# Parallel Web Systems Responses API

**Canonical:** https://apis.io/apis/parallel-web-systems/parallel-web-systems-responses-api-api/  
**Provider:** Parallel Web Systems — https://apis.io/providers/parallel-web-systems/  
**Base URL:** https://api.parallel.ai  
**Documentation:** https://docs.parallel.ai/chat-api/chat-quickstart

Parallel Web Systems Responses API is one of 8 APIs that [Parallel Web Systems](https://apis.io/providers/parallel-web-systems/) 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, rate-limit docs, an API reference, and a getting-started guide.

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 (7)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/parallel-web-systems/refs/heads/main/openapi/parallel-web-systems-responses-api-api-openapi.yml
- **Conventions** — https://raw.githubusercontent.com/api-evangelist/parallel-web-systems/refs/heads/main/conventions/parallel-web-systems-conventions.yml
- **ErrorCatalog** — https://raw.githubusercontent.com/api-evangelist/parallel-web-systems/refs/heads/main/errors/parallel-web-systems-problem-types.yml
- **DataModel** — https://raw.githubusercontent.com/api-evangelist/parallel-web-systems/refs/heads/main/data-model/parallel-web-systems-data-model.yml
- **RateLimits** — https://raw.githubusercontent.com/api-evangelist/parallel-web-systems/refs/heads/main/rate-limits/parallel-web-systems-rate-limits.yml
- **APIReference** — https://docs.parallel.ai/api-reference/responses-api/create-response
- **GettingStarted** — https://docs.parallel.ai/responses-api/responses-quickstart

## Other Parallel Web Systems APIs (7)

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

## Tags

Responses API

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