# Stabledesk

> Stablecoin measurement for Arc testnet (chain id 5042002) — supply, real volume, TVL,
> flows and network fee economics, read straight from the chain. Free JSON API, published method.

Stabledesk is not a block explorer; it is the stablecoin-finance analytics layer for Arc testnet.
Tracked assets: USDC, EURC, USYC, USDT, QCAD, MXNB, cNGN, ZARU.

Three things worth knowing before quoting any figure from this API:

- **Three volume measures are published side by side**, never blended into one: raw (every Transfer
  event), real (one largest transfer per transaction per token, so routing hops and contract
  internals are not double-counted) and adjusted (real, minus infrastructure talking to
  infrastructure). Quoting "volume" without saying which one is quoting an ambiguous number.
- **Absent beats stale.** A figure that could not be measured is `null`, never a carried-over
  previous value. Supply reads `null`, not `0`, when the chain has never been reachable.
- **Windows re-anchor when the chain freezes.** The rolling 24h windows end at `windowEnd`, which
  equals now while live and the last indexed minute once frozen. Check `GET /v1/status` for
  `degraded` and `chain.state` before treating a timestamp as current.

Gas on Arc testnet is paid in USDC, so all fee figures are dollars taken from transaction
receipts — no price feed or oracle is involved. Fees rest on sampled blocks and every derived rate
reports its sample size.

## API

- [OpenAPI 3.1 specification](https://stabledesk.xyz/openapi.json): complete machine-readable description of every /v1 endpoint
- [Developer docs](https://stabledesk.xyz/docs): endpoints, authentication, tiers and examples
- [Get a free API key](https://stabledesk.xyz/docs): `POST /v1/keys`, then send `X-API-Key` — 60 req/min free, 600 req/min Pro
- [Status](https://stabledesk.xyz/v1/status): chain liveness and index health, no key required

## Method

- [Measurement method](https://stabledesk.xyz/methodology): every filter and every threshold, as published numbers
- [Excluded addresses](https://stabledesk.xyz/docs): the noise filter, and where it departs from the Visa/Allium standard and why

## Pages

- [Terminal](https://stabledesk.xyz/): live supply, volume, fee economics and largest transfers
- [Ecosystem](https://stabledesk.xyz/ecosystem): every protocol with measured TVL, flow and status
- [Entities](https://stabledesk.xyz/entities): derived attributes for the addresses carrying most flow
- [Status](https://stabledesk.xyz/status): chain and indexer health

## Optional

- [Source](https://github.com/moreno-g/stabledesk): read-only indexer, zero dependencies
- [Protocol registry contributions](https://stabledesk.xyz/ecosystem): identify a contract holding unattributed balances