Connect any data source

Multi-API integration

yak connects to your existing APIs—tRPC, GraphQL, REST/OpenAPI, or custom adapters. The AI reads your schema and authors the right query; your own client executes it, so your auth, transport, and error handling all apply. You provide the API, we handle the AI.

Read the docs

Works withChat & voiceAll SDKstRPC / GraphQL / RESTCustom adaptersMultiple APIs at once

Supported adapters

tRPC

Procedure introspection

GraphQL

Schema-based queries

REST

OpenAPI spec support

Custom

Build your own

// One toolset, every source

createYakToolset([trpcAdapter, graphqlAdapter])

What you get

tRPC adapter with procedure allow/blocklisting
GraphQL schema integration (string or lazy introspection)
REST/OpenAPI spec support
Custom adapters for databases and any data source
Combine multiple APIs in a single assistant

How it works

Wire your APIs as adapters

Point an adapter at each source—a GraphQL SDL, an OpenAPI spec, a custom ToolSource, or a tRPC router—and compose them with createYakToolset into one merged tool manifest.

The model authors the request

Yak gives the AI your schema in each tool's description, and the model produces a concrete request (a tRPC procedure call, a GraphQL query, or a REST method/path/body) when a user asks for something.

Your client executes and returns the result

Yak hands the model-authored request to your execute callback so your own client runs it with your auth and transport, then the result flows back through the same onToolCall path in both chat and voice.