YC GraphQL MCP · Distributed Systems
Direct YC GraphQL MCP: live editable fields, typed updates, concurrency checks and verified saves.
- tools
- 22
- transport
- STDIO
- last updated
- Nov 10, 2026
Tools
22 toolsPublic tool metadata for what this MCP can expose to an agent.
yc_statusLocal auth state, transport, storage health, pending work and mutation policy
Local auth state, transport, storage health, pending work and mutation policy
No parameter schema in public metadata yet.
yc_get_editabilityLive form fields and current application permissions
Live form fields and current application permissions
No parameter schema in public metadata yet.
yc_prepare_application_updateTyped text changes with exact diffs and preconditions
Typed text changes with exact diffs and preconditions
No parameter schema in public metadata yet.
yc_commit_application_updateRecheck, commit once, and automatically verify saved answers
Recheck, commit once, and automatically verify saved answers
No parameter schema in public metadata yet.
yc_verify_application_updateCompare current answers with expected values without writing
Compare current answers with expected values without writing
No parameter schema in public metadata yet.
yc_export_applicationReturn private Markdown to your MCP host; writes no files
Return private Markdown to your MCP host; writes no files
No parameter schema in public metadata yet.
yc_connectionSetup information; extension pairing JSON in browser mode
Setup information; extension pairing JSON in browser mode
No parameter schema in public metadata yet.
yc_list_applicationsApplication summaries, founder references and edit flags
Application summaries, founder references and edit flags
No parameter schema in public metadata yet.
yc_get_applicationAnswers and status for an application UUID
Answers and status for an application UUID
No parameter schema in public metadata yet.
yc_get_founder_profileFounder narrative, education and work history for a bio UUID
Founder narrative, education and work history for a bio UUID
No parameter schema in public metadata yet.
yc_describe_schemaGraphQL root types, if YC allows introspection
GraphQL root types, if YC allows introspection
No parameter schema in public metadata yet.
yc_describe_typeType fields, inputs, arguments, enums and deprecations
Type fields, inputs, arguments, enums and deprecations
No parameter schema in public metadata yet.
yc_introspect_schemaFull schema, capped at 2 MB
Full schema, capped at 2 MB
No parameter schema in public metadata yet.
yc_inspect_scriptsSearch referenced JavaScript without executing it
Search referenced JavaScript without executing it
No parameter schema in public metadata yet.
yc_queryExecute one explicitly named query
Execute one explicitly named query
No parameter schema in public metadata yet.
yc_register_operationSave an observed document locally; no execution
Save an observed document locally; no execution
No parameter schema in public metadata yet.
yc_list_operationsList saved documents
List saved documents
No parameter schema in public metadata yet.
yc_remove_operationRemove a saved document locally
Remove a saved document locally
No parameter schema in public metadata yet.
yc_run_operationExecute a saved query with variables
Execute a saved query with variables
No parameter schema in public metadata yet.
yc_prepare_mutationInert exact-payload preview with a durable receipt
Inert exact-payload preview with a durable receipt
No parameter schema in public metadata yet.
yc_commit_mutationCommit a reviewed preview once
Commit a reviewed preview once
No parameter schema in public metadata yet.
yc_mutation_receiptsInspect recent or specific durable receipts
Inspect recent or specific durable receipts
No parameter schema in public metadata yet.
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Distributed Systems — Your YC app. Your AI workflow.
YC GraphQL MCP
Talk to your YC application from your MCP client. Read answers, review changes, and verify every save.
v2.1.0 · 22 tools · Node 22 / 24 / 26 · MIT
Quick start · Tools · How saves work · Operations · Releases
A local MCP server for direct HTTP access to https://apply.ycombinator.com/graphql. Version 2.1.0 includes 22 tools, private session capture and rotation, durable mutation receipts, application/profile reads, operation discovery, and an optional Chrome extension transport.
Node sends API requests. A browser is needed only for manual sign-in, unless you explicitly choose the extension transport. This is an unofficial client; YC owns the upstream API, authentication rules, and application edit permissions.
Try asking your MCP client:
Details
- Repository
- github.com/arthurcolle/yc-graphql-mcp
- Website
- github.com/arthurcolle/yc-graphql-mcp
- Package
https://github.com/arthurcolle/yc-graphql-mcp/releases/download/v2.1.0/yc-graphql-mcp-2.1.0.mcpb- Transport
- STDIO
- Registry
- MCP registry, active