Ark API
Canonical page on the main site: sinoaihub.com/api/ark
Type
api
Definition
Ark API is ByteDance's official API platform (endpoint https://ark.cn-beijing.volces.com/api/v3).
Key facts
- Endpoint: https://ark.cn-beijing.volces.com/api/v3
- Authentication: API key (Bearer token); AK/SK also documented for the chat API
- Capabilities: streaming, tool calling, structured output, vision
- Rate limits: Flagship Doubao models: 500 RPM / 1,000,000 TPM (as of 2026-09-20)
Provider
Api Type
official
Endpoint
https://ark.cn-beijing.volces.com/api/v3
Authentication
API key (Bearer token); AK/SK also documented for the chat API
Streaming
Yes
Tool Calling
Yes
Structured Output
Yes
Vision
Yes
Context Limits
| model | input_limit | output_limit |
|---|---|---|
| doubao-seed-2-1-pro | 1048576 | 262144 |
| doubao-seed-evolving | 1048576 | 262144 |
| doubao-seed-2-1-turbo | 262144 | 262144 |
Rate Limits
Flagship Doubao models: 500 RPM / 1,000,000 TPM (as of 2026-09-20)
Regions
- china
Cloud Providers
- Volcengine
Pricing Ref
Documentation
https://docs.volcengine.com/docs/ark
Limitations
- Function calling support for Ark-hosted models is documented per-model, not platform-wide; not extracted as of 2026-09-27
Verification Status
verified
API Changes
No documented API changes on record as of 2026-09-29.
Last Verified
2026-09-20
Source history
No documented source-change events located as of 2026-09-20.
Sources
| evidence_id | source_name | source_url | source_type | published | verified | confidence | conflict |
|---|---|---|---|---|---|---|---|
| src-apis-ark-1 | Ark product overview (base URL, auth) | https://docs.volcengine.com/docs/ark/product-overview?lang=zh | Official documentation | — | 2026-09-20 | high | — |
| src-apis-ark-2 | Ark Responses API reference | https://docs.volcengine.com/docs/ark/responses-api-text-generation?lang=zh | Official documentation | — | 2026-09-20 | high | — |
| src-apis-ark-3 | Ark Chat API reference | https://docs.volcengine.com/docs/ark/chat-api?lang=zh | Official documentation | — | 2026-09-20 | high | — |