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Guide for adding first-party AI provider packages to the AI SDK. Use when creating a provider package under packages/ to integrate an external AI service.
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{"internal":true}
Add a Provider Package
Add a complete first-party @ai-sdk/<provider> package that follows the current provider interfaces, repository conventions, security requirements, and release process.
Secure URL handling when the provider fetches polling, image, audio, video, or other URLs
Use PR #18595 as a recent end-to-end example, but choose the current provider package whose API shape and model types most closely resemble the new provider as the implementation reference.
Third parties can publish provider packages outside this repository. A new first-party @ai-sdk/<provider> package requires prior discussion in an issue. Confirm that agreement exists before implementing the package.
Discover the API Contract
Before designing model classes, look for an official, versioned OpenAPI or Swagger specification in the provider's documentation or repositories. Prefer first-party specifications and record the source URL plus its version, publication date, or commit in the implementation notes or pull request.
Use the specification and official documentation to identify:
base URLs and authentication schemes
supported endpoints, model types, and capabilities
request parameters and response shapes
streaming transports and event formats
error response envelopes
asynchronous polling and download URL flows
Treat an OpenAPI specification as implementation evidence, not unquestioned truth. Specifications are often incomplete for server-sent events, streaming deltas, polymorphic content, tool calls, nullable fields, and errors. Do not add a generated client or generated production types by default. Implement minimal hand-written types and Zod schemas, then verify them against official documentation and captured API responses.
If no official specification exists, derive the contract from official documentation and real response fixtures, and note that limitation in the pull request.
Plan the Provider Shape
Determine which AI SDK model interfaces the provider supports, such as LanguageModelV4, EmbeddingModelV4, ImageModelV4, SpeechModelV4, TranscriptionModelV4, RerankingModelV4, or Experimental_VideoModelV4.
Before introducing a dependency, public API pattern, or new abstraction, read contributing/decisions/README.md and relevant accepted ADRs. Prefer existing provider utilities and implementation patterns.
Scaffold the Package
Create packages/<provider>/ by adapting a current, comparable provider package. A typical package contains:
Preserve current package conventions rather than recreating configuration from memory:
Set the repository package version to exactly 2.0.0, with no prerelease suffix.
Create CHANGELOG.md with an initial # @ai-sdk/<provider> heading.
Use ESM output and the current tsup package-version injection pattern.
Extend ./node_modules/@vercel/ai-tsconfig/ts-library.json, enable a composite project, and add package references for workspace dependencies.
Include the standard build, clean, type-check, Node test, and Edge test scripts.
Include the standard files, documentation prepack, repository, bugs, engines, and public provenance publishing metadata.
Use workspace:* for AI SDK workspace dependencies. Add @ai-sdk/test-server only when tests use it.
Support the repository's Zod 3 and Zod 4 peer dependency range and use zod/v4 for new implementation schemas.
Run pnpm update-references after adding or changing workspace dependencies.
Implement the Provider Factory
Follow the current provider factory pattern:
Define a provider interface that extends ProviderV4.
Export create<Provider>(settings) and a default provider instance.
Make the provider callable when it has a meaningful default model type and comparable providers follow that pattern; otherwise return a provider object.
Set provider.specificationVersion = 'v4'.
Implement the fully specified factory methods required by ProviderV4, such as languageModel, embeddingModel, and imageModel.
Add short aliases such as chat, embedding, or image only when they improve the provider's API.
Throw NoSuchModelError from unsupported required model factories.
Support provider-appropriate settings such as apiKey, baseURL, headers, and a custom fetch implementation.
Load credentials with loadApiKey or the appropriate shared utility, normalize configurable base URLs, and include the package version in the user-agent suffix.
Export the provider factory, default instance, public option types, model ID types, and VERSION from src/index.ts.
Implement Model Classes
Implement each supported model using the appropriate interface from @ai-sdk/provider and shared utilities from @ai-sdk/provider-utils.
Provider option types and schemas must follow the repository naming and export rules. User-facing option fields should use .optional() unless null is meaningful. Response schemas should be minimal, tolerate unused provider fields, and use .nullish() where the API may omit or return null.
All model classes must implement the workflow serialization contract described in Provider development notes:
make model configuration headers optional
add WORKFLOW_SERIALIZE and WORKFLOW_DESERIALIZE static methods
use serializeModel, serializeModelOptions, or the matching existing pattern
ensure authentication and other non-serializable functions can be restored from request options or the workflow environment
Handle Responses, Errors, and URLs Safely
Never use JSON.parse in production code. Use parseJSON or safeParseJSON from @ai-sdk/provider-utils.
Validate successful and failed responses with minimal schemas and shared response handlers such as createJsonResponseHandler and createJsonErrorResponseHandler.
Introduce a custom AISDKError subclass only when the package needs a new public SDK error type; ordinary provider HTTP failures should use the shared API error handling.
Set validateUrl explicitly on every getFromApi call.
Use validateUrl: true when the URL host or scheme comes from a provider response, and false when it is derived from a developer-configured base URL.
Use trustedOrigin for legitimate response URLs that may point to a configured private or self-hosted endpoint.
Use credentialedOrigin when credentials may be sent on the first hop, so they are withheld from off-origin URLs and redirects.
Read Secure URL handling before implementing any polling or provider-supplied download URL flow.
Test Against the Real Contract
Add focused tests for:
provider defaults, custom settings, factory aliases, and unsupported model types
request serialization and response parsing
streaming events, usage, finish reasons, warnings, tool calls, and provider metadata where supported
error response parsing and malformed responses
workflow serialization and deserialization
URL trust decisions for polling or downloads
both Node.js and Edge runtimes
Use real provider responses as fixtures when practical. Read the capture API response fixture skill before capturing them. Trim oversized fixtures only when doing so does not change their semantics.
Put additional examples in the same provider directory with descriptive kebab-case.ts names. Do not create flat provider files such as src/generate-text/<provider>.ts.
Also update the relevant repository integration points:
add @ai-sdk/<provider> to examples/ai-functions/package.json
add its project reference to examples/ai-functions/tsconfig.json
add required credentials to examples/ai-functions/.env.example
add credential names to the root turbo.json environment configuration when needed
run pnpm update-references to update root and package TypeScript references
Run representative examples against the real API and confirm both non-streaming and streaming behavior when supported.
Add Package and Provider Documentation
Write the package README.md with installation, authentication, configuration, supported models, and basic usage.
Add content/providers/01-ai-sdk-providers/<last number + 10>-<provider>.mdx with setup, model capabilities, provider options, and examples.
Configure the package's documentation prepack script to include that provider page.
Prepare the Release
Create a major changeset for the new provider package. The repository package remains at plain 2.0.0; do not add -beta, -canary, or another prerelease suffix.
Before the first automated release, coordinate with the Vercel IT team to bootstrap an empty @ai-sdk/<provider> package on npm at 0.0.0 and configure its Trusted Publisher. Follow Bootstrapping a new @ai-sdk/* package. The temporary npm bootstrap version is separate from the repository package version.
When main is in prerelease mode, do not backport the new package to a stable vX.Y branch.
Also run the new examples with the required provider credentials. Run the root build when changes to shared packages or build configuration make it relevant.
Completion Checklist
First-party package approved in an issue
Official OpenAPI specification reviewed, or its absence documented
API specification checked against documentation and real responses
Comparable current provider implementation selected
Repository package created at version 2.0.0
Package, TypeScript, build, test, provenance, and documentation configuration added
Provider factory implements ProviderV4
Supported model classes and public option types implemented
Workflow serialization implemented for every model class
