HarnessRouter: Open-Sourcing the World’s First Unified Interface for Agent Harnesses and the Unified Harness Protocol
Plug Codex, Claude Code, and Hermes into your backend on your own infrastructure. Introducing the Unified Harness Protocol (UHP), an open standard for connecting applications to different agent harnesses.
Details
- External ID
- 111172
- Source
- YC
- Company
- Epsilla
- Product
- HarnessRouter: Open-Sourcing the World’s First Unified Interface for Agent Harnesses and the Unified Harness Protocol
- Website domain
- epsilla.com
- Launched
- Aug. 17, 2026
- Cohort
- Summer 2023
- Upvotes
- 6
- Upvotes percentile
- 0.14655172413793102
- Tags
- SaaS, Infrastructure, AI, Databases
- Fetched at
- Oct. 1, 2026, 1 a.m.
- Updated at
- Oct. 1, 2026, 1 a.m.
Enrichment
- Theme
- Claude integrations and coding agents
- Vertical
- Horizontal
- Function
- Dev tools
- Audience
- Developer
- AI stance
- AI feature
- Project type
- Commercial product
- Normalized one-liner
- unified interface for connecting applications to agent harnesses
- Manually corrected
- False
Could you build this?
Partial Standardizing agent APIs and building an orchestration gateway is feasible, but building low-latency, multi-tenant serverless execution sandboxes with secure isolated runtimes is technically demanding.
What it would actually take: A production version requires an API gateway (e.g., Go/Node.js) translating disparate agent protocols (Claude Code, Hermes, Codex) into a unified JSON/gRPC schema (UHP). The hard engineering piece is the secure serverless sandbox runner (using Firecracker microVMs or gVisor), managing bidirectional streaming multiplexing, file sync, and robust state persistence across dynamic sessions. Deep systems programming and virtualization/container orchestration expertise are required.
Competitors
Other products that read as similar to this one — 103 launches clear the similarity bar, closest 8 shown.
Attention rank: #87 of 104 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).
Launched 255 days after the earliest competitor.
- HarnessRouter: Unified interface for agent harnesses · hn · 2026-08-17 · 10 upvotes · similarity 0.67
- HarnessRouter Community Edition · ph · 2026-08-16 · 392 upvotes · similarity 0.65
- harness-bridge · github · 2026-09-17 · 83 upvotes · similarity 0.49
- HarnessRouter: Bring the World's Best AI Agents Into Your App, With One API · yc · 2026-07-23 · 29 upvotes · similarity 0.49
- I built an open source multi-agent harness in Go · hn · 2026-04-08 · 6 upvotes · similarity 0.47
- agent-harness · ph · 2026-09-10 · 3 upvotes · similarity 0.45
- Harness Router · ph · 2026-09-28 · 79 upvotes · similarity 0.45
- ulp · github · 2026-09-26 · 9 upvotes · similarity 0.45
Other launches for this product
- No other launches for this product.
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