices API
  description: Invoice documents, their status transitions and payment/completion metadata. 3 operation(s) across 3 path(s).
  humanURL: https://developers.nutshell.com/reference
  baseURL: https://app.nutshell.com/rest
  tags:
  - Invoices
  - Billing
  properties:
  - type: OpenAPI
    url: openapi/nutshell-invoices-api-openapi.yml
  - type: Overlay
    url: overlays/nutshell-invoices-overlay.yaml
  - type: APIReference
    url: https://developers.nutshell.com/reference
- aid: nutshell:nutshell-leads-api
  name: Nutshell Leads API
  description: '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).'
  humanURL: https://developers.nutshell.com/reference
  baseURL: https://app.nutshell.com/rest
  tags:
  - Leads
  - Opportunities
  - Pipeline Management
  properties:
  - type: OpenAPI
    url: openapi/nutshell-leads-api-openapi.yml
  - type: Overlay
    url: overlays/nutshell-leads-overlay.yaml
  - type: APIReference
    url: https://developers.nutshell.com/reference
- aid: nutshell:nutshell-markets-api
  name: Nutshell Markets API
  description: Market records used to segment Nutshell data. 2 operation(s) across 2 path(s).
  humanURL: https://developers.nutshell.com/reference
  baseURL: https://app.nutshell.com/rest
  tags:
  - Markets
  - Segmentation
  properties:
  - type: OpenAPI
    url: openapi/nutshell-markets-api-openapi.yml
  - type: Overlay
    url: overlays/nutshell-markets-overlay.yaml
  - type: APIReference
    url: https://developers.nutshell.com/reference
- aid: nutshell:nutshell-notes-api
  name: Nutshell Notes API
  description: Free-text notes attached to accounts, contacts and leads, with delete and undelete. 5 operation(s) across 3
    path(s).
  humanURL: https://developers.nutshell.com/reference
  baseURL: https://app.nutshell.com/rest
  tags:
  - Notes
  - CRM
  properties:
  - type: OpenAPI
    url: openapi/nutshell-notes-api-openapi.yml
  - type: Overlay
    url: overlays/nutshell-notes-overlay.yaml
  - type: APIReference
    url: https://developers.nutshell.com/reference
- aid: nutshell:nutshell-products-api
  name: Nutshell Products API
  description: 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).
  humanURL: https://developers.nutshell.com/reference
  baseURL: https://app.nutshell.com/rest
  tags:
  - Product
  - Catalog
  tags_raw:
  - Products
  - Catalog
  properties:
  - type: OpenAPI
    url: openapi/nutshell-products-api-openapi.yml
  - type: Overlay
    url: overlays/nutshell-products-overlay.yaml
  - type: APIReference
    url: https://developers.nutshell.com/reference
- aid: nutshell:nutshell-quotes-api
  name: Nutshell Quotes API
  description: Quote documents, their status transitions, and creating an invoice from a quote. 4 operation(s) across 4 path(s).
  humanURL: https://developers.nutshell.com/reference
  baseURL: https://app.nutshell.com/rest
  tags:
  - Quotes
  - Sales Documents
  properties:
  - type: OpenAPI
    url: openapi/nutshell-quotes-api-openapi.yml
  - type: Overlay
    url: overlays/nutshell-quotes-overlay.yaml
  - type: APIReference
    url: https://developers.nutshell.com/reference
- aid: nutshell:nutshell-sources-api
  name: Nutshell Sources API
  description: Lead sources — how leads arrive at your website and learn about your business. 4 operation(s) across 3 path(s).
  humanURL: https://developers.nutshell.com/reference
  baseURL: https://app.nutshell.com/rest
  tags:
  - Sources
  - Attribution
  properties:
  - type: OpenAPI
    url: openapi/nutshell-sources-api-openapi.yml
  - type: Overlay
    url: overlays/nutshell-sources-overlay.yaml
  - type: APIReference
    url: https://developers.nutshell.com/reference
- aid: nutshell:nutshell-tags-api
  name: Nutshell Tags API
  description: Tags used to group leads, contacts and accounts, with delete and undelete. 4 operation(s) across 3 path(s).
  humanURL: https://developers.nutshell.com/reference
  baseURL: https://app.nutshell.com/rest
  tags:
  - Tags
  - Taxonomy
  properties:
  - type: OpenAPI
    url: openapi/nutshell-tags-api-openapi.yml
  - type: Overlay
    url: overlays/nutshell-tags-overlay.yaml
  - type: APIReference
    url: https://developers.nutshell.com/reference
- aid: nutshell:nutshell-tasks-api
  name: Nutshell Tasks API
  description: Tasks assigned to Nutshell users, including assignee updates. 5 operation(s) across 2 path(s).
  humanURL: https://developers.nutshell.com/reference
  baseURL: https://app.nutshell.com/rest
  tags:
  - Task
  - Productivity
  tags_raw:
  - Tasks
  - Productivity
  properties:
  - type: OpenAPI
    url: openapi/nutshell-tasks-api-openapi.yml
  - type: Overlay
    url: overlays/nutshell-tasks-overlay.yaml
  - type: APIReference
    url: https://developers.nutshell.com/reference
- aid: nutshell:nutshell-territories-api
  name: Nutshell Territories API
  description: Sales territories used to scope ownership of Nutshell records. 1 operation(s) across 1 path(s).
  humanURL: https://developers.nutshell.com/reference
  baseURL: https://app.nutshell.com/rest
  tags:
  - Territories
  - Sales Operations
  properties:
  - type: OpenAPI
    url: openapi/nutshell-territories-api-openapi.yml
  - type: Overlay
    url: overlays/nutshell-territories-overlay.yaml
  - type: APIReference
    url: https://developers.nutshell.com/reference
- aid: nutshell:nutshell-users-api
  name: Nutshell Users API
  description: Nutshell users in the instance. 2 operation(s) across 2 path(s).
  humanURL: https://developers.nutshell.com/reference
  baseURL: https://app.nutshell.com/rest
  tags:
  - User
  - Identity
  tags_raw:
  - Users
  - Identity
  properties:
  - type: OpenAPI
    url: openapi/nutshell-users-api-openapi.yml
  - type: Overlay
    url: overlays/nutshell-users-overlay.yaml
  - type: APIReference
    url: https://developers.nutshell.com/reference
- aid: nutshell:nutshell-accounts-companies-api
  name: Nutshell Accounts (Companies) API
  description: The Accounts (Companies) API from Nutshell — 10 operation(s) for accounts (companies).
  humanURL: https://developers.nutshell.com/reference
  baseURL: https://app.nutshell.com/rest
  tags:
  - Accounts (Companies)
  properties:
  - type: OpenAPI
    url: openapi/nutshell-accounts-companies-api-openapi.yml
  - type: Documentation
    url: https://developers.nutshell.com/docs
  - type: APIReference
    url: https://developers.nutshell.com/reference
  - type: DeveloperPortal
    url: https://developers.nutshell.com
  - type: GettingStarted
    url: https://developers.nutshell.com/docs/getting-started
  - type: Quickstart
    url: https://developers.nutshell.com/docs/quickstart
  - type: Authentication
    url: https://developers.nutshell.com/docs/api-authentication
  - type: API Keys
    url: https://support.nutshell.com/en/articles/8429060-api-keys-create-api-keys-for-3rd-party-apps
  - type: Filters
    url: https://developers.nutshell.com/docs/filters
  - type: LLMsTxt
    url: llms/nutshell-llms.txt
- aid: nutshell:nutshell-contacts-people-api
  name: Nutshell Contacts (People) API
  description: The Contacts (People) API from Nutshell — 8 operation(s) for contacts (people).
  humanURL: https://developers.nutshell.com/reference
  baseURL: https://app.nutshell.com/rest
  tags:
  - Contacts (People)
  properties:
  - type: OpenAPI
    url: openapi/nutshell-contacts-people-api-openapi.yml
  - type: Documentation
    url: https://developers.nutshell.com/docs
  - type: APIReference
    url: https://developers.nutshell.com/reference
  - type: DeveloperPortal
    url: https://developers.nutshell.com
  - type: GettingStarted
    url: https://developers.nutshell.com/docs/getting-started
  - type: Quickstart
    url: https://developers.nutshell.com/docs/quickstart
  - type: Authentication
    url: https://developers.nutshell.com/docs/api-authentication
  - type: API Keys
    url: https://support.nutshell.com/en/articles/8429060-api-keys-create-api-keys-for-3rd-party-apps
  - type: Filters
    url: https://developers.nutshell.com/docs/filters
  - type: LLMsTxt
    url: llms/nutshell-llms.txt
- aid: nutshell:nutshell-events-timeline-api
  name: Nutshell Events (Timeline) API
  description: The Events (Timeline) API from Nutshell — 2 operation(s) for events (timeline).
  humanURL: https://developers.nutshell.com/reference
  baseURL: https://app.nutshell.com/rest
  tags:
  - Events (Timeline)
  properties:
  - type: OpenAPI
    url: openapi/nutshell-events-timeline-api-openapi.yml
  - type: Documentation
    url: https://developers.nutshell.com/docs
  - type: APIReference
    url: https://developers.nutshell.com/reference
  - type: DeveloperPortal
    url: https://developers.nutshell.com
  - type: GettingStarted
    url: https://developers.nutshell.com/docs/getting-started
  - type: Quickstart
    url: https://developers.nutshell.com/docs/quickstart
  - type: Authentication
    url: https://developers.nutshell.com/docs/api-authentication
  - type: API Keys
    url: https://support.nutshell.com/en/articles/8429060-api-keys-create-api-keys-for-3rd-party-apps
  - type: Filters
    url: https://developers.nutshell.com/docs/filters
  - type: LLMsTxt
    url: llms/nutshell-llms.txt
- aid: nutshell:nutshell-filter-api
  name: Nutshell Filter API
  description: The Filter API from Nutshell — 1 operation(s) for filter.
  humanURL: https://developers.nutshell.com/reference
  baseURL: https://app.nutshell.com/rest
  tags:
  - Filter
  properties:
  - type: OpenAPI
    url: openapi/nutshell-filter-api-openapi.yml
  - type: Documentation
    url: https://developers.nutshell.com/docs
  - type: APIReference
    url: https://developers.nutshell.com/reference
  - type: DeveloperPortal
    url: https://developers.nutshell.com
  - type: GettingStarted
    url: https://developers.nutshell.com/docs/getting-started
  - type: Quickstart
    url: https://developers.nutshell.com/docs/quickstart
  - type: Authentication
    url: https://developers.nutshell.com/docs/api-authentication
  - type: API Keys
    url: https://support.nutshell.com/en/articles/8429060-api-keys-create-api-keys-for-3rd-party-apps
  - type: Filters
    url: https://developers.nutshell.com/docs/filters
  - type: LLMsTxt
    url: llms/nutshell-llms.txt
- aid: nutshell:nutshell-stagesets-pipelines-api
  name: Nutshell Stagesets (Pipelines) API
  description: The Stagesets (Pipelines) API from Nutshell — 3 operation(s) for stagesets (pipelines).
  humanURL: https://developers.nutshell.com/reference
  baseURL: https://app.nutshell.com/rest
  tags:
  - Stagesets (Pipelines)
  properties:
  - type: OpenAPI
    url: openapi/nutshell-stagesets-pipelines-api-openapi.yml
  - type: Documentation
    url: https://developers.nutshell.com/docs
  - type: APIReference
    url: https://developers.nutshell.com/reference
  - type: DeveloperPortal
    url: https://developers.nutshell.com
  - type: GettingStarted
    url: https://developers.nutshell.com/docs/getting-started
  - type: Quickstart
    url: https://developers.nutshell.com/docs/quickstart
  - type: Authentication
    url: https://developers.nutshell.com/docs/api-authentication
  - type: API Keys
    url: https://support.nutshell.com/en/articles/8429060-api-keys-create-api-keys-for-3rd-party-apps
  - type: Filters
    url: https://developers.nutshell.com/docs/filters
  - type: LLMsTxt
    url: llms/nutshell-llms.txt
- aid: nutshell:nutshell-product-categories-api
  name: Nutshell Product Categories API
  description: ProductCategories
  humanURL: https://developers-rpc.nutshell.com
  baseURL: https://app.nutshell.com/api/v1/json
  tags:
  - Product Categories
  properties:
  - type: OpenAPI
    url: openapi/nutshell-product-categories-api-openapi.yml
  - type: Documentation
    url: https://developers.nutshell.com/docs
  - type: APIReference
    url: https://developers.nutshell.com/reference
  - type: DeveloperPortal
    url: https://developers.nutshell.com
  - type: GettingStarted
    url: https://developers.nutshell.com/docs/getting-started
  - type: Quickstart
    url: https://developers.nutshell.com/docs/quickstart
  - type: Authentication
    url: https://developers.nutshell.com/docs/api-authentication
  - type: API Keys
    url: https://support.nutshell.com/en/articles/8429060-api-keys-create-api-keys-for-3rd-party-apps
  - type: Filters
    url: https://developers.nutshell.com/docs/filters
  - type: LLMsTxt
    url: llms/nutshell-llms.txt
common:
- type: CapabilityMap
  url: capabilities/nutshell-capability-edges.yml
  name: Nutshell Business Capability Map
- type: Overlay
  url: overlays/nutshell-accounts-overlay.yaml
- type: Overlay
  url: overlays/nutshell-contacts-overlay.yaml
- type: Overlay
  url: overlays/nutshell-events-overlay.yaml
- type: Overlay
  url: overlays/nutshell-filters-overlay.yaml
- type: Overlay
  url: overlays/nutshell-pipelines-overlay.yaml
- type: Overlay
  url: overlays/nutshell-product-categories-overlay.yaml
- type: Website
  url: https://www.nutshell.com
- type: DeveloperPortal
  url: https://developers.nutshell.com
- type: Documentation
  url: https://developers.nutshell.com/docs
- type: APIReference
  url: https://developers.nutshell.com/reference
- type: GettingStarted
  url: https://developers.nutshell.com/docs/getting-started
- type: Quickstart
  url: https://developers.nutshell.com/docs/quickstart
- type: Support
  url: https://support.nutshell.com
- type: HelpCenter
  url: https://support.nutshell.com
- type: Blog
  url: https://www.nutshell.com/blog
- type: BlogRSS
  url: https://www.nutshell.com/feed
- type: GitHubOrganization
  url: https://github.com/nutshellcrm
- type: Pricing
  url: https://www.nutshell.com/pricing
- type: SignUp
  url: https://app.nutshell.com/signup
- type: Login
  url: https://app.nutshell.com/auth
- type: TermsOfService
  url: https://www.nutshell.com/legal/terms
- type: PrivacyPolicy
  url: https://www.nutshell.com/legal/privacy
- type: LinkedIn
  url: https://www.linkedin.com/company/nutshell-llc
- type: StatusPage
  url: https://status.nutshell.com
- type: Webhooks
  url: https://developers.nutshell.com/docs/working-with-webhooks
- type: Compliance
  url: https://www.nutshell.com/security
- type: LlmsText
  url: https://developers.nutshell.com/llms.txt
- type: LLMsTxt
  url: llms/nutshell-llms.txt
- type: AgenticAccess
  url: agentic-access/nutshell-agentic-access.yml
- type: Authentication
  url: authentication/nutshell-authentication.yml
- type: OAuthScopes
  url: scopes/nutshell-scopes.yml
- type: DomainSecurity
  url: security/nutshell-domain-security.yml
- type: TrustCenter
  url: security/nutshell-trust-center.yml
- type: Packages
  url: packages/nutshell-packages.yml
- type: SDKs
  url: packages/nutshell-packages.yml
- type: WellKnown
  url: well-known/nutshell-well-known.yml
- type: MCPServer
  url: mcp/nutshell-mcp.yml
- type: ToolCrosswalk
  url: mcp/nutshell-tool-crosswalk.yml
- type: Conformance
  url: conformance/nutshell-conformance.yml
- type: ErrorCatalog
  url: errors/nutshell-problem-types.yml
- type: Lifecycle
  url: lifecycle/nutshell-lifecycle.yml
- type: Conventions
  url: conventions/nutshell-conventions.yml
- type: DataModel
  url: data-model/nutshell-data-model.yml
- type: Sandbox
  url: sandbox/nutshell-sandbox.yml
- type: ChangeLog
  url: changelog/nutshell-changelog.yml
- type: Plans
  url: plans/nutshell-plans-pricing.yml
- type: RateLimits
  url: rate-limits/nutshell-rate-limits.yml
- type: Webhooks
  url: asyncapi/nutshell-webhooks.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: 71
  pass: local-v1

Nutshell API — frequently asked questions

Does Nutshell have an API?

Yes. APIs.io lists 26 APIs from Nutshell, including Nutshell Legacy JSON-RPC API, Nutshell GraphQL API and Nutshell Activities API, and 23 more.

Is there an OpenAPI specification for the Nutshell API?

Yes. APIs.io indexes 24 OpenAPI specifications for Nutshell, each linked for download from this page.

How do I authenticate with the Nutshell API?

Nutshell documents its authentication (http/oauth2 · 2 schemes). The details are profiled on APIs.io as Nutshell Authentication.

How much does the Nutshell API cost?

Nutshell publishes its prices; its Foundation plan is $13 per user as of 2026-10-28. APIs.io lists 11 pricing plans for Nutshell, with each plan's price, limits and inclusions under Pricing on this page.

Does Nutshell have an MCP server?

Yes. APIs.io lists 1 MCP server for Nutshell: Remote MCP server at app.nutshell.com over streamable HTTP requiring OAuth.

Is the Nutshell API ready for AI agents?

Nutshell has a Kin Score of 69.2 out of 100 (exemplar) and an Agent Readiness score of 52.2 (agent-ready), scored by API Evangelist on 2026-11-06.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

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get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
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curl "https://apis.io/api/v1/providers/nutshell/evidence"

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