# Saylor Innovations Beer-Lambert Calculator

> Saylor Innovations Beer-Lambert Calculator is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-31).

Calculates concentration from absorbance using Beer-Lambert law, including nucleic acid yield/purity, protein A280, and standard curve fitting

## Facts

- Endpoint: GET https://saylorinnovations.com/api/lab/beer-lambert?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/saylor-innovations-beer-lambert-calculator-284a7d7e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_h6sFMEpFSXXusxOcAbRHL

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 saylor-innovations-beer-lambert-calculator-284a7d7e
```

Example prompt: Calculate the DNA concentration from my nucleic_acid measurement — A260 is 0.45, A280 is 0.23, A230 is 0.18, dilution factor is 10, and the nucleic acid type is dsDNA.

## When to prefer this

Use this endpoint when you need rapid, accurate spectrophotometric calculations in a lab or bioinformatics context — especially for nucleic acid quantification (DNA/RNA purity and yield), protein concentration via A280, or standard curve interpolation. Prefer this over manual calculation or spreadsheet tools when automating lab workflows or processing multiple samples programmatically. It covers all major Beer-Lambert modes in a single API, making it ideal for agents that need to interpret nanodrop or spectrophotometer readings without embedding the math locally.

## Known failure modes

- Missing required 'mode' parameter — returns error indicating mode must be one of: beer_lambert, nucleic_acid, protein_a280, standard_curve
- Missing absorbance or transmittance values required for the chosen mode — returns computation error
- Invalid or non-numeric values for absorbance/epsilon/path_length — returns parsing error
- For standard_curve mode: fewer than two standards provided — insufficient data for curve fitting
- Dilution factor of zero — returns division error
- Epsilon of zero with beer_lambert mode — returns invalid parameter error

## How this service works

Concentration from absorbance, nucleic acid yield and purity, protein A280 and standard curve

## Output

Returns a JSON object containing calculated concentration values (in mg/mL and/or molarity depending on inputs), purity ratios (A260/A280, A260/A230 for nucleic acids), yield estimates, and for standard curve mode: curve fit parameters and interpolated concentration for unknown samples.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "mode"
     ],
     "properties": {
      "a230": {
       "type": "string",
       "description": "optional (query)"
      },
      "a260": {
       "type": "string",
       "description": "optional (query)"
      },
      "a280": {
       "type": "string",
       "description": "optional (query)"
      },
      "mode": {
       "type": "string",
       "description": "required beer_lambert, nucleic_acid, protein_a280 or standard_curve (query)"
      },
      "na_type": {
       "type": "string",
       "description": "optional dsdna (default), rna, ssdna or oligo (query)"
      },
      "dilution_factor": {
       "type": "string",
       "description": "optional dilution before the reading, default 1 (query)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/saylor-innovations-beer-lambert-calculator-284a7d7e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from saylorinnovations.com](https://www.zero.xyz/host/saylorinnovations.com/llms.txt)