# Saylor Innovations Shipment Carbon Estimator

> Saylor Innovations Shipment Carbon Estimator is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-30).

Estimates the carbon footprint (kg CO2e) of a shipment given cargo mass, distance, and transport mode (air, road, rail, or sea)

## Facts

- Endpoint: GET https://saylorinnovations.com/api/shipping/carbon?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/saylor-innovations-shipment-carbon-estimator-a6f535a4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8TmOR3eDSWUsPt4jzj5vd

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-shipment-carbon-estimator-a6f535a4
```

Example prompt: Estimate the carbon footprint for shipping 2500 kg of cargo by sea over 8000 km — I need the result in kg CO2e with the formula and emission factor used.

## When to prefer this

Choose this endpoint when you need a quick, per-shipment carbon emission estimate based on standard emission factors for a known transport mode, weight, and distance. It is ideal for carbon labeling, sustainability reporting, or logistics mode comparison where a science-based formula and source citation are needed. It is not suited for multi-leg journey aggregation in a single call, real-time carrier-specific tracking data, or scope 1/2/3 full lifecycle analysis.

## Known failure modes

- Missing required query parameters (weight_kg, distance_km, or mode) returns an error
- Invalid mode value (not one of air, road, rail, sea) returns a validation error
- weight_kg or distance_km outside allowed ranges (weight <0.001 or >100,000,000 kg; distance <0.1 or >1,000,000 km) returns a range error
- Non-numeric values for weight_kg or distance_km cause a parsing error
- Payment not provided or insufficient (x402 protocol) results in a 402 Payment Required response

## How this service works

Shipment carbon estimate from cargo mass, distance and mode (air, road, rail, sea) in kg CO2e

## Output

A JSON object containing the input echo (weight_kg, distance_km, mode), computed tonne-km, the emission factor (kg CO2e per tonne-km), estimated CO2e in both grams and kilograms, the formula used for the calculation, a rounding rule note, a scope note explaining what is and isn't covered, and a source note citing the underlying emission factors.

## 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": [
      "weight_kg",
      "distance_km",
      "mode"
     ],
     "properties": {
      "mode": {
       "type": "string",
       "description": "required one of air, road, rail, sea (query)"
      },
      "weight_kg": {
       "type": "string",
       "description": "required finite cargo mass, 0.001-100000000 kg (query)"
      },
      "distance_km": {
       "type": "string",
       "description": "required finite one-way distance, 0.1-1000000 km (query)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object",
     "required": [
      "weight_kg",
      "distance_km",
      "mode",
      "estimated_kg_co2e",
      "formula",
      "scope_note"
     ],
     "properties": {
      "mode": {
       "type": "string",
       "description": "Mode used"
      },
      "factors": {
       "type": "object"
      },
      "formula": {
       "type": "string",
       "description": "Formula used for the calculation"
      },
      "rounding": {
       "type": "string",
       "description": "Rounding rule applied to the figures"
      },
      "tonne_km": {
       "type": "number",
       "description": "Tonne, in kilometres"
      },
      "weight_kg": {
       "type": "number",
       "description": "Weight in kilograms"
      },
      "scope_note": {
       "type": "string",
       "description": "What this data covers and what it leaves out"
      },
      "distance_km": {
       "type": "number",
       "description": "Distance in kilometres"
      },
      "source_note": {
       "type": "string",
       "description": "Source note"
      },
      "estimated_g_co2e": {
       "type": "number",
       "description": "Estimated g co2e"
      },
      "estimated_kg_co2e": {
       "type": "number",
       "description": "Estimated kg co2e"
      },
      "emission_factor_kg_co2e_per_tonne_km": {
       "type": "number",
       "descrip
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/saylor-innovations-shipment-carbon-estimator-a6f535a4/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)