openresponses/openresponses

Health v2 · maintenance only

Flags: no_releases

Adoption not part of the score

1100 stars · 66 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Open Responses is an open-source specification for multi-provider, interoperable LLM interfaces modeled on the OpenAI Responses API, defining a shared request/response schema, semantic streaming events, and tool invocation patterns. The repo ships the OpenAPI spec, documentation, and a compliance test suite (web UI and CLI) for validating provider implementations.

Use cases

• build LLM apps that work across multiple model providers
• validate my LLM API against the OpenAI Responses API spec
• implement a provider-compatible responses endpoint
• standardize tool calling and streaming across LLM vendors
• run compliance tests on my inference server in CI
• avoid vendor lock-in for LLM API integrations

When to choose

• you want one schema that maps to many LLM providers
• you're building an agentic workflow with consistent streaming and tool calls
• you need to verify your API's compatibility with the Responses API shape
• you want an extensible spec that accommodates provider-specific features

When to avoid

• you only call a single provider's SDK directly and don't need portability
• you need a full inference runtime or model server rather than a specification
• you depend on provider-specific features outside the spec's core schema

Facets

framework · maturity active

llm-inference agent-framework api-framework testing sdk large-language-models apis developer-tools bun cross-platform openai-responses-api openapi-specification llm-interoperability multi-provider streaming-events tool-calling compliance-testing specification ai-agents nodejs web-server

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