# StableCrypto API
> Crypto market data and wallet intelligence via x402/MPP micropayments. All endpoints POST.

## Base URL
https://stablecrypto.dev

## Auth
x402/MPP payment (USDC on Base, Solana, or Tempo). Use check_endpoint_schema on any endpoint to get its request schema before calling.

## Arkham — Wallet Intelligence
93 stateless Arkham endpoints under /api/arkham, priced from Arkham credits at $0.01 per credit. Free Arkham endpoints stay free. Per-row endpoints price from request limit (default 50 when omitted). Failed upstream requests are not charged. Routes cover analytics, ARKM supply, chains, address/entity balances, Solana subaccounts, clusters, counterparties, flows, history, address/entity/token intelligence, intelligence updates, loans, network status/history, Polymarket, portfolio time series, swaps, tags, token market/holders/price/flow/volume, transfers/histograms/tx, transfer volume, and WebSocket pricing info. Stateful Arkham account mutation routes such as alerts, private labels/entities, and WebSocket session lifecycle are intentionally not exposed.
Core: /chains, /search, /intelligence/address, /intelligence/address-all, /intelligence/address-batch, /intelligence/address-batch-all, /intelligence/address-enriched, /intelligence/address-enriched-all, /intelligence/address-enriched-batch, /intelligence/address-enriched-batch-all, /intelligence/entity, /intelligence/entity-summary, /intelligence/token, /balances/address, /balances/entity, /portfolio/address, /portfolio/entity, /counterparties/address, /counterparties/entity, /transfers, /transfers/tx, /tx
Examples: POST /api/arkham/search { "query": "Coinbase", "arkhamEntities": 3, "tokens": 2 }; POST /api/arkham/intelligence/entity-summary { "entity": "coinbase" }

## CoinGecko — Market Data
/api/coingecko/price, /markets, /coin, /chart, /ohlc, /history, /trending, /global, /categories, /top-movers, /exchange, /exchange/tickers, /exchange/volume-chart
Example: POST /api/coingecko/price { "ids": ["bitcoin"], "vs_currencies": ["usd"] }

## CoinGecko — On-Chain
/api/coingecko/onchain/networks, /search, /trending, /new-pools, /categories, /pool, /pool/info, /pool/ohlcv, /pool/trades, /network/dexes, /network/trending, /network/new-pools, /network/pools, /category/pools

## DefiLlama — DeFi Data
/api/defillama/protocols, /protocol, /tvl, /chains, /chain-tvl, /coins/prices, /coins/prices-historical, /coins/block, /stablecoins, /stablecoin, /stablecoin-charts, /stablecoin-chains, /dex-overview, /dex-summary, /options-overview, /fees-overview, /fees-summary

## Alchemy — Blockchain Data
/api/alchemy/token/token-balances, /token-metadata, /token-allowance, /transfers/asset-transfers, /prices/by-symbol, /prices/by-address, /prices/historical, /portfolio/tokens, /portfolio/token-balances, /portfolio/nfts, /portfolio/nft-collections, /simulation/simulate-asset-changes, /simulation/simulate-execution, /utility/transaction-receipts, /node/rpc

## Etherscan — Ethereum Explorer
/api/etherscan/account/balance, /balance-multi, /txlist, /txlist-internal, /tokentx, /tokennfttx, /token1155tx, /contract/getabi, /getsourcecode, /getcontractcreation, /transaction/getstatus, /gettxreceiptstatus, /block/getblockreward, /logs/getLogs, /token/tokensupply, /tokeninfo, /gas/gasestimate, /gasoracle, /stats/ethprice, /ethsupply, /nodecount, /chainsize, /dailytx