# StackData (remote · api.stackdata.io)

Official statistics, China censuses & yearbooks, and as-of customs tariffs with legal citations.

- Trust score: 75/100 (medium)
- Change this week: +4
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-25

## Components

- remote · `api.stackdata.io`: 75/100 (this document), [markdown](https://verifymcp.io/servers/io-stackdata-stackdata/api.md), [page](https://verifymcp.io/servers/io-stackdata-stackdata/api)

## Channel facts

- Endpoint: `https://api.stackdata.io/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `0.1.0`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-09-25.

- **Endpoint Security**: 57/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation not fully verified: no authorisation is required to call this server, and 4 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe.
  - HTTPS is enforced; there's no plaintext access path.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 75/100
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 440 tokens (~110/item across 4 items; 4 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 90/100
  - Stability observed for 27 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 91/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 73% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 4 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 5 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 60/100
  - Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28.

## Install

### How do I install the StackData MCP server?

StackData is a hosted endpoint at https://api.stackdata.io/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add --transport http io-stackdata-stackdata 'https://api.stackdata.io/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "io-stackdata-stackdata": {
      "url": "https://api.stackdata.io/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "io-stackdata-stackdata": {
      "type": "http",
      "url": "https://api.stackdata.io/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.io-stackdata-stackdata]
url = "https://api.stackdata.io/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "io-stackdata-stackdata": {
      "type": "remote",
      "url": "https://api.stackdata.io/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add io-stackdata-stackdata --url 'https://api.stackdata.io/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  io-stackdata-stackdata:
    url: "https://api.stackdata.io/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "io-stackdata-stackdata": {
      "Transport": "http",
      "Url": "https://api.stackdata.io/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add io-stackdata-stackdata -t streamable-http -u 'https://api.stackdata.io/mcp'
```

### Other

```json
{
  "mcpServers": {
    "io-stackdata-stackdata": {
      "type": "http",
      "url": "https://api.stackdata.io/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-09-25 (score 75, +1)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-09-23 (score 74, +1)

No change was recorded against any check on this day. Stability & Change Management went from 80 to 83. That category is still filling its 30-day observation window: 24 days of observed history at the previous scan, 25 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-21 (score 73, +1)

No change was recorded against any check on this day. Stability & Change Management went from 73 to 77. That category is still filling its 30-day observation window: 22 days of observed history at the previous scan, 23 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-19 (score 72, +1)

No change was recorded against any check on this day. Stability & Change Management went from 67 to 70. That category is still filling its 30-day observation window: 20 days of observed history at the previous scan, 21 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-17 (score 71, +1)

No change was recorded against any check on this day. Stability & Change Management went from 60 to 63. That category is still filling its 30-day observation window: 18 days of observed history at the previous scan, 19 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-15 (score 70, +1)

No change was recorded against any check on this day. Stability & Change Management went from 53 to 57. That category is still filling its 30-day observation window: 16 days of observed history at the previous scan, 17 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-12 (score 69, +1)

No change was recorded against any check on this day. Stability & Change Management went from 43 to 47. That category is still filling its 30-day observation window: 13 days of observed history at the previous scan, 14 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-10 (score 68, +1)

No change was recorded against any check on this day. Stability & Change Management went from 37 to 40. That category is still filling its 30-day observation window: 11 days of observed history at the previous scan, 12 at this one. The score rises as the window fills, whether or not the server changes.

## MCP tools (4)

### `search_datasets` (~78 tokens)

Search StackData's catalog of 50k+ official statistical datasets (SDMX/World Bank dataflows, China censuses and yearbooks, tariff schedules). Multilingual: an English query finds Chinese-titled tables. Returns dataset ids usable with the other tools.

Input parameters:

- `limit` (integer)
- `q` (string, required): search query

### `get_table` (~84 tokens)

Fetch a STORED table whole, by dataset id (families cn-nbs-census and cn-nbs-yearbook): labelled rows × columns with original-language labels, English overlay, units, and provenance down to the source file. Ids look like 'cn-nbs-census:2010_a0101a'.

Input parameters:

- `dataset_id` (string, required): catalog dataset id

### `tariff_lookup` (~133 tokens)

As-of customs-tariff lookup: which measures/duty rates apply to a goods code in a jurisdiction (eu, us, uk, jp), optionally from an origin, on a date. Duty expressions are verbatim; every measure carries its legal citation. Not legal advice.

Input parameters:

- `code` (string, required): goods code, 2-10 digits (HS/TARIC/HTS)
- `date` (string): as-of date YYYY-MM-DD, default today
- `direction` (string)
- `jurisdiction` (string)
- `origin` (string): ISO2 origin country (eu/uk only)

### `resolve_data` (~82 tokens)

Ask a data question in English ('unemployment rate in Japan', 'compare GDP in Japan and Germany') — resolves to the best covering dataset and returns the observations, with coverage honesty (missing countries are reported, never papered over).

Input parameters:

- `end` (integer): end year
- `q` (string, required): the question
- `start` (integer): start year

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/io-stackdata-stackdata/api#diagnostics

## Score history

- 2026-09-25: 75
- 2026-09-24: 74
- 2026-09-23: 74
- 2026-09-22: 73
- 2026-09-21: 73
- 2026-09-20: 72
- 2026-09-19: 72
- 2026-09-18: 71
- 2026-09-17: 71
- 2026-09-16: 70
- 2026-09-15: 70
- 2026-09-14: 69
- 2026-09-13: 69
- 2026-09-12: 69
- 2026-09-11: 68
- 2026-09-10: 68
- 2026-09-09: 67
- 2026-09-08: 67
- 2026-09-07: 66
- 2026-09-06: 66
- 2026-09-05: 65
- 2026-09-04: 65
- 2026-09-03: 64
- 2026-09-02: 64
- 2026-09-01: 63
- 2026-08-31: 63
- 2026-08-30: 62
- 2026-08-29: 62

## Common questions

### What is the StackData MCP server?

StackData is an MCP server listed in the public MCP registry as io.stackdata/stackdata. Official statistics, China censuses & yearbooks, and as-of customs tariffs with legal citations. This page covers its hosted endpoint (https://api.stackdata.io/mcp).

### Is the StackData MCP server safe to use?

StackData scores 75 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the StackData MCP server expose?

StackData exposes 4 tools: search_datasets, get_table, tariff_lookup, resolve_data. Their descriptions and schemas cost roughly 377 tokens of context every time the server is loaded.

### Does the StackData MCP server require authentication?

No. We connected to StackData without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the StackData MCP server still maintained?

StackData is still listed as active in the MCP registry. We last reached this channel on 25 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://api.stackdata.io/mcp
- Website: https://stackdata.io/
- Changelog RSS feed: https://verifymcp.io/servers/io-stackdata-stackdata/api.xml
- Changelog JSON feed: https://verifymcp.io/servers/io-stackdata-stackdata/api.json
- HTML version of this page: https://verifymcp.io/servers/io-stackdata-stackdata/api