---
title: "What would make this transfer cheaper?"
method: POST
path: "/api/route/improve"
tags: ["best-execution"]
---

# What would make this transfer cheaper?

`POST /api/route/improve`

## Request

- Base URL: `https://api.anygas.xyz/svc`
- URL: `https://api.anygas.xyz/svc/api/route/improve`
- Auth: none declared

Every router answers "what does this cost?". None answers "what should I change?". An agent handed a price can only pay it or give up — yet the price is usually a consequence of choices it did not know it was making: the destination chain (payout gas varies by more than 1000x), the size (a fixed cost is ruinous on a small transfer and trivial on a large one), whether the instant float lane applied, and whether the rails that would have competed were even available. Every suggestion carries the REAL saving in base units, computed from the same cost table the router charges from. CRITICAL: suggestions flagged `changesOutcome: true` move WHERE THE MONEY LANDS. Do not apply them as pure cost savings — telling someone to send to a different chain is not a cost tip if that is not where the funds were needed. If nothing can be improved, it says so instead of inventing filler.

## Request body

- RouteRequest
  - `fromChain` union, required: Source node: EVM chain id or one of "solana"/"stellar"/"bitcoin".
    - string
    - integer
  - `toChain` union, required: Destination node.
    - string
    - integer
  - `amount` string, required: Source-token smallest units.
  - `fromToken` string: Symbol or address; omit for native.
  - `toToken` string: Symbol or address; omit for native.
  - `toAddress` string: Recipient; defaults to fromAddress.
  - `fromAddress` string: Quote origin; anonymous default used if omitted.
  - `slippage` number: Fraction, e.g. 0.005.
  - `token` string: Shorthand: sets BOTH fromToken and toToken (e.g. "USDC"). Accepted on POST bodies and as a GET query parameter. Explicit fromToken/toToken win when present.

## Response `200`

Quantified suggestions, each declaring changesOutcome

- object

## Other responses

- `400`: amount is required

---

[API](https://skmtc.dev/anygas/apis/robyn-anygas-api.md) · [All operations](https://skmtc.dev/anygas/apis/robyn-anygas-api/llms.txt) · [OpenAPI document](https://skmtc.dev/anygas/apis/robyn-anygas-api/revisions/9b7498be8304?raw)