Leaderboard/Fact Checker API
MCP ServerScored via MCP protocol probing: initialize handshake, tools/list conformance, and ping + tool invocation performance.

Fact Checker API

Verify claims with web evidence. Returns sources and verdict. x402 micropayment.

55/100
Operational Score
Score Breakdown
Availability30/30
Conformance10/30
Performance15/40
Key Metrics
Uptime 30d
100.0%
P95 Latency
39.2ms
Conformance
Fail
Trend
Stable
What's Being Tested
Availability
HTTP health check to the service endpoint
Responded with HTTP 404 in 44ms
Conformance
MCP initialize handshake + tools/list
MCP initialize handshake failed
Performance
MCP ping + zero-arg tool invocation benchmarking
P95 latency: 39ms, task completion: 0%
Improvement Tips
  • -Fix MCP initialize handshake errors
Recent Probe Results
TimestampStatusLatencyConformance
Apr 12, 2026success44.6msPartial
Apr 12, 2026success71.7msPartial
Apr 12, 2026success39.2msPartial
Source Registries
mcp-registry
First Seen
Apr 12, 2026
Last Seen
Apr 12, 2026
Last Probed
Apr 12, 2026
Fact Checker API — Chiark Agent Quality Index