{"uid":"cap_j2w4vRcgVe_MkMgvjZcPy","slug":"orderbook-liquidity-api-by-synthora-524c03ab","name":"Orderbook Liquidity API by SYNTHORA","description":"Live order book depth and liquidity (bid/ask walls, spread, imbalance) for any crypto pair. For execution and slippage-aware agents. Free source. $0.01 USDC via x402 on Base. SYNTHORA.","url":"https://orderbook-liquidity.hergertsynthora.com/service","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"limit":{"type":"integer","description":"limit"},"symbol":{"type":"string","description":"symbol"}}},"responseSchema":{"type":"json","example":{"ok":true,"niche":"orderbook-liquidity","result":{}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_SnQMpVxRDR9FkKKw-Sdeq","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns live order book depth, bid/ask walls, spread, and imbalance metrics for any cryptocurrency trading pair","exampleAgentPrompt":"Pull the live order book depth for BTC/USDT with a limit of 50 levels — I want to see the bid and ask walls, the spread, and whether there's any significant imbalance before I place a large order.","exampleUseCases":[{"title":"Slippage check before large trade","prompt":"Before I execute a $200k buy of ETH/USDC, pull the live order book and tell me how deep the asks are — I need to know how much slippage I should expect and whether there are any big sell walls I'd be chewing through."},{"title":"Crypto arbitrage liquidity scan","prompt":"Check the current bid/ask spread and order book depth for SOL/USDT right now — I'm running an arbitrage strategy and I need to know if there's enough liquidity on both sides to make the trade worth it without moving the market."},{"title":"Detect large buy or sell walls","prompt":"Look up the order book for BTC/ETH with about 100 levels of depth and flag any unusually large bid or ask walls — I want to know if someone has a big limit order sitting out there that could act as support or resistance before I make my next move."}],"resultDescription":"Returns real-time order book data including bid and ask price levels (walls), best bid/ask spread, and order book imbalance metrics for the requested trading pair, scoped to the specified depth limit. Useful for slippage estimation and execution planning.","failureModes":["Unknown or unsupported trading pair symbol returns an error or empty result","Upstream exchange feed failure — no charge applied per stated policy","Invalid limit parameter (non-integer or out-of-range) may return a validation error","Network timeout or service unavailability returns a 5xx error","Wallet address missing or malformed in X-WALLET header may block free-tier access"],"whenToPreferThis":"Use this endpoint when an AI agent needs real-time order book depth and liquidity metrics for crypto execution decisions, slippage estimation, or market microstructure analysis. Prefer it when you need bid/ask walls and imbalance data rather than just a last price or OHLCV data. The free first 3 calls per wallet and no-charge-on-upstream-failure policy makes it low-risk for exploratory use.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:36:34.029Z","isFirstParty":false}