# Routheus DAG Quote — Multichain DEX Swap Router > Routheus DAG Quote — Multichain DEX Swap Router is a paid API for AI agents from routheus.xyz, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-12). Returns best-route swap quotes with optional executable calldata (including Permit2) across 13+ EVM chains using real-time pool state, with optional onchain simulation ## Facts - Endpoint: GET https://routheus.xyz/%7Bchain%7D/api/router/dag-quote?utm_source=zero.xyz - Price: $0.005/call - Payment: x402 - Status: unknown - Last checked: 2026-10-12 - Activations on Zero: 0 - Tags: x402 - Canonical page: https://www.zero.xyz/c/routheus-dag-quote-multichain-dex-swap-router-2dc1d07a - Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_P1PssA8hLVsyNoQ1-VTgv 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 routheus-dag-quote-multichain-dex-swap-router-2dc1d07a ``` Example prompt: What's the best swap route and expected output if I trade 1000 USDC (0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48) for WETH (0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2) on Ethereum mainnet, with 0.5% slippage, and generate the Permit2 calldata so I can sign and send it? ## When to prefer this Choose Routheus when you need real-time, multi-hop DEX swap quotes on EVM chains without API key registration, especially when you want executable Permit2 calldata ready to sign and send, onchain simulation-verified output amounts, or batch pricing across multiple input amounts. Prefer it over static price feeds when you need actual route-aware output accounting for pool liquidity and fees. Its pay-per-call USDC model via x402 makes it ideal for low-frequency agents or automation that shouldn't pay subscription costs. ## Known failure modes - Token pair not found or no liquidity path — ok=false with error string - Invalid token address format — ok=false with validation error - Chain not supported — ok=false with error - amount_in missing or malformed atomic units — ok=false - simulate=true timeout or RPC failure — may fall back or error - Slippage parameter conflict (both slippage and slippage_bps supplied) — unexpected behavior - Batch exceeds 50 amounts — likely rejected or truncated - x402 payment failure — 402 response before quote is returned ## How this service works Routheus: live DEX token prices and best-route swap quotes from a real-time pool-state engine, executable routes with calldata (Permit2), simulation-verified outputs, token metadata, search and pool data on 13+ EVM chains. Pay per call in USDC via x402 — no API keys, no subscription. ## Output Returns a JSON object with ok=true on success, including: the optimal route broken into proportional legs with pool addresses and hop details, amount_out in atomic units (onchain-simulated if simulate=true), gas_estimate, fee_bps, optional executable tx or tx_permit2 calldata when recipient is specified, min_amount_out enforced by calldata, and warnings. Batch mode returns per-amount results keyed by input amount. Returns ok=false with an error string on failure (no charge). ## Request schema (JSON Schema) ```json { "type": "object", "required": [ "token_in", "token_out" ], "properties": { "to": { "type": "string", "description": "Swap recipient — presence triggers calldata generation" }, "simulate": { "type": "string", "description": "true = amount_out becomes the onchain-simulated result (higher price)" }, "slippage": { "type": "string", "description": "Slippage tolerance in percent (alternative to slippage_bps)" }, "token_in": { "type": "string", "description": "Input token address (0x…)" }, "amount_in": { "type": "string", "description": "Input amount in atomic units" }, "token_out": { "type": "string", "description": "Output token address (0x…)" }, "amounts_in": { "type": "string", "description": "Comma-separated batch of input amounts (max 50, 10% batch discount)" }, "slippage_bps": { "type": "string", "description": "Slippage tolerance in basis points" }, "with_permit2_data": { "type": "string", "description": "true = also return Permit2 calldata template + signature offsets" }, "quote_on_top_of_amounts": { "type": "string", "description": "Comma-separated prior in-transit amounts (max 8) applied to pool state before the final quote — arbitrage product, premium price (simulate is ignored on these requests)" } } } ``` ## Response schema (JSON Schema) ```json { "type": "object", "required": [ "ok" ], "properties": { "ok": { "type": "boolean" }, "tx": { "type": "object", "properties": { "to": { "type": "string" }, "data": { "type": "string" }, "value": { "type": "string" }, "chainId": { "type": "integer" } }, "description": "Ready-to-send transaction (present with to=)" }, "batch": { "type": "boolean", "description": "true for amounts_in batches" }, "error": { "type": "string", "description": "Present when ok=false (never charged)" }, "route": { "type": "array", "items": { "type": "object", "properties": { "hops": { "type": "array", "items": { "type": "object", "properties": { "pool": { "type": "string", "description": "Pool contract address / id" }, "type": { "type": "string", "description": "Pool kind, e.g. UniswapV3" }, "token_in": { "type": "string" }, "token_out": { "type": "string" } } } }, "share": { "type": "number" }, "amount_in": { "type": "string" }, "amount_out": { "type": "string" } } }, "description": "Proportional legs (single route = one leg with share 1.0)" }, "fee_bps": { "type": "integer" }, "results": { "type": "object", "description": "Batch mode: per-amount responses keyed by amount", "additionalProperties": true }, "chain_id": { "type": "integer" }, "warnings": { "type": "array", "items": { "type": "string" } }, "amount_in": { "type": "string", "description": "Atomic units" }, "amount_out": { "type": "string", "description": "Atomic units; with simulate=true this IS the onchain-simulated result" }, "simulation": { "type": "object", "properties": { "success": { "type": "boolean" }, "gas_used": { "type": "integer" }, "amount_out": { "type": "string" } } }, "tx_permit2": { "type": "object", "properties": { "to": { "type": "string" }, "data": { "type": "string" }, "value": { "type": "string" }, "nonce_offset": { "type": "integer" }, "signature_length": { "type": "integer" }, "signature_offset": { "type": "integer" }, "permit_deadline_offset": { "typ … (truncated) ``` ## More - Live health (JSON, refreshed every minute): https://www.zero.xyz/c/routheus-dag-quote-multichain-dex-swap-router-2dc1d07a/health.json - [Zero catalog index](https://www.zero.xyz/llms.txt) - [Other services from routheus.xyz](https://www.zero.xyz/host/routheus.xyz/llms.txt)