MCP server health, State of MCP census
Opencrater Mcp
io.github.open-crater/opencrater-mcp
Monetize your MCP server or CLI: live OpenCrater network stats + how maintainers earn USDC.
- server_json_invalid
Checks
The exact rows akashi check io.github.open-crater/opencrater-mcp 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/2025-07-09/server.schema.json#' |
| repo reachable | pass | exists |
| repo freshness | pass | pushed 40d ago |
| package npm | pass | published (0.1.1) |
| remote reachable | pass | HTTP 200 via initialize |
| MCP conformance | pass | initialize handshake ok |
| tools/list | pass | 3 tools: opencrater_network_stats, opencrater_supported_tools, opencrater_get_started |
| at least one live entrypoint | pass | 3 alive |
| license present | warn | none detected |
| spec 2026-07-28 | warn | needs-migration: no server/discover, routing headers not enforced |
Spec 2026-07-28 readiness
Verdict: needs-migration(no server/discover; 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 | yes |
| Routing headers enforced | ignored |
Advisory: no resultType on results; no cache metadata on list results; negotiates 2025-06-18.
Evidence
Packages
- npm opencrater-mcp · published(0.1.1)
Remote endpoints
- https://opencrater.to/mcp
streamable-http · reachable· HTTP 200· initialize_ok
3 tools: opencrater_network_stats, opencrater_supported_tools, opencrater_get_started
server.json
invalidagainst its declared schema
- jsonschema validation failed with 'https://static.modelcontextprotocol.io/schemas/2025-07-09/server.schema.json#'
- - at '': allOf failed
- - at '/packages/0': validation failed
- - at '/packages/0': missing property 'registry_type'
- - at '/packages/0': additional properties 'registryType' not allowed
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 io.github.open-crater/opencrater-mcpInstall 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 io.github.open-crater/opencrater-mcp --badge.
Open data, CC BY 4.0. How this census works - denominator, tiers, and what each check does.