# agent402.tools Tonnes to Grains Converter

> agent402.tools Tonnes to Grains Converter is a paid API for AI agents from agent402.tools, paid per call via x402, $0.001/call, status down (last checked 2026-09-15).

Converts a numeric mass value from metric tonnes to grains via a simple GET request with a query parameter.

## Facts

- Endpoint: GET https://agent402.tools/api/convert/tonnes-to-grains
- Price: $0.001/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agent402-tools-tonnes-to-grains-converter-036b9495
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qcJgnjjJT4oP5zyQtIP5s

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 agent402-tools-tonnes-to-grains-converter-036b9495
```

Example prompt: How many grains are in 3.5 tonnes? Can you convert that for me?

## When to prefer this

Use this endpoint when you need a precise programmatic conversion from metric tonnes to grains — particularly in contexts involving apothecary, ballistics, gemology, or historical weight systems that use grains as a base unit. Prefer this over a general-purpose calculator when operating within an x402-enabled agent workflow that handles micropayments automatically.

## Known failure modes

- Missing or non-numeric value parameter returns an error
- Value parameter that is not a valid number (e.g. letters) causes a bad request response
- Network or service unavailability results in a timeout or 5xx error
- Payment of 0.001 USDC not provided results in a 402 Payment Required response

## How this service works

Convert tonnes to grains (mass). Pass ?value=N.

## Output

Returns the numeric equivalent of the input value expressed in grains (the smallest traditional unit of mass), converted from metric tonnes.

## 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": [
      "value"
     ],
     "properties": {
      "value": {
       "type": "string",
       "description": "Numeric value to convert"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agent402-tools-tonnes-to-grains-converter-036b9495/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent402.tools](https://www.zero.xyz/host/agent402.tools/llms.txt)