Atlas entry
yappy.
15 capabilities over MCP and WebMCP. The inventory is incomplete. First atlas observation.
15 capabilities, 9 of them tools. 6 only read. 1 only computes. 1 changes records. 1 has 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 9 tools, and 8 have AI readings.
create_export_job is read as creating records.
6 tools are read as read-only, including get_frequently_asked, list_product_features and get_export_job.
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 9 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 1 tool No reading was counted, so any effect above is possible for it: get_system_requirements.
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 | invalid | 1 retrieved artifact |
|---|---|---|
| A2A | invalid | 0 skills |
| MCP | Valid | 2025-06-18 · 9 tools · 5 resources · prompts not advertised |
| OpenAPI | Not detected | 0 operations |
| WebMCP | Observed | 1 declarative form tool · experimental |
Exact states and meaning
- ARDfailed
Exact state: invalid · Revision 0.9 draft · 1 retrieved artifact
InterfaceDelta retained the machine state “invalid” without assigning an additional meaning.
Not observed / not fetched
- A2Afailed
Exact state: invalid · Revision 1.0 · 0 skills
InterfaceDelta retained the machine state “invalid” without assigning an additional meaning.
Not observed / not fetched
- MCPobserved
Exact state: valid · Revision 2025-06-18 · 9 tools · 5 resources · 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
- WebMCPobserved
Exact state: observed · 1 declarative form tool · experimental
The origin root HTML, or a followed page, declared WebMCP form tools. InterfaceDelta ran no scripts and submitted no forms.
A declaration does not prove the tool works. WebMCP is an experimental browser capability.
Publisher declared
Capabilities
Showing 14 of 14.
| Tool and inputs | ◇ AI reading, beta · confidence | ||||||
|---|---|---|---|---|---|---|---|
| Read as none of the six 8 Not a clearance. | |||||||
| arch*, os_version* | Computes only, changes nothing0.80 | ||||||
| |||||||
| format, idempotency_key, resource* | Creates records0.85 | ||||||
| |||||||
| job_id* | Reads only0.88 | ||||||
| |||||||
| topic | Reads only0.86 | ||||||
| |||||||
| include_notes | Reads only0.88 | ||||||
| |||||||
| include_backends | Reads only0.90 | ||||||
| |||||||
| on_device_only | Reads only0.88 | ||||||
| |||||||
| limit | Reads only0.92 | ||||||
| |||||||
| No counted reading 1 No reading was counted, so any effect is possible. | |||||||
| permissions_only | unknown | unknown | unknown | unknown | unknown | unknown | No reading |
| |||||||
| MCP resources 5 Not read by AI. | |||||||
| no inputs | Not read | ||||||
| |||||||
| no inputs | Not read | ||||||
| |||||||
| no inputs | Not read | ||||||
| |||||||
| no inputs | Not read | ||||||
| |||||||
| no inputs | Not read | ||||||
| |||||||
Read as this effect No reading: unknown Not read as this effect◇ AI readings, beta. A zero is a count, not a clearance.
A2A skills 0+ observed
Inventory incomplete. The displayed count is a lower bound; missing items do not prove removal.
None recorded in this Passport.
MCP prompts 0+ observed
Inventory incomplete. MCP prompts could not be fully inventoried: the ARD document was not valid, so declarations made there were not read.
None recorded in this Passport.
OpenAPI operations 0+ observed
Inventory incomplete. OpenAPI operations could not be fully inventoried: the ARD document was not valid, so declarations made there were not read.
None recorded in this Passport.
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
- 15 capabilities · MCP 2025-06-18 and WebMCP · MCP endpoint validFirst observation
Fingerprint and versions
- Fingerprint
32a6e5c90d9a1c049a0c05cc599d3a09b171a7b51b0a899a326ff675496c83e5- Passport schema
- 0.5.0, passport-semantic-v4
- Consistency
- MCP_PROMPTS_ADVERTISEMENT_LIST: not applicable · MCP_RESOURCES_ADVERTISEMENT_LIST: match · 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
9 tools declare hints; the AI readings agree with all 8 that have a reading.
A disagreement is not a finding about the service: either side can be wrong. How we compare declarations and readings.
About this entry
biz.yappy/yappyListedOfficial MCP Registry · first listed 15 Sep 2026 · last listed 30 Oct 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:b86aa77aa1e764074701659012b7f98b783e52c654791d394aae6dbeffad2bee- Locator SHA-256
dd60400273a319839e072de58e2d85a7cd09125c748ef68c6a411fbdee5c826f- Snapshot generated
- 14 Nov 2026, 08:50 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.