---
title: "Find related papers"
method: GET
path: "/search/research/papers/{id}/similar"
tags: ["Research"]
---

# Find related papers

`GET /search/research/papers/{id}/similar`

## Path parameters

- `id` string, required

## Query parameters

- `intent` string, required
- `mode` 'similar' | 'citers' | 'references'
- `k` integer
- `rerank` boolean
- `anchor` string

## Response `200`

Ranked related papers.

- ResearchSimilarPapersResponse
  - `success` boolean, required
  - `results` ResearchPaperResult[], required
    - `paperId` string, required — Canonical paper id, or web:<url> for SERP-discovered display results.
    - `primaryId` string, required — Preferred cite/fetch id such as arxiv:<id>, pmid:<id>, pmcid:<id>, or doi:<id>.
    - `ids` ResearchIdMap — Source identifiers grouped by namespace.
    - `title` string, required
    - `abstract` string, required
    - `score` number, double, required
    - `signals` ResearchPaperSignals
      - `structural` number, double, required — Raw structural graph signal.
      - `semantic` number, double, required — Semantic score from the intent search.
      - `articleRank` number, double, required — Structural expansion article-rank score.
      - `seedOverlap` integer, required — Number of distinct seeds connected to this candidate.
  - `poolSize` integer, required
  - `truncated` boolean, required
  - `note` string, nullable

## Other responses

- `400` — Invalid request
- `401` — Missing or invalid bearer token
- `429` — Rate limit exceeded
- `500` — Internal server error

---

[API](https://skmtc.dev/firecrawl/apis/firecrawl-api.md) · [All operations](https://skmtc.dev/firecrawl/apis/firecrawl-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/firecrawl/firecrawl-api/revisions/e350fafb5a2a/schema)