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.
Parallel Web Systems Responses API is one of 8 APIs that Parallel Web Systems publishes on the 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.
This API exposes
1 operation
across 1 path,
and defines 43 schemas.
It is described by OpenAPI 3.2.0, at version 0.1.2.
Requests are made against a single base URL, https://api.parallel.ai.
1 operations1 paths43 schemas1 POST
Metadata
The identity and technical contract details declared by the specification.
Parallel Web Systems Responses API declares
1 security scheme
for authenticating requests.
An API key is passed in the header as x-api-key (ApiKeyAuth).
By default, every request must be authenticated.
Paths & Operations 1
Across 1 path, the API surfaces 1 operation — 1 POST. Each is listed below with its method, path, parameters, and response codes.
Responses API 1
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 S…
POST
/v1/responses
Create Response
create_response_v1_responses_postbody→ 200422
Schemas 43
The contract defines 43 schemas that model the data the API accepts and returns. The most detailed are Response (33 properties), ResponseCreateRequest (9 properties), ResponseOutputTextAnnotationAddedEvent (7 properties), ResponseTextDeltaEvent (7 properties). Each schema is shown below with its type and property counts.
A logprob is the logarithmic probability that the model assigns to producing a particular token at a given position in the sequence. Less-negative (higher) log…
3 properties2 required
HTTPValidationError
object
1 property
IncompleteDetails
object
Details about why the response is incomplete.
1 property
ModerationInputModerationResult
object
A moderation result produced for the response input or output.
6 properties6 required
ResponseOutputMessage
object
An assistant message produced by the model.
6 properties5 required
ResponseOutputText
object
A text content part of an output message. annotations carries the URL citations grounding the answer.
4 properties3 required
ModerationInputError
object
An error produced while attempting moderation for the response input or output.
JSON object response format. An older method of generating JSON responses. Using jsonschema is recommended for models that support it. Note that the model will…
1 property1 required
ResponseTextConfig
object
Text output configuration. By default the response is plain text; for structured output set format to {"type": "jsonschema", "name": ..., "schema": {...}}. The…
2 properties
AnnotationURLCitation
object
A citation for a web resource used to generate a model response.
5 properties5 required
InputTokensDetails
object
A detailed breakdown of the input tokens.
1 property1 required
ResponseCreatedEvent
object
3 properties3 required
Response
object
A response from the parallel model. A completed response contains a single assistant message whose text is annotated with URL citations grounding the answer.
33 properties5 required
ResponseInputContentPart
object
A single content part of a message, e.g. {"text": "hi", "type": "inputtext"}. Only text parts are supported; requests containing image, audio, or file parts fa…
2 properties
ResponseOutputTextAnnotationAddedEvent
object
7 properties7 required
ResponseTextDeltaEvent
object
Emitted when there is an additional text delta.
7 properties7 required
ResponseFailedEvent
object
3 properties3 required
ResponseError
object
Details of a failed response.
2 properties2 required
ResponseCreateRequest
object
Request body for the Responses API (POST /v1/responses). OpenAI-Responses-compatible: point a standard OpenAI client at https://api.parallel.ai/v1 with your Pa…
9 properties2 required
ResponseFormatText
object
Default response format. Used to generate text responses.
A logprob is the logarithmic probability that the model assigns to producing a particular token at a given position in the sequence. Less-negative (higher) log…
3 properties2 required
ResponseInputMessage
object
A single input message for the Responses API. content accepts either a bare string ("hi") or the canonical OpenAI list-of-parts ([{"text": "hi", "type": "input…
2 properties2 required
Specification
The full machine-readable OpenAPI contract behind this narrative.
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