# x402-factory Prediction Market Liquidity Analytics > x402-factory Prediction Market Liquidity Analytics is a paid API for AI agents from x402-factory.com, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-12). Returns real-time liquidity analytics for a prediction market by slug, including bid-ask spreads, order book depth, slippage estimates, and 24-hour volume profiles across Kalshi and Polymarket. ## Facts - Endpoint: GET https://x402-factory.com/v1/liquidity/%7Bslug%7D?utm_source=zero.xyz - Price: $0.03/call - Payment: x402 - Status: unknown - Last checked: 2026-10-12 - Activations on Zero: 0 - Tags: x402 - Canonical page: https://www.zero.xyz/c/x402-factory-prediction-market-liquidity-analytics-07abb1ff - Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_S1hwITbua0Mt5Q0062bwr Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently. ## How to call it through Zero Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`): ```sh zero fetch --capability x402-factory-prediction-market-liquidity-analytics-07abb1ff ``` Example prompt: What's the current liquidity situation for the 'us-presidential-election-2026' market — give me the spread, order book depth within 1 cent and 5 cents, and estimated slippage on both Kalshi and Polymarket, along with the 24-hour volume profile. ## When to prefer this Use this endpoint when you need real-time microstructure data (spread, depth, slippage, volume) for a specific prediction market contract across Kalshi and Polymarket. Prefer it over generic market price endpoints when the goal is execution quality assessment — understanding if and how cheaply a position can be entered or exited — rather than just fetching a probability or price. Best for trading bots, arbitrage detection, and liquidity-aware order routing. ## Known failure modes - Invalid or non-existent slug returns 404 or empty data object - Market not listed on either venue returns empty per_venue array - Slug format mismatch (not kebab-case) causes 400 validation error - Payment not provided returns HTTP 402 with X-PAYMENT requirements - Temporary venue API outage may reduce per_venue coverage to one source - notional_usd outside 1–100000 range causes schema validation rejection ## How this service works Paid data APIs for AI agents: prediction-market analytics, weather intelligence, weather×market edge signals, and SEC/gov data. Paid endpoints use the x402 protocol (HTTP 402 + USDC on Base): call without payment to receive requirements, retry with an X-PAYMENT header. Machine-readable catalog: /llms.txt. Per-endpoint docs: /docs/{id}. ## Output A JSON object with per-venue breakdown (Kalshi and Polymarket) of bid-ask spread in cents, estimated slippage in cents, and order book depth within 1¢ and 5¢ in USD; plus aggregate 24-hour volume in USD; and an hourly volume profile array (hour, volume_usd) covering the last 24 hours. Metadata includes data source, freshness, endpoint version, and a unique request ID. ## Request schema (JSON Schema) ```json { "type": "object", "$schema": "https://json-schema.org/draft/2020-12/schema", "required": [ "input" ], "properties": { "input": { "type": "object", "required": [ "type", "method" ], "properties": { "type": { "type": "string", "const": "http" }, "method": { "enum": [ "GET" ], "type": "string" }, "pathParams": { "type": "object", "required": [ "slug" ], "properties": { "slug": { "type": "string", "pattern": "^[a-z0-9]+(?:-[a-z0-9]+)*$" } } }, "queryParams": { "type": "object", "required": [], "properties": { "notional_usd": { "type": "number", "maximum": 100000, "minimum": 1 } } } }, "additionalProperties": false }, "output": { "type": "object", "required": [ "type" ], "properties": { "type": { "type": "string" }, "example": { "type": "object", "required": [ "data", "meta" ], "properties": { "data": { "type": "object", "required": [ "per_venue", "volume_24h_usd", "volume_profile_24h" ], "properties": { "per_venue": { "type": "array", "items": { "type": "object", "required": [ "venue", "depth_within_1c_usd", "depth_within_5c_usd", "spread_c" ], "properties": { "venue": { "enum": [ "kalshi", "polymarket" ], "type": "string" }, "spread_c": { "type": "number" }, "est_slippage_c": { "type": "number" }, "depth_within_1c_usd": { "type": "number" }, "depth_within_5c_usd": { "type": "number" } }, "additionalProperties": false } }, "volume_24h_usd": { "type": "number" }, "volume_profile_24h": { "type": "array", "items": { "type": "object", "required": [ "hour", "volume_usd" ], "properties": { "hour": { "type": "integer", "maximum": 9007199254740991, "minimum": -9007199254740991 }, "volume_usd": { … (truncated) ``` ## Response schema (JSON Schema) ```json { "type": "json", "example": { "data": { "per_venue": [ { "venue": "kalshi", "spread_c": 1, "est_slippage_c": 0.11, "depth_within_1c_usd": 43511.16, "depth_within_5c_usd": 220022.94 }, { "venue": "polymarket", "spread_c": 1, "est_slippage_c": 0.14, "depth_within_1c_usd": 52295.06, "depth_within_5c_usd": 175633.51 } ], "volume_24h_usd": 591880.68, "volume_profile_24h": [ { "hour": 13, "volume_usd": 22654.53 }, { "hour": 14, "volume_usd": 28433.7 }, { "hour": 15, "volume_usd": 23554.93 }, { "hour": 16, "volume_usd": 24849.59 }, { "hour": 17, "volume_usd": 27004.33 }, { "hour": 18, "volume_usd": 24873.7 }, { "hour": 19, "volume_usd": 20998.15 }, { "hour": 20, "volume_usd": 22003.64 }, { "hour": 21, "volume_usd": 31425.32 }, { "hour": 22, "volume_usd": 24433.02 }, { "hour": 23, "volume_usd": 28671.91 }, { "hour": 0, "volume_usd": 21033.08 }, { "hour": 1, "volume_usd": 19440.17 }, { "hour": 2, "volume_usd": 27355.65 }, { "hour": 3, "volume_usd": 33541.3 }, { "hour": 4, "volume_usd": 19872.25 }, { "hour": 5, "volume_usd": 20189.92 }, { "hour": 6, "volume_usd": 28022.61 }, { "hour": 7, "volume_usd": 25217.71 }, { "hour": 8, "volume_usd": 20702.89 }, { "hour": 9, "volume_usd": 26834.01 }, { "hour": 10, "volume_usd": 22330.71 }, { "hour": 11, "volume_usd": 22008.88 }, { "hour": 12, "volume_usd": 19213.25 } ] }, "meta": { "docs": "https://x402-factory.com/docs/probability.liquidity", "sources": [ "kalshi", "polymarket" ], "version": "1.0.0", "endpoint": "/v1/liquidity/{slug}", "data_mode": "live", "freshness": "realtime", "request_id": "req_00000000", "generated_at": "2026-08-21T03:58:58.104Z" } } } ``` ## More - Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-factory-prediction-market-liquidity-analytics-07abb1ff/health.json - [Zero catalog index](https://www.zero.xyz/llms.txt) - [Other services from x402-factory.com](https://www.zero.xyz/host/x402-factory.com/llms.txt)