LLM Test Server
Your LLM tests, without the provider
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LLM Test Server is a local, deterministic stand-in for 13 LLM provider APIs. Your app keeps its official SDK and points it at namespaced routes like /openai/v1; answers, tool calls, streams and failures come from fixtures your test sets up. The dashboard shows where every token goes: system prompt, tool schemas, conversation turns, prompt-cache reads and writes. Built forNET and Aspire, and shipped as a Docker image so any stack can use it. Free and open source.
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More like this: all 72 launches in api testing and mocking tools →
PH · launched Oct 22, 2026 · 22 upvotes (top 3%)
- Horizontal
- Observability & eval
- Developer
- AI feature
- Commercial product
- Open Source
- Developer Tools
- Artificial Intelligence
Similar launches
See all 134 similar launches →Could you build this?
Yes A local mock server that imitates provider REST APIs and streams from fixtures is tedious but standard HTTP and schema work.
Competitors
Other products that read as similar to this one : 134 launches clear the similarity bar, closest 8 shown.
Attention rank: #7 of 135 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 355 days after the earliest competitor.
- LLM Playground OS · ph · 2026-09-06 · 1 upvotes · similarity 0.48
- llmaker · ph · 2026-09-10 · 3 upvotes · similarity 0.46
- LLM Ⅰ beta · ph · 2026-09-15 · 1 upvotes · similarity 0.46
- LLM-Gateway · hn · 2026-03-27 · 7 upvotes · similarity 0.45
- llm-gateway-comparison · github · 2026-09-17 · 59 upvotes · similarity 0.45
- LLMGrid · ph · 2026-10-17 · 4 upvotes · similarity 0.45
- ChunkBack · hn · 2025-11-19 · 6 upvotes · similarity 0.44
- LLMValidate.ai · ph · 2026-10-22 · 2 upvotes · similarity 0.44
Other launches for this product
- No other launches for this product.