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. Site terms may apply to any integration approach, and how they apply is a determination each team makes for itself.
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.