YC Bookface

Last reviewed: July 2026

Overview

Integuru's YC Bookface integration provides production-ready HTTP API access to YC Bookface, the private network for Y Combinator founders and alumni at bookface.ycombinator.com, covering 7 actions including get_user_profile and start_chat. Integuru reaches Bookface via direct HTTP requests, so calls complete without browser overhead.

Private network, no public API. Bookface is intentionally closed to non-YC members and has no developer API. Automating any workflow on the platform previously required navigating the UI manually or writing fragile browser scripts tied to specific page layouts.

The get_user_profile action returns a complete founder record: id, yc, hnid, degrees, all_roles, full_name, locations, founder_bio, job_hunting, twitter_url, linkedin_url, current_company, and current_position. The list_launch_posts action returns a count integer and a posts array covering the full launch feed.

Teams building founder outreach tools, YC community analytics, or automated networking workflows use this integration to query launch posts, pull founder profiles, retrieve company data, and send messages programmatically. For community platforms beyond YC, see Groups.io or browse the full integrations catalogue.

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Use Cases

Integuru's YC Bookface integration gives your team programmatic access to founder profiles, company data, launch posts, and direct messaging across the YC network.

• Founder profile lookup: Call get_user_profile with a Bookface user ID to retrieve a complete founder record including bio, role history, location, job-hunting status, and linked social profiles.
• Company founder discovery: Use get_company_founders with a numeric company_id to return all founders associated with a given YC company.
• Launch post monitoring: list_launch_posts returns the full launch feed with a total count, useful for tracking new product launches across the YC portfolio.
• Direct messaging and group chats: The start_chat action accepts a user_ids array and an initial message. Pass one user ID for a 1:1 DM; pass multiple IDs for a group chat. The optional visibility parameter defaults to 'private' but can be set to 'public' to allow anyone to join.
• Chat history retrieval: Use get_chat_history with a chat_id to page through conversation messages. The after_id and before_id parameters support forward and backward cursor pagination when has_more_after or has_more_before is true.

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Setup Notes

Integuru's YC Bookface integration authenticates against https://bookface.ycombinator.com/. Integuru manages the login session automatically, including any authentication steps required by the YC network.

The start_chat action extracts user IDs from Bookface profile URLs. The ID appears as a numeric segment in the profile URL path. For 1:1 DMs, pass a single-element user_ids array; for group chats, pass multiple IDs and optionally set a name for the conversation. The visibility flag defaults to 'private', so group chats are invite-only unless you explicitly set it to 'public'.

Chat history pagination via get_chat_history uses cursor-based navigation: check the has_more_before and has_more_after flags in the response, then pass the oldest or newest message ID as before_id or after_id on the next call to page through the full conversation.