AI model API gateway

Model APIs built to stay up.

One API key for hundreds of models from OpenAI, Anthropic, Google, DeepSeek, Alibaba and more. Many models are offered in several groups, each a different upstream source with its own price and public 24-hour availability. With smart routing, the default for new keys, a failed request (other than a 408, 504 or 524 timeout) is retried in another group automatically, inside the same call.

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OpenAI-compatiblehttps://api.steadyrouter.com/v1
Anthropic Messageshttps://api.steadyrouter.com
curl https://api.steadyrouter.com/v1/chat/completions \
  -H "Authorization: Bearer $STEADYROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-5",
    "messages": [{"role": "user", "content": "Hello"}]
  }'

Why SteadyRouter

Most API resellers send every request to one upstream source. When it goes down or quietly changes what it delivers, every request still comes back as HTTP 200, and their customers have no way around it. We list each source as its own group, show how each one is doing, and let smart routing move a failed request to another group, so one source going down does not have to take your app down.

1

Each source listed once

Many reseller domains lead back to the same operator. We track who actually runs each source, so a source sold under several domains is still one group, not several under different names.

2

Automatic failover

With smart routing on, if a group returns an error (other than a 408, 504 or 524 timeout), the request moves to the next group that offers the model, within the same API call, up to 5 groups; a 400 error from upstream is retried in at most one more group, at another upstream site. Attempts that fail and get retried in another group are not charged.

3

More than HTTP 200

A success code says nothing about what you actually received. Every day we check, from real traffic, that each group returns the model you asked for, and each group's success rate over the last 24 hours is public on Model Square, next to its price.

One model, several groups

Each group is a different upstream source with its own price, feature support, speed and availability. Open a model on Model Square to compare its groups side by side. Keep smart routing on (the default) or choose the groups yourself on your API key; model names in your code stay the same.

Group names

Claude-Bedrock-01

Names read product-source-number, and the source tells you the type: Bedrock, Azure and Vertex run on a cloud provider; API is an official API relay as stated by the supplier; CN is models from Chinese developers; Mixed is mixed sources; Image and MJ are for images.

Default

Smart routing

We rank the groups for you, and retry another group if one fails. The default mode, “Auto”, generally puts cloud and API groups first and Pool groups last; “Lowest price”, “Fastest” and “Most reliable” rank by that one measure, so a Pool group can come first. You can also turn smart routing off and set your own group priority on the key.

Usually cheaper

Claude-Pool-01

Pool groups are account pools: usually cheaper, sometimes less stable. For stability-critical work, prefer cloud or API groups.

Works with the tools you already use

Any SDK or app that lets you set a custom base URL.