Heartbeat

The Heartbeat Index

One number for the health of the free public API ecosystem. Every 10 minutes we call 25 popular keyless APIs. The index is the share that answered correctly, scaled down when the median API is slower than its own normal. 100 means everything is up and at usual speed.

Early data: 13 runs recorded so far. The 7-day chart fills in as checks accumulate.
Index now
79.6
24 of 25 APIs up
24h average
97.5
mean of all runs
Median latency
370 ms
across APIs that answered
Slowness
1.68×
median vs. each API's own normal

Index over time

Availability × speed factor, 0–100

10067330

Median response time (ms)

Across all APIs that answered each run

370308247185

Slowness vs. normal

1.0× means the median API is at its own 7-day median. Higher is slower.

2111

Data: /v1/index.json (CORS enabled, one row per run). Measured from one server in Sweden.