StackData
REMOTE · API.STACKDATA.IO · SCANNED SEP 25
Official statistics, China censuses & yearbooks, and as-of customs tariffs with legal citations.
Available components
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. How we score → Why this is hard to score →
Endpoint Security57
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- 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. See how to fix → View diagnostics → Unverified
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability75
- AI-judged instruction clarity (good).Pass
- Tool/resource definitions use about 440 tokens (~110/item across 4 items; 4 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management90
- Stability observed for 27 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage91
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 73% of tool parameters carry a description.Partial
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 4 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 5 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities60
- Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28. See how to fix → Fail
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.
remote · api.stackdata.io
claude mcp add --transport http io-stackdata-stackdata 'https://api.stackdata.io/mcp'
{
"mcpServers": {
"io-stackdata-stackdata": {
"url": "https://api.stackdata.io/mcp"
}
}
} {
"servers": {
"io-stackdata-stackdata": {
"type": "http",
"url": "https://api.stackdata.io/mcp"
}
}
} [mcp_servers.io-stackdata-stackdata] url = "https://api.stackdata.io/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"io-stackdata-stackdata": {
"type": "remote",
"url": "https://api.stackdata.io/mcp",
"enabled": true
}
}
} openclaw mcp add io-stackdata-stackdata --url 'https://api.stackdata.io/mcp' --transport streamable-http
mcp_servers:
io-stackdata-stackdata:
url: "https://api.stackdata.io/mcp" {
"McpServers": {
"io-stackdata-stackdata": {
"Transport": "http",
"Url": "https://api.stackdata.io/mcp"
}
}
} assistant mcp add io-stackdata-stackdata -t streamable-http -u 'https://api.stackdata.io/mcp'
{
"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.
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 25 Sept 26 +1
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 23 Sept 26 +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.
- 21 Sept 26 +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.
- 19 Sept 26 +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.
- 17 Sept 26 +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.
- 15 Sept 26 +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.
- 12 Sept 26 +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.
- 10 Sept 26 +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.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 25 Sept 2026 · Probed https://api.stackdata.io/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_256_GCM_SHA384 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=api.stackdata.io | CN=YE2,O=Let's Encrypt,C=US | 15 Aug 2026 | 13 Nov 2026 | ECDSA 256 | ECDSA-SHA384 | 68bb43dd1b71862ba7eca9d707a5de9161d |
| SANs: api.stackdata.io | ||||||
| CN=YE2,O=Let's Encrypt,C=US (CA) | CN=Root YE,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | ECDSA 384 | ECDSA-SHA384 | 4df3b15dd6c0784c507cd37b58e6f115 |
| CN=Root YE,O=ISRG,C=US (CA) | CN=ISRG Root X2,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | ECDSA-SHA384 | 872165fc34b6e5fba8add5b3705fb53a |
| CN=ISRG Root X2,O=Internet Security Research Group,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | SHA256-RSA | 6c8f1dc727c7117f7baf853ac980f9cd |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of api.stackdata.io. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| io. | present | 57355 | 8 | Verified |
| stackdata.io. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
| Header | Value |
|---|---|
| content-security-policy | default-src 'none'; style-src 'unsafe-inline'; img-src data: |
| x-content-type-options | nosniff |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://api.stackdata.io/mcp | Verified | 200 | |
| http (plaintext) | http://api.stackdata.io/mcp | HTTPS enforced | 301 | https://api.stackdata.io/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
get_table ~84
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'.
| Name | Type | Req | Description |
|---|---|---|---|
| dataset_id | string | yes | catalog dataset id |
No output schema declared.
No examples provided.
resolve_data ~82
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).
| Name | Type | Req | Description |
|---|---|---|---|
| end | integer | – | end year |
| q | string | yes | the question |
| start | integer | – | start year |
No output schema declared.
No examples provided.
search_datasets ~78
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.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | – | – |
| q | string | yes | search query |
No output schema declared.
No examples provided.
tariff_lookup ~133
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.
| Name | Type | Req | Description |
|---|---|---|---|
| code | string | yes | 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) |
No output schema declared.
No examples provided.
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.