MCP server health, State of MCP census
Calculator
com.mcpcalc/calculator
Calculators accessible via MCP with real-time collaborative sessions and shareable URLs.
- server_json_invalid
Checks
The exact rows akashi check com.mcpcalc/calculator prints, from the 2026-08-03 census.
| Check | Status | Detail |
|---|---|---|
| registry status | pass | active |
| server.json valid | fail | jsonschema validation failed with 'https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json#' |
| repo reachable | skip | no repository declared |
| remote reachable | pass | HTTP 200 via initialize |
| MCP conformance | pass | initialize handshake ok |
| tools/list | pass | 10 tools: list_calculators, get_calculator_schema, calculate, generate_prefilled_url, calculate_cas, calculate_cas_headless, create_session, get_session_state, ... |
| at least one live entrypoint | pass | 1 alive |
| spec 2026-07-28 | warn | needs-migration: no server/discover, still mints Mcp-Session-Id, routing headers not enforced |
Spec 2026-07-28 readiness
Verdict: needs-migration(no server/discover; still mints Mcp-Session-Id; routing headers not enforced). Measured against the 2026-07-28 specification (ruleset 2026-07-28-rc, compiled from the draft and re-diffed against the final text with no verdict-bearing rule changed) with read-only, keyless calls; see the ecosystem readiness report for how this server compares.
| Accepts handshake-free calls | yes |
| server/discover implemented | no |
| Session independence | session minted |
| Routing headers enforced | ignored |
Advisory: no resultType on results; no cache metadata on list results; negotiates 2025-03-26.
Evidence
Repository
No repository declared.
Packages
No packages declared.
Remote endpoints
- https://mcpcalc.com/api/v1/mcp
streamable-http · reachable· HTTP 200· initialize_ok
10 tools: list_calculators, get_calculator_schema, calculate, generate_prefilled_url, calculate_cas, calculate_cas_headless, create_session, get_session_state, ...
server.json
invalidagainst its declared schema
- jsonschema validation failed with 'https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json#'
- - at '/repository': missing properties 'url', 'source'
One of 19804 servers in the 2026-08-03 State of MCP census: 15974 healthy (80.7%), 2792 degraded (14.1%), 851 dead (4.3%), 187 unknown (0.9%).
Verify it yourself
This page is a static read of one dated probe. Run the same check locally, any time, with no key:
$ akashi check com.mcpcalc/calculatorInstall Akashi - single Go binary, zero keys, MIT licensed.
Is this your server?
Claiming a server (an auto-refreshing badge and a verified publisher profile) is coming soon. Until then, embed the verified-on-date badge yourself with akashi check com.mcpcalc/calculator --badge.
Open data, CC BY 4.0. How this census works - denominator, tiers, and what each check does.