Nutshell API
Two self-serve APIs ship: a newer REST API and a legacy JSON-RPC API maintained indefinitely, included on every plan with in-app key creation. Auth is HTTP Basic with no OAuth flow. Rate limits are deliberately vague and enforced flexibly.
Frequently asked questions
Nutshell scores C on the API Report Card. Two self-serve APIs ship: a newer REST API and a legacy JSON-RPC API maintained indefinitely, included on every plan with in-app key creation. Auth is HTTP Basic with no OAuth flow. Rate limits are deliberately vague and enforced flexibly.
Nutshell has an official API, but teams routinely hit its limits: gated access, partial coverage, or paid tiers. Most end up supplementing it with exports or an unofficial API layer like Supergood.
Nutshell is an AI-assisted sales CRM and marketing-automation platform for small businesses and mid-market sales teams, headquartered in Ann Arbor, Michigan and owned since October 2022 by Pennsylvania-based digital-marketing agency WebFX.
Vertical: Financial Services (SMB/mid-market horizontal sales CRM, sold under WebFX's revenue-growth umbrella). Admins sign up at nutshell.com, import contacts/accounts from a CSV or via the Gmail/Outlook plugin, configure custom fields, and set up one or more sales pipelines with custom stages.
Nutshell is a recognized name in SMB CRM review media (G2 Leader, Capterra Shortlist categories) with 5,000+ paying customers across 50+ countries, ~84 employees as of 2026 per Tracxn/RocketReach, and reported revenue in the $2-5M range (Latka $4.7M in 2019; Growjo ~$2M in 2024, figures vary by source post-WebFX acquisition because financials are no longer broken out separately).
Yes, for the SMB and mid-market sales teams that adopt it, Nutshell is the operational system of record for the top-of-funnel through closed-won revenue cycle.
Nutshell was founded in 2009 (publicly launched 2010) in Ann Arbor, Michigan by Guy Suter and Andy Fowler, raising ~$2.22M across two early rounds (totaling ~$5.6M including later funding per Crunchbase/Tracxn).
Rate-limit policy is intentionally vague, Nutshell states it takes a 'flexible approach' and that limits 'may change depending on current conditions,' with no published numeric ceilings; large find/list requests with non-stub responses are throttled hardest, and developers needing higher limits must contact support. Authentication is HTTP Basic with an API key as password, no first-class OAuth 2.0 flow for marketplace apps means multi-tenant SaaS integrations are awkward and credentials must be exchanged manually. Full sourced list under Sources below.
Common alternatives include HubSpot CRM / Sales Hub, Salesforce Sales Cloud, Pipedrive, Zoho CRM, Freshsales (Freshworks), Monday Sales CRM. Graded alternatives appear under "More from the report card" below.
Grades measure one thing: can a customer's engineering team get their own data out programmatically? We check six things (whether a real API exists, how access is gated, data coverage, auth quality, docs and developer experience, and stability) and roll them into a letter grade. Grades get re-verified, and they only move on evidence.