The fastest backend for AI agents to discover
A Synsema API is discovered by an agent in 1.37 ms, ahead of Go and Node — and the discovery documents are generated, not written.
Before an LLM can use your API it has to discover it: robots.txt, the sitemap, /llms.txt, the plugin manifest, OpenAPI, a health check. That handshake runs on every cold interaction — so its latency matters.
One agent, full discovery handshake§
| Stack | Total (avg) |
|---|---|
| Synsema | 1.37 ms |
| Go | 1.83 ms |
| Node | 1.97 ms |
| FastAPI | 4.89 ms |
Synsema has the lowest discovery latency — ahead of Go and Node. Under a 50-agent swarm it also has the lowest per-agent latency (22 ms vs Go's 43 ms).
The part the others don't have§
Matching Go and Node on speed is table stakes. The difference: Synsema is secure by default, and /llms.txt, /sitemap.xml and /openapi.json are derived from the route table — the same route serves HTML to humans and Markdown/JSON to agents automatically, and the documents that describe the API can never drift from the code that serves it.
require serve(8080)
serve on 8080
describe
about: "Bookshop API"
api: ["GET /books -- the catalogue", "POST /orders -- place an order"]
route "GET /books"
give content(page([heading(1, "Books")], {"title": "Books"}))
That is the whole setup. /llms.txt, /robots.txt, /sitemap.xml, /openapi.json and a /docs page exist the moment the server starts. This very post is the demo: add .md to its URL, or send Accept: text/markdown.