Skip to main content
Square1 is an LLM gateway operated for a verified community. It fronts a pool of frontier and open-weight models behind one OpenAI-compatible API, so anything that speaks the OpenAI wire format — the official SDKs, RisuAI, SillyTavern, LangChain, plain curl — works by changing the base URL and the API key.
Access requires a verified community account, and the service is region-locked. If you don’t have an account yet, start with the Quickstart.

​
What you get

Chat completions

OpenAI-compatible POST /v1/chat/completions with streaming, tool calling, vision input, and a reasoning_effort extension.

Embeddings

POST /v1/embeddings with fixed 1024-dimension output.

Live model catalog

GET /v1/models reflects exactly what your key can call right now, including live input ceilings and rate limits.

Quota introspection

Every completion carries a quota receipt, and GET /v1/usage reports your session and weekly standing.

​
How it differs from OpenAI’s API

Square1 keeps the OpenAI wire format but is a shared community pool, so a few things work differently:
  • Quotas are pooled and weighted. You draw from a rolling session budget and a weekly budget, and each model has a shared daily cap. See Quotas.
  • Responses carry a quota receipt. The wellspring block and a set of x-session-* / x-weekly-* headers tell you where you stand after every request. See Quota feedback.
  • The request schema is a strict subset. Fields like n, presence_penalty, logprobs, seed, and response_format are not accepted. The API Reference lists exactly what is.
  • Model routing is opaque by design. The API never reveals which infrastructure serves a given model — owned_by names the model’s maker, nothing more.

​
Bring your own key

If you have your own account with a model provider, you can register that credential in the dashboard and route requests through it with the @provider/model syntax — see BYOK.