# Parallel Responses API

**Canonical:** https://apis.io/apis/parallel/parallel-responses-api-api/  
**Provider:** Parallel — https://apis.io/providers/parallel/  
**Base URL:** https://api.parallel.ai  
**Documentation:** https://docs.parallel.ai/getting-started/overview

Parallel Responses API is one of 8 APIs that [Parallel](https://apis.io/providers/parallel/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Responses API. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, an API reference, a getting-started guide, and authentication docs.

An OpenAI-Responses-compatible interface for answers grounded in live web research, with URL citations. Point any Responses-API client — the OpenAI Python SDK, OpenAI TypeScript SDK, the Agents SDK, or raw HTTP — at `https://api.parallel.ai` with your Parallel API key, set `model` to `parallel`, and call `/v1/responses`. - `input` accepts a plain string or an array of role/content messages (canonical OpenAI shape; text content only). - `reasoning.effort` (`low`/`medium`/`high`) controls how much research is performed, trading response time for answer quality. - Multi-turn via `previous_response_id`. - Structured outputs via `text.format = {"type": "json_schema", "name": ..., "schema": {...}}`. - Streaming (`stream=true`) emits the standard OpenAI Responses SSE lifecycle: `response.created` and `response.in_progress`, then output item / content part / text delta events with URL-citation annotations, the matching `*.done` events, and a terminal `response.completed` — or `response.failed` if the request fails mid-stream.

## Machine-readable artifacts (5)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/parallel/refs/heads/main/openapi/parallel-responses-api-api-openapi.yml
- **Documentation** — https://docs.parallel.ai/responses-api/responses-quickstart
- **APIReference** — https://docs.parallel.ai/api-reference
- **GettingStarted** — https://docs.parallel.ai/getting-started/overview
- **Authentication** — https://raw.githubusercontent.com/api-evangelist/parallel/refs/heads/main/authentication/parallel-authentication.yml

## Other Parallel APIs (7)

- [Parallel Chat API (Beta) API](https://apis.io/apis/parallel/parallel-chat-api-beta-api/)
- [Parallel Extract API](https://apis.io/apis/parallel/parallel-extract-api/)
- [Parallel FindAll API](https://apis.io/apis/parallel/parallel-findall-api/)
- [Parallel Monitor API](https://apis.io/apis/parallel/parallel-monitor-api/)
- [Parallel Search API](https://apis.io/apis/parallel/parallel-search-api/)
- [Parallel Tasks API](https://apis.io/apis/parallel/parallel-tasks-api/)
- [Parallel Memory API](https://apis.io/apis/parallel/parallel-memory-api/)

## Tags

Responses API

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/parallel/parallel-responses-api-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/parallel/.