Create parts

Answers presigned PUT URLs for some parts of a multipart upload, at most 64 a call, each valid for minutes: mint them as the upload reaches them.

POST /v1/s3/buckets/{bucket}/uploads/{upload}/parts

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Address	`https://api.hanzo.ai/v1/s3/buckets/{bucket}/uploads/{upload}/parts`
Method	`POST`
Operation	`post_s3_buckets_by_bucket_uploads_by_upload_parts`
Auth	`Authorization: Bearer $HANZO_API_KEY`

Answers presigned PUT URLs for some parts of a multipart upload, at most 64 a call, each valid for minutes: mint them as the upload reaches them. PUT a part's bytes to its URL as they are — no headers are signed — and the store answers the part's ETag, which completing does not need.

Request

6 fields, body application/json (required).

Field	In	Type	Required	Description
`bucket`	path	string	yes	Bucket is the bucket, from the path.
`upload`	path	string	yes	Upload is the upload's id, from the path.
`bucket`	body	string	—	Bucket is the bucket, from the path.
`key`	body	string	—	Key is the object key the upload was started on.
`parts`	body	integer (int64)[]	—	Parts are the part numbers to mint URLs for, from 1.
`upload`	body	string	—	Upload is the upload's id, from the path.

Response

Status	Body	Meaning
`200`	s3.partURLs	ok
`default`	problem-details	refused

200 body — 4 fields.

Field	In	Type	Always	Description
`expiresIn`	body	integer (int64)	—	Expiry is how many seconds the URLs stay valid.
`urls`	body	s3.partURL[]	—	URLs are one presigned PUT per part asked for.
`urls[].part`	body	integer (int64)	—	Part is the part number.
`urls[].url`	body	string	—	URL is the presigned address to PUT the part's bytes to, directly.

Failure carries the platform error shape — see Errors.

Examples

CLI

SDK

HTTP

MCP

hanzo has no subcommand for this operation — the CLI serves only what cloud's live route table confirms. Use HTTP or an SDK.

.ts

.py

.go

.rs

.java

import { Configuration, S3Api } from 'hanzoai';

const api = new S3Api(new Configuration({ accessToken: process.env.HANZO_API_KEY }));
const { data } = await api.postS3BucketsByBucketUploadsByUploadParts({ bucket: 'bucket', upload: 'upload', bucket: "<bucket>", key: "<key>" });

from hanzoai.cloud import ApiClient, Configuration
from hanzoai.cloud.api import S3Api

client = ApiClient(Configuration(access_token=os.environ["HANZO_API_KEY"]))
result = S3Api(client).post_s3_buckets_by_bucket_uploads_by_upload_parts(bucket='bucket', upload='upload', bucket="<bucket>", key="<key>")

cfg := hanzoai.NewConfiguration()
cfg.AddDefaultHeader("Authorization", "Bearer "+os.Getenv("HANZO_API_KEY"))
client := hanzoai.NewAPIClient(cfg)

resp, _, err := client.S3API.PostS3BucketsByBucketUploadsByUploadParts(context.Background()).Execute()
if err != nil {
	return err
}

use hanzo_client::apis::{configuration::Configuration, s3_api};

let mut cfg = Configuration::new();
cfg.bearer_access_token = std::env::var("HANZO_API_KEY").ok();

let result = s3_api::post_s3_buckets_by_bucket_uploads_by_upload_parts(&cfg, Default::default()).await?;

import ai.hanzo.cloud.ApiClient;
import ai.hanzo.cloud.api.S3Api;

ApiClient client = new ApiClient();
client.setBearerToken(System.getenv("HANZO_API_KEY"));

var result = new S3Api(client).postS3BucketsByBucketUploadsByUploadParts();

curl -X POST https://api.hanzo.ai/v1/s3/buckets/<bucket>/uploads/<upload>/parts \
  -H "Authorization: Bearer $HANZO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
       "bucket": "<bucket>",
       "key": "<key>"
     }'

MCP reaches s3 through the s3 tool, which names its 6 operations with its own verbs — this one among them, under a name only MCP declares. describe explains any of them:

curl -X POST https://api.hanzo.ai/v1/mcp \
  -H "Content-Type: application/json" \
  -d '{
       "jsonrpc": "2.0",
       "id": 1,
       "method": "tools/call",
       "params": {
         "name": "describe",
         "arguments": {
           "op": "list_s3_buckets"
         }
       }
     }'

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