MCP server health, State of MCP census
VASTlint
io.github.aleksUIX/vastlint
Validate VAST, VMAP, and DAAST ad tags against IAB specs. 220 rules, pure Rust core.
Checks
The exact rows akashi check io.github.aleksUIX/vastlint prints, from the 2026-08-03 census.
| Check | Status | Detail |
|---|---|---|
| registry status | pass | active |
| server.json valid | pass | validates against its declared JSON Schema |
| repo reachable | pass | exists |
| repo freshness | pass | pushed 0d ago |
| package mcpb | skip | https://github.com/aleksUIX/vastlint/releases/download/v0.11.2/vastlint-mcp-linux-x86_64.tar.gz not keyless-probeable |
| remote reachable | pass | HTTP 200 via initialize |
| MCP conformance | pass | initialize handshake ok |
| tools/list | pass | 14 tools: validate_vast, validate_vast_url, list_rules, explain_rule, fix_vast, get_adcp_capabilities, list_content_standards, create_content_standards, ... |
| at least one live entrypoint | pass | 2 alive |
| license present | warn | none detected |
| spec 2026-07-28 | fail | at-risk: deprecated HTTP+SSE transport |
Spec 2026-07-28 readiness
Verdict: at-risk(deprecated HTTP+SSE transport). 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 2024-11-05.
Evidence
Packages
- mcpb https://github.com/aleksUIX/vastlint/releases/download/v0.11.2/vastlint-mcp-linux-x86_64.tar.gz · unprobed
Remote endpoints
- https://vastlint.org/mcp
sse · reachable· HTTP 200· initialize_ok
14 tools: validate_vast, validate_vast_url, list_rules, explain_rule, fix_vast, get_adcp_capabilities, list_content_standards, create_content_standards, ...
server.json
validagainst its declared schema
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.aleksUIX/vastlintInstall 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.aleksUIX/vastlint --badge.
Open data, CC BY 4.0. How this census works - denominator, tiers, and what each check does.