Atlas entry

`x402check.dev`

6 capabilities over MCP. The inventory is incomplete. First atlas observation.

Observed 3 Nov 2026, 22:02 UTC · passive: no tools called, no credentials sent · sha256:0ec871…88e7

Capability facts

As observed from outside, at the time below

Observed: 3 Nov 2026, 22:02 UTC
Signed: 4 Nov 2026, 00:59 UTC

Protocols: MCP
Tools: 6
Declared sign-in: None declared

Effects counted AI readings, beta

Moves money: 0
Deletes or cancels records: 0
Sends messages to people: 0
Changes permissions: 0
Runs code: 0
Asks a person: 0

6 tools examined; 0 counted above a measured threshold.

Declared vs read disagreements

Declared read-only, read as writing: 0
Declared destructive, read as not writing: 0
Declared non-destructive, read as deleting: 0
Declared closed-world, read as reaching out: 0

Change since previous: First observation
Label status: Current

Surfaces

5 protocols checked

ARD	invalid	1 retrieved artifact
A2A	invalid	0 skills
MCP	Valid	2024-11-05 · 6 tools · resources not advertised · prompts not advertised
OpenAPI	Not detected	0 operations
WebMCP	Not detected	0 declarative form tools · experimental

Exact states and meaning

ARD
failed
Exact state: invalid · 1 retrieved artifact
InterfaceDelta retained the machine state “invalid” without assigning an additional meaning.
Not observed / not fetched
A2A
failed
Exact state: invalid · 0 skills
InterfaceDelta retained the machine state “invalid” without assigning an additional meaning.
Not observed / not fetched
MCP
observed
Exact state: valid · Revision 2024-11-05 · 6 tools · resources not advertised · prompts not advertised
A usable protocol document was retrieved and validated.
Directly observed
OpenAPI
absent
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
WebMCP
absent
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

6 · inventory incomplete

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.

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 tools 6

compare_tools
inputs fresh, urls (required)
deep_check
inputs url (required)
preflight_batch
inputs fresh, urls (required)
preflight_check
inputs fresh, url (required)
verify_payto
inputs fresh, url (required)
watch_tool
inputs email, url (required), webhookUrl

MCP resources 0+ observed

Inventory incomplete. MCP resources could not be fully inventoried: the ARD document was not valid, so declarations made there were not read.

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.

Declared and observed

6 tools declare hints; the AI readings agree with all 0 that have a reading.

A disagreement is not a finding about the service: either side can be wrong. How we compare declarations and readings.

Atlas history

1 observation

3 Nov 2026, 22:02 UTC6 capabilities · MCP 2024-11-05 · MCP endpoint validFirst observation
Fingerprint and versions
Fingerprint
0ec871406e39a67574e49736a4b8e572ca92223084ca36ce971bbf9fb7a188e7
Passport schema
0.5.0, passport-semantic-v4
Consistency
MCP_PROMPTS_ADVERTISEMENT_LIST: not applicable · MCP_RESOURCES_ADVERTISEMENT_LIST: not applicable · 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.

About this entry

dev.x402check/mcp
Listed
Official 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: sha256:43c8972c5994db836e4b6580d3662c49a28256ae478df3cf723a68dc0a483d09
Locator SHA-256: 1db9e407db0b40523b8cc0b96283015333585a45c17bd077b83d3bd109d97548
Snapshot generated: 4 Nov 2026, 00:59 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.