Atlas entry
paywallcompass.
10 capabilities over MCP. The inventory is incomplete. First atlas observation.
10 tools. 7 only read. 1 only computes. 2 have no reading.◇
AI reading, beta. side-effects v1 on claude-haiku-5.5, calibrated on MCP (golden-3). Only readings above a measured precision count. Counts are tools, not calls: no tool was called.
AI readings summary · beta
The service lists 10 tools, and 8 have AI readings.
7 tools are read as read-only, including dataset_provenance, dataset_compare and dataset_top.
dataset_provenance: Returns attribution details for the PaywallCompass dataset: its origin, computation date, licence and citation.
dataset_compare: Returns dataset rows whose given column matches any of two to ten listed values, in the order provided, for side-by-side comparisons.
Written by code from the AI readings on this page: it groups them and says nothing they do not.
What an agent can do here
AI readings, beta · Readings on 8 of 10 MCP tools.
Moves money
0
No tool read this way.
Deletes or cancels records
0
No tool read this way.
Sends messages to people
0
No tool read this way.
Changes permissions
0
No tool read this way.
Runs code
0
No tool read this way.
Should ask a person first
0
No tool read this way.
No counted reading 2 tools No reading was counted, so any effect above is possible for them: dataset_stats, submit_enquiry.
What changed
First atlas observation. Atlas history
Look first
AI reading, beta: AI adds items here; it never removes one.
No tool is read as one of the six effects. A zero is a count, not a clearance.
Surfaces
5 protocols checked
| ARD | Not found | No document retrieved |
|---|---|---|
| A2A | Not found | 0 skills |
| MCP | Valid | 2025-11-25 · 10 tools · 0 resources retained · listing incomplete · prompts not advertised |
| OpenAPI | Not detected | 0 operations |
| WebMCP | Not detected | 0 declarative form tools · experimental |
Exact states and meaning
- ARDabsent
Exact state: not found · No document retrieved
The supported discovery location returned no matching document.
Not found does not prove the service exposes no such interface elsewhere.
Not observed / not fetched
- A2Aabsent
Exact state: not found · 0 skills
The supported discovery location returned no matching document.
Not found does not prove the service exposes no such interface elsewhere.
Not observed / not fetched
- MCPobserved
Exact state: valid · Revision 2025-11-25 · 10 tools · 0 resources retained · listing incomplete · prompts not advertised
A usable protocol document was retrieved and validated.
Directly observed
- OpenAPIabsent
Exact state: not detected · 0 operations
No endpoint was established from the evidence and scope that InterfaceDelta inspected.
Not detected does not prove that no endpoint exists.
Not observed / not fetched
- WebMCPabsent
Exact state: not detected · 0 declarative form tools · experimental
No named declarative WebMCP form tools were observed in the origin root HTML.
Script-registered tools and other pages are not observed, so this does not mean the site has no WebMCP tools.
Not observed / not fetched
Capabilities
Showing 10 of 10.
| Tool and inputs | ◇ AI reading, beta · confidence | ||||||
|---|---|---|---|---|---|---|---|
| Read as none of the six 8 Not a clearance. | |||||||
| no inputs | Reads only0.83 | ||||||
| |||||||
| Returns dataset rows whose given column matches any of two to ten listed values, in the order provided, for side-by-side comparisons.column*, values* | Reads only0.86 | ||||||
| |||||||
| Returns attribution details for the PaywallCompass dataset: its origin, computation date, licence and citation.no inputs | Reads only0.80 | ||||||
| |||||||
| Returns dataset rows from PaywallCompass whose named column matches a given value, ignoring letter case.column*, value* | Reads only0.88 | ||||||
| |||||||
| Returns up to 50 rows from the PaywallCompass dataset whose cells match a case-insensitive text query.limit, query* | Reads only0.92 | ||||||
| |||||||
| ascending, column*, limit | Reads only0.92 | ||||||
| |||||||
| Returns details of an enquiry: it is free, buys nothing, promises no quote, and lists recipients, consent text and confirmation.no inputs | Computes only, changes nothing0.87 | ||||||
| |||||||
| Lists the form fields of an enquiry, with each field's key, label, type, required flag, help text and options.no inputs | Reads only0.86 | ||||||
| |||||||
| No counted reading 2 No reading was counted, so any effect is possible. | |||||||
| Summarizes count, minimum, maximum, mean, median and total for one numeric column in the PaywallCompass dataset.column* | unknown | unknown | unknown | unknown | unknown | unknown | No reading |
| |||||||
| Creates a PaywallCompass enquiry after you confirm a summary and consent; the team sees it only after an emailed link is clicked.answers*, confirmation, consent* | unknown | unknown | unknown | unknown | unknown | unknown | No reading |
| |||||||
Read as this effect No reading: unknown Not read as this effect◇ AI readings, beta. A zero is a count, not a clearance.
MCP resources 0+ observed
Inventory incomplete. The displayed count is a lower bound; missing items do not prove removal.
None recorded in this Passport.
Not observed in this Passport: A2A skills, MCP prompts, OpenAPI operations.
The atlas shows each capability by its plain identifier, inputs and declared sign-in. Publisher descriptions, paths, links and source evidence are not published here.
The comparison with the previous observation is shown only to the account that recorded it.
Atlas history
1 observation
- 10 capabilities · MCP 2025-11-25 · MCP endpoint truncated · 1 incomplete inventory groupFirst observation
Fingerprint and versions
- Fingerprint
cafe50115891e3dc57fe2a7e519a84f20968967b540bd0a2bb761cfa84fbacac(incomplete)- Passport schema
- 0.5.0, passport-semantic-v4
- Consistency
- MCP_PROMPTS_ADVERTISEMENT_LIST: not applicable · MCP_RESOURCES_ADVERTISEMENT_LIST: indeterminate · MCP_TOOLS_ADVERTISEMENT_LIST: match · OPENAPI_MCP_EXPLICIT_MAPPING: not applicable
Each class compares an observation with the previous atlas observation. Runs of unchanged observations are grouped. Struck values are what the previous observation recorded; inserted values are what this one recorded.
Declared and observed
No tools declare hints.
A disagreement is not a finding about the service: either side can be wrong. How we compare declarations and readings.
About this entry
com.paywallcompass/siteListedOfficial MCP Registry · first listed 3 Nov 2026 · last listed 3 Nov 2026
Passive observations of a public interface listed in the Official MCP Registry. An observation does not verify security, ownership or compliance, and InterfaceDelta assigns no scores or rankings. Methodology · Report an inaccuracy · Ask for removal
Identity and snapshot
- Target key
sha256:259d1d6fdb28f1206d4960c9b7065a16b9780bbd29b096506bf9b4d8be1e0386- Locator SHA-256
a2d4672e1809edad4eb593813b9e9252887663fdc7e770435e92b815493fa633- Snapshot generated
- 13 Nov 2026, 01:06 UTC
The entry is one exact observed target, not a real-world service identity, and implies no ownership. Endpoint paths are not published; the locator hash lets an operator confirm their own URL.