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

# Source tracing

> Trace retrieved chunks to their exact location in the original source document.

export const SupportedOn = ({ui = false, api = true, sdk = true, sdkVersion = null}) => <div className="not-prose">
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        Supported on
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          UI
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          API
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<SupportedOn ui={false} api={true} sdk={false} />

<CardGroup>
  <Card title="Source tracing" icon="code" href="/flow/sdk/explainability/source-tracing">
    Trace retrieved chunks to their source document programmatically.
  </Card>
</CardGroup>

## How source tracing works

When a file is ingested into a vector database, the system records the exact location of every chunk within the source document, including its position within the heading structure and, for page-based formats, its source page. When an agent retrieves a chunk using file search, this location information travels with the result, giving you a direct path from the agent's response back to the original file.

## When to use source tracing

* **Auditability** – Verify that agent responses came directly from your uploaded documents
* **Compliance** – Produce document-level proof of origin for regulated environments
* **Chain of custody** – Follow a response from model output to the exact location in the source file

## Relationship to context attribution

Context attribution measures the degree of influence each source had on a response. Source tracing identifies where in the source document a retrieved chunk came from. They are complementary: attribution tells you what shaped the response, source tracing proves exactly where in the document it came from.