You are here: Building with agents › The kits › Models.Anthropic
Summary#
Osysharp.Models.Anthropic is the class that talks to Anthropic's Messages API. Name it on the models it serves and every call to those models goes through it.
A provider is an ordinary class written in Osy#, using only what any app may use. The API key is a secret your app names; the kit asks for one host, api.anthropic.com, and an app that uses it grants that host or does not compile.
| Package | Osysharp.Models.Anthropic, version 1.0.0 |
| You add it with | use Osysharp.Models.Anthropic; in the app's manifest. |
| It sits on | [[agent-kit-llm|Llm]] |
| It also uses | Http — parts of the platform's own library |
| Its own test app | A ferry line's desk that answers travellers — kits/anthropic/tests |
Description#
What do you get without writing anything?#
- Complete and stream, with tools, prompt caching and structured output.
- Token counts reported to the meter, so calls are priced from what the provider says was used.
When do you need it?#
When your models are Anthropic's. You need at least one provider kit, or a provider class of your own.
What does it expose?#
The tables below are generated from the kit itself, not written by hand: osy kits Osysharp.Models.Anthropic --surface lists each of
them with the code of the kit's own test app that uses it, and the tests that show it working.
Types you use
| Type | What it is |
|---|---|
AnthropicClient | The Anthropic Messages API as an ILlmClient. |
AnthropicMessageRequest | What goes UP. |
AnthropicMessageResponse | What comes back from a non-streaming call. |
AnthropicBlock | One block of the answer. |
AnthropicUsage | The token counts. |
AnthropicStreamEvent | One server-sent event of a streamed answer. |
AnthropicStreamDelta | The changing part of an event: text as it is written, a tool's arguments as they are written, or the stop reason. |
What to read next#
- Osysharp.Llm — every call to a model: which one, what it may cost, what it did cost — every call to a model: which one, what it may cost, what it did cost
- Osysharp.Models.OpenAi — OpenAI's models, and anything that speaks the same wire, as a provider — OpenAI's models, and anything that speaks the same wire, as a provider
- The map of the kits — which sits on which, and what each one is for — the map of the kits — which sits on which, and what each one is for
Go deeper#
- [[agent-llm-calls#providers]] — how a provider is written and named
- [[agent-llm-calls#models]] — saying which models the app has