---
title: "Answer a question from live web search results, with the sources the answer was grounded in."
method: POST
path: "/v2/ops/web.answer"
tags: ["web"]
---

# Answer a question from live web search results, with the sources the answer was grounded in.

`POST /v2/ops/web.answer`

## Request

- Base URL: `https://api.agentkey.app`
- URL: `https://api.agentkey.app/v2/ops/web.answer`
- Auth: HTTP bearer

Searches the web for the question and returns an engine-written answer plus the source pages it was grounded in (title, url, passage). Not a result list — use web.search for that. include_domains / exclude_domains / time_range route to an engine that supports them.

Fixed price: 1.1 credits per successful call, whichever provider serves it.

## Request body

- object
  - `country` string: ISO 3166-1 alpha-2 country code to bias the search, e.g. US, CN.
  - `exclude_domains` string[]: Exclude sources from these domains (routes to an engine that supports it).
  - `fields` string[]: Projection: keep only these dotted paths of data, e.g. ["items.id", "items.text"].
  - `include_domains` string[]: Restrict sources to these domains (routes to an engine that supports it).
  - `include_raw` boolean: Attach the raw upstream payload as `raw` (not a stable contract; truncated above 256 KB).
  - `lang` string: BCP 47 language tag for the answer and the sources, e.g. en, zh-Hans.
  - `provider` string: Shorthand for routing.only = [provider].
  - `query` string, required: The question, in natural language.
  - `routing` Routing: Provider routing override. order: try these providers first; only: restrict to these (equivalent to pinning); allow_fallbacks: false tries only the first eligible provider.
    - `allow_fallbacks` boolean: false = try only the first eligible provider.
    - `only` string[]: Restrict to these providers.
    - `order` string[]: Providers to try first, in order.
    - `strategy` 'auto': How eligible providers are ordered. auto = the method's curated order. fastest / stable / popular are specified but not implemented yet (400 until then). The price is fixed whatever the strategy; mutually exclusive with order.
  - `time_range` 'day' | 'week' | 'month' | 'year' | 'all': Only ground the answer in pages published within this window.

## Response `200`

Success envelope

- AnswerEnvelope: Success envelope whose data is a Answer.
  - `attempts` Attempt[], required
    - `error_type` string: validation | not_found | rate_limit | timeout | upstream_unauthorized | upstream_unavailable | provider_error
    - `provider` string, required: Provider slug.
    - `refunded` boolean: true when the reservation for this attempt was refunded.
    - `status` integer, required: HTTP status AgentKey mapped this attempt to (200 on success).
    - `took_ms` integer, required
    - `tool` string, required: Registry tool name (Provider/operation) that was called.
    - `upstream_status` integer: The provider's real HTTP status; absent when nothing was received.
  - `credits_charged` number, required: Credits charged for this call (the method's fixed price).
  - `data` object, required: A natural-language answer to a question, grounded in web sources.
    - `answer` string, required: The answer text as plain text / light markdown. Inline citation markers, when the engine emits them, are kept as-is.
    - `sources` object[], nullable, required: Web sources the answer was grounded in, best first. null when the engine does not expose its sources.
      - `snippet` string, nullable, required: The passage of the source the engine used, when exposed.
      - `title` string, nullable, required: Source page title.
      - `url` string, required: Source URL.
  - `op` string, required: Method name.
  - `op_version` integer, required: Method version that served the call.
  - `provider` string, required: Provider that actually served the call.
  - `raw` unknown
  - `raw_truncated` boolean
  - `request_id` string, required: Correlation id; quote it in support requests.
  - `took_ms` integer, required
  - `unsupported_fields` string[], required: Output paths this provider structurally does not supply; such fields are null for a different reason than 'missing on this record'.

## Other responses

- `400`: Validation error (unknown field, bad cursor, bad routing)
- `402`: Insufficient credits
- `404`: Not found (method, or upstream object)
- `429`: Rate limited upstream
- `502`: All providers failed
- `504`: Timed out

---

[API](https://skmtc.dev/agentkey/apis/agentkey-scenario-methods.md) - [All operations](https://skmtc.dev/agentkey/apis/agentkey-scenario-methods/llms.txt) - [OpenAPI document](https://skmtc.dev/agentkey/apis/agentkey-scenario-methods/revisions/a7cf5b682fdd?raw)