Parallel

Parallel Responses API

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.

GitHub OpenAPI

Operations 1

Each operation below carries the questions people ask an LLM about it and the instructions they give an agent to run it. Generated by API Evangelist overlay

POST /v1/responses Generate a cited answer from live web research · Create Response #
Ask an LLM
“Can I get an answer with URL citations grounded in live web research using the OpenAI Responses format?”
“What does the reasoning effort setting change about how much research is done?”
Tell an agent
Generate a cited response to {input} using the {model} model.
Answer {input} with the {model} model at {reasoning} reasoning effort.

Documentation

📖
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-ai/refs/heads/main/authentication/parallel-authentication.yml

Specifications

⚙
OpenAPI
https://raw.githubusercontent.com/api-evangelist/parallel-ai/refs/heads/main/openapi/parallel-responses-api-api-openapi.yml

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OpenAPI Specification

parallel-responses-api-api-openapi.yml Raw ↑ 
openapi: 3.2.0
info:
  title: Parallel Responses API
  description: Parallel API
  contact:
    name: Parallel Support
    url: https://parallel.ai
    email: support@parallel.ai
  version: 0.1.2
servers:
- url: https://api.parallel.ai
  description: Parallel API
security:
- ApiKeyAuth: []
tags:


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# Full source: https://raw.githubusercontent.com/api-evangelist/parallel-ai/refs/heads/main/openapi/parallel-responses-api-api-openapi.yml