> ## Documentation Index
> Fetch the complete documentation index at: https://docs.r28.ai/charter/llms.txt
> Use this file to discover all available pages before exploring further.

# research_similar_papers

> Find related papers by semantic intent and structural mode.

<div className="tool-route"><span className="tool-row-method" data-method="GET">GET</span><code>{"https://api.firecrawl.dev/v2/search/research/papers/{id}/similar"}</code></div>

```python firecrawl_research_similar_papers.py theme={null}
from charter.packs import firecrawl

result = await firecrawl.research_similar_papers.ainvoke({"id": ..., "intent": ...})
```

## Path parameters

<div className="reference-table">
  | Field                                                      | Type     | Description                   |
  | ---------------------------------------------------------- | -------- | ----------------------------- |
  | `id` <span className="required" title="required">\*</span> | `string` | Primary seed paper reference. |
</div>

## Query parameters

<div className="reference-table">
  | Field                                                          | Type                                                                                 | Description                                                                                                                                  |
  | -------------------------------------------------------------- | ------------------------------------------------------------------------------------ | -------------------------------------------------------------------------------------------------------------------------------------------- |
  | `intent` <span className="required" title="required">\*</span> | `string`                                                                             | Natural-language ranking/filtering intent used for semantic ranking. <span className="field-constraints">min length 1</span>                 |
  | `mode`                                                         | [ResearchSimilarMode](/charter/charter/packs/firecrawl/research/objects#researchsimilarmode) | Structural expansion mode. The server applies 'similar' when this is absent.                                                                 |
  | `k`                                                            | `integer`                                                                            | Maximum number of related papers to return. The server applies 40 when this is absent. <span className="field-constraints">≥ 1; ≤ 500</span> |
  | `rerank`                                                       | `boolean`                                                                            | Apply an additional rerank over fused candidates.                                                                                            |
  | `anchor`                                                       | `string`                                                                             | Additional seed paper reference. Repeat this parameter for multiple anchors.                                                                 |
</div>