StartupY Combinator (S26)
HyperProbe
An AI on-call agent that drops read-only probes into production to debug live systems.
HyperProbe launched on Hacker News in August 2026 with a way for Cursor and Claude to place read-only probes in production and debug live systems. Its site now leads with an "AI on-call agent" built on the same idea. Y Combinator S26.
Neighbours in the directory
San Francisco, CA · Est. 2022
The de-facto standard toolkit for building LLM applications and agents.
LangChain makes the LangChain framework and LangGraph, the low-level orchestration standard for stateful, controllable agents, plus the LangSmith platform for tracing, evaluating and monitoring them in production.
~$75M raised
San Francisco, CA · Est. 2023
The integration layer: hundreds of managed tools your agents can call.
Composio handles auth, schemas, observability and reliability for the external SaaS tools an agent uses — 'plumbing for agentic actions' across Slack, GitHub, Salesforce and 250+ other surfaces.
Est. 2024
A registry and toolchain for MCP servers.
Smithery indexes and helps deploy MCP (Model Context Protocol) servers — a distribution layer for the tool ecosystem agents connect to.
Sources
Verified Oct 29, 2026