Nutshell

Fair

Agent Native Score

Free TierAPI Key AuthOpenAPI Spec

Nutshell is a CRM platform designed for small business sales teams, offering contact management, pipeline tracking, and sales automation. It provides APIs for integrating customer data and sales workflows.

Categories: Crm · Sales · Contact Management

#35 of 66 in Crm · #18 of 38 in Sales · #2 of 2 in Contact Management

Checklist Breakdown

13 of 33 checks passed. 14 unscored.

Discovery 63%

Can an agent find and understand this tool without a web search?

✓ Published OpenAPI/Swagger spec

✗ Has llms.txt or llms-full.txt

✗ Has an MCP server (official or well-maintained)

✗ MCP server listed in a public registry

✓ API reference docs are publicly accessible

✓ Docs include runnable code examples

✓ Has a public changelog or release notes

✓ Has a public status page

Auth & Onboarding 50%

Can an agent create an account and get credentials without human intervention?

✗ Signup does not require CAPTCHA

✗ Signup does not require phone verification

✓ Supports API key auth (not only OAuth)

✗ API key obtainable without manual approval

✓ No mandatory billing info to start

✓ Can sign up without creating an organization

Pricing 100%

Can an agent operate autonomously without upfront payment or contracts?

✓ Has a free tier

✓ Usage-based pricing available

✓ No minimum contract or commitment

✓ Pricing page is public (no 'contact sales')

✓ Free tier sufficient for testing (not just a trial)

Agent Tooling Not yet scored

How well does the API work for non-human consumers?

— SDK available in 2+ languages

— Structured error responses (JSON with error codes)

— Idempotency support on write endpoints

— Pagination on list endpoints

— Webhook/event support

— Sandbox or test mode available

— Rate limit headers in responses

— Consistent REST resource naming

Reliability Not yet scored

Does the tool fail gracefully when an agent makes a mistake?

— Meaningful error messages (not just 500)

— 429 responses include Retry-After header

— Documented uptime SLA (99.9%+)

— Graceful degradation under rate limits

— Request IDs in responses for debugging

— API versioning supported

Reviewer Notes

Nutshell offers a REST API with OAuth2 and API key authentication, and maintains a free tier with sandbox environment, which are positives for agent experimentation. However, discovery is hampered by lack of MCP server and llms.txt file—agents cannot easily find or understand the full capability set without manual documentation review. Account creation requires human intervention (no programmatic signup), and the API documentation, while available, is not exceptionally well-structured for autonomous agent integration. The platform is reasonably stable for a mid-market CRM but lacks the agent-specific tooling (structured schemas, error recovery patterns) that modern AI-native tools provide.

Nutshell

Let your agents find tools like Nutshell