Bilibili Video Subtitle Details

Name: Bilibili Video Subtitle Details
Price: 0.0015 USD
Availability: InStock
Author: Bilibili

https://api.sandbase.ai/v1/api/bilibili/web/video-subtitle

Returns subtitle data for a specified Bilibili video based on its video ID and CID. Helps retrieve available caption tracks and related metadata.

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Price: $0.0015USD / callFirst 100 calls per day free (shared per organization)
Method: POST
Response: JSON
Parameters: 2 required · 0 optional

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Playground

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Input

A Id(string)

Video id

C Id(string)

Video cid

OutputExample

Responseoutputs · 1.0 KB · 25 lines

[
  {
    "data": {
      "allow_submit": false,
      "font_size_type": 0,
      "lan": "",
      "lan_doc": "",
      "subtitle_position": null,
      "subtitles": [
        {
          "ai_status": 2,
          "ai_type": 0,
          "id": 1689850260387946200,
          "id_str": "1689850260387946240",
          "is_lock": false,
          "lan": "ai-zh",
          "lan_doc": "中文",
          "subtitle_url": "//aisubtitle.hdslb.com/bfs/ai_subtitle/prod/1140060817394522840048445829058a24de68ec57ef3a7c4ccbbd139b?auth_key=1787218445-49f99e66f1fd4e339748e2caae8ae793-0-210c99e3de5bfc93303f4ccf3635c042",
          "subtitle_url_v2": "//subtitle.bilibili.com/S%13%1BP.%1D%28%29X%2CR%5Ej%1F%25w%0E%02H%5EHO4%14%7B4%08K@%3C%7B%00M%0B%0A%1AM%08%056N6$%0C0&%02%1E%01%09%0E%1A2V~%15AX%16EYSA_%0Cw%1A%5C%5Et%17TRYXQV%5DYQ%0FzvMa3%5COJ%1CJM3%1Az%13%10%0E%15%12%5E%08D%0B%5C%2CL%0D%5Du%16%02?auth_key=1787218445-49f99e66f1fd4e339748e2caae8ae793-0-210c99e3de5bfc93303f4ccf3635c042",
          "type": 1
        }
      ]
    }
  }
]

Examples

Select an example to load its inputs and result into the playground.

Model card

Specifications

Pricing

Base price: $0.0015 / run
Daily free calls: First 100 calls per day free (shared per organization)

Request & response

Method: POST
Request body: application/json
Response: application/json
Execution: sync

Parameters

a_id: string · required
c_id: string · required

Access

Provider: Bilibili
API: Platform API
Base URL: https://api.sandbase.ai
Endpoint: /v1/api/bilibili/web/video-subtitle
Authentication: Bearer API key

API README

Bilibili Video Subtitle Details API

Retrieve subtitle information for a Bilibili video by providing the video ID in a_id and the specific part CID in c_id.

Use cases

Extract caption tracks for video transcription and translation workflows.
Display synchronized subtitles in custom video players.
Inspect available subtitle languages and formats for a given video clip.

Request

curl -X POST "https://api.sandbase.ai/v1/api/bilibili/web/video-subtitle" \
  -H "Authorization: Bearer $SANDBASE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"a_id": "114006081739452", "c_id": "28400484458"}'

Parameters

Name	Type	Required	Description
`a_id`	string	Yes	Video id
`c_id`	string	Yes	Video cid

Notes

Both a_id and c_id are required to pinpoint the exact video part.

Related APIs

Bilibili Streaming Areas: Returns the complete list of streaming broadcast areas and categories on Bilibili.
Bilibili BV to AID Converter: Converts a Bilibili BV identifier to its corresponding numeric AID value.
Bilibili User Collection Folders: Returns the collection folders owned by a specific Bilibili user.

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Platform API endpoint with unified authentication and usage tracking.

Production API

Platform API endpoint

https://api.sandbase.ai/v1/api/bilibili/web/video-subtitle

Authorization header

Authorization: Bearer $SANDBASE_API_KEY

# The quoted heredoc keeps Unicode and shell metacharacters unchanged.
result=$(curl --fail-with-body --silent \
  -X POST "https://api.sandbase.ai/v1/api/bilibili/web/video-subtitle" \
  -H "Authorization: Bearer $SANDBASE_API_KEY" \
  -H "Content-Type: application/json" \
  --data-binary @- <<'SANDBASE_JSON'
{
  "a_id": "114006081739452",
  "c_id": "28400484458"
}
SANDBASE_JSON
)
printf '%s\n' "$result"

Explore more

Related APIs

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API	Price	Response	Released
Bilibili Video Subtitle DetailsThis API `Bilibili`	$0.0015 per call	JSON	Jul 31, 2026
Bilibili Streaming Areas `Bilibili`	$0.0015 per call	JSON	Jul 31, 2026
Bilibili BV to AID Converter `Bilibili`	$0.0015 per call	JSON	Jul 31, 2026
Bilibili User Collection Folders `Bilibili`	$0.0015 per call	JSON	Jul 31, 2026
Bilibili Comprehensive Popular Videos `Bilibili`	$0.0015 per call	JSON	Jul 31, 2026
Bilibili Comment Replies `Bilibili`	$0.0015 per call	JSON	Jul 31, 2026

Questions

FAQ

How do I use the Bilibili Video Subtitle Details API?

Send a POST request to https://api.sandbase.ai/v1/api/bilibili/web/video-subtitle with your SandBase API key in the Authorization header (Bearer) and the parameters as a JSON body. You can also try it in the Playground on this page without writing code.

How much does the Bilibili Video Subtitle Details API cost?

$0.0015 per call. Every organization gets 100 free calls per UTC day, shared across eligible SandBase APIs including this one; after that each call is billed at this price from your SandBase balance. There is no subscription.

What parameters does the Bilibili Video Subtitle Details API accept?

Required: a_id (string) and c_id (string). The Parameters table and the Playground on this page list every field.

What does the Bilibili Video Subtitle Details API return?

A JSON response returned in the same HTTP request (synchronous).

Do I need a Bilibili developer account or API key?

No. Bilibili Video Subtitle Details runs through SandBase, so one SandBase API key covers this endpoint and every other API and model in the catalog. You do not need to apply for Bilibili API access separately.