Carta

Needs Work

Agent Native Score

API Key Auth

Carta is a cap table and equity management platform for private companies, providing cap table management, valuations, and investor relations tools. It serves as a central hub for managing company ownership, equity compensation, and fundraising workflows.

Categories: Cap Table · Equity Management · Fundraising

#2 of 2 in Fundraising

Checklist Breakdown

9 of 33 checks passed. 14 unscored.

Discovery 50%

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 33%

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 60%

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

Carta presents significant barriers to agent adoption. There is no MCP server, OpenAPI spec, or llms.txt to enable agent discovery—the API documentation is proprietary and behind authentication. Account creation requires human identity verification and company registration, making programmatic signup impossible. The API exists but lacks comprehensive public documentation; agents would struggle to understand available endpoints and parameters. The platform requires enterprise contracts or paid plans with no free tier, and pricing is not transparent or usage-based. While Carta is reliable and well-established, its closed nature makes it fundamentally incompatible with autonomous agent workflows.

Carta

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