---
title: "Startup Survival — Runway & Trajectory Simulator"
method: POST
path: "/v1/tools/simulate_startup_runway"
tags: ["startup", "runway", "burn rate", "cash", "forecast", "scenario", "founder"]
---

# Startup Survival — Runway & Trajectory Simulator

`POST /v1/tools/simulate_startup_runway`

## Request

- Base URL: `https://ainumbers.co`
- URL: `https://ainumbers.co/v1/tools/simulate_startup_runway`
- Auth: none declared

Models startup cash runway under current and optimised burn/revenue scenarios. Calculates zero-cash date, net burn, and month-by-month trajectory. Supports scenario comparison and produces an AP2 financial health mandate.

**Tool URL:** https://ainumbers.co/tools/87-runway-simulator.html
**AP2/Policy Mandate export:** yes

## Request body

- object
  - `cashBalance` number, required
  - `monthlyRevenue` number, required
  - `monthlyBurn` number, required
  - `growthRatePct` number

## Response `200`

Successful tool execution result

- object
  - `current_runway_months` union
    - number
    - string
  - `current_zero_date` string
  - `optimised_runway_months` union
    - number
    - string
  - `optimised_zero_date` string
  - `net_burn_per_month` number

---

[API](https://skmtc.dev/ainumbers/apis/ainumbers-co-fintech-intelligence-suite.md) · [All operations](https://skmtc.dev/ainumbers/apis/ainumbers-co-fintech-intelligence-suite/llms.txt) · [OpenAPI document](https://skmtc.dev/ainumbers/apis/ainumbers-co-fintech-intelligence-suite/revisions/b462e4f5bb28?raw)