quickS3

Create upload URL

create_upload_url

Idempotent

Create a short-lived presigned upload URL (valid 15 minutes) for one object. Upload the file directly to your storage provider with an HTTP PUT to the returned url, sending every header in the returned headers (e.g. curl -H "x-ms-blob-type: BlockBlob" -T localfile "<url>" for Azure). Uploads fail without those headers. quickS3 never sees or stores the file contents.

Input Schema

TableJSON Schema

Name	Required	Description
`key`	Yes	Object key to write, e.g. "reports/2026/q3.csv"
`size`	Yes	File size in bytes
`bucket`	Yes	Bucket name
`overwrite`	No	Allow replacing an existing object (default false)
`contentType`	No	Content type of the file, e.g. "text/csv"
`connectionId`	Yes	Connection ID from list_connections

Output Schema

TableJSON Schema

Name	Required	Description	Default
`url`	Yes
`method`	Yes
`headers`	Yes
`maxBytes`	Yes
`expiresAt`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedSep 16, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "additionalProperties": false,
+  "properties": {
+    "expiresAt": {
+      "type": "string"
+    },
+    "headers": {
+      "additionalProperties": {
+        "type": "string"
+      },
+      "propertyNames": {
+        "type": "string"
+      },
+      "type": "object"
+    },
+    "maxBytes": {
+      "type": "number"
+    },
+    "method": {
+      "type": "string"
+    },
+    "url": {
+      "type": "string"
+    }
+  },
+  "required": [
+    "url",
+    "method",
+    "headers",
+    "expiresAt",
+    "maxBytes"
+  ],
+  "type": "object"
+}

First observedSep 16, 2026

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