Stablecoins API

How has each major stablecoin's market cap moved over time?

Daily market cap in USD of each major stablecoin the series tracks (USDT, USDC, DAI, FDUSD), all chains together, over 7 to 365 days or since 2015.

GET/api/external/stablecoin-analysis/stablecoin-market-cap-history

Get a free API key Try it in the API reference

What it returns

The circulating market cap in USD of each stablecoin the series tracks (as of September 2026 USDT, USDC, DAI and FDUSD), all chains together, one point per day at 00:00 UTC, over the last 7, 30, 90, 180 or 365 days, or since 2015 with days=all. stablecoins lists them largest first on the newest day, and every point carries each of them: null on a day that stablecoin is not tracked yet. Windows count back from the newest point, normally the previous UTC day; a day missing from the record is left out rather than filled in.

Chains

This endpoint is not tied to a chain: it takes no chain in its request.

Request

Send your key in the x-dex-data-key header. Replace each <placeholder> with a real value.

curl -H "x-dex-data-key: $DEXDATA_API_KEY" \
  "https://api.dexdata.io/api/external/stablecoin-analysis/stablecoin-market-cap-history"

Parameters
Parameter	Description
`days` query · string · optional	Trailing window in days, or `all` for the whole history. Defaults to 90. days ≤ 180 keeps the answer under 32 KB.`73090180365all`

Response fields

A JSON response. Every field is always present; null means the value could not be established, never zero.

Response fields of How has each major stablecoin's market cap moved over time?
Field	Type	Description
`days`	string	The window answered.
`stablecoins`	string[]	The stablecoin symbols, largest market cap on the newest day first.
`points`	object[]	Oldest first, one per day.
`points[].timestamp`	integer	Unix seconds, 00:00 UTC of the day.
`points[].marketCapsUsd`	object	One entry per symbol in `stablecoins`: its market cap in USD, or `null` when not tracked that day.

Start building with DexData today

Sign in, create a key and make your first call in a minute. Free credits every month, and you only pay for calls that succeed.

Get a free API key