Claude + Carta: What the Integration Can (and Can't) Do in 2026
Yes — Carta ships an official connector for Claude, so Claude can actually read your cap table and fund data. This is the exception, not the rule, for private-markets software. Carta hosts what’s called an MCP server (the standard way an outside app plugs into Claude) at https://mcp.app.carta.com/mcp, connecting Claude to cap table, investor, fund, accounting, and company financial data. You add it to Claude — Claude Code, the Claude desktop app, or another compatible app — and sign in through a normal browser login the first time (it’s reused after that). Separately, Carta runs a full developer platform and API, though that side went invite-only for third-party partners in 2025.
Here’s what’s actually connected, where the gates are, the limits, and what to use if you want Carta work that runs on its own.
The official connector, and what it’s good at
Carta’s connector is a real, vendor-built one — not a community project. Point Claude at https://mcp.app.carta.com/mcp, sign in, and Claude can query the data you already have access to in Carta: ownership and valuations, pro-forma round modeling, exit-scenario math, investment metrics, and fund performance. For a founder checking dilution before a SAFE converts, or an investor pulling position data across a portfolio, that’s genuinely useful — it reads your live numbers instead of a stale spreadsheet export.
Because it’s a remote connector, there’s a plan wrinkle: adding it on claude.ai requires a paid Claude plan (Pro or higher). Claude Code and the desktop app can connect it on your own machine. Either way, the sign-in means Claude only ever sees what your own Carta permissions allow.
The API side is a different, gated story
If you want to build beyond the hosted connector — your own automation against Carta’s API — the path narrowed in 2025. Carta debuted four API suites (Issuer, Investor, Portfolio, and Launch) and, at the same time, moved third-party partner access to invite-only, with partners expected to hold a valid SOC 2 Type 2 certification. Companies and investment firms can still get API access to consume their own Carta data on demand, and there’s a self-serve developer portal with test data for prototyping.
So there are two on-ramps, and they don’t overlap neatly: the official connector for reading your data inside Claude, and a partner-gated API program for building products on Carta data. No mainstream Zapier or Pipedream bridge for Carta surfaced in this pass, so that middleware shortcut isn’t the play here — the official connector already exists.
The limits that actually matter
Even with an official server, the shape is “an assistant you operate,” not “an agent that runs.” Three limits define it:
- No triggers, no monitoring. Carta’s connector only runs inside a conversation you start. There’s nothing watching for a new round to close, a SAFE to convert, or an option grant to vest so Claude can act. You have to be in the chat, asking.
- Conversation-only. Claude pulls a cap table or models a round when you prompt it; it doesn’t sit on your account and follow up. Close the chat and nothing continues.
- Scheduled, not event-driven. The closest thing to “on its own” is Claude’s scheduled tasks, which fire on a fixed clock rather than when something changes on your cap table — and Claude has no inbox to receive an alert. That’s not a 24/7 process watching your cap table.
So Claude + Carta is excellent for “model the dilution if we raise $5M at a $30M pre” and not built for “email every new investor their closing docs the moment the round closes.”
If you want Carta work that runs on its own: Carly
The moment you want something to happen around Carta without you in the chat — email an LP the instant a capital call is recorded, send a quarterly ownership summary to the team, flag when an option pool is running low — you’ve crossed past what the connector is for. It reads and answers; it doesn’t watch and act.
That’s where Carly fits. Carta’s connector lets Claude read your cap table when you ask; Carly turns that read into an acted-on workflow. Carta connects to Carly via your own API key — paste it on carlyassistant.com/integrations — and Carly works the API for you:
- When a round closes, Carly drafts each new investor’s closing email, sends it, and logs the update — no chat needed.
- When the cap table changes, Carly recomputes ownership and emails the affected founders or partners a plain-English summary.
- When an option grant vests or is exercised, Carly flags it and drafts the notice to the employee and finance.
- When a 409A valuation is coming due, Carly reminds the team ahead of time and pulls the current cap table to attach.
- Actually sends and updates — drafts and sends email across Gmail and Outlook with attachments, updates tasks, and syncs your CRM.
Carly connects to 200+ tools natively (see integrations), plus any tool with an API — Carta included — via your own key. AI agents start at $35/month, and steps that don’t use AI run free.
Claude vs Carly for Carta
| Claude (official connector) | Carly | |
|---|---|---|
| Read cap table & fund data | Yes (official connector) | Yes |
| Model rounds & exits | Yes | Yes |
| Acts on Carta events / triggers | No | Yes |
| Emails LPs on a schedule on its own | No | Yes |
| Fires on triggers, not just a timer | No | Yes (cloud) |
| Sends the emails itself, not just drafts | No — drafts only (Gmail + Outlook) | Yes |
| What it takes to set up | Add the official connector (paid plan for remote) | Paste your Carta API key |
| Pricing | Pro $20+ (plan needed for remote connector) | AI agents from $35/mo |
Claude with Carta’s official connector is a cap table you can query in a chat. Carly is a teammate that acts on fund and equity events as they happen.
Frequently Asked Questions
Does Claude work with Carta?
Yes. Carta hosts an official connector for Claude at https://mcp.app.carta.com/mcp. Add it to Claude Code, the Claude desktop app, or another compatible app and sign in, and Claude can read your cap table, investor, and fund data. Adding it on claude.ai requires a paid Claude plan.
Is there a Carta API I can build on?
Yes, but access narrowed in 2025. Carta’s four API suites (Issuer, Investor, Portfolio, Launch) moved to invite-only for third-party partners, who need SOC 2 Type 2 certification. Companies and firms can still access their own data, and there’s a self-serve developer portal with test data.
Can Claude update my Carta records or send investor emails automatically?
Not on its own. The connector answers inside a conversation you start; it doesn’t watch for events or run while the chat is closed. For that, use Carly, which fires on events and schedules 24/7 in the cloud.
What if I want Carta to act on its own — email LPs, send ownership summaries?
That’s outside what the connector does. Carly fires on events and schedules 24/7 in the cloud and can email investors, send summaries, and update records the moment something changes in your fund or cap table. AI agents start at $35/month.
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