Carta Cap Table & Equity API

Carta's equity management platform API for managing cap tables, equity grants, option exercises, 409A valuations, and investor reporting. Enables programmatic access to company ownership data, employee equity schedules, and fundraising round data.

Evaluated Mar 07, 2026 (0d ago) vcurrent
Homepage ↗ Other carta cap-table equity startup finance investors 409a
⚙ Agent Friendliness
52
/ 100
Can an agent use this?
🔒 Security
80
/ 100
Is it safe for agents?
⚡ Reliability
63
/ 100
Does it work consistently?

Score Breakdown

⚙ Agent Friendliness

MCP Quality
40
Documentation
55
Error Messages
55
Auth Simplicity
68
Rate Limits
50

🔒 Security

TLS Enforcement
92
Auth Strength
82
Scope Granularity
75
Dep. Hygiene
65
Secret Handling
82

Highly sensitive equity and ownership data. OAuth required. SOC2 certified. FINANCIAL RISK for autonomous modifications.

⚡ Reliability

Uptime/SLA
65
Version Stability
68
Breaking Changes
60
Error Recovery
58
AF Security Reliability

Best When

A startup or VC-backed company using Carta wants AI agents to query cap table data, equity positions, and investor information for reporting and financial planning.

Avoid When

You need to modify equity records — cap table changes require human legal oversight. FINANCIAL RISK: Equity data is highly sensitive legal and financial information.

Use Cases

  • Reading cap table data and ownership percentages for reporting agents
  • Retrieving equity grant details and vesting schedules for HR automation agents
  • Accessing 409A valuation data for financial planning agents
  • Querying investor and shareholder information for fundraising agents

Not For

  • Public company equity (Carta is focused on private company cap tables)
  • Real-time trading or secondary market transactions
  • Non-Carta equity platforms

Interface

REST API
Yes
GraphQL
No
gRPC
No
MCP Server
No
SDK
No
Webhooks
Yes

Authentication

Methods: oauth
OAuth: Yes Scopes: Yes

Carta OAuth 2.0. API access is limited — Carta controls developer access. Contact Carta for API credentials. Read-only scopes preferred for agents.

Pricing

Model: freemium
Free tier: No
Requires CC: Yes

Carta API access is controlled and requires approval. Contact Carta for developer access.

Agent Metadata

Pagination
cursor
Idempotent
Partial
Retry Guidance
Not documented

Known Gotchas

  • FINANCIAL RISK: Cap table data is highly sensitive legal and financial information
  • Carta API access is controlled — not publicly available, requires approval
  • No public MCP server available — agents must use REST API directly
  • Equity modifications require human legal and financial oversight
  • Cap table data includes personal ownership information — strict access controls required

Alternatives

Full Evaluation Report

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Scores are editorial opinions as of 2026-03-07.

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