io.usefulapi/census
REMOTE · CENSUS.USEFULAPI.IO · SCANNED SEP 20
List reverse-ETL sources, destinations, models, syncs and runs; trigger syncs into SaaS tools.
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 Security78
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation is enforced on tool calls, advertised via RFC 9728 protected-resource metadata. Discovery is public, which costs nothing: no tool can be invoked without a token. View diagnostics → Pass
- HTTPS enforcement could not be verified: the plaintext port answered with HTTP 401, which proves neither a plaintext path nor enforcement. View diagnostics → Unverified
- 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
- The authorisation server offers only Dynamic Client Registration (RFC 7591), which MCP 2026-07-28 deprecated in favour of Client ID Metadata Documents. View diagnostics → Partial
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability86
- AI-judged instruction clarity (excellent).Pass
- Tool/resource definitions use about 780 tokens (~60/item across 13 items; 13 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management23
- Stability observed for 7 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 13 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 13 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 io.usefulapi/census MCP server?
io.usefulapi/census is a hosted endpoint at https://census.usefulapi.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 · census.usefulapi.io
claude mcp add --transport http io-usefulapi-census 'https://census.usefulapi.io/mcp'
{
"mcpServers": {
"io-usefulapi-census": {
"url": "https://census.usefulapi.io/mcp"
}
}
} {
"servers": {
"io-usefulapi-census": {
"type": "http",
"url": "https://census.usefulapi.io/mcp"
}
}
} [mcp_servers.io-usefulapi-census] url = "https://census.usefulapi.io/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"io-usefulapi-census": {
"type": "remote",
"url": "https://census.usefulapi.io/mcp",
"enabled": true
}
}
} openclaw mcp add io-usefulapi-census --url 'https://census.usefulapi.io/mcp' --transport streamable-http
mcp_servers:
io-usefulapi-census:
url: "https://census.usefulapi.io/mcp" {
"McpServers": {
"io-usefulapi-census": {
"Transport": "http",
"Url": "https://census.usefulapi.io/mcp"
}
}
} assistant mcp add io-usefulapi-census -t streamable-http -u 'https://census.usefulapi.io/mcp'
{
"mcpServers": {
"io-usefulapi-census": {
"type": "http",
"url": "https://census.usefulapi.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.
- 19 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 17 to 20. That category is still filling its 30-day observation window: 5 days of observed history at the previous scan, 6 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 10 to 13. That category is still filling its 30-day observation window: 3 days of observed history at the previous scan, 4 at this one. The score rises as the window fills, whether or not the server changes.
- 15 Sept 26 +56
- Transport: unverified → pass ▲ security
- Authorization: unverified → pass ▲ security
- Injection markers: unverified → pass ▲ security
- MCP protocol: unverified → fail ▼ functional
- Endpoint reachability: not serving MCP → reachable ▲ functional
- Tool coverage: unverified → 100 ▲ functional
- Stability: unverified → 0.07 ▲ functional
- 14 Sept 26 −52
- Endpoint reachability: reachable → not serving MCP ▼ security
- Tool safety: pass → unverified ▼ security
- Transport: pass → unverified ▼ security
- Authorization: fail → unverified ▼ security
- Capabilities: fail → unverified ▼ functional
- Tool coverage: 100 → unverified ▼ functional
- 13 Sept 26 +52
- Authorization: unverified → fail ▼ security
- Transport: unverified → pass ▲ security
- Injection markers: unverified → pass ▲ security
- First check of Judged manipulation: pass security
- MCP protocol: unverified → fail ▼ functional
- Endpoint reachability: not serving MCP → reachable ▲ functional
- Tool coverage: unverified → 100 ▲ functional
- First check of Destructive annotations: pass functional
- 12 Sept 26 0
- Transport: fail → unverified ▼ security
- 26 Aug 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 11 Aug 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
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 20 Sept 2026 · Probed https://census.usefulapi.io/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=usefulapi.io | CN=WE1,O=Google Trust Services,C=US | 16 Sept 2026 | 15 Dec 2026 | ECDSA 256 | ECDSA-SHA256 | 35a220a6de75b63113f400d7214b7790 |
| SANs: usefulapi.io, census.usefulapi.io, *.census.usefulapi.io | ||||||
| CN=WE1,O=Google Trust Services,C=US (CA) | CN=GTS Root R4,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | ECDSA 256 | ECDSA-SHA384 | 7ff31977972c224a76155d13b6d685e3 |
| CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 15 Nov 2023 | 28 Jan 2028 | ECDSA 384 | SHA256-RSA | 7fe530bf331343bedd821610493d8a1b |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of census.usefulapi.io. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| io. | present | 57355 | 8 | Verified |
| usefulapi.io. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication Enforced and verified
The endpoint asked for a token and published valid RFC 9728 metadata describing how to get one.
| Result | Enforced and verified |
|---|---|
| Enforced | On tool calls |
| HTTP status | 200 |
WWW-Authenticate challenge Bearer realm="OAuth", resource_metadata="https://census.usefulapi.io/.well-known/oauth-protected-resource/mcp", error="invalid_token", error_description="Missing or invalid access token"
Bearer realm="OAuth", resource_metadata="https://census.usefulapi.io/.well-known/oauth-protected-resource/mcp", error="invalid_token", error_description="Missing or invalid access token"Protected resource metadata
| Document | https://census.usefulapi.io/.well-known/oauth-protected-resource/mcp |
|---|---|
| Retrieved | Yes |
| Resource | https://census.usefulapi.io/mcp |
| Authorisation server | https://census.usefulapi.io |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://census.usefulapi.io/mcp | Verified | 200 | |
| http (plaintext) | http://census.usefulapi.io/mcp | Inconclusive | 401 |
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 →
census_get_destination Get destination ~45
Get a single destination connection by id. Census: GET /destinations/{id}.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | The resource id (a numeric id, passed as a string). |
No output schema declared.
No examples provided.
census_get_model Get model ~48
Get a single model by id, including its SQL/query. Census: GET /models/{id}.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | The resource id (a numeric id, passed as a string). |
No output schema declared.
No examples provided.
census_get_source Get source ~44
Get a single source connection by id. Census: GET /sources/{id}.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | The resource id (a numeric id, passed as a string). |
No output schema declared.
No examples provided.
census_get_sync Get sync ~47
Get a single sync's full configuration by id. Census: GET /syncs/{id}.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | The resource id (a numeric id, passed as a string). |
No output schema declared.
No examples provided.
census_get_sync_run Get sync run ~52
Get a single sync run by id — status, counts, errors. Census: GET /sync_runs/{id}.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | The resource id (a numeric id, passed as a string). |
No output schema declared.
No examples provided.
census_list_destinations List destinations ~70
List configured destination connections (SaaS apps data is synced INTO, e.g. Salesforce, HubSpot, Marketo). Census: GET /destinations.
| Name | Type | Req | Description |
|---|---|---|---|
| page | integer | – | Page number (1-based) for pagination. |
| per_page | integer | – | Number of records per page. |
No output schema declared.
No examples provided.
census_list_models List models ~61
List SQL models / datasets defined in the workspace (the queries that produce rows to sync). Census: GET /models.
| Name | Type | Req | Description |
|---|---|---|---|
| page | integer | – | Page number (1-based) for pagination. |
| per_page | integer | – | Number of records per page. |
No output schema declared.
No examples provided.
census_list_segments List segments ~51
List audience segments defined in the workspace. Census: GET /segments.
| Name | Type | Req | Description |
|---|---|---|---|
| page | integer | – | Page number (1-based) for pagination. |
| per_page | integer | – | Number of records per page. |
No output schema declared.
No examples provided.
census_list_sources List sources ~64
List configured data warehouse sources (Snowflake, BigQuery, Redshift, Databricks, etc.). Census: GET /sources.
| Name | Type | Req | Description |
|---|---|---|---|
| page | integer | – | Page number (1-based) for pagination. |
| per_page | integer | – | Number of records per page. |
No output schema declared.
No examples provided.
census_list_sync_runs List sync runs ~80
List sync run history (each run's status, records processed, timing). Filter by sync_id. Census: GET /sync_runs.
| Name | Type | Req | Description |
|---|---|---|---|
| page | integer | – | Page number (1-based) for pagination. |
| per_page | integer | – | Number of records per page. |
| sync_id | integer | – | Filter runs to a single sync id. |
No output schema declared.
No examples provided.
census_list_syncs List syncs ~78
List syncs (a sync maps a source model to a destination object and keeps them in sync). Returns id, label, status, source_attributes, destination_attributes. Census: GET /syncs.
| Name | Type | Req | Description |
|---|---|---|---|
| page | integer | – | Page number (1-based) for pagination. |
| per_page | integer | – | Number of records per page. |
No output schema declared.
No examples provided.
census_list_workspaces List workspaces ~33
List workspaces in the organization (note: usually requires an organization-level token). Census: GET /workspaces.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
census_trigger_sync Trigger sync ~107
TRIGGERS a sync run for the given sync id — this KICKS OFF a live data sync that writes records into the connected destination SaaS tool. Set force_full_sync=true to re-sync all rows instead of just changes. Census: POST /syncs/{id}/trigger.
| Name | Type | Req | Description |
|---|---|---|---|
| force_full_sync | boolean | – | Re-sync ALL rows instead of just changes since the last run. |
| id | string | yes | The resource id (a numeric id, passed as a string). |
No output schema declared.
No examples provided.
What is the io.usefulapi/census MCP server?
io.usefulapi/census is an MCP server listed in the public MCP registry as io.usefulapi/census. List reverse-ETL sources, destinations, models, syncs and runs; trigger syncs into SaaS tools. This page covers its hosted endpoint (https://census.usefulapi.io/mcp).
Is the io.usefulapi/census MCP server safe to use?
io.usefulapi/census scores 76 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 io.usefulapi/census MCP server expose?
io.usefulapi/census exposes 13 tools: census_list_sources, census_get_source, census_list_destinations, census_get_destination, census_list_models, and 8 more. Their descriptions and schemas cost roughly 780 tokens of context every time the server is loaded.
Does the io.usefulapi/census MCP server require authentication?
Yes. io.usefulapi/census asked us for credentials when we connected, so you will need to authorise it in your MCP client before it can do anything.
Is the io.usefulapi/census MCP server still maintained?
io.usefulapi/census is still listed as active in the MCP registry. We last reached this channel on 20 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.