Direct model provider

Use Anthropic through Relays.

Route native Anthropic Messages requests through Relays while keeping the provider credential behind the gateway.

One alias in front of Anthropic.

Your application calls a Relays alias. Relays holds the Anthropic credential, applies the route policy, and hands back the provider response in the shape your SDK expects.

  1. CallerYour application

    Keeps the Anthropic request it already sends.

  2. EdgeRelays

    Holds the key, picks the candidate, writes the receipt.

  3. UpstreamAnthropic

    Receives the call on its own base URL.

Wire protocol
Anthropic
Relays endpoints
  • Messages
Credential boundary
Bring your own Anthropic API keyANTHROPIC_API_KEY
Upstream base URL
https://api.anthropic.com/v1
Connection
Registry entry
Source
Anthropic API documentation

Relays exposes the native Messages edge, including streaming, thinking, tool payloads, and MCP configuration where the selected route can honor the request.

What is measured, and what is not.

Availability comes from Anthropic. Latency, error rate, and cost per successful request come from your own traffic, so Relays leaves them empty until requests run.

Upstream status

Anthropic
Not published to Relays
Anthropic does not publish a status feed Relays can read, so no availability is reported here.

Relays measurements

Your traffic
No sample yet
Time to first token, error rate, and cost per successful request are read from requests that ran through Relays. This route has none, so there is nothing to plot.

Models at the edge.

Model IDs sit behind a Relays alias, so a catalogue change at Anthropic never reaches your code.

Catalogue not connected
Relays has not published a Anthropic model list on this page. Route candidates are still set by model ID in your route configuration.

Every route carries a policy.

A route is a list of candidates, a budget, and a record of what happened. You set all three before any traffic runs.

Fallback

Candidates stay inside the contract.

Messages routes can fall back only to configured Anthropic-compatible candidates that satisfy the requested capabilities. Relays does not flatten Messages into Chat Completions for cross-protocol fallback.

See how a route is chosen
Budget

A ceiling on this route.

Set an alert threshold and a stop threshold for the route rather than for the whole application. Relays checks both before the call goes upstream.

Receipt

Each attempt is written down.

Every call records the alias, the candidates tried, the status each returned, tokens in and out, and the estimated cost of the attempt that served it.

Read a route receipt

One endpoint is enough to start.

Keep the client you already wrote. Bring us the workload and we will map the first Anthropic route with you.

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