# Synthetic Yeast Yield Calculator

> Synthetic Yeast Yield Calculator is a paid API for AI agents from bio.halowerk.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-14).

Computes theoretical maximum product yield from multiple substrates by identifying the limiting substrate and applying a process efficiency factor.

## Facts

- Endpoint: POST https://bio.halowerk.com/v1/syn-yeast-yield
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synthetic-yeast-yield-calculator-94c085be
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Jsc96fqvjWlCgPQXlOfOA

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 synthetic-yeast-yield-calculator-94c085be -d '<json body>'
```

Example prompt: I have glucose (500 g available, 0.51 g/g product required) and xylose (200 g available, 0.72 g/g product required) as substrates — can you calculate the theoretical maximum yield at 85% process efficiency?

## When to prefer this

Choose this endpoint when you need a fast, stoichiometric upper-bound estimate of product yield from known substrate quantities and a process efficiency factor, without needing full metabolic modeling, kinetic simulation, or oxygen transfer calculations. It is ideal for rapid feasibility checks, substrate procurement planning, and process bottleneck identification in synthetic biology or bioprocess engineering workflows.

## Known failure modes

- Missing required substrate fields (name, available_g, required_g_per_g_product) returns a 422 validation error
- process_efficiency outside [0,1] returns a 422 validation error
- available_g or required_g_per_g_product set to zero or negative returns a 422 validation error
- More than 100 substrates in the array returns a 422 validation error
- Payment not included or insufficient returns a 402 Payment Required error

## How this service works

Divides each available substrate mass by its required mass per product mass, selects the limiting substrate, and applies a caller-supplied process efficiency. It does not model yeast metabolism, kinetics, oxygen transfer, toxicity, regulation or actual fermentation performance.

## Output

Returns the identity of the limiting substrate (the one that runs out first), the theoretical maximum product mass calculated from that limiting substrate, the efficiency-adjusted yield after applying the caller-supplied process efficiency factor, and per-substrate yield contributions.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "substrates": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "name",
     "available_g",
     "required_g_per_g_product"
    ],
    "properties": {
     "name": {
      "type": "string",
      "maxLength": 128,
      "minLength": 1
     },
     "available_g": {
      "type": "number",
      "maximum": 1000000000000,
      "minimum": 0
     },
     "required_g_per_g_product": {
      "type": "number",
      "maximum": 1000000000000,
      "minimum": 1e-12
     }
    },
    "additionalProperties": false
   },
   "maxItems": 100,
   "minItems": 1
  },
  "process_efficiency": {
   "type": "number",
   "maximum": 1,
   "minimum": 0
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/synthetic-yeast-yield-calculator-94c085be/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from bio.halowerk.com](https://www.zero.xyz/host/bio.halowerk.com/llms.txt)