> ## Documentation Index
> Fetch the complete documentation index at: https://www.pickfu.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# PickFu's panel and response quality

> Who PickFu's respondents are, where they come from, how response quality is kept high, and how to flag a low-quality response from the MCP server or REST API.

Every PickFu response comes from a **verified consumer** — a real, identity-verified person who answers under a strict NDA. Respondents are sourced from enterprise-grade research panels (the same professional panels large companies use for consumer research) and quality-checked through a multi-stage AI and human review process.

<img className="block dark:hidden" src="https://mintcdn.com/pickfu/GnmD0rCIqyZvqzke/images/response-quality-pipeline-light.svg?fit=max&auto=format&n=GnmD0rCIqyZvqzke&q=85&s=c00ff8831cc0d166e872461bf913d41b" alt="How PickFu keeps response quality high: a verified respondent gives an honest answer with a required written explanation, which passes multi-stage AI and human review; low-quality responses are filtered out (including ones you flag), leaving trusted results." noZoom width="1040" height="248" data-path="images/response-quality-pipeline-light.svg" />

<img className="hidden dark:block" src="https://mintcdn.com/pickfu/GnmD0rCIqyZvqzke/images/response-quality-pipeline-dark.svg?fit=max&auto=format&n=GnmD0rCIqyZvqzke&q=85&s=fa02d932bb0ec265a10ca15a67cff9e7" alt="How PickFu keeps response quality high: a verified respondent gives an honest answer with a required written explanation, which passes multi-stage AI and human review; low-quality responses are filtered out (including ones you flag), leaving trusted results." noZoom width="1040" height="248" data-path="images/response-quality-pipeline-dark.svg" />

## Where respondents come from

* **Enterprise-grade panel partners** — established consumer-research panels, not an open or self-serve crowd.
* **15 countries**, each answering in their native language:
  * **English:** United States, Canada, United Kingdom, Australia, South Africa
  * **Europe:** France, Germany, Italy, Spain, Poland, Sweden
  * **Americas:** Brazil, Mexico
  * **Asia-Pacific:** Japan, Korea
* Questions auto-translate into the respondent's language, and their answers translate back into yours.

## How PickFu keeps quality high

* **Identity verification** — panel partners verify each respondent's identity and demographics at signup.
* **Multi-stage filtering** — a mix of AI and human curation reviews responses for quality.
* **A required "why"** — every respondent must type a written explanation for their choice before they can submit, which filters out low-effort answers by design (see [how surveys work](/docs/guides/surveys-overview)).
* **Ongoing enforcement** — respondents who consistently provide low-quality feedback are removed from the panel, and regular quality assessments run across all 15 countries.

## Flag a low-quality response

If a specific response still looks low-effort or off-topic, flag it. Marking a response **not helpful** flags it for review, feeds PickFu's panel-quality enforcement, and may auto-reject the response. You can do this programmatically:

<Tabs>
  <Tab title="MCP server">
    Ask your AI assistant to rate the response — it uses the `rate_response` tool:

    > "Rate that last response as not helpful — it's off-topic."
  </Tab>

  <Tab title="REST API">
    ```bash theme={null}
    curl -X POST https://api.pickfu.com/v1/responses/{id}/rate \
      -H "Authorization: Bearer $PICKFU_API_KEY" \
      -H "Content-Type: application/json" \
      -d '{"rating": "not_helpful", "comment": "off-topic / low effort"}'
    ```

    Use `"rating": "helpful"` for the positive signal, and `DELETE /v1/responses/{id}/rate` to remove a rating.
  </Tab>
</Tabs>

<Note>
  Flagging is currently available through the **MCP server** and **REST API**. There's a per-survey cap on how many responses you can flag, and a response with no associated respondent can't be flagged.
</Note>

## Learn more

<CardGroup cols={2}>
  <Card title="Who are PickFu's respondents?" icon="users" href="https://help.pickfu.com/en/articles/1984352-who-are-pickfu-s-respondents">
    Full Help Center article on the panel, locations, and authenticity.
  </Card>

  <Card title="Rate responses (in-app)" icon="thumbs-up" href="https://help.pickfu.com/en/articles/2000861-how-do-i-rate-respondent-comments-as-helpful-or-not-helpful">
    How rating helpful / not helpful works from the results page.
  </Card>

  <Card title="How surveys work" icon="clipboard-question" href="/docs/guides/surveys-overview">
    Question types, targeting, and the built-in written explanation.
  </Card>

  <Card title="API reference" icon="code" href="/docs/api-reference/introduction">
    The full `POST /responses/{id}/rate` endpoint and parameters.
  </Card>
</CardGroup>