Reported issues for MCP Superset

Pod holds 6 of 6 problems reported by people outside the maintainer team. Issues filed by the project's own owners, members and collaborators are excluded entirely — a maintainer's release checklist is not a warning to a prospective user.

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Most discussed

Bug: filter_add returns 500 Fatal error on Superset 6.0.1 when dashboard has position_json set

Description

superset_dashboard_filter_add (and other filter write tools) always return a 500 Fatal error when the target dashboard has position_json set — regardless of what the filter configuration contains.

Steps to Reproduce

1. Create a dashboard with position_json (either during create or via dashboard_update)
2. Call superset_dashboard_filter_add on that dashboard
3. Tool fails with 500

Error

Error calling tool 'superset_dashboard_filter_add': Superset API PUT /a

[Read the thread](https://github.com/bintocher/mcp-superset/issues/13) · 2026-07-02 · closed · external user · 3 comments

### Bug: chart_update dashboards parameter fails with pydantic validation error

## Description

Calling `superset_chart_update` with a `dashboards` list always fails with a pydantic input validation error. The tool never executes.

## Steps to Reproduce

superset_chart_update(chart_id=65, dashboards=[31])

## Error

Input validation error: Invalid arguments for tool superset_chart_update: [ { "code": "list_type", "expected": "list[int]", "received": "string", "input": "[31]" } ]

The MCP framework serializes the integer array `[31]` as th

[Read the thread](https://github.com/bintocher/mcp-superset/issues/12) · 2026-07-02 · closed · external user · 1 comment

### Bug: filter_add/filter_list/filter_update/filter_delete crash with TypeError when dashboard json_metadata is null

## Description

When calling any native filter tool on a dashboard where `json_metadata` is `null` in the Superset API response, the tool crashes with:

TypeError: the JSON object must be str, bytes or bytearray, not NoneType

## Steps to Reproduce

1. Create a dashboard (Superset may return `json_metadata: null` for it via GET)
2. Call any of the following tools on that dashboard:
   - `superset_dashboard_filter_add`
   - `superset_dashboard_filter_list`
   - `superset_dashboard_filter_

[Read the thread](https://github.com/bintocher/mcp-superset/issues/11) · 2026-07-02 · closed · external user · 1 comment

### Bug: filter_add/filter_list/filter_update/filter_delete crash with TypeError when dashboard json_metadata is null

## Description

All native filter tools crash with `TypeError: the JSON object must be str, bytes or bytearray, not NoneType` when a dashboard's `json_metadata` field is `null` in the Superset API response.

## Root Cause

All affected functions use:
```python
metadata = json.loads(result.get("json_metadata", "{}"))

dict.get(key, default) only returns the default when the key is missing. If the key exists but its value is None (which Superset returns for dashboards created without m

Read the thread · 2026-07-02 · closed · external user · 0 comments

BUG: position_json merge bloqueado — validação roda antes do merge

Descrição

superset_dashboard_update com position_json parcial é rejeitado porque _validate_position_json_structure roda no input ANTES do merge com o current_pos.

Evidência

PUT com {"CHART-938": {"meta": {"width": 8}}}
→ REJECTED: node 'CHART-938' missing 'type' field

Causa

Ordem em superset_dashboard_update(): validar pos → GET current → merge. Deveria ser: GET current → merge → validar merged.

Arquivo

src/mcp_superset/tools/dashboards.py — função `superset_da

Read the thread · 2026-06-26 · closed · external user · 1 comment

--version flag reports 0.2.4 instead of actual 0.2.6

Bug

--version CLI flag reports hard-coded 0.2.4 even though the installed package is 0.2.6.

Reproduction

$ uvx --from "mcp-superset==0.2.6" python -c "import mcp_superset; print(mcp_superset.version)" 0.2.6 $ uvx --from "mcp-superset==0.2.6" mcp-superset --version mcp-superset 0.2.4

Cause

src/mcp_superset/__main__.py:62 hard-codes the version string in the argparse version= argument:

parser.add_argument(
    "--version",
    action="version",
    version="%(pro

[Read the thread](https://github.com/bintocher/mcp-superset/issues/6) · 2026-06-12 · closed · external user · 0 comments

## Most recent

The remaining reports are on [the project's issue tracker](https://github.com/bintocher/mcp-superset/issues).