Postly MCP

Upload Media Batch

postly_upload_media_batch

Idempotent

Uploads up to 50 files with bounded concurrency and a 30-second overall deadline. Returns completed, processing, failed, not_started, or unknown for every item with its stable idempotency key. Unknown uploads may still complete; reconcile stored media or retry with the same key.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`workspace_id`	No	Destination Media Library workspace ID. Omit to use the oldest available writable workspace within this connection. Check media_library in the result for its workspace_id and registration status.
`media_uploads`	Yes

Output Schema

TableJSON Schema

Name	Required	Description	Default
`code`	No
`failed`	No
`message`	No
`results`	No
`unknown`	No
`completed`	No
`elapsed_ms`	No
`processing`	No
`not_started`	No
`all_succeeded`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed2 schema fields changedOct 10, 2026

addedInput schema / properties / media_uploads / items / properties / workspace_id

Added value: +{
+  "description": "Destination Media Library workspace ID. Omit to use the oldest available writable workspace within this connection. Check media_library in the result for its workspace_id and registration status.",
+  "type": "string"
+}

addedInput schema / properties / workspace_id

Added value: +{
+  "description": "Destination Media Library workspace ID. Omit to use the oldest available writable workspace within this connection. Check media_library in the result for its workspace_id and registration status.",
+  "type": "string"
+}

Changed1 schema field changedSep 29, 2026

addedOutput schema / properties / processing

Added value: +{
+  "items": {
+    "type": "object"
+  },
+  "type": "array"
+}

Changed4 schema fields changedSep 17, 2026

addedOutput schema / properties / elapsed_ms
```
Added value: +{
+  "type": "integer"
+}
```

addedOutput schema / properties / not_started

Added value: +{
+  "items": {
+    "type": "object"
+  },
+  "type": "array"
+}

addedOutput schema / properties / results

Added value: +{
+  "items": {
+    "type": "object"
+  },
+  "type": "array"
+}

addedOutput schema / properties / unknown

Added value: +{
+  "items": {
+    "type": "object"
+  },
+  "type": "array"
+}

AddedSep 16, 2026

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