Atlas entry
21btc.cc
14 capabilities over MCP. The inventory is incomplete. First atlas observation.
14 tools. 14 only read.◇
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 14 tools, and 14 have AI readings.
14 tools are read as read-only, including get_changelog, get_network_stats and get_etf_flows.
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 14 of 14 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.
A zero is a count, not a clearance.
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 | Not found | 0 skills |
| MCP | Valid | 2026-07-28 · 14 tools · resources not advertised · prompts not advertised |
| OpenAPI | Not detected | 0 operations |
| WebMCP | Not detected | 0 declarative form tools · 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
- 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 2026-07-28 · 14 tools · resources not advertised · 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 14 of 14.
| Tool and inputs | ◇ AI reading, beta · confidence | ||||||
|---|---|---|---|---|---|---|---|
| Read as none of the six 14 Not a clearance. | |||||||
| limit | Reads only0.92 | ||||||
| |||||||
| no inputs | Reads only0.90 | ||||||
| |||||||
| no inputs | Reads only0.90 | ||||||
| |||||||
| country, limit | Reads only0.90 | ||||||
| |||||||
| no inputs | Reads only0.90 | ||||||
| |||||||
| no inputs | Reads only0.80 | ||||||
| |||||||
| no inputs | Reads only0.90 | ||||||
| |||||||
| no inputs | Reads only0.88 | ||||||
| |||||||
| no inputs | Reads only0.86 | ||||||
| |||||||
| no inputs | Reads only0.88 | ||||||
| |||||||
| no inputs | Reads only0.89 | ||||||
| |||||||
| no inputs | Reads only0.87 | ||||||
| |||||||
| no inputs | Reads only0.86 | ||||||
| |||||||
| kind, language, limit, query* | Reads only0.91 | ||||||
| |||||||
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. 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.
Not observed in this Passport: A2A skills.
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
- 14 capabilities · MCP 2026-07-28 · MCP endpoint validFirst observation
Fingerprint and versions
- Fingerprint
ff7bd1e3f2e7058086a274e97324ba1be51af077c5cf6fc3b138ef8025efcfeb- 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.
Declared and observed
14 tools declare hints; the AI readings agree with all 14 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
cc.21btc/bitcoin-dataListedOfficial MCP Registry · first listed 30 Oct 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:f4697a58555a931ffbdb0d305b9903e38cdbc905718ce427c91c5e0525af0d2f- Locator SHA-256
b750b516262e0fe5e5a143ad1c2ed46f4c08af515af0eb467ab0d6df0367b903- Snapshot generated
- 5 Nov 2026, 12:20 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.