AI Inference · x402 · early usage

Convert a value between units of measure: mass (g, kg, mg, lb, oz, t, st), length (m, k…

by 2s-3cpr6qm6j-alleyford.vercel.app · discovered, not yet claimed by its owner · updated 2026-10-13

30d calls29

30d payers2

MethodGET

Outputjson

Mirrored from Coinbase's public x402 Bazaar. The description is the provider's own text and has not been reviewed here; the payment requirements are copied as published.

What it does

Convert a value between units of measure: mass (g, kg, mg, lb, oz, t, st), length (m, km, cm, mm, in, ft, yd, mi), volume (l, ml, m3, gal, gal-imp, qt, pt, cup, floz, tbsp, tsp), area (m2, km2, ft2, acre, ha), and temperature (C, F, K). Units are matched case-insensitively with common aliases (kg/kilogram/kgs). Returns {value, from, to, dimension, result}. Exact factors — the ground-truth answer a CPG/ETL pipeline needs instead of an LLM approximating conversions. Cross-dimension conversions (kg→m) return 400.

Tags: public-records · identifiers · ai-agents · us-gov-data · x402 · bazaar

Call contract

Method: GET
Input: query parameters
Output: json
Last paid call: 2026-10-13

Input example from Bazaar metadata

{
  "from": "kg",
  "to": "lb",
  "value": 5
}

No output exampleProvider did not publish one in Bazaar metadata.

Use with an agent

Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
Inspect. Fetch /resources/55018.json for the price and payment options.
Pay. Call GET https://2s-3cpr6qm6j-alleyford.vercel.app/api/convert/unit. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
Execute. The provider returns 200 with the data. Agent Bazaar is not in the request path and never sees your payment.

For humans

You don't need an account or an API key; you need a wallet holding a small amount of USDC on Base Sepolia, Solana, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.001 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base Sepolia, Solana
Demand: 29 calls · 2 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base Sepolia eip155:84532	USDC	1000	0xcEE4259Fae5931078Cd3ed030180E55F11BB9f35	60s
exact	Solana solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp	USDC	$0.001	TW6ntaGzvj63ZgPjszd4FCGmVTGfzv1MAYZbjYcyWhn	60s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:84532",
    "payTo": "0xcEE4259Fae5931078Cd3ed030180E55F11BB9f35",
    "asset": "0x036CbD53842c5426634e7929541eC2318f3dCF7e",
    "amount": "1000",
    "maxTimeoutSeconds": 60
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "TW6ntaGzvj63ZgPjszd4FCGmVTGfzv1MAYZbjYcyWhn",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "1000",
    "amountUsd": 0.001,
    "maxTimeoutSeconds": 60
  }
]

Examples

curl

curl "https://2s-3cpr6qm6j-alleyford.vercel.app/api/convert/unit"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://2s-3cpr6qm6j-alleyford.vercel.app/api/convert/unit");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://2s-3cpr6qm6j-alleyford.vercel.app/api/convert/unit")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Details

Provider: 2s-3cpr6qm6j-alleyford.vercel.app
Endpoint: https://2s-3cpr6qm6j-alleyford.vercel.app/api/convert/unit
Machine-readable: /resources/55018.json