AngelList vs Sydecar: API, MCP and investor access compared

Key differences

• API. AngelList: planned (GraphQL, for GP and partner users). Sydecar: not documented.
• MCP server. AngelList: available (vendor-maintained, endpoint published, Streamable HTTP, OAuth 2). Sydecar: not offered.
• SFTP. AngelList: not offered. Sydecar: not documented.
• Difficulty. The registry rates AngelList 3 of 5 (exports, SFTP or email feeds, no investor-side API) and Sydecar 4 of 5 (web login only, exports possible). The rating describes how hard programmatic access is for an investor, not product quality.
• Capabilities. Listed for AngelList only: Capital account statements, NAV and Performance.
• Regions. Listed for AngelList only: Global.
• Standards. AngelList lists: OAuth 2; none recorded for Sydecar.
• MFA methods. Listed for AngelList only: authenticator app; listed for Sydecar only: email.
• Automation in the terms. Recorded as unknown for AngelList and prohibited for Sydecar.

What the entries have in common

• Email notifications: both are recorded as available.
• Neither entry documents webhooks.
• Investor-side API: not offered for either, according to the assessment.
• Export formats: both list PDF and CSV.
• Asset classes: both list Venture capital.
• Known deployments: none documented for either yet.

Which fits which need

Neither product is right for every team. The statements below are conditional and come straight from the registry fields above.

For investors and LP operations teams

• If your investors or your operations team need documents and data through an API, the registry records the API as planned for AngelList and not documented for Sydecar. Access for the investor itself is recorded as not offered for either.
• If you want to reach the data from an AI assistant, the MCP server is available for AngelList and not offered for Sydecar. A vendor MCP server can still be limited to the vendor's direct customers, so read the research notes below for who may sign in.
• If you process capital call and distribution notices from your inbox, email notifications are available for both.
• If you load files into your own systems, the registry lists PDF and CSV for both.
• If you plan to automate your own login, automation in the terms is unknown for AngelList and prohibited for Sydecar. Where it is prohibited or unknown, ask the GP or the vendor for a sanctioned channel first.

For GPs, fund administrators and buyers

• If you need to connect the product to your back office, AngelList records API planned, webhooks not documented and SFTP not offered; Sydecar records API not documented, webhooks not documented and SFTP not documented.
• If the product must carry the core LP reporting items (capital calls, distributions, capital account statements and tax documents), the structured capabilities cover all four for AngelList and capital calls, distributions and tax documents for Sydecar.
• If your investors are concentrated in particular markets, the regions recorded are North America and Global for AngelList and North America for Sydecar.
• If you manage a specific strategy, the asset classes recorded are venture capital for both.
• If you want to see who already runs each product, the registry has no documented deployments for either yet. Operators can add theirs to the registry.
• If your investors will want programmatic access later, the difficulty rating is 3 of 5 for AngelList and 4 of 5 for Sydecar, where 1 is a documented self-serve API an investor can use and 5 is web login only with MFA.

For a structured shortlist beyond these two products, see the guide how to choose an investor portal.

What the research says

AngelList (Venture)

Assessment. Vendor MCP server (AngelList Link) exposes documents, capital calls, distributions and capital accounts read-only but only to GPs; LPs limited to web (optional TOTP 2FA) with PDF/CSV tax exports; LP MCP and API announced as planned.

Research notes. Confidence: high on GP-only MCP server (vendor page angellist.com/link, help article on Link data & privacy, Claude marketplace listing). High on LP web features (help center: tax docs PDF/CSV, authenticator 2FA). Investor-side (LP) programmatic access: none today; AngelList states LP support planned. Terms page (venture.angellist.com/terms) could not be read (JS shell); automation policy unknown. Distinguish: MCP/API = GP audience; LP = web + email only.

• Web: Optional 2FA via authenticator app with downloadable recovery codes (help center). LPs see Taxes and Documents tab; tax statements exportable as PDF or CSV.
• API: GP side: AngelList Link page says 'API access planned for later this year' (2026). Separate GraphQL 'Investor Management API' / Data Room API exists for AngelList's Data Room and Digital Subscriptions products (GP/fund-ops customers; set up via portal@angellist.com; docs.angellist.com is auth-gated). No LP-facing API.
• MCP: AngelList Link (launched 2026-07-23): read-only, 28 tools (capital accounts, capital calls, distributions, documents, financial statements, partners, closes, subscriptions). Available to GPs and their teams only; LPs explicitly not yet supported ('LP use cases later'). Listed in Claude connector marketplace as verified. Not in official MCP registry.
• Webhooks: Data Room API pushes activity events (GP product).
• Email: LPs receive email for capital calls, statements and updates.

Sources: angellist.com/link · claude.com/marketplace/connectors/angellist · help.angellist.com/hc/en-us/articles/47543225581965-AngelList-Link-Data-Privacy · help.angellist.com/hc/en-us/articles/32869705627789-Where-do-I-find-my-tax-documents-and-financial-reports · help.angellist.com/hc/en-us/articles/32633716806029-I-m-logged-in-how-do-I-enable-2-factor-authentication-2FA · support.angellist.com/data-room/integrations/API

Sydecar

Assessment. Magic-link email login; K-1s downloadable in Tax Center; no developer docs; website ToS prohibits robots/spiders and account sharing.

Research notes. Confidence: high on magic-link login and Tax Center K-1 download (vendor help center). CSV export documented only for syndicate contacts (GP side). Website Terms of Service prohibit 'any robot, spider, or other automatic device' and providing others access to the account; paying customers are governed by an MSA. No investor-side API found; API existence unconfirmed (third-party feature list only).

• Web: Investors log in by requesting a magic link to their email (help center); no password documented. K-1s viewable/downloadable in Tax Center.
• API: Third-party directory (Software Advice) lists 'API' as a feature; no vendor developer docs, llms.txt makes no API mention. Unconfirmed.
• MCP: None found as of 2026-11-07.
• Email: Deal updates, capital calls and document notices by email (product updates).
• Terms: Prohibited Uses bar robots/spiders and account sharing; MSA may differ for customers.

Sources: help.sydecar.io/where-do-i-view-my-tax-documents · sydecar.io/blog/product-update-q1-26 · www.sydecar.io/legal/terms-of-service · sydecar.io/llms.txt

Frequently asked questions