Crypto Data API

Simple pricing for onchain DEX data

Token prices, pools, candles and trades over REST and WebSocket. Start free, upgrade when you grow. Data API calls never use your RPC Requests, Request Packs or wallet balance.

Crypto Data API pricing: On-chain DEX API and Wallet API share these plans, quota and API key.

3 chains: Ethereum, Base, Arbitrum
100,000 free calls: every 30 days
REST + WebSocket: one key for both

Free

For building and testing

$0 / 30 days

100,000

100,000 calls every 30 days
Rate limit: 1 / 1 Req/s
WebSocket: 1 × 5 subscriptions
Channels: prices
Chains: Ethereum, Base, Arbitrum
Every route, including batch prices

You get Free when you create your first On-chain DEX API endpoint.

Free's 100,000 calls apply to periods that start on or after 2026-11-08 00:00 UTC. A period already under way keeps its earlier quota until it ends.

Create an endpoint

Starter

For a first app in production

$19 / 30 days

1,000,000

1,000,000 calls every 30 days
Rate limit: 25 / 50 Req/s
WebSocket: 2 × 25 subscriptions
Channels: prices, trades, pools, candles
Every chain and route in Free

Pro

For growing products

$79 / 30 days

10,000,000

10,000,000 calls every 30 days
Rate limit: 50 / 100 Req/s
WebSocket: 5 × 100 subscriptions
Channels: prices, trades, pools, candles
Every chain and route in Free

Business

For high-volume workloads

$249 / 30 days

Unlimited

Unlimited calls, rate limit only
Rate limit: 100 / 200 Req/s
WebSocket: 20 × 100 subscriptions
Channels: prices, trades, pools, candles
Every chain and route in Free

Need more than Business? Contact sales

Compare plans

Feature	Free	Starter	Pro	Business
Price / 30 days	$0	$19	$79	$249
Calls / 30 days	100,000	1,000,000	10,000,000	Unlimited
Sustained / burst rate	1 / 1 Req/s	25 / 50 Req/s	50 / 100 Req/s	100 / 200 Req/s
WebSocket connections	1	2	5	20
Subscriptions per connection	5	25	100	100
WebSocket channels	prices	prices, trades, pools, candles	prices, trades, pools, candles	prices, trades, pools, candles
Fastest price push	every 5s	every 1s	every 1s	every 1s
Chains	Ethereum, Base, Arbitrum	Ethereum, Base, Arbitrum	Ethereum, Base, Arbitrum	Ethereum, Base, Arbitrum
REST routes, incl. batch prices
Overage billing

Try it: live token prices

Public examples you can paste as they are. Use the key of your On-chain DEX API endpoint; the same key works for REST and WebSocket.

REST · current price

One HTTPS call returns the current USD price of WETH on Ethereum.

Request

curl -s "https://api.blockreq.com/v1/dex/ethereum/tokens/0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2/price" \
  -H "X-API-Key: $BLOCKREQ_DATA_API_KEY"

Response

{
  "data": {
    "chain": "ethereum",
    "address": "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2",
    "at": 1794038400,
    "price_usd": "3412.18",
    "price_time": 1794038398,
    "source": "current",
    "low_liquidity": false,
    "stale": false
  }
}

WebSocket · price streamComing soon

Subscribe to the prices channel and receive a push whenever the price moves.

Connect

wscat -c "wss://api.blockreq.com/v1/dex/ws" \
  -H "X-API-Key: $BLOCKREQ_DATA_API_KEY"

Send

{"op":"subscribe","id":"1","channel":"prices","params":{"chain":"ethereum","addresses":["0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2"],"interval":5}}

Receive

{
  "op": "prices",
  "subscription": "s1",
  "chain": "ethereum",
  "seq": 1,
  "data": [
    {
      "chain": "ethereum",
      "address": "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2",
      "price_usd": "3412.55",
      "stale": false
    }
  ]
}

Sample responses; the prices shown are illustrative.

Try it live on the product page, no key needed

How calls are counted

Request	Counted calls
GET /v1/dex/...	1
POST /v1/dex/prices	1 per 10 tokens, rounded up (50 tokens = 5)

Free's 100,000 calls apply to periods that start on or after 2026-11-08 00:00 UTC. A period already under way keeps its earlier quota until it ends.
Every response carries X-BlockReq-Data-Api-Units with the calls it counted.
A 30-day period starts with the period's first call. The first call after it ends starts a new period from zero.
Over the rate or the quota, the API answers 429 with Retry-After. When the quota is used up, X-BlockReq-Data-Api-Quota-Reset gives the time it resets.
No overage billing: a used-up quota answers 429 until the period resets.
An account paused for running out of RPC Requests can still use the data API.

Frequently asked questions

How do I get the Free plan?

Create an On-chain DEX API endpoint in the Dashboard. Free starts with your first endpoint; no card is needed.

What happens when I use up my quota?

Calls answer 429 with Retry-After until the 30-day period resets. There is no overage billing, so you are never charged more than your plan.

What does unlimited mean on Business?

Business has no period quota; it is bounded only by its rate limit.

Do Data API calls use my RPC Requests?

No. The On-chain DEX API is priced and counted separately: it never uses RPC Requests, Request Packs or wallet balance.

Does a WebSocket push count as a call?

Yes. A prices push counts 1 call per 10 tokens it carries, rounded up; other pushes count 1.

Start building with free onchain data

100,000 calls every 30 days, no card required.

Create an endpoint Read the docs

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