---
title: "Run Startup Soundcheck (free)"
method: POST
path: "/api/v1/engines/startup-soundcheck/run"
---

# Run Startup Soundcheck (free)

`POST /api/v1/engines/startup-soundcheck/run`

## Request

- Base URL: `https://signalband.net`
- URL: `https://signalband.net/api/v1/engines/startup-soundcheck/run`
- Auth: one of:
  - none
  - HTTP bearer

Indicative investment-readiness range for a venture from 12 answers across customers, traction, product, unit economics, runway and team.

## Request body

- object
  - `answers` object, required
    - `interviews` '0' | '1-9' | '10-24' | '25-49' | '50+' | 'unsure', required: Structured customer problem interviews in the last 6 months
    - `riskiest` 'no' | 'partly' | 'yes' | 'unsure', required: Riskiest assumption tested with real evidence?
    - `customers` '0' | '1-2' | '3-9' | '10-49' | '50+' | 'unsure', required: Paying customers, paid pilots or signed LOIs
    - `mrr` '0' | '<5k' | '5-25k' | '25-100k' | '100k+' | 'unsure', required: Monthly recurring revenue
    - `stage` 'idea' | 'prototype' | 'mvp' | 'paying' | 'scaling' | 'unsure', required: Product stage
    - `acv` union, required: Average annual revenue per customer (actual or planned)
      - number
      - string
    - `cac` union, required: Average cost to acquire one customer
      - number
      - string
    - `margin` '<30' | '30-50' | '50-70' | '70+' | 'unsure', required: Gross margin %
    - `churn` '<1' | '1-3' | '3-5' | '5+' | 'unsure', required: Monthly customer churn %
    - `cash` union, required: Cash in the bank (closed funding only)
      - number
      - string
    - `burn` union, required: Monthly net burn (0 if cash-flow positive)
      - number
      - string
    - `team` 'solo-pt' | 'solo-ft' | 'multi-ft' | 'multi-ft-domain' | 'unsure', required: Founding team

## Response `200`

Result with provenance

- RunResult
  - `engine` string
  - `result` object
  - `creditsUsed` integer
  - `provenance` object

## Other responses

- `401`: Error
- `402`: Error
- `422`: Error
- `429`: Error

---

[API](https://skmtc.dev/signalband/apis/signal-band-decision-engines.md) · [All operations](https://skmtc.dev/signalband/apis/signal-band-decision-engines/llms.txt) · [OpenAPI document](https://skmtc.dev/signalband/apis/signal-band-decision-engines/revisions/be73c95c8797?raw)