Abacus API

Base URL

https://abacus.jasoncameron.dev

Authentication

No key for the public endpoints. Namespaces are not secret and anyone who knows the pair can read or increment your counter, so choose an unguessable namespace if that matters.

Rate limit

Observed policy of 30 requests per 10 seconds, reported in `RateLimit-Policy`, `RateLimit-Remaining` and `RateLimit-Reset` headers.

Pricing

Free and open source.

CORS

Enabled — callable directly from browser JavaScript

Official docs

Read the docs

Every request below was executed against the live API on 21 Aug 2026, and the response shown is the real body it returned — not an illustration.

curl 'https://abacus.jasoncameron.dev/get/test/test'

const res = await fetch("https://abacus.jasoncameron.dev/get/test/test");
if (!res.ok) throw new Error(`Request failed: ${res.status}`);
const data = await res.json();
console.log(data);

import requests

res = requests.get("https://abacus.jasoncameron.dev/get/test/test", timeout=20)
res.raise_for_status()
print(res.json())

{
  "value": 606
}

valueinteger

The counter's current value. `/get` returns it unchanged; `/hit` returns the value after incrementing, so the first hit returns 1, not 0.

RateLimit-Policyheader

The active policy, formatted as `30;w=10` meaning 30 requests per 10-second window.

RateLimit-Remaining / RateLimit-Resetheader

Requests left in the window and the Unix timestamp when it resets.

• Add a view counter to a static site or blog with no backend at all
• Count downloads of a release asset from a plain HTML page
• Run a lightweight poll or upvote widget in documentation
• Track how often a README badge is rendered
• Prototype a counter feature before building real storage for it

If Abacus does not fit, these developer & testing apis cover similar ground. Every one was called before publishing, and each links to its own reference page with a working curl command and the response it returned.