---
title: "Get Evidence By References"
method: POST
path: "/evidence/by_references"
---

# Get Evidence By References

`POST /evidence/by_references`

## Request

- Base URL: `https://api.traversal.com` (the document declares no server; this is the origin it was published from)
- URL: `https://api.traversal.com/evidence/by_references`
- Auth: none declared

Fetch evidence items by their references (tool_call_id + evidence_id).

This endpoint is optimized for batch fetching:
- Groups references by tool_call_id
- Fetches each S3 bundle once
- Filters to requested evidence UUIDs

Args:
    request: Contains session_id and list of evidence references
    authorized_user: Authorized user dependency

Returns:
    JSONResponse with evidence dict mapping evidence_id to enriched evidence

## Request body

- EvidenceByReferencesRequest: Request to fetch evidence items by their references.
  - `session_id` string, required
  - `references` EvidenceReferenceRequest[], required
    - `toolCallId` string, required
    - `evidenceId` string, required
    - `sourceSessionId` string, nullable

## Response `200`

Successful Response

- unknown

## Other responses

- `422`: Validation Error

## Changes

> 66 revisions in range; 9 not diffed.

- **2026-09-01** `16ecc819c413`: 2 breaking, 2 warning, 1 info
  - added the new required request property `references/items/evidenceId`
  - added the new required request property `references/items/toolCallId`
  - removed the request property `references/items/evidence_id`
  - removed the request property `references/items/tool_call_id`
  - …1 more

[Operation history](https://skmtc.dev/traversal/apis/traversal-api/changes/evidence/by_references/post.md)

---

[API](https://skmtc.dev/traversal/apis/traversal-api.md) - [All operations](https://skmtc.dev/traversal/apis/traversal-api/llms.txt) - [OpenAPI document](https://skmtc.dev/traversal/apis/traversal-api/revisions/31e1a8b7cf89?raw)