Build with CryptoLens

One API for UK crypto wallet data, live prices, gas across 14 chains, and HMRC-aware tax calculations. Free tier with rate limits — Pro and Business unlock higher quotas plus multiple keys.

API Reference

Endpoints, parameters, response shapes, rate limits.

Get an API Key

Manage your keys, see usage, regenerate.

Embed Widgets

Drop free CryptoLens widgets into your site.

Quickstart

Every endpoint accepts a Bearer token. Get yours at /api-keys. Free tier ships with 60 requests/minute.

curl

curl -H "Authorization: Bearer YOUR_API_KEY" \
  https://cryptolens.uk/api/v1/wallet/0xYOUR_WALLET_ADDRESS_HERE

JavaScript

const r = await fetch(
  "https://cryptolens.uk/api/v1/wallet/" + ADDRESS,
  { headers: { Authorization: "Bearer " + API_KEY } }
);
const wallet = await r.json();

Python

import requests

r = requests.get(
    f"https://cryptolens.uk/api/v1/wallet/{address}",
    headers={"Authorization": f"Bearer {api_key}"},
)
wallet = r.json()

What you can build

GET/api/v1/wallet/:addressMultichain holdings + native + token balances + GBP value.

GET/api/v1/wallet/:address/pnlRealised + unrealised P&L, HODL benchmark, cost basis.

GET/api/v1/tax/:addressHMRC Section 104 pool report, gains/losses, AEA applied.

GET/api/v1/prices?ids=btc,eth,solLive GBP/USD/EUR prices for any token by symbol or CoinGecko id.

GET/api/v1/gas?chain=ethGwei + GBP transfer cost (slow/avg/fast) for 13 EVM chains + Solana.

GET/api/v1/trendingTop movers + sentiment + fumble index on the homepage.

Full API reference

Plans & rate limits

Free

£0

60 req/min · 1 key

Get a key

Developer

£19.99/mo

600 req/min · 5 keys

Upgrade

Business

£49.99/mo

3,000 req/min · 25 keys · webhooks

Upgrade

Need an SLA, custom rate limit, or webhook setup?

hello@cryptolens.uk