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## Upload¶
¶
**post** `/v1/files`¶
¶
Upload File¶
¶
### Header Parameters¶
¶
- `"anthropic-beta": optional array of AnthropicBeta`¶
¶
Optional header to specify the beta version(s) you want to use.¶
¶
- `UnionMember0 = string`¶
¶
- `UnionMember1 = "message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 212 more`¶
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- `"message-batches-2024-09-24"`¶
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- `"prompt-caching-2024-07-31"`¶
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- `"computer-use-2024-10-22"`¶
¶
- `"computer-use-2025-01-24"`¶
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- `"pdfs-2024-09-25"`¶
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- `"token-counting-2024-11-01"`¶
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- `"token-efficient-tools-2025-02-19"`¶
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- `"output-128k-2025-02-19"`¶
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- `"files-api-2025-04-14"`¶
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- `"mcp-client-2025-04-04"`¶
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- `"mcp-client-2025-11-20"`¶
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- `"dev-full-thinking-2025-05-14"`¶
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- `"interleaved-thinking-2025-05-14"`¶
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- `"code-execution-2025-05-22"`¶
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- `"extended-cache-ttl-2025-04-11"`¶
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- `"context-1m-2025-08-07"`¶
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- `"context-management-2025-06-27"`¶
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- `"model-context-window-exceeded-2025-08-26"`¶
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- `"skills-2025-10-02"`¶
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- `"fast-mode-2026-02-01"`¶
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- `"output-300k-2026-03-24"`¶
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- `"user-profiles-2026-03-24"`¶
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- `"advisor-tool-2026-03-01"`¶
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- `"managed-agents-2026-04-01"`¶
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- `"cache-diagnosis-2026-04-07"`¶
¶
### Returns¶
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- `FileMetadata = object { id, created_at, filename, 5 more }`¶
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- `id: string`¶
¶
Unique object identifier.¶
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The format and length of IDs may change over time.¶
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- `created_at: string`¶
¶
RFC 3339 datetime string representing when the file was created.¶
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- `filename: string`¶
¶
Original filename of the uploaded file.¶
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- `mime_type: string`¶
¶
MIME type of the file.¶
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- `size_bytes: number`¶
¶
Size of the file in bytes.¶
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- `type: "file"`¶
¶
Object type.¶
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For files, this is always `"file"`.¶
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- `"file"`¶
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- `downloadable: optional boolean`¶
¶
Whether the file can be downloaded.¶
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- `scope: optional BetaFileScope`¶
¶
The scope of this file, indicating the context in which it was created (e.g., a session).¶
¶
- `id: string`¶
¶
The ID of the scoping resource (e.g., the session ID).¶
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- `type: "session"`¶
¶
The type of scope (e.g., `"session"`).¶
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- `"session"`¶
¶
### Example¶
¶
```http¶
curl https://api.anthropic.com/v1/files \¶
-H 'Content-Type: multipart/form-data' \¶
-H 'anthropic-version: 2023-06-01' \¶
-H 'anthropic-beta: files-api-2025-04-14' \¶
-H "X-Api-Key: $ANTHROPIC_API_KEY" \¶
-F 'file=@/path/to/file'¶
```¶
Unified Diff
--- a/api/beta/files/upload.md
+++ b/api/beta/files/upload.md
@@ -12,7 +12,7 @@
- `UnionMember0 = string`
- - `UnionMember1 = "message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 21 more`
+ - `UnionMember1 = "message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 22 more`
- `"message-batches-2024-09-24"`
@@ -61,6 +61,8 @@
- `"advisor-tool-2026-03-01"`
- `"managed-agents-2026-04-01"`
+
+ - `"cache-diagnosis-2026-04-07"`
### Returns